@import url("https://fonts.googleapis.com/css2?family=Unbounded:wght@400;500;600;700;800&display=swap");
:root{
  --bg:#f5f6f8;--panel:#fff;--text:#15171a;--muted:#717780;--line:#e4e7eb;
  --accent:#181818;--accent2:#f0f2f5;--ok:#1f8b4c;--warn:#a66300;--bad:#b42318;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box} body{margin:0;background:var(--bg);color:var(--text)} button,input,select,textarea{font:inherit}
button{cursor:pointer} a{color:inherit}.hidden{display:none!important}.muted{color:var(--muted)}.small{font-size:12px}.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.center-page{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:min(420px,100%);background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:0 20px 60px #00000012}
.brand{font-weight:800;font-size:24px;letter-spacing:-.04em}.auth-card h1{font-size:28px;margin:20px 0 8px}.auth-card p{color:var(--muted);line-height:1.5}.field{display:grid;gap:7px;margin:14px 0}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea,.search{width:100%;border:1px solid #d8dce2;background:#fff;border-radius:12px;padding:11px 12px;outline:none}.field textarea{min-height:120px;resize:vertical}.field input:focus,.field textarea:focus,.field select:focus,.search:focus{border-color:#999;box-shadow:0 0 0 3px #00000008}
.btn{border:1px solid var(--line);background:#fff;border-radius:11px;padding:10px 14px;font-weight:650}.btn:hover{background:#f7f7f7}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.danger{color:var(--bad)}.btn.ghost{border-color:transparent;background:transparent}.btn.sm{padding:7px 10px;font-size:13px}.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.layout{min-height:100vh;display:grid;grid-template-columns:230px 1fr}.sidebar{background:#fff;border-right:1px solid var(--line);padding:22px 16px;display:flex;flex-direction:column;gap:22px;position:sticky;top:0;height:100vh}.nav{display:grid;gap:5px}.nav button{border:0;background:transparent;text-align:left;border-radius:10px;padding:10px 12px;color:#525861}.nav button.active,.nav button:hover{background:#f0f1f3;color:#111}.sidebar-footer{margin-top:auto}.content{padding:28px;max-width:1500px;width:100%;margin:0 auto}.topbar{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:24px}.topbar h1{margin:0;font-size:30px;letter-spacing:-.04em}.topbar p{margin:6px 0 0;color:var(--muted)}
.grid{display:grid;gap:14px}.grid.cols3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}.metric{font-size:32px;font-weight:800;margin-top:8px}.section-title{display:flex;justify-content:space-between;align-items:center;margin:24px 0 12px}.section-title h2{margin:0;font-size:20px}.list{display:grid;gap:10px}.row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;display:flex;justify-content:space-between;gap:16px;align-items:center}.row-main{min-width:0}.row h3{margin:0 0 4px;font-size:16px}.row p{margin:0;color:var(--muted);font-size:13px}.pill{display:inline-flex;padding:4px 8px;border-radius:999px;background:#f0f2f4;font-size:12px;font-weight:700}.pill.ok{background:#e9f7ef;color:var(--ok)}.pill.warn{background:#fff4e0;color:var(--warn)}.pill.bad{background:#fdecec;color:var(--bad)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:16px}.form-grid{display:grid;grid-template-columns:1fr 140px auto;gap:10px;align-items:end}.empty{border:1px dashed #cfd4da;border-radius:16px;padding:30px;text-align:center;color:var(--muted);background:#ffffff80}.topic-card{cursor:pointer}.topic-card:hover{border-color:#b9bec6}.prewrap{white-space:pre-wrap;line-height:1.65}.item-box{border:1px solid var(--line);border-radius:12px;padding:14px;margin:10px 0;background:#fbfbfc}.item-box h4{margin:0 0 8px}.split{display:grid;grid-template-columns:minmax(340px,.85fr) minmax(500px,1.4fr);gap:16px;align-items:start}.lesson-material{max-height:calc(100vh - 130px);overflow:auto}.sticky-board{position:sticky;top:20px}
.board-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.board-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px 12px;border-bottom:1px solid var(--line);background:#fafafa}.board-toolbar .status{margin-left:auto;font-size:12px;color:var(--muted)}.color-dot{width:24px;height:24px;border-radius:50%;border:2px solid transparent;padding:0}.color-dot.active{outline:2px solid #8b8f96}.board-wrap{height:620px;position:relative;background:#fff;touch-action:none;overflow:hidden}.board-svg{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair}.board-grid{position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(#d7dbe0 1px,transparent 1px);background-size:20px 20px;opacity:.55}
.assignment{display:grid;grid-template-columns:1fr auto;gap:12px}.answers{display:grid;gap:12px}.answer-item{border:1px solid var(--line);border-radius:12px;padding:14px}.answer-item.correct{border-color:#b9dfc9;background:#f5fbf7}.answer-item.wrong{border-color:#edc0bc;background:#fff8f7}.score{font-size:38px;font-weight:850;letter-spacing:-.05em}.notice{padding:12px 14px;border-radius:12px;background:#f2f4f6;color:#4f5660;margin:12px 0}.toast{position:fixed;right:20px;bottom:20px;background:#17191c;color:#fff;padding:11px 14px;border-radius:12px;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s;z-index:99}.toast.show{opacity:1;transform:none}
.student-shell{max-width:1040px;margin:0 auto;padding:24px}.student-head{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:20px}.tabs{display:flex;gap:8px}.tabs button{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px}.tabs button.active{background:#17191c;color:#fff}.student-board .board-wrap{height:72vh}
.modal-backdrop{position:fixed;inset:0;background:#0006;display:grid;place-items:center;padding:20px;z-index:80}.modal{width:min(720px,100%);max-height:88vh;overflow:auto;background:#fff;border-radius:18px;padding:20px}.modal h2{margin-top:0}.hr{height:1px;background:var(--line);margin:18px 0}
@media(max-width:900px){.layout{grid-template-columns:1fr}.sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:14px}.nav{display:flex;overflow:auto}.sidebar-footer{display:none}.content{padding:18px}.grid.cols3,.grid.cols2,.split{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.sticky-board{position:static}.board-wrap{height:520px}.topbar{flex-direction:column}.row{align-items:flex-start;flex-direction:column}.assignment{grid-template-columns:1fr}.student-head{align-items:flex-start;flex-direction:column}}

/* v0.7 mathematical whiteboard */
.board-toolbar{align-items:flex-start}.board-tools{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.board-select{width:auto!important;padding:7px 9px}.board-toolbar .btn.active{background:#17191c;color:#fff;border-color:#17191c}.board-toolbar .status{align-self:center;white-space:nowrap}.board-svg text{user-select:none;pointer-events:none}.lesson-material .item-box .actions{margin-bottom:8px}
@media(max-width:650px){.board-toolbar{padding:8px}.board-tools{width:100%}.board-toolbar .status{margin-left:0}.board-wrap{height:62vh}.student-board .board-wrap{height:68vh}.board-tools .btn{padding:7px 9px;font-size:12px}}

/* v0.8 schedule + student progress */
.grid.cols4{grid-template-columns:repeat(4,minmax(0,1fr))}
.schedule-form{display:grid;grid-template-columns:1fr 1.4fr 1fr 130px;gap:12px;align-items:end}
.schedule-form .field{margin:0}
.schedule-row .pill{margin-top:6px}
.student-profile-head{display:flex;justify-content:space-between;align-items:center;gap:18px}
.profile-edit{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.profile-edit input,.profile-edit select{border:1px solid #d8dce2;border-radius:10px;padding:8px 10px;background:#fff}
.profile-edit input{width:180px}.profile-edit select{width:85px}
.profile-metrics{margin-top:16px}.profile-metrics .metric{font-size:27px}
.progress-row{padding:12px 0;border-bottom:1px solid var(--line)}.progress-row:last-child{border-bottom:0}.progress-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.progress-track{height:8px;border-radius:999px;background:#eceff2;overflow:hidden}.progress-fill{height:100%;border-radius:999px;background:#1b1d20;min-width:4px}
.student-lesson{border-left:4px solid #17191c}
@media(max-width:1100px){.grid.cols4{grid-template-columns:repeat(2,minmax(0,1fr))}.schedule-form{grid-template-columns:1fr 1fr}}
@media(max-width:650px){.grid.cols4,.schedule-form{grid-template-columns:1fr}.student-profile-head{align-items:flex-start;flex-direction:column}.profile-edit{width:100%}.profile-edit input{flex:1;min-width:0}}

/* v0.9 built-in 1:1 WebRTC video lesson */
.lesson-right{display:grid;gap:14px;min-width:0}.lesson-right .sticky-board{top:14px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.video-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);background:#fafafa}
.video-stage{position:relative;aspect-ratio:16/8.4;background:#101114;overflow:hidden}
.remote-video{width:100%;height:100%;object-fit:cover;display:block;background:#101114}
.local-video{position:absolute;right:12px;bottom:12px;width:27%;max-width:190px;aspect-ratio:16/10;object-fit:cover;background:#25272b;border:2px solid #fff;border-radius:12px;box-shadow:0 8px 30px #0005}
.video-empty{position:absolute;inset:0;display:grid;place-content:center;text-align:center;gap:8px;color:#c9cdd4;pointer-events:none;background:radial-gradient(circle at center,#25272b,#101114 70%)}
.video-empty.hidden{display:none}.video-empty-icon{font-size:42px;color:#fff}
.video-controls{display:flex;gap:7px;align-items:center;flex-wrap:wrap;padding:10px 12px;border-top:1px solid #24262a;background:#fff}
.video-note{padding:0 12px 12px;line-height:1.45}.video-controls .btn:disabled{opacity:.45;cursor:not-allowed}
.student-lesson-room{display:grid;gap:14px}.student-lesson-room .video-stage{aspect-ratio:16/9}.student-lesson-room .student-board .board-wrap{height:62vh}
@media(max-width:900px){.lesson-right .sticky-board{position:static}.video-stage{aspect-ratio:16/9}.local-video{width:30%}}
@media(max-width:650px){.video-head{align-items:flex-start}.video-controls{display:grid;grid-template-columns:1fr 1fr}.video-controls .btn{width:100%}.local-video{width:34%;right:8px;bottom:8px;border-radius:9px}.student-lesson-room .student-board .board-wrap{height:58vh}}

/* v1.0 lesson history, summaries, recording and settings */
.history-filter{margin-bottom:14px}.lesson-history-row{align-items:flex-start}.summary-preview{margin-top:7px;max-width:760px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#5d636c}.record-btn{color:#a11212;border-color:#e7c6c6}.record-btn.recording{background:#b42318;color:#fff;border-color:#b42318;animation:recordPulse 1.4s infinite}.modal textarea{min-height:105px}.modal .field+ .field{margin-top:12px}
@keyframes recordPulse{50%{opacity:.72}}
@media(max-width:650px){.lesson-history-row{width:100%}.summary-preview{white-space:normal}.history-filter .search{width:100%!important}}

/* v1.1 infinite board navigation */
.board-hint{padding:7px 12px;border-bottom:1px solid var(--line);background:#fff;color:var(--muted);font-size:12px;line-height:1.4}
.board-view-tools{margin-left:auto}
.board-zoom-label{min-width:58px;font-variant-numeric:tabular-nums}
.board-grid{background-repeat:repeat}
.board-card:fullscreen{width:100vw;height:100vh;border:0;border-radius:0;background:#fff;display:flex;flex-direction:column}
.board-card:fullscreen .board-toolbar{flex:0 0 auto}
.board-card:fullscreen .board-hint{flex:0 0 auto}
.board-card:fullscreen .board-wrap{height:auto!important;flex:1 1 auto;min-height:0}
.board-card:fullscreen .board-svg{height:100%}
@media(max-width:900px){.board-view-tools{margin-left:0}.board-hint{font-size:11px}}
@media(max-width:650px){.board-view-tools{display:grid!important;grid-template-columns:auto auto auto 1fr 1fr 1fr;width:100%}.board-view-tools .btn{min-width:0;padding-left:7px;padding-right:7px}.board-hint{display:none}}

/* math tools: templates, coordinate planes, graphs and formulas */
.math-board-tools{padding-top:2px}
#shapeTemplate{min-width:128px}
.board-svg [data-id]{vector-effect:non-scaling-stroke}
.board-svg text{vector-effect:non-scaling-stroke}
@media(max-width:650px){
  .math-board-tools{display:grid!important;grid-template-columns:auto auto auto auto 1fr 1fr;width:100%}
  .math-board-tools #shapeTemplate{grid-column:span 2;min-width:0;width:100%!important}
  .math-board-tools #coordinatePlane,.math-board-tools #functionGraph{white-space:nowrap}
}

/* v1.3 board pages + object editing */
.board-pages{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line);background:#f7f8fa;min-height:44px}
.board-page-tabs{display:flex;gap:6px;align-items:center;overflow:auto;min-width:0;scrollbar-width:thin}
.board-page-tab{border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 11px;white-space:nowrap;font:inherit;font-size:12px;cursor:pointer;color:var(--text)}
.board-page-tab.active{background:#17191c;color:#fff;border-color:#17191c}
.board-page-actions{display:flex;gap:6px;flex:0 0 auto}
.board-selection-tools{border-left:1px solid var(--line);padding-left:8px}
.board-selection-ui circle{cursor:nwse-resize;pointer-events:all}
.board-selection-ui circle[data-resize-handle="ne"],.board-selection-ui circle[data-resize-handle="sw"]{cursor:nesw-resize}
@media(max-width:900px){.board-pages{align-items:flex-start;flex-direction:column}.board-page-actions{width:100%;overflow:auto}.board-selection-tools{border-left:0;padding-left:0}}
@media(max-width:650px){.board-page-actions .btn{white-space:nowrap}.board-selection-tools{width:100%}}

/* v1.4 templates, imports and PDF export */
.template-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:12px 0 18px}
.template-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:14px;text-align:left;cursor:pointer;display:grid;gap:5px;font:inherit;color:var(--text)}
.template-card:hover{border-color:#9aa0a8;background:#fafafa}.template-card span{font-size:12px;color:var(--muted)}
.board-svg image{pointer-events:none}
@media(max-width:650px){.template-grid{grid-template-columns:1fr}.math-board-tools #templatesBoard,.math-board-tools #importBoard,.math-board-tools #exportPagePdf,.math-board-tools #exportAllPdf{white-space:nowrap}}

/* v1.5 generators, math checking and board history */
.generator-card{border-style:dashed;background:linear-gradient(180deg,#fbfcff,#fff)}
.generator-card h3{font-size:16px}.answer-help{line-height:1.55;padding:8px 0}
.board-back{font-weight:650}.board-toolbar .btn:disabled{opacity:.42;cursor:not-allowed}

/* v1.6 task bank, smart homework and unified board undo */
.task-preview{border:1px dashed #c8cdd5;border-radius:12px;padding:12px 14px;background:#fbfcfe;margin:8px 0 12px}
.task-preview-math{font-family:"Cambria Math","Times New Roman",serif;font-size:20px;line-height:1.55;margin-top:6px;white-space:pre-wrap}
.task-meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.tag-line{font-size:12px;color:#5f6670;margin-top:8px}
.smart-homework{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}.smart-counts{display:flex;align-items:end;gap:8px;flex-wrap:wrap}.smart-counts label{font-size:12px;color:var(--muted);display:grid;gap:4px}.smart-counts input{width:64px;border:1px solid #d8dce2;border-radius:9px;padding:8px;background:#fff}.smart-counts select{max-width:170px}
.task-bank-filters{margin-bottom:14px}.task-bank-row{align-items:flex-start}.task-bank-row .row-main{flex:1}.task-bank-row .prewrap{margin-top:7px}
.board-back{font-weight:750}
@media(max-width:800px){.smart-homework{align-items:flex-start;flex-direction:column}.smart-counts{width:100%}.smart-counts .btn{width:100%}.task-bank-row{align-items:flex-start;flex-direction:column}}

/* v1.8 — task library + saved lesson board versions */
.board-card{position:relative}
.board-task-library{position:absolute;z-index:30;right:12px;top:118px;width:min(380px,calc(100% - 24px));max-height:calc(100% - 142px);overflow:auto;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 18px 55px rgba(15,23,42,.18);padding:14px}
.board-task-library.hidden{display:none}
.board-library-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:12px}
.board-library-filters{display:grid;gap:8px;margin-bottom:10px}
.board-library-list{display:grid;gap:9px;margin-top:9px}
.board-library-item{border:1px solid var(--line);border-radius:12px;padding:11px;background:#fbfbfc;display:grid;gap:7px}
.board-library-item .btn{justify-self:start}
.board-library-prompt{font-size:13px;line-height:1.45;white-space:pre-wrap;max-height:92px;overflow:hidden;color:#34383e}
.actions.compact{gap:5px;align-items:center}
.board-card.readonly .board-selection-tools{display:none}
.board-card.readonly #clearBoard,.board-card.readonly #backBoard,.board-card.readonly #redoBoard,.board-card.readonly #taskLibraryBoard,.board-card.readonly #templatesBoard,.board-card.readonly #importBoard,.board-card.readonly #coordinatePlane,.board-card.readonly #functionGraph,.board-card.readonly #shapeTemplate,.board-card.readonly #strokeWidth,.board-card.readonly [data-color],.board-card.readonly [data-tool]:not([data-tool="hand"]),.board-card.readonly .board-page-actions{display:none!important}
.lesson-version-row{align-items:center}
@media(max-width:650px){.board-task-library{right:6px;top:170px;width:calc(100% - 12px);max-height:65vh}}

/* v1.8 — faster task library + notes on lesson board versions */
.library-modes,.library-quick-difficulty{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:9px}
.library-modes .btn.active{background:#17191c;color:#fff;border-color:#17191c}
.quick-filter{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;font:inherit;font-size:12px;cursor:pointer;color:#4f5660}
.quick-filter.active{background:#eef0f3;color:#17191c;border-color:#b8bec6;font-weight:700}
.library-summary{justify-content:space-between;margin:7px 0 2px}
.library-item-head{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}
.favorite-star{border:0;background:transparent;font-size:21px;line-height:1;padding:1px 3px;cursor:pointer;color:#8b929b}
.favorite-star.active{color:#1a1d21}
.version-note-preview{margin-top:7px;padding:7px 9px;border-radius:9px;background:#f3f5f7;color:#4d555f;font-size:12px;line-height:1.45;white-space:pre-wrap}
.quick-note-row{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px}
@media(max-width:650px){.library-modes,.library-quick-difficulty{overflow:auto;flex-wrap:nowrap;padding-bottom:2px}.library-modes .btn,.quick-filter{white-space:nowrap}.version-note-preview{max-width:100%}}

/* v1.9+ — lesson timer, current task navigation and student focus mode */
.lesson-live-mount{margin-bottom:12px}
.lesson-live-card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px 14px;display:grid;gap:10px}
.lesson-live-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.lesson-timer-block{display:flex;align-items:baseline;gap:10px}.lesson-timer{font-variant-numeric:tabular-nums;font-size:27px;font-weight:760;letter-spacing:.02em}
.lesson-current-task{border:1px solid #dfe3e8;border-radius:13px;background:#fafbfc;padding:11px 13px;min-height:66px}
.lesson-current-task h3{margin:2px 0 7px;font-size:14px}.lesson-task-kicker{text-transform:uppercase;letter-spacing:.08em;font-size:10px;color:var(--muted);font-weight:800}
.lesson-task-prompt{font-family:"Cambria Math","Times New Roman",serif;font-size:20px;line-height:1.48;white-space:pre-wrap}.lesson-answer{margin-top:7px}
.lesson-live-actions{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.lesson-live-actions .btn.active{background:#17191c;color:#fff;border-color:#17191c}
.student-live-mount{margin:0 auto 12px;max-width:1180px}.student-live-mount .lesson-live-card{position:sticky;top:8px;z-index:15}
.student-focus{max-width:none!important;padding:12px!important}.student-focus .student-head{display:none!important}.student-focus #studentVideo{display:none!important}.student-focus #studentContent{max-width:1500px;margin:0 auto;width:100%}
.student-focus .student-lesson-room{display:block!important}.student-focus .student-board{width:100%!important}.student-focus .board-card{min-height:calc(100vh - 175px)}.student-focus .board-wrap{height:calc(100vh - 355px);min-height:420px}
.student-focus .student-live-mount{max-width:1500px}.student-focus .lesson-live-card{box-shadow:0 10px 35px rgba(15,23,42,.08);border-color:#b9c0c9}.student-focus .lesson-current-task{background:#fff}
@media(max-width:700px){.lesson-live-top{align-items:flex-start}.lesson-live-actions{display:grid;grid-template-columns:1fr 1fr}.lesson-live-actions .btn{width:100%}.lesson-task-prompt{font-size:18px}.student-focus{padding:6px!important}.student-focus .board-wrap{height:62vh;min-height:390px}}

/* v2.0 — lesson queue, task outcomes and automatic lesson report */
.lesson-task-status-actions{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:2px 0}
.lesson-task-status-actions .btn.active{background:#17191c;color:#fff;border-color:#17191c}
.lesson-task-status-actions .btn.warn{background:#fff7ed;color:#9a3412;border-color:#fdba74}
.homework-added{margin-top:7px;color:#166534;font-weight:700}
.lesson-queue{border-top:1px solid var(--line);padding-top:9px}
.lesson-queue summary{cursor:pointer;user-select:none;display:flex;gap:8px;align-items:center;list-style:none}
.lesson-queue summary::-webkit-details-marker{display:none}
.lesson-queue-list{display:grid;gap:6px;margin-top:9px;max-height:270px;overflow:auto;padding-right:3px}
.lesson-queue-row{display:flex;align-items:center;justify-content:space-between;gap:8px;border:1px solid var(--line);border-radius:11px;background:#fff;padding:5px 6px 5px 4px}
.lesson-queue-row.current{border-color:#8b949e;box-shadow:0 0 0 2px rgba(15,23,42,.05)}
.lesson-queue-row.status-solved{background:#f0fdf4;border-color:#bbf7d0}
.lesson-queue-row.status-hard{background:#fff7ed;border-color:#fed7aa}
.lesson-queue-row.status-later{background:#f8fafc;border-color:#cbd5e1}
.queue-select{flex:1;min-width:0;border:0;background:transparent;display:flex;align-items:flex-start;gap:8px;text-align:left;padding:5px;cursor:pointer;color:inherit}
.queue-select>span:last-child{display:grid;min-width:0;gap:2px}.queue-select b{font-size:13px}.queue-select small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:560px}
.queue-status{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#f1f3f5;font-weight:800;flex:0 0 auto}
.icon-btn{width:28px;height:28px;border:0;border-radius:8px;background:transparent;cursor:pointer;font-size:18px;color:var(--muted)}.icon-btn:hover{background:#f1f3f5;color:#111}
.lesson-report-preview{border:1px solid #dbe4ea;background:#f8fafc;border-radius:13px;padding:12px;margin:8px 0 14px;display:grid;gap:8px}
.report-stats{display:flex;gap:7px;flex-wrap:wrap}.report-stats span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 8px;font-size:12px}
@media(max-width:700px){.lesson-task-status-actions{display:grid;grid-template-columns:1fr 1fr}.lesson-task-status-actions>.small{grid-column:1/-1}.queue-select small{max-width:210px}.lesson-queue-list{max-height:220px}}

/* Mathroom Web v3.1 — cloud lesson workflow */
.board-sep{width:1px;height:28px;background:var(--line);margin:0 2px}.board-card:fullscreen{background:#fff;width:100vw;height:100vh;border-radius:0}.board-card:fullscreen .board-stage{height:calc(100vh - 110px)}
.wide-modal{width:min(980px,100%)}.snapshot-modal{width:min(1200px,100%)}.snapshot-modal .board-stage{height:66vh}.modal-default-close{justify-content:flex-end}
.lesson-cloud-layout{align-items:start}.lesson-live-card{margin-bottom:12px}.lesson-queue-row .queue-select{font:inherit}.lesson-queue-row .icon-btn{flex:0 0 auto}
.student-live-mount{margin-bottom:14px}.student-focus{max-width:1500px;margin:0 auto;padding:12px}.student-focus #focusBoard .board-stage{height:calc(100vh - 250px);min-height:480px}
.student-profile-head h2{margin:8px 0 0}.profile-metrics{margin-top:14px}.assignment .pill{margin-top:6px}
.answer-item b{display:block;margin-bottom:8px}.answer-item .field{margin-bottom:0}.answers .btn.primary{justify-self:start}
@media(max-width:700px){.board-sep{display:none}.student-focus #focusBoard .board-stage{height:64vh;min-height:400px}.lesson-cloud-layout{display:block}.lesson-cloud-material{max-height:none}.lesson-live-actions{grid-template-columns:1fr 1fr}.wide-modal,.snapshot-modal{width:100%}}

/* v3.4 — WebRTC video, lesson progress and reusable lesson plans */
.mr-lesson-addon{display:grid;gap:12px;margin:12px 0}.mr-addon-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 14px;border:1px solid var(--line);background:#fff;border-radius:14px}.mr-addon-toolbar #mrProgressMount{flex:1;min-width:240px}.mr-progress{display:grid;gap:7px}.mr-progress-top{display:flex;justify-content:space-between;gap:12px;font-size:13px}.mr-progress-bar{height:8px;border-radius:999px;background:#eceff2;overflow:hidden}.mr-progress-bar i{display:block;height:100%;background:#1f7a4f;border-radius:999px;transition:width .25s}.mr-progress-stats{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.mr-video-card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px;display:grid;gap:10px}.mr-video-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.mr-video-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:10px;min-height:280px}.mr-video-frame{position:relative;background:#111317;border-radius:13px;overflow:hidden;min-height:180px}.mr-video-frame video{display:block;width:100%;height:100%;object-fit:cover;background:#111317}.mr-video-frame span{position:absolute;left:8px;bottom:8px;padding:4px 7px;border-radius:8px;background:#0009;color:#fff;font-size:11px}.mr-video-frame.local{min-height:150px}.mr-video-actions{flex-wrap:wrap}
.mr-video-card.compact{padding:8px;position:relative}.mr-video-card.compact .mr-video-head{margin-bottom:2px}.mr-video-card.compact .mr-video-grid{grid-template-columns:minmax(0,1fr) 120px;min-height:150px}.mr-video-card.compact .mr-video-frame{min-height:120px}.mr-video-card.compact .mr-video-frame.local{min-height:90px}.student-focus #mrStudentVideoMount{max-width:1500px;margin:0 auto 10px}.student-focus .mr-video-card{box-shadow:0 8px 28px #0001}.student-focus .mr-video-grid{max-height:210px}.student-focus .mr-video-frame{min-height:160px}
@media(max-width:900px){.mr-addon-toolbar{align-items:stretch;flex-direction:column}.mr-video-grid{grid-template-columns:1fr 120px;min-height:220px}.mr-video-frame{min-height:190px}.mr-progress-stats{gap:8px}.mr-video-actions{display:grid;grid-template-columns:1fr 1fr}.mr-video-actions .btn{width:100%}}
@media(max-width:600px){.mr-video-grid{grid-template-columns:1fr}.mr-video-frame.local{position:absolute;width:105px;height:80px;min-height:0;right:18px;top:58px;border:2px solid #fff;z-index:2}.mr-video-card{position:relative}.mr-video-frame.remote{min-height:210px}.mr-video-actions{grid-template-columns:1fr 1fr}.mr-addon-toolbar .actions{display:grid;grid-template-columns:1fr 1fr;width:100%}.mr-addon-toolbar .actions .btn:first-child{grid-column:1/-1}}

/* CUMULATIVE WIP — lesson workspace, pinned task, quick notes, queue cockpit */
.mr-board-companion{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:10px;margin:0 0 10px;position:sticky;top:8px;z-index:18}
.mr-pinned-task-card,.mr-quick-notes-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:11px 12px;box-shadow:0 7px 24px rgba(15,23,42,.045)}
.mr-pinned-head,.mr-note-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:8px}.mr-pinned-task-card h3{margin:3px 0 6px;font-size:15px}.mr-pinned-prompt{font-family:"Cambria Math","Times New Roman",serif;font-size:18px;line-height:1.42;max-height:150px;overflow:auto;padding:8px 0}.mr-queue-cockpit{display:grid;gap:7px;margin-top:8px}.mr-queue-cockpit .search{padding:8px 10px}.mr-queue-nav,.mr-quick-status{gap:5px}.mr-queue-nav .btn,.mr-quick-status .btn{padding:7px 9px}.mr-quick-status .btn.active{background:#17191c;color:#fff;border-color:#17191c}
.mr-quick-notes-card textarea{width:100%;min-height:118px;resize:vertical;border:1px solid #d8dce2;border-radius:11px;padding:9px 10px;font:13px/1.48 inherit;outline:none;background:#fff}.mr-quick-notes-card textarea:focus{border-color:#999;box-shadow:0 0 0 3px #00000008}.mr-quick-notes-card .actions{margin-top:7px}
.mr-board-companion.collapsed{grid-template-columns:1fr}.mr-board-companion.collapsed .mr-quick-notes-card,.mr-board-companion.collapsed #mrPinnedTaskBody,.mr-board-companion.collapsed .mr-queue-cockpit{display:none}.mr-board-companion.collapsed .mr-pinned-task-card{padding:8px 11px}.mr-board-companion.collapsed .mr-pinned-head{margin:0;align-items:center}
@media(max-width:1100px){.mr-board-companion{position:static;grid-template-columns:1fr}.mr-quick-notes-card textarea{min-height:90px}}
@media(max-width:650px){.mr-queue-nav,.mr-quick-status{display:grid;grid-template-columns:1fr 1fr}.mr-queue-nav .btn,.mr-quick-status .btn{width:100%}.mr-pinned-prompt{font-size:17px;max-height:120px}}

/* CUMULATIVE WIP — queue manager + lesson timeline */
.mr-queue-manager-head,.mr-history-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.mr-queue-manager-head h2,.mr-history-head h2{margin-bottom:4px}.mr-queue-manager-tools{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(150px,.6fr) minmax(150px,.6fr);gap:8px;margin:12px 0}.mr-queue-manager-actions{gap:6px;flex-wrap:wrap;margin-bottom:10px}.mr-queue-manager-list{display:grid;gap:6px;max-height:56vh;overflow:auto;padding-right:3px}.mr-qm-row{display:grid;grid-template-columns:22px 34px minmax(0,1fr) auto auto;gap:8px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:8px 9px;background:#fff;cursor:pointer}.mr-qm-row:hover{border-color:#aeb5bd}.mr-qm-row.solved{background:#f0fdf4;border-color:#bbf7d0}.mr-qm-row.hard{background:#fff7ed;border-color:#fed7aa}.mr-qm-row.later{background:#f8fafc;border-color:#cbd5e1}.mr-qm-row input{width:16px;height:16px}.mr-qm-num{font-size:12px;color:var(--muted);font-weight:800}.mr-qm-body{display:grid;min-width:0;gap:3px}.mr-qm-body b{font-size:13px}.mr-qm-body small{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mr-history-stats{display:flex;gap:7px;flex-wrap:wrap;margin:10px 0}.mr-history-stats span{font-size:12px;border:1px solid var(--line);background:#f8fafc;border-radius:999px;padding:5px 8px}.mr-history-filters{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.mr-history-filters .btn.active{background:#17191c;color:#fff;border-color:#17191c}.mr-history-list{display:grid;gap:7px;max-height:58vh;overflow:auto;padding-right:3px}.mr-history-row{display:grid;grid-template-columns:34px minmax(0,1fr);gap:9px;padding:9px 10px;border:1px solid var(--line);border-radius:12px;background:#fff}.mr-history-icon{width:30px;height:30px;border-radius:9px;background:#f1f3f5;display:grid;place-items:center;font-weight:900}.mr-history-main{min-width:0}.mr-history-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.mr-history-top span{font-size:11px;color:var(--muted);white-space:nowrap}.mr-completed-timeline{margin-top:6px}.mr-completed-mini{display:grid;gap:5px;margin-top:8px}.mr-completed-mini>div{display:grid;grid-template-columns:22px 44px minmax(0,1fr);gap:7px;align-items:center;font-size:12px}.mr-completed-mini b{font-size:11px;color:var(--muted)}.mr-completed-mini em{font-style:normal;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mr-note-head .actions{margin-left:auto}
@media(max-width:760px){.mr-queue-manager-tools{grid-template-columns:1fr}.mr-qm-row{grid-template-columns:22px 28px minmax(0,1fr)}.mr-qm-row>.pill{display:none}.mr-queue-manager-actions{display:grid;grid-template-columns:1fr 1fr}.mr-queue-manager-actions .btn{width:100%}.mr-history-head,.mr-queue-manager-head{display:block}.mr-history-head .actions{margin-top:8px}.mr-history-list{max-height:62vh}}

/* cumulative WIP — progress analytics */
.mr-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.mr-trend-chart{height:190px;display:flex;align-items:flex-end;gap:10px;padding:10px 2px 0;overflow-x:auto}
.mr-trend-col{min-width:48px;display:grid;grid-template-rows:auto 128px auto;gap:6px;text-align:center;align-items:end}
.mr-trend-col>span{font-size:12px;font-weight:700;color:var(--muted,#6b7280)}
.mr-trend-track{height:128px;width:26px;margin:0 auto;border-radius:10px;background:rgba(127,127,127,.12);display:flex;align-items:flex-end;overflow:hidden}
.mr-trend-track i{display:block;width:100%;background:linear-gradient(180deg,#555,#111);border-radius:10px 10px 4px 4px;min-height:4px}
.mr-trend-col small{font-size:11px;color:var(--muted,#6b7280)}
.mr-tag-cloud{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.mr-report-mini{padding:12px 0;border-bottom:1px solid rgba(127,127,127,.16)}
.mr-report-mini:last-child{border-bottom:0}
.mr-report-mini>div:first-child{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px}
.mr-report-mini>div:first-child span{font-size:12px;color:var(--muted,#6b7280)}
.mr-student-report{margin:12px 0;padding:12px 14px;border-radius:14px;background:rgba(127,127,127,.08);display:grid;gap:8px}
.mr-student-report b{font-weight:700}
.mr-student-insights{display:grid;gap:8px;margin-top:14px}
.good{color:#14804a!important}
.warn{color:#a16207!important}
.pill.good{background:rgba(20,128,74,.10);color:#14804a!important}
.pill.warn{background:rgba(161,98,7,.10);color:#a16207!important}
@media(max-width:760px){.mr-trend-chart{height:168px}.mr-trend-col{grid-template-rows:auto 108px auto}.mr-trend-track{height:108px}.mr-trend-col{min-width:42px}}

/* CUMULATIVE WIP — goals, lesson plan, parent reports */
.mr-goals-overview{margin-top:16px}.mr-goal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mr-goal-card{border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fff;display:grid;gap:7px}.mr-goal-card.completed{opacity:.72}.mr-goal-title{display:flex;align-items:center;justify-content:space-between;gap:8px}.mr-goal-title .pill{white-space:nowrap}.mr-goal-progress{height:8px;border-radius:999px;background:#eceff2;overflow:hidden}.mr-goal-progress i{display:block;height:100%;background:#17191c;border-radius:999px}.mr-goal-list{display:grid;gap:8px;margin-top:12px}.mr-goal-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:13px;padding:11px 12px}.mr-goal-row.completed{background:#f6fbf8}.mr-goal-row.paused{background:#fafafa}.mr-checkline{display:flex;align-items:center;gap:8px;min-height:44px;padding-top:23px}.mr-goal-picker{display:grid;gap:7px}.mr-goal-picker label{display:grid;grid-template-columns:22px minmax(0,1fr) auto;gap:7px;align-items:center;border:1px solid var(--line);border-radius:11px;padding:8px 10px}.mr-goal-picker small{color:var(--muted)}
.mr-plan-empty{display:flex;align-items:center;justify-content:space-between;gap:10px;border:1px dashed var(--line);border-radius:13px;padding:9px 12px;background:#fff}.mr-plan-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:11px 12px}.mr-plan-objectives{display:grid;gap:3px;font-size:12px;color:var(--muted);margin:7px 0 10px}.mr-agenda{display:flex;gap:7px;flex-wrap:wrap}.mr-agenda label{display:grid;grid-template-columns:18px minmax(0,1fr) auto;gap:6px;align-items:center;border:1px solid var(--line);border-radius:999px;padding:6px 9px;font-size:12px;background:#fafafa}.mr-agenda label.done{text-decoration:line-through;opacity:.62}.mr-agenda small{color:var(--muted);white-space:nowrap}
.mr-parent-metrics{display:flex;gap:7px;flex-wrap:wrap;margin:10px 0 12px}.mr-parent-metrics span{border:1px solid var(--line);border-radius:999px;padding:6px 9px;font-size:12px;background:#f8fafc}.mr-saved-parent-reports{display:grid;gap:6px}.mr-saved-parent-reports>div{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:7px 0}.mr-saved-parent-reports span{font-size:12px;color:var(--muted)}.mr-student-goals{margin-bottom:16px}
@media(max-width:760px){.mr-goal-grid{grid-template-columns:1fr}.mr-goal-row{grid-template-columns:1fr}.mr-checkline{padding-top:0}.mr-plan-empty{align-items:flex-start;flex-direction:column}.mr-agenda{display:grid}.mr-agenda label{border-radius:11px}.mr-card-head{align-items:flex-start;flex-direction:column}.mr-card-head>.actions{width:100%;display:grid;grid-template-columns:1fr 1fr}.mr-card-head>.actions .btn{width:100%}}


/* CUMULATIVE WIP — smart preparation, deadlines and spaced review */
.mr-smart-prep{margin-top:16px}.mr-smart-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:10px 0}.mr-smart-metrics>span{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fafafa;display:grid;gap:2px}.mr-smart-metrics b{font-size:22px}.mr-smart-metrics small{color:var(--muted);font-size:11px}.mr-review-mini{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.mr-smart-task-list{display:grid;gap:7px;max-height:52vh;overflow:auto;margin:10px 0;padding-right:3px}.mr-smart-task{display:grid;grid-template-columns:22px minmax(0,1fr) auto;gap:9px;align-items:start;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff;cursor:pointer}.mr-smart-task:hover{border-color:#aeb5bd}.mr-smart-task>span:nth-child(2){display:grid;gap:3px}.mr-smart-task small{color:var(--muted)}.mr-smart-task em{font-style:normal;font-size:12px;line-height:1.45}.mr-review-list{display:grid;gap:7px}.mr-review-row{display:grid;grid-template-columns:minmax(0,1fr) 150px auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px}.mr-review-row>div:first-child{display:grid;gap:3px}.mr-review-row small{color:var(--muted)}.mr-review-mastery{display:grid;grid-template-columns:42px 1fr;gap:7px;align-items:center}.mr-review-mastery>span{font-size:12px;font-weight:800}.mr-homework-watch{margin-top:16px}.mr-homework-watch-list{display:grid;gap:6px}.mr-homework-watch-list>div{display:grid;grid-template-columns:auto 120px minmax(0,1fr) auto;gap:8px;align-items:center;border-top:1px solid var(--line);padding:8px 0}.mr-homework-watch-list>div:first-child{border-top:0}.mr-homework-watch-list small{color:var(--muted);white-space:nowrap}.mr-student-review{margin-bottom:16px}
@media(max-width:760px){.mr-smart-metrics{grid-template-columns:1fr 1fr}.mr-smart-task{grid-template-columns:22px minmax(0,1fr)}.mr-smart-task>.pill{display:none}.mr-review-row{grid-template-columns:1fr}.mr-homework-watch-list>div{grid-template-columns:auto 1fr}.mr-homework-watch-list>div>span:nth-child(3),.mr-homework-watch-list small{grid-column:1/-1}.mr-smart-prep .mr-card-head>.actions{grid-template-columns:1fr}.mr-smart-prep .mr-card-head>.actions .btn{width:100%}}


/* CUMULATIVE WIP — homework review workflow */
.assignment-metrics{margin-bottom:2px}.assignment-filterbar{flex-wrap:wrap}.mr-review-answer{display:grid;gap:10px}.mr-review-answer-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.mr-review-answer-head select{width:auto;min-width:112px}.mr-review-actions{position:sticky;bottom:0;background:linear-gradient(180deg,rgba(255,255,255,.75),#fff 28%);padding:12px 0 2px;z-index:2}.mr-attempt-list{display:grid;gap:6px}.mr-attempt-list>div{display:grid;grid-template-columns:110px minmax(0,1fr) auto;gap:10px;padding:8px 0;border-top:1px solid var(--line);align-items:center}.mr-attempt-list>div:first-child{border-top:0}.assignment-student-meta{margin:6px 0 10px}.notice.warn{border-color:#efd4aa;background:#fff8eb}.mr-review-row em{font-style:normal;font-size:11px;color:var(--muted)}.mr-review-due{display:grid;gap:6px;justify-items:end}.btn.xs{padding:5px 7px;font-size:11px;border-radius:8px}.mr-review-row .actions{gap:4px;flex-wrap:nowrap}
@media(max-width:760px){.mr-review-answer-head{display:grid}.mr-review-answer-head select{width:100%}.mr-attempt-list>div{grid-template-columns:1fr}.mr-review-due{justify-items:start}.mr-review-row .actions{flex-wrap:wrap}.assignment-filterbar .btn{flex:1 1 auto}}


/* CUMULATIVE WIP — student activity journal + course mastery map */
.mr-mastery-overview,.mr-activity-overview{margin-top:16px}
.mr-mastery-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:10px 0 12px}.mr-mastery-summary>span{border:1px solid var(--line);border-radius:12px;background:#fafafa;padding:10px;display:grid;gap:2px}.mr-mastery-summary b{font-size:21px}.mr-mastery-summary small{font-size:11px;color:var(--muted)}
.mr-mastery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.mr-mastery-grid.compact{grid-template-columns:repeat(3,minmax(0,1fr))}.mr-mastery-tile{appearance:none;width:100%;text-align:left;border:1px solid var(--line);border-radius:13px;background:#fff;padding:11px;display:grid;gap:7px;color:inherit}.mr-mastery-tile:hover{border-color:#aeb5bd}.mr-mastery-tile.attention{background:#fffaf2}.mr-mastery-tile.working{background:#fffdf7}.mr-mastery-tile.mastered{background:#f5fbf7}.mr-mastery-tile.no_data{background:#fafafa;opacity:.78}.mr-mastery-tile-head,.mr-mastery-foot{display:flex;align-items:center;justify-content:space-between;gap:7px}.mr-mastery-tile-head span,.mr-mastery-foot small{font-size:11px;color:var(--muted)}.mr-mastery-tile-head b{font-size:20px}.mr-mastery-tile strong{font-size:13px;line-height:1.3}.mr-mastery-bar{height:6px;border-radius:999px;background:#eceff2;overflow:hidden}.mr-mastery-bar i{display:block;height:100%;background:#17191c;border-radius:999px}.mr-mastery-trend{font-size:10px;font-weight:800;white-space:nowrap}.mr-mastery-filters,.mr-activity-filters{margin:10px 0 14px;flex-wrap:wrap}.mr-mastery-section{margin-top:17px}.mr-mastery-section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.mr-mastery-section-head h3{margin:0}.mr-mastery-section-head span{font-size:12px;color:var(--muted)}
.mr-mastery-detail-score{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:14px;padding:14px;margin:12px 0}.mr-mastery-detail-score>b{font-size:38px}.mr-mastery-detail-score>div{display:grid;gap:3px}.mr-mastery-detail-score small{color:var(--muted)}.mr-mastery-components{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0}.mr-mastery-component{border:1px solid var(--line);border-radius:12px;padding:10px;display:grid;gap:3px}.mr-mastery-component span,.mr-mastery-component small{font-size:11px;color:var(--muted)}.mr-mastery-component b{font-size:20px}
.mr-activity-list{display:grid;gap:0}.mr-activity-item{display:grid;grid-template-columns:32px minmax(0,1fr) auto;gap:9px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}.mr-activity-item:first-child{border-top:0}.mr-activity-icon{width:28px;height:28px;display:grid;place-items:center;border-radius:9px;background:#f1f3f5;font-weight:800}.mr-activity-item>div{display:grid;gap:2px}.mr-activity-item b{font-size:13px}.mr-activity-item small,.mr-activity-item time{font-size:11px;color:var(--muted)}.mr-master-student-meta{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 12px}.mr-master-student-meta span{border:1px solid var(--line);border-radius:999px;padding:6px 9px;font-size:12px}.mr-student-mastery,.mr-student-activity{margin-bottom:16px}
@media(max-width:900px){.mr-mastery-grid,.mr-mastery-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}.mr-mastery-components{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.mr-mastery-summary{grid-template-columns:1fr 1fr}.mr-mastery-grid,.mr-mastery-grid.compact{grid-template-columns:1fr}.mr-activity-item{grid-template-columns:32px minmax(0,1fr)}.mr-activity-item time{grid-column:2}.mr-mastery-detail-score{align-items:flex-start}.mr-mastery-components{grid-template-columns:1fr 1fr}.mr-mastery-filters .btn,.mr-activity-filters .btn{flex:1 1 auto}}

/* CUMULATIVE WIP — teacher preparation center + 4-lesson roadmap */
.mr-prep-center,.mr-roadmap-overview{margin-top:16px}
.mr-prep-center-list{display:grid;gap:8px;margin-top:10px}.mr-prep-center-list.compact{gap:6px}
.mr-prep-lesson{display:grid;grid-template-columns:115px minmax(0,1fr) auto;gap:11px;align-items:center;border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fff}.mr-prep-lesson>div:nth-child(2){display:grid;gap:4px}.mr-prep-lesson small{color:var(--muted)}.mr-prep-time{font-size:12px;font-weight:800;color:#373d45}
.mr-alert-chips{display:flex;gap:5px;flex-wrap:wrap}.pill.danger{background:#fff1f1;border-color:#efb6b6;color:#9f1e1e}.pill.good{background:#f2faf5;border-color:#b9dcc6;color:#21603a}
.mr-prep-compact-row{appearance:none;width:100%;border:0;border-top:1px solid var(--line);background:transparent;display:grid;grid-template-columns:115px 135px minmax(0,1fr) 12px;gap:8px;align-items:center;padding:9px 2px;text-align:left;color:inherit;cursor:pointer}.mr-prep-compact-row:first-child{border-top:0}.mr-prep-compact-row span{font-size:11px;color:var(--muted)}.mr-prep-compact-row b{font-size:12px}.mr-prep-compact-row em{font-style:normal;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mr-prep-compact-row i{width:10px;height:10px;border-radius:999px;background:#d97706}.mr-prep-compact-row i.ready{background:#2d7a4a}
.mr-prep-columns{display:grid;grid-template-columns:1.2fr 1fr;gap:14px;margin:12px 0}.mr-prep-columns section{border:1px solid var(--line);border-radius:14px;padding:12px}.mr-prep-columns h3{margin:0 0 10px}
.mr-attention-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:8px;align-items:start;border-top:1px solid var(--line);padding:9px 0}.mr-attention-row:first-child{border-top:0}.mr-attention-row>div{display:grid;gap:2px}.mr-attention-row small{color:var(--muted);font-size:11px}.mr-attention-row.critical b{color:#8f1f1f}.mr-attention-row.warn b{color:#7f4b08}
.mr-prep-checklist{display:grid;gap:6px}.mr-prep-checklist label{display:grid;grid-template-columns:20px minmax(0,1fr) auto;gap:8px;align-items:center;border:1px solid var(--line);border-radius:11px;padding:9px 10px}.mr-prep-checklist label.auto{background:#fafafa}.mr-prep-checklist small{color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.06em}.mr-prep-actions{margin-top:12px;flex-wrap:wrap}
.mr-roadmap-grid,.mr-roadmap-mini{display:grid;gap:10px;margin:12px 0}.mr-roadmap-grid{grid-template-columns:1fr 1fr}.mr-roadmap-mini{grid-template-columns:repeat(4,minmax(0,1fr))}.mr-roadmap-slot{position:relative;border:1px solid var(--line);border-radius:14px;padding:12px 12px 12px 42px;background:#fff;min-width:0}.mr-roadmap-index{position:absolute;left:10px;top:11px;width:24px;height:24px;border-radius:8px;background:#17191c;color:#fff;display:grid;place-items:center;font-size:11px;font-weight:800}.mr-roadmap-slot-body{display:grid;gap:8px;min-width:0}.mr-roadmap-head{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}.mr-roadmap-head b{font-size:13px}.mr-roadmap-head .pill{white-space:nowrap}.mr-roadmap-slot .field{margin:0}.mr-roadmap-slot input,.mr-roadmap-slot textarea{font-size:12px}.mr-roadmap-slot p{margin:0;font-size:12px;line-height:1.45}.mr-roadmap-slot>small,.mr-roadmap-slot-body>small{font-size:11px;color:var(--muted);line-height:1.4}
@media(max-width:900px){.mr-roadmap-mini{grid-template-columns:1fr 1fr}.mr-roadmap-grid{grid-template-columns:1fr}.mr-prep-columns{grid-template-columns:1fr}}
@media(max-width:650px){.mr-prep-lesson{grid-template-columns:1fr}.mr-prep-lesson>.btn{width:100%}.mr-prep-compact-row{grid-template-columns:1fr auto}.mr-prep-compact-row span,.mr-prep-compact-row em{grid-column:1/-1}.mr-roadmap-mini{grid-template-columns:1fr}.mr-attention-row{grid-template-columns:1fr}.mr-attention-row>.btn{justify-self:start}.mr-prep-actions{display:grid;grid-template-columns:1fr}.mr-prep-actions .btn{width:100%}}
.mr-attention-overview{margin-top:16px}.mr-attention-profile-list{display:grid;gap:0}.mr-attention-profile-list .mr-attention-row{padding:10px 0}


/* CUMULATIVE WIP — diagnostics, readiness and longitudinal progress */
.mr-learning-intelligence,.mr-student-snapshots{margin-top:16px}.mr-intelligence-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0}.mr-intelligence-grid>div{border:1px solid var(--line);border-radius:12px;padding:11px;background:#fafafa;display:grid;gap:3px}.mr-intelligence-grid small{font-size:11px;color:var(--muted)}.mr-intelligence-grid b{font-size:22px}.mr-intelligence-grid span{font-size:11px;color:var(--muted)}.mr-intelligence-focus{border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:grid;gap:3px}.mr-intelligence-focus span{font-size:12px;color:var(--muted)}
.mr-snapshot-chart{height:170px;display:flex;align-items:stretch;gap:7px;border:1px solid var(--line);border-radius:14px;padding:12px;overflow-x:auto;margin:12px 0}.mr-snapshot-col{min-width:42px;display:grid;grid-template-rows:22px 1fr 18px;gap:4px;text-align:center}.mr-snapshot-col>span,.mr-snapshot-col>small{font-size:10px;color:var(--muted)}.mr-snapshot-col>div{height:100%;min-height:85px;border-radius:7px;background:#f0f2f4;display:flex;align-items:flex-end;overflow:hidden}.mr-snapshot-col i{display:block;width:100%;background:#17191c;border-radius:7px 7px 0 0}.mr-compare-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0}.mr-compare-metrics>span{display:grid;gap:3px;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fafafa}.mr-compare-metrics small{font-size:10px;color:var(--muted)}.mr-compare-metrics b{font-size:18px}.mr-topic-diff-list{display:grid;gap:0;border:1px solid var(--line);border-radius:12px;padding:0 10px}.mr-topic-diff-list>div{display:grid;grid-template-columns:minmax(0,1fr) 90px 110px;gap:8px;align-items:center;padding:9px 0;border-top:1px solid var(--line)}.mr-topic-diff-list>div:first-child{border-top:0}.mr-topic-diff-list span:first-child{display:grid}.mr-topic-diff-list small{color:var(--muted);font-size:10px}.mr-topic-diff-list em{text-align:center;font-style:normal;font-weight:800;font-size:11px}
.mr-readiness-list,.mr-diagnostic-list{display:grid;gap:9px;margin-top:12px}.mr-readiness-card{border:1px solid var(--line);border-radius:14px;padding:12px;display:grid;gap:9px}.mr-readiness-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.mr-readiness-head h3{margin:5px 0 0}.mr-readiness-head>b{font-size:28px}.mr-readiness-bar{height:8px;border-radius:999px;background:#eceff2;position:relative}.mr-readiness-bar i{display:block;height:100%;border-radius:999px;background:#17191c}.mr-readiness-bar mark{position:absolute;top:-4px;width:2px;height:16px;background:#b66b00}.mr-readiness-meta{display:flex;gap:6px;flex-wrap:wrap}.mr-readiness-meta span{font-size:10px;border:1px solid var(--line);border-radius:999px;padding:4px 7px;color:var(--muted)}.mr-target-topic-list{display:grid;grid-template-columns:1fr 1fr;gap:6px;max-height:320px;overflow:auto}.mr-target-topic-list label{display:grid;grid-template-columns:20px minmax(0,1fr);gap:7px;border:1px solid var(--line);border-radius:10px;padding:8px;align-items:start}.mr-target-topic-list label>span{display:grid;gap:2px}.mr-target-topic-list small{font-size:10px;color:var(--muted)}
.mr-diagnostic-row{appearance:none;width:100%;border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;align-items:center;text-align:left;color:inherit}.mr-diagnostic-row:hover{border-color:#aeb5bd}.mr-diagnostic-row>span{display:grid;gap:3px}.mr-diagnostic-row small{font-size:11px;color:var(--muted)}
@media(max-width:760px){.mr-intelligence-grid{grid-template-columns:1fr}.mr-compare-metrics{grid-template-columns:1fr 1fr}.mr-target-topic-list{grid-template-columns:1fr}.mr-topic-diff-list>div{grid-template-columns:1fr auto}.mr-topic-diff-list>div>span:last-child{grid-column:1/-1}.mr-learning-intelligence .mr-card-head>.actions{display:grid;grid-template-columns:1fr}.mr-learning-intelligence .mr-card-head>.actions .btn{width:100%}}

/* CUMULATIVE WIP 12 — target-date learning trajectory */
.mr-target-trajectory{display:grid;gap:10px}.mr-target-overview{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.mr-target-overview>span{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fafbfc;display:grid;gap:2px}.mr-target-overview b{font-size:20px}.mr-target-overview small{font-size:10px;color:var(--muted)}
.mr-target-gap-pills{display:flex;gap:6px;flex-wrap:wrap}.mr-target-tempo{display:flex;align-items:center;justify-content:space-between;gap:10px;border:1px solid var(--line);border-radius:12px;padding:9px 11px;background:#fafbfc}.mr-target-tempo span{font-size:11px;color:var(--muted)}.mr-target-tempo.ahead{background:#f0fdf4;border-color:#bbf7d0}.mr-target-tempo.behind{background:#fff7ed;border-color:#fed7aa}
.mr-target-layout{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);gap:12px;margin-top:12px}.mr-target-layout section{border:1px solid var(--line);border-radius:14px;padding:11px;background:#fff}.mr-target-layout h3,.mr-target-gaps h3{margin:0 0 9px}.mr-target-priority-list{display:grid;gap:6px;max-height:52vh;overflow:auto}.mr-target-priority-list>div{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;border-bottom:1px solid #eef0f2;padding:7px 2px}.mr-target-priority-list>div:last-child{border-bottom:0}.mr-target-priority-list span{display:grid;gap:2px}.mr-target-priority-list small{font-size:10px;color:var(--muted)}.mr-target-priority-list em{font-style:normal;font-weight:800}
.mr-target-slots{display:grid;gap:8px;max-height:52vh;overflow:auto;padding-right:2px}.mr-target-slot{display:grid;grid-template-columns:34px minmax(0,1fr);gap:9px;border:1px solid var(--line);border-radius:12px;padding:9px;background:#fafbfc}.mr-target-slot p{margin:4px 0 7px}.mr-target-slot small{display:block;margin-top:6px;color:var(--muted)}.mr-target-slot-head{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}.mr-target-gaps{margin:12px 0;border:1px solid #fed7aa;background:#fff7ed;border-radius:12px;padding:10px}.mr-target-gaps p{margin:5px 0;font-size:12px}
@media(max-width:800px){.mr-target-overview{grid-template-columns:1fr 1fr}.mr-target-layout{grid-template-columns:1fr}.mr-target-tempo{align-items:flex-start;flex-direction:column}.mr-target-slots,.mr-target-priority-list{max-height:none}}

/* cumulative-wip-13 — schedule / calendar */
.mr-schedule-legacy{display:none!important}
.mr-schedule-enhanced{display:grid;gap:16px;margin-top:14px}
.mr-schedule-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px}
.mr-schedule-toolbar h2,.mr-week-load-card h2,.mr-schedule-create h2{margin:0}
.mr-schedule-toolbar p{margin:4px 0 0}
.mr-schedule-metrics{margin:0}
.mr-week-load-card .mr-card-head{gap:18px;align-items:flex-start}
.mr-week-load-card select{min-width:170px}
.mr-inline-check{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);white-space:nowrap}
.mr-inline-check input{width:auto}
.mr-week-load{display:grid;gap:8px;margin-top:12px}
.mr-week-load-day{display:grid;grid-template-columns:42px 1fr 74px;gap:10px;align-items:center;font-size:12px}
.mr-week-load-day>span{text-transform:capitalize;color:var(--muted)}
.mr-week-load-day>div{height:7px;border-radius:999px;background:#eef0f2;overflow:hidden}
.mr-week-load-day i{display:block;height:100%;border-radius:inherit;background:currentColor;min-width:0}
.mr-week-load-day b{text-align:right;font-size:12px}
.mr-schedule-form{display:grid;grid-template-columns:1.1fr 1.3fr 1.2fr .65fr .8fr .75fr auto;gap:10px;align-items:end}
.mr-schedule-form .field{margin:0}
.mr-calendar-week{display:grid;grid-template-columns:repeat(7,minmax(170px,1fr));gap:10px;overflow-x:auto;padding-bottom:4px}
.mr-calendar-day{min-height:310px;border:1px solid var(--line);border-radius:16px;background:#f7f8f9;overflow:hidden;transition:.15s border-color,.15s transform,.15s background}
.mr-calendar-day.today{border-color:#1f2937;box-shadow:0 0 0 1px #1f293718}
.mr-calendar-day.drop-target{border-color:#111;background:#eef4ff;transform:translateY(-2px)}
.mr-calendar-day>header{display:flex;align-items:baseline;gap:6px;padding:11px 12px;border-bottom:1px solid var(--line);background:#fff}
.mr-calendar-day>header span{text-transform:capitalize;font-size:12px;color:var(--muted)}
.mr-calendar-day>header b{font-size:20px;margin-left:auto}.mr-calendar-day>header small{font-size:11px;color:var(--muted)}
.mr-calendar-day-body{padding:8px;display:grid;gap:8px}
.mr-calendar-empty{padding:22px 8px;text-align:center;color:var(--muted);font-size:12px;border:1px dashed var(--line);border-radius:12px}
.mr-calendar-lesson{display:grid;gap:6px;padding:10px;border-radius:13px;background:#fff;border:1px solid var(--line);box-shadow:0 3px 12px #00000008;cursor:default}
.mr-calendar-lesson[draggable="true"]{cursor:grab}.mr-calendar-lesson.dragging{opacity:.45}
.mr-calendar-lesson.cancelled{opacity:.62;background:#fafafa}.mr-calendar-lesson.cancelled strong,.mr-calendar-lesson.cancelled .mr-calendar-topic{text-decoration:line-through}
.mr-calendar-lesson.completed{background:#f7fbf8}
.mr-calendar-lesson-top{display:flex;align-items:center;justify-content:space-between;gap:6px}.mr-calendar-lesson-top>b{font-size:12px}
.mr-calendar-lesson>strong{font-size:14px}.mr-calendar-topic{font-size:12px;color:var(--muted);line-height:1.35}
.mr-calendar-tags{display:flex;gap:5px;flex-wrap:wrap}.mr-calendar-tags .pill{font-size:10px;padding:3px 6px}
.mr-calendar-note{line-height:1.35;color:var(--muted)}.mr-calendar-actions{display:flex;gap:5px;flex-wrap:wrap;margin-top:3px}.mr-calendar-actions .btn{padding:5px 7px;font-size:11px}
.mr-schedule-tip{padding:0 3px 8px}
@media(max-width:1180px){.mr-schedule-form{grid-template-columns:repeat(3,1fr)}.mr-schedule-form>.btn{height:42px}.mr-calendar-week{grid-template-columns:repeat(7,minmax(190px,1fr))}}
@media(max-width:700px){.mr-schedule-toolbar,.mr-week-load-card .mr-card-head{align-items:flex-start;flex-direction:column}.mr-schedule-form{grid-template-columns:1fr 1fr}.mr-schedule-form>.btn{grid-column:1/-1}.mr-calendar-week{grid-template-columns:repeat(7,minmax(230px,78vw))}.mr-schedule-metrics{grid-template-columns:1fr 1fr!important}.mr-week-load-day{grid-template-columns:36px 1fr 66px}}



/* CUMULATIVE WIP — teacher workday, reminders, attendance and workload */
.mr-workday{margin-bottom:16px}.mr-ops-metrics>div:not(.card){border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fafafa;display:grid;gap:2px}.mr-ops-metrics small{color:var(--muted);font-size:11px}.mr-ops-metrics b{font-size:24px;line-height:1.1}.mr-ops-metrics span{font-size:11px;color:var(--muted)}
.mr-next-lesson{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:12px 0;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff}.mr-next-lesson h3{margin:5px 0 2px}.mr-next-lesson p{margin:0;color:var(--muted);font-size:13px}
.mr-reminder-list{display:grid;gap:7px}.mr-reminder{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:9px;align-items:center;border-top:1px solid var(--line);padding:8px 0}.mr-reminder:first-child{border-top:0}.mr-reminder>span{width:28px;height:28px;border-radius:9px;background:#f1f3f5;display:grid;place-items:center;font-weight:900}.mr-reminder.high>span{background:#fff1f2}.mr-reminder>div{display:grid;gap:2px}.mr-reminder small{color:var(--muted)}
.mr-attendance-choice{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0}.mr-attendance-profile{margin-top:16px}
.mr-workload-chart{height:230px;display:flex;align-items:flex-end;gap:10px;overflow-x:auto;padding:18px 2px 8px;margin:8px 0 12px}.mr-workload-col{min-width:50px;display:grid;grid-template-rows:22px 155px 18px;gap:5px;text-align:center}.mr-workload-col>span,.mr-workload-col small{font-size:11px;color:var(--muted)}.mr-workload-col>div{position:relative;height:155px;border-radius:10px;background:#f3f4f6;overflow:hidden}.mr-workload-col i,.mr-workload-col em{position:absolute;left:7px;right:7px;bottom:0;border-radius:7px 7px 2px 2px}.mr-workload-col i{background:#17191c;z-index:2}.mr-workload-col em{border:2px solid #9ca3af;background:transparent;z-index:1;box-sizing:border-box}.mr-calendar-tags .pill.bad{background:#fff1f2;color:#b42318}.pill.bad{background:#fff1f2;color:#b42318!important}
@media(max-width:760px){.mr-workday .mr-card-head>.actions{grid-template-columns:1fr}.mr-next-lesson{align-items:flex-start;flex-direction:column}.mr-next-lesson .actions{width:100%;display:grid;grid-template-columns:1fr 1fr}.mr-attendance-choice{grid-template-columns:1fr 1fr}.mr-reminder{grid-template-columns:28px minmax(0,1fr)}.mr-reminder>.btn{grid-column:2}.mr-ops-metrics{grid-template-columns:1fr 1fr!important}.mr-workload-chart{height:205px}.mr-workload-col{grid-template-rows:22px 130px 18px}.mr-workload-col>div{height:130px}}

/* cumulative-wip-15 — student communication, resources and lesson check-ins */
.mr-comms-dashboard,.mr-student-comms,.mr-student-communication-panel{margin-top:16px}.mr-comms-dashboard .grid,.mr-student-comms .grid{gap:10px}.mr-comms-mini{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fafbfc;display:grid;gap:7px}.mr-comms-mini>b{font-size:28px;line-height:1}.mr-comms-mini>span{font-size:11px;color:var(--muted)}.mr-comms-mini>button{border:0;border-top:1px solid var(--line);background:transparent;padding:8px 0;text-align:left;display:grid;gap:2px;cursor:pointer;color:inherit}.mr-comms-mini>button strong{font-size:12px}.mr-comms-mini>button small{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mr-question-list,.mr-resource-list,.mr-my-questions,.mr-student-resources{display:grid;gap:10px;margin-top:12px}.mr-question{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fff}.mr-question.resolved{opacity:.68;background:#fafafa}.mr-question-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.mr-question-head>div{display:grid;gap:2px}.mr-question-head small{color:var(--muted)}.mr-question-text{white-space:pre-wrap;line-height:1.5;margin:10px 0 12px}.mr-resource-form{margin:12px 0}.mr-resource-row{border:1px solid var(--line);border-radius:13px;padding:11px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.mr-resource-row>div:first-child{display:grid;gap:5px}.mr-resource-row small,.mr-resource-row p{color:var(--muted);margin:0}.mr-resource-row a{font-size:12px;overflow-wrap:anywhere}.mr-resource-row.muted-row{opacity:.62}.mr-comms-stats>div{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fafbfc;display:grid;gap:2px}.mr-comms-stats small{color:var(--muted);font-size:11px}.mr-comms-stats b{font-size:22px}.mr-checkin-strip{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.mr-checkin-callout{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}.mr-checkin-callout h2{margin:5px 0 3px}.mr-checkin-callout p{margin:0;color:var(--muted)}.mr-my-question{border-bottom:1px solid var(--line);padding:9px 0;display:grid;gap:7px}.mr-my-question:last-child{border-bottom:0}.mr-my-question>.actions{justify-content:space-between}.mr-student-resources article{border:1px solid var(--line);border-radius:12px;padding:10px;display:grid;gap:7px}.mr-student-resources article.pinned{background:#f8fafc;border-color:#cbd5e1}.mr-student-resources p{margin:0;color:var(--muted)}.mr-confidence-buttons{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:14px 0}.mr-confidence-buttons label input{display:none}.mr-confidence-buttons label span{border:1px solid var(--line);border-radius:12px;padding:12px 8px;display:grid;gap:3px;text-align:center;cursor:pointer;background:#fff}.mr-confidence-buttons label input:checked+span{border-color:#111;background:#f3f4f6;box-shadow:0 0 0 1px #111}.mr-confidence-buttons small{font-size:10px;color:var(--muted)}
@media(max-width:760px){.mr-resource-row{grid-template-columns:1fr}.mr-resource-row>.actions{justify-content:flex-start}.mr-checkin-callout{align-items:flex-start;flex-direction:column}.mr-checkin-callout .btn{width:100%}.mr-confidence-buttons{grid-template-columns:1fr 1fr}.mr-confidence-buttons label:last-child{grid-column:1/-1}.mr-student-communication-panel>.grid{grid-template-columns:1fr!important}.mr-comms-dashboard>.grid{grid-template-columns:1fr!important}}

/* cumulative-wip-16 — student Today workspace + device self-check */
.mr-student-today{display:grid;gap:16px}.mr-today-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(260px,.65fr);gap:18px;align-items:stretch;overflow:hidden}.mr-today-hero h2{font-size:30px;line-height:1.08;margin:9px 0 8px;max-width:720px}.mr-today-hero p{margin:0 0 14px;color:var(--muted);line-height:1.5}.mr-today-next{border:1px solid var(--line);border-radius:16px;padding:14px;background:#fafbfc;display:grid;gap:6px;align-content:center}.mr-today-next small,.mr-today-metrics small{color:var(--muted);font-size:11px}.mr-today-next b{font-size:18px}.mr-today-next span{font-size:12px;color:var(--muted);line-height:1.4}.mr-today-next .btn{margin-top:5px;justify-self:start}.mr-today-metrics{gap:10px}.mr-today-metrics .card{padding:12px;display:grid;gap:2px}.mr-today-metrics b{font-size:27px;line-height:1.05}.mr-today-metrics span{font-size:11px;color:var(--muted)}.mr-today-grid{gap:16px}.mr-today-actions{display:grid;gap:7px;margin-top:10px}.mr-today-actions>button{width:100%;border:1px solid var(--line);border-radius:13px;background:#fff;padding:10px;display:grid;grid-template-columns:30px minmax(0,1fr) auto;gap:9px;align-items:center;text-align:left;color:inherit;cursor:pointer}.mr-today-actions>button:hover{border-color:#9ca3af;background:#fafafa}.mr-today-actions>button.warn{background:#fffaf2}.mr-today-actions>button>span{width:30px;height:30px;border-radius:10px;background:#f1f3f5;display:grid;place-items:center;font-size:12px;font-weight:900}.mr-today-actions>button>div{display:grid;gap:2px}.mr-today-actions small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.mr-today-actions b{font-size:13px}.mr-today-actions em{font-style:normal;color:var(--muted);font-size:11px}.mr-today-actions strong{font-size:18px}.mr-week-plan{display:grid;gap:8px;margin-top:10px}.mr-week-plan>div{display:grid;grid-template-columns:92px minmax(0,1fr) auto;gap:10px;align-items:center;padding:9px 0;border-top:1px solid var(--line)}.mr-week-plan>div:first-child{border-top:0}.mr-week-plan span{font-size:11px;color:var(--muted);text-transform:capitalize}.mr-week-plan b{font-size:13px}.mr-week-plan small{font-size:11px;color:var(--muted);white-space:nowrap}.mr-week-plan .mr-week-goal{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fafbfc}.mr-today-report{display:grid;gap:10px;margin-top:10px}.mr-today-report>div{border-left:3px solid #d1d5db;padding:2px 0 2px 11px}.mr-today-report span{font-size:11px;color:var(--muted);font-weight:800}.mr-today-report p{margin:4px 0 0;line-height:1.5}.mr-today-resources{display:grid;gap:8px;margin-top:10px}.mr-today-resources article{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center;border-top:1px solid var(--line);padding:8px 0}.mr-today-resources article:first-child{border-top:0}.mr-today-resources article>div{display:grid;gap:4px}.mr-today-resources small{color:var(--muted);line-height:1.4}.mr-today-calm{display:flex;align-items:center;justify-content:space-between;gap:16px}.mr-today-calm>div{display:flex;align-items:flex-start;gap:12px}.mr-today-calm>div>span{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#f1f3f5;font-weight:900}.mr-today-calm h3{margin:0 0 4px;font-size:15px}.mr-today-calm p{margin:0;color:var(--muted);font-size:12px;line-height:1.45}
.mr-device-check-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:14px;margin:14px 0}.mr-device-preview{min-height:300px;border-radius:16px;background:#111;display:grid;place-items:center;overflow:hidden;position:relative}.mr-device-preview video{width:100%;height:100%;min-height:300px;object-fit:cover;transform:scaleX(-1)}.mr-device-empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:#fff;padding:24px;background:#111}.mr-device-empty[hidden]{display:none}.mr-device-status{display:grid;gap:12px;align-content:start}.mr-device-status>div{display:grid;gap:4px}.mr-device-status small{color:var(--muted);font-size:11px}.mr-device-status b{font-size:13px;overflow-wrap:anywhere}.mr-device-status span{font-size:12px;line-height:1.45}.mr-mic-meter{height:9px;border-radius:999px;background:#eceff2;overflow:hidden}.mr-mic-meter i{display:block;width:0;height:100%;background:#17191c;border-radius:inherit;transition:width .08s linear}
@media(max-width:760px){.mr-today-hero{grid-template-columns:1fr}.mr-today-hero h2{font-size:24px}.mr-today-metrics{grid-template-columns:1fr 1fr!important}.mr-today-grid{grid-template-columns:1fr!important}.mr-week-plan>div{grid-template-columns:82px minmax(0,1fr)}.mr-week-plan small{grid-column:2;white-space:normal}.mr-today-calm{align-items:flex-start;flex-direction:column}.mr-today-calm .btn{width:100%}.mr-device-check-grid{grid-template-columns:1fr}.mr-device-preview,.mr-device-preview video{min-height:220px}.student-top .tabs{flex-wrap:wrap}}

/* cumulative-wip-17 — pre-lesson readiness + live countdown */
.mr-live-countdown{display:inline-flex;align-items:center;min-height:28px;width:max-content;padding:6px 10px;border-radius:999px;background:#17191c;color:#fff;font-size:12px;font-weight:850;letter-spacing:.01em}.mr-next-lesson-ready{gap:18px}.mr-next-main{display:grid;gap:5px;min-width:0}.mr-next-main>.actions{justify-content:flex-start;flex-wrap:wrap}.mr-next-main h3{margin:2px 0 0}.mr-next-main p{margin:0}.mr-next-actions{justify-content:flex-end;flex-wrap:wrap}
.mr-preflight{display:grid;gap:14px;overflow:hidden}.mr-preflight .mr-card-head{align-items:center}.mr-preflight .mr-card-head h2{margin:6px 0 3px}.mr-preflight-countdown{min-width:145px;border:1px solid var(--line);border-radius:14px;padding:10px 12px;background:#fafbfc;display:grid;gap:3px;text-align:right}.mr-preflight-countdown small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.mr-preflight-countdown b{font-size:17px}.mr-preflight-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.mr-preflight-steps>button{appearance:none;border:1px solid var(--line);border-radius:15px;padding:12px;background:#fff;color:inherit;display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:9px;align-items:center;text-align:left;cursor:pointer;min-width:0}.mr-preflight-steps>button:hover{border-color:#9ca3af;background:#fafafa}.mr-preflight-steps>button.warn{background:#fffaf2}.mr-preflight-steps>button.done{background:#f8faf9}.mr-preflight-steps>button>span{width:34px;height:34px;border-radius:11px;background:#f1f3f5;display:grid;place-items:center;font-weight:900}.mr-preflight-steps>button>div{display:grid;gap:3px;min-width:0}.mr-preflight-steps small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.mr-preflight-steps b{font-size:13px;overflow:hidden;text-overflow:ellipsis}.mr-preflight-steps em{font-style:normal;color:var(--muted);font-size:11px;line-height:1.35}.mr-preflight-steps strong{font-size:18px}.mr-preflight-steps .pill{justify-self:start;font-size:10px;padding:4px 7px}
@media(max-width:760px){.mr-next-lesson-ready{align-items:flex-start}.mr-next-actions{width:100%;display:grid!important;grid-template-columns:1fr 1fr}.mr-next-actions .btn:first-child{grid-column:1/-1}.mr-preflight .mr-card-head{align-items:flex-start;flex-direction:column}.mr-preflight-countdown{width:100%;text-align:left;box-sizing:border-box}.mr-preflight-steps{grid-template-columns:1fr}.mr-preflight-steps>button{grid-template-columns:34px minmax(0,1fr) auto}}

/* cumulative-wip-18 — post-lesson closure + student reflection */
.mr-after-lesson{display:grid;gap:12px}.mr-after-list{display:grid;gap:8px}.mr-after-list article{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:11px 12px;background:#fff}.mr-after-main{display:grid;gap:5px;min-width:0}.mr-after-main>small{color:var(--muted);font-size:10px}.mr-after-main>b{font-size:14px}.mr-after-main>.actions{justify-content:flex-start;flex-wrap:wrap}.mr-after-list article>.actions{justify-content:flex-end;flex-wrap:wrap}.mr-wrap-status{margin:12px 0}.mr-wrap-status>div{border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fafbfc;display:grid;gap:4px}.mr-wrap-status small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.mr-wrap-status b{font-size:13px}.mr-wrap-homeworks{border:1px solid var(--line);border-radius:14px;padding:12px;margin:10px 0;display:grid;gap:7px}.mr-wrap-homeworks>div{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;padding-top:7px;border-top:1px solid var(--line)}.mr-wrap-homeworks span{font-size:12px;font-weight:750}.mr-wrap-homeworks small{font-size:11px;color:var(--muted);white-space:nowrap}.mr-wrap-actions{flex-wrap:wrap;margin-top:12px}
.mr-postlesson-student{display:grid;gap:12px;border-color:#d9e8df;background:linear-gradient(180deg,#fff 0%,#fbfdfc 100%)}.mr-postlesson-student .mr-card-head{align-items:center}.mr-postlesson-student .mr-card-head h2{margin:6px 0 3px}.mr-post-confidence{width:54px;height:54px;border-radius:18px;background:#17191c;color:#fff;display:grid;place-items:center;font-weight:900;font-size:16px}.mr-postlesson-body{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.mr-postlesson-body>div{border:1px solid var(--line);border-radius:13px;padding:11px;background:#fff}.mr-postlesson-body>div.student-note{background:#faf7ff}.mr-postlesson-body small{font-size:10px;color:var(--muted);font-weight:850;text-transform:uppercase;letter-spacing:.04em}.mr-postlesson-body p{margin:5px 0 0;font-size:12px;line-height:1.48}
@media(max-width:760px){.mr-after-list article{grid-template-columns:1fr}.mr-after-list article>.actions{justify-content:stretch;display:grid;grid-template-columns:1fr 1fr}.mr-after-list article>.actions .btn{width:100%}.mr-wrap-status{grid-template-columns:1fr!important}.mr-wrap-homeworks>div{grid-template-columns:1fr}.mr-wrap-homeworks small{white-space:normal}.mr-wrap-actions{display:grid!important;grid-template-columns:1fr 1fr}.mr-wrap-actions .btn{width:100%}.mr-wrap-actions .btn:first-child{grid-column:1/-1}.mr-postlesson-student .mr-card-head{align-items:flex-start;gap:10px}.mr-postlesson-body{grid-template-columns:1fr}.mr-postlesson-student .mr-card-head>.btn{width:100%}}

/* cumulative-wip-19 — teacher action center + global quick jump */
.mr-topbar-tools{align-items:center}.mr-topbar-tools kbd,.mr-quick-search kbd{font:10px/1 ui-monospace,SFMono-Regular,Menlo,monospace;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:4px 6px;background:#f8f9fa;color:var(--muted)}
.mr-action-center{display:grid;gap:14px;border-color:#dfe3e8;background:linear-gradient(180deg,#fff 0%,#fcfcfd 100%)}.mr-action-center .mr-card-head h2{margin:7px 0 3px}.mr-action-metrics{gap:9px}.mr-action-metrics>div{border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fff;display:grid;gap:2px}.mr-action-metrics small{font-size:10px;color:var(--muted);font-weight:850;text-transform:uppercase;letter-spacing:.04em}.mr-action-metrics b{font-size:24px;line-height:1}.mr-action-metrics span{font-size:11px;color:var(--muted)}.mr-action-list{display:grid;gap:7px}.mr-action-row{display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:13px;padding:10px 11px;background:#fff}.mr-action-row.urgent{border-color:#ead8c2;background:#fffdf9}.mr-action-icon{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:#f1f3f5;font-weight:900}.mr-action-row.urgent .mr-action-icon{background:#fff1dc}.mr-action-row>div{display:grid;gap:2px;min-width:0}.mr-action-row small{font-size:9px;color:var(--muted);font-weight:850;text-transform:uppercase;letter-spacing:.05em}.mr-action-row b{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mr-action-row em{font-style:normal;color:var(--muted);font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mr-action-more{text-align:center}
.mr-quickjump{display:grid;gap:12px}.mr-quick-search{display:grid;grid-template-columns:24px minmax(0,1fr) auto;gap:8px;align-items:center;border:1px solid #bfc5cc;border-radius:14px;padding:7px 9px 7px 12px;background:#fff;box-shadow:0 6px 28px #0000000a}.mr-quick-search>span{font-size:21px;color:var(--muted)}.mr-quick-search input{border:0!important;outline:0!important;box-shadow:none!important;padding:8px 4px!important;font-size:16px;background:transparent}.mr-quick-results{display:grid;gap:5px;max-height:min(58vh,540px);overflow:auto}.mr-quick-result{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:10px;align-items:center;border:1px solid transparent;border-radius:12px;background:transparent;padding:9px 10px;text-align:left;color:inherit;cursor:pointer}.mr-quick-result:hover,.mr-quick-result.active{background:#f4f5f7;border-color:#e1e4e8}.mr-quick-result>span{width:32px;height:32px;border-radius:10px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;font-size:11px;font-weight:900}.mr-quick-result>div{display:grid;gap:1px;min-width:0}.mr-quick-result small{font-size:9px;color:var(--muted);font-weight:850;text-transform:uppercase;letter-spacing:.05em}.mr-quick-result b{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mr-quick-result em{font-size:11px;color:var(--muted);font-style:normal;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mr-quick-result strong{font-size:16px}.mr-quick-hint{text-align:center}
@media(max-width:760px){.mr-topbar-tools{width:100%}.mr-topbar-tools .btn{width:100%;justify-content:center}.mr-topbar-tools kbd{display:none}.mr-action-metrics{grid-template-columns:1fr 1fr!important}.mr-action-metrics>div:last-child{grid-column:1/-1}.mr-action-row{grid-template-columns:34px minmax(0,1fr)}.mr-action-row>.btn{grid-column:1/-1;width:100%}.mr-action-row b,.mr-action-row em{white-space:normal}.mr-quick-result b,.mr-quick-result em{white-space:normal}}

/* cumulative-wip-20 — student schedule-change requests + teacher confirmation */
.mr-student-schedule-requests,.mr-teacher-schedule-requests{display:grid;gap:12px}.mr-student-request-list,.mr-teacher-request-list{display:grid;gap:8px}.mr-student-request-list article,.mr-teacher-request-list article{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:11px 12px;background:#fff}.mr-student-request-list article>div,.mr-teacher-request-list article>div{display:grid;gap:4px;min-width:0}.mr-student-request-list small,.mr-teacher-request-list small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-weight:800}.mr-student-request-list b,.mr-teacher-request-list b{font-size:13px}.mr-student-request-list em,.mr-teacher-request-list em{font-style:normal;color:var(--muted);font-size:11px;line-height:1.4}.mr-teacher-request-list span{font-size:11px;color:var(--muted)}
.mr-student-schedule-today{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fbfcff}.mr-student-schedule-today>div{display:grid;grid-template-columns:38px minmax(0,1fr);gap:10px;align-items:center}.mr-student-schedule-today>div>div{display:grid;gap:3px}.mr-student-schedule-today small{font-size:10px;color:var(--muted);font-weight:850;text-transform:uppercase;letter-spacing:.04em}.mr-student-schedule-today b{font-size:14px}.mr-student-schedule-today p{margin:0;color:var(--muted);font-size:12px}.mr-schedule-change-icon{width:38px;height:38px;border-radius:12px;background:#eef2ff;display:grid;place-items:center;font-weight:900;font-size:18px}
.mr-request-kind{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}.mr-request-kind label{cursor:pointer}.mr-request-kind input{position:absolute;opacity:0;pointer-events:none}.mr-request-kind span{display:grid;gap:3px;border:1px solid var(--line);border-radius:14px;padding:12px;background:#fff}.mr-request-kind input:checked+span{border-color:#17191c;box-shadow:0 0 0 2px #17191c0f}.mr-request-kind b{font-size:13px}.mr-request-kind small{font-size:11px;color:var(--muted)}.mr-request-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:12px 0}.mr-request-summary>div{border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fafbfc;display:grid;gap:4px}.mr-request-summary small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-weight:800}.mr-request-summary b{font-size:13px}.mr-request-summary p{margin:0;font-size:12px;line-height:1.45}.mr-teacher-schedule-requests{border-color:#eadfce;background:#fffdf9}
@media(max-width:760px){.mr-student-request-list article,.mr-teacher-request-list article{grid-template-columns:1fr}.mr-student-request-list article>.actions,.mr-teacher-request-list article>.btn{width:100%}.mr-student-request-list article>.actions .btn,.mr-teacher-request-list article>.btn{width:100%}.mr-student-schedule-today{align-items:flex-start;flex-direction:column}.mr-student-schedule-today>.btn{width:100%}.mr-request-kind,.mr-request-summary{grid-template-columns:1fr}}
.mr-request-decisions{display:grid;gap:6px;border-top:1px solid var(--line);padding-top:10px}.mr-request-decisions>small{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:850}.mr-request-decisions>div{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 8px;align-items:center;padding:7px 0}.mr-request-decisions>div b{font-size:12px}.mr-request-decisions>div em{grid-column:2;font-size:11px;color:var(--muted);font-style:normal}

/* cumulative-wip-21 — lesson-first workflow + board parity */
.board-mode-switch{align-items:center;flex-wrap:wrap}
.mr-delete-schedule-options{display:grid;gap:10px;margin-top:14px}
.mr-delete-schedule-options .btn{justify-content:center}
.mr-calendar-actions .btn.danger{margin-left:auto}
@media(max-width:650px){
  .board-mode-switch{align-items:stretch}
  .board-mode-switch .search{width:100%!important}
  .mr-calendar-actions .btn.danger{margin-left:0}
}


/* cumulative-wip-22-major — lesson-first workspace, pro board & resilient video */
.board-pdf-thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;max-height:58vh;overflow:auto;padding:4px}.board-pdf-thumb{border:1px solid var(--line);border-radius:12px;padding:8px;background:#fafafa;display:grid;gap:6px;cursor:pointer;position:relative}.board-pdf-thumb:has(input:checked){border-color:#111;background:#fff;box-shadow:0 0 0 1px #111}.board-pdf-thumb input{position:absolute;top:8px;right:8px}.board-pdf-thumb canvas{width:100%;height:130px;object-fit:contain;background:#fff;border-radius:7px;border:1px solid #eceef0}.board-pdf-thumb b{font-size:11px}.board-crop-preview{display:grid;place-items:center;max-height:42vh;overflow:auto;margin:12px 0;border:1px solid var(--line);border-radius:12px;background:#f4f5f6;padding:12px}.board-crop-preview img{max-width:100%;max-height:38vh;object-fit:contain}.board-template-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:9px;margin:10px 0 18px}.board-template-card{border:1px solid var(--line);border-radius:13px;background:#fafafa;padding:13px;text-align:left;display:grid;gap:5px;cursor:pointer}.board-template-card:hover{background:#fff;border-color:#9ca3af;transform:translateY(-1px)}.board-template-card span{font-size:11px;color:var(--muted);line-height:1.35}.board-toolbar{overflow-x:auto}.board-tools{min-width:max-content}.board-stage svg [data-rotate-handle]{cursor:grab}.board-stage svg [data-resize-handle]{cursor:nwse-resize}

.mr-video-card.floating{position:fixed!important;z-index:1200;top:88px;right:18px;width:min(520px,calc(100vw - 36px));height:auto;min-width:330px;min-height:250px;max-width:92vw;max-height:84vh;resize:both;overflow:auto;box-shadow:0 18px 60px #0003}.mr-video-card.floating .mr-video-head{cursor:move;position:sticky;top:0;background:#fff;z-index:4;padding-bottom:7px}.mr-video-devices{border-top:1px solid var(--line);padding-top:8px}.mr-video-devices summary{cursor:pointer;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:8px}.mr-video-devices select{width:100%;min-width:0}.mr-video-card #mrRecBadge{background:#fff1f2;color:#b42318!important;animation:mrRecPulse 1.2s infinite}.mr-video-card #mrQuality{margin-top:2px}.mr-video-card.floating .mr-video-grid{min-height:190px}.mr-video-card.floating.compact .mr-video-grid{min-height:135px}@keyframes mrRecPulse{50%{opacity:.55}}

.mr-lesson-pro-suite{margin:12px 0;display:grid;gap:14px}.mr-lesson-pro-suite h2,.mr-lesson-pro-suite h3{margin:4px 0}.mr-lesson-pro-grid{align-items:stretch}.mr-lesson-pro-grid>div{border:1px solid var(--line);border-radius:14px;padding:13px;background:#fafafa}.mr-phase-top{display:flex;align-items:flex-end;justify-content:space-between;gap:12px}.mr-phase-top>div{display:grid;gap:3px}.mr-phase-top small{color:var(--muted)}.mr-phase-top b{font-size:18px}.mr-phase-top strong{font-variant-numeric:tabular-nums;font-size:29px;line-height:1}.mr-phase-bar{height:7px;border-radius:999px;background:#e6e8eb;overflow:hidden;margin:12px 0}.mr-phase-bar i{display:block;height:100%;background:#17191c;border-radius:inherit;transition:width .25s}.mr-private-note-title{display:flex;justify-content:space-between;align-items:center;gap:10px}.mr-private-note-title h3{margin:0}.mr-lesson-pro-suite textarea{min-height:122px;resize:vertical}.mr-pro-bottom{border-top:1px solid var(--line);padding-top:10px}.mr-preflight-grid>div{display:grid;gap:4px}.mr-preflight-grid small,.mr-preflight-grid span{color:var(--muted);font-size:11px}.mr-preflight-grid b{font-size:16px}

.mr-command-backdrop{z-index:2000;align-items:flex-start;padding-top:min(15vh,130px)}.mr-command-palette{width:min(650px,94vw);padding:12px}.mr-command-palette .search{width:100%;font-size:17px;padding:13px 14px;margin-bottom:8px}.mr-command-row{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;border:0;background:transparent;border-radius:10px;padding:11px 12px;text-align:left;cursor:pointer;color:inherit}.mr-command-row:hover,.mr-command-row.active{background:#f0f2f4}.mr-command-row kbd{font:11px/1 system-ui;color:var(--muted);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:4px 6px;min-width:22px;text-align:center}

@media(max-width:760px){.board-pdf-thumbs{grid-template-columns:repeat(2,1fr)}.mr-video-card.floating{left:8px!important;right:8px!important;top:70px!important;width:auto!important;min-width:0;max-width:none;height:auto!important;resize:none}.mr-lesson-pro-grid{grid-template-columns:1fr!important}.mr-lesson-pro-suite>.mr-card-head{align-items:flex-start;flex-direction:column}.mr-lesson-pro-suite>.mr-card-head>.actions{display:grid;grid-template-columns:1fr 1fr;width:100%}.mr-lesson-pro-suite>.mr-card-head>.actions .btn:first-child{grid-column:1/-1}.mr-preflight-grid{grid-template-columns:1fr!important}}

/* v23.4 — first-minute UX, mobile tap reliability, non-mirrored camera */
.mr-video-frame.remote video{transform:none!important}#mrLocalVideo[data-mirror-corrected="0"]{transform:none!important}#mrLocalVideo[data-mirror-corrected="1"]{transform:scaleX(-1)!important}
button,.btn,.tabs button,.nav button,[role="button"],summary{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
button,.btn,.tabs button,.nav button{-webkit-user-select:none;user-select:none}
.mr-help-button{position:fixed;right:max(18px,env(safe-area-inset-right));bottom:max(18px,env(safe-area-inset-bottom));z-index:1800;border:1px solid #d8dde3;background:#17191c;color:#fff;border-radius:999px;padding:9px 13px;display:flex;align-items:center;gap:8px;box-shadow:0 12px 38px #0002;font:700 13px/1 system-ui;cursor:pointer;touch-action:manipulation}.mr-help-button>b{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#17191c;font-size:14px}.mr-help-button:hover{transform:translateY(-1px)}
.mr-first-minutes{margin-bottom:16px;overflow:hidden}.mr-first-progress{height:6px;border-radius:999px;background:#eef0f2;overflow:hidden;margin:12px 0}.mr-first-progress>i{display:block;height:100%;border-radius:inherit;background:#17191c;transition:width .25s ease}.mr-first-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.mr-first-step{appearance:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px;display:grid;grid-template-columns:34px minmax(0,1fr);gap:9px;align-items:center;text-align:left;color:inherit;touch-action:manipulation}.mr-first-step:not(.static){cursor:pointer}.mr-first-step:not(.static):hover{border-color:#aeb5bd;background:#fafbfc}.mr-first-step>span{width:32px;height:32px;border-radius:10px;background:#f0f2f4;display:grid;place-items:center;font-weight:900}.mr-first-step>div{display:grid;gap:3px}.mr-first-step b{font-size:13px}.mr-first-step small{font-size:11px;color:var(--muted);line-height:1.35}.mr-first-step.done{background:#f7fbf8}.mr-first-step.done>span{background:#e8f5ec;color:#177245}.mr-student-first-minutes{margin:0 0 14px}
.mr-guide-head h2{margin:7px 0 5px}.mr-guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:14px 0}.mr-guide-grid article{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fafbfc;display:grid;gap:7px;align-content:start}.mr-guide-grid article>b{font-size:14px}.mr-guide-grid article p{font-size:12px;line-height:1.5;color:var(--muted);margin:0}.mr-guide-grid article .btn{justify-self:start}.mr-guide-section{border-top:1px solid var(--line);padding-top:14px;margin-top:14px}.mr-guide-section h3{margin:0 0 9px}.mr-guide-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.mr-guide-steps>span{display:grid;grid-template-columns:27px minmax(0,1fr);gap:7px;align-items:center;font-size:11px;border:1px solid var(--line);border-radius:12px;padding:9px;background:#fff}.mr-guide-steps i{font-style:normal;width:25px;height:25px;border-radius:8px;background:#17191c;color:#fff;display:grid;place-items:center;font-weight:900}.mr-shortcuts{display:flex;gap:8px;flex-wrap:wrap}.mr-shortcuts>span{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fff;font-size:11px}.mr-shortcuts kbd{font:700 10px/1 ui-monospace,SFMono-Regular,Consolas,monospace;background:#f0f2f4;border-radius:5px;padding:3px 5px;margin-right:5px}
.mr-video-coach{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:9px;align-items:center;border:1px solid #dde2e7;border-radius:12px;background:#f8fafc;padding:9px 10px}.mr-video-coach.ok{background:#f4faf6;border-color:#cce7d4}.mr-video-coach.warn{background:#fff9f1;border-color:#f0d5ae}.mr-video-coach-icon{width:26px;height:26px;border-radius:8px;background:#17191c;color:#fff;display:grid;place-items:center;font-weight:900}.mr-video-coach>div{display:grid;gap:2px}.mr-video-coach b{font-size:12px}.mr-video-coach small{font-size:11px;color:var(--muted);line-height:1.35}
@media (pointer:coarse){button,.btn,.tabs button,.nav button{min-height:44px;min-width:44px}.btn.sm{min-height:42px;padding:9px 11px}.icon-btn{width:42px;height:42px}.board-toolbar button,.board-page-tabs button{min-height:44px}.mr-video-actions{gap:9px}.mr-video-actions .btn{min-height:46px;font-size:14px}.mr-help-button{min-width:auto;min-height:48px}.color-dot{width:34px;height:34px;min-width:34px;min-height:34px}select,input,textarea{font-size:16px}}
@media (hover:none) and (pointer:coarse){.mr-help-button:hover{transform:none}.mr-first-step:not(.static):hover{background:#fff;border-color:var(--line)}}
@media(max-width:760px){.mr-first-grid{grid-template-columns:1fr}.mr-guide-grid{grid-template-columns:1fr}.mr-guide-steps{grid-template-columns:1fr 1fr}.mr-help-button{right:10px;bottom:max(10px,env(safe-area-inset-bottom));padding:8px}.mr-help-button>span{display:none}.mr-video-coach{grid-template-columns:28px minmax(0,1fr)}.mr-video-coach>.btn{grid-column:1/-1;justify-self:start}.mr-video-head{align-items:flex-start}.mr-video-head>.actions{justify-content:flex-end}.mr-video-frame.local{right:10px!important;top:68px!important;width:112px!important;height:84px!important}.mr-video-card{padding:10px}.student-home,.student-shell{padding-left:10px!important;padding-right:10px!important}}
@media(max-width:480px){.mr-guide-steps{grid-template-columns:1fr}.mr-video-actions{grid-template-columns:1fr 1fr!important}.mr-video-actions .btn.primary,.mr-video-actions .btn.danger{grid-column:1/-1}}

/* v23.5 video stability + explicit camera orientation */
#mrVideoMirror{white-space:nowrap}
#mrLocalVideo{backface-visibility:hidden;-webkit-backface-visibility:hidden}

/* v26.0 — minimal UI, tactile buttons, cleaner whiteboard */
:root{
  --bg:#f7f7f5;
  --panel:#ffffff;
  --text:#191a1c;
  --muted:#74777d;
  --line:#e7e7e3;
  --accent:#171717;
  --accent2:#f2f2ef;
}
html{background:var(--bg);-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);line-height:1.45;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

/* Consistent, genuinely pressable controls */
button,.btn,.tabs button,.nav button,[role="button"]{
  touch-action:manipulation;
  -webkit-tap-highlight-color:transparent;
}
button:not(:disabled),.btn:not(:disabled),.tabs button:not(:disabled),.nav button:not(:disabled),[role="button"]:not([aria-disabled="true"]){cursor:pointer}
button:disabled,.btn:disabled{cursor:not-allowed;opacity:.46}
.btn,.tabs button,.nav button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  min-height:38px;
  border-color:var(--line);
  border-radius:10px;
  transition:transform .075s ease,background-color .14s ease,border-color .14s ease,box-shadow .14s ease,color .14s ease;
  box-shadow:0 1px 0 rgba(20,20,20,.025);
}
.btn.sm{min-height:34px;padding:7px 10px}
.btn:hover:not(:disabled){background:#f5f5f2;border-color:#d9d9d4}
.btn.primary:hover:not(:disabled){background:#272727;border-color:#272727}
.btn.ghost:hover:not(:disabled){background:#f2f2ef}
button:not(:disabled):active,.btn:not(:disabled):active,.tabs button:not(:disabled):active,.nav button:not(:disabled):active,
button.is-pressed:not(:disabled),.btn.is-pressed:not(:disabled),.tabs button.is-pressed:not(:disabled),.nav button.is-pressed:not(:disabled){
  transform:translateY(1px) scale(.975);
  box-shadow:inset 0 1px 2px rgba(0,0,0,.09);
}
button:focus-visible,.btn:focus-visible,.tabs button:focus-visible,.nav button:focus-visible,[role="button"]:focus-visible{
  outline:2px solid #1f2937;
  outline-offset:2px;
}

/* Quieter layout: less visual noise, more whitespace */
.layout{grid-template-columns:218px minmax(0,1fr)}
.sidebar{padding:20px 14px;gap:18px;background:#fbfbfa;border-color:var(--line)}
.content{padding:24px;max-width:1440px}
.topbar{margin-bottom:20px;align-items:center}
.topbar h1{font-size:28px;letter-spacing:-.035em}
.card,.form-card,.row,.video-card,.mr-video-card,.board-card,.item-box{
  border-color:var(--line);
  box-shadow:none;
}
.card,.form-card{border-radius:14px}
.row{border-radius:12px;padding:12px 14px}
.section-title{margin:20px 0 10px}
.pill{background:#f1f1ee;color:#55585d}
.notice{background:#f3f3f0;color:#53565b}
.field input,.field select,.field textarea,.search,.profile-edit input,.profile-edit select{
  border-color:#deded9;
  border-radius:10px;
  background:#fff;
  transition:border-color .14s ease,box-shadow .14s ease,background-color .14s ease;
}
.field input:focus,.field textarea:focus,.field select:focus,.search:focus,.profile-edit input:focus,.profile-edit select:focus{
  border-color:#a8a8a2;
  box-shadow:0 0 0 3px rgba(20,20,20,.055);
}
.modal-backdrop{background:rgba(20,20,20,.30);backdrop-filter:blur(2px)}
.modal{border:1px solid var(--line);border-radius:16px;box-shadow:0 22px 70px rgba(0,0,0,.16)}
.nav{gap:3px}.nav button{justify-content:flex-start;min-height:38px;border-radius:9px;padding:9px 11px}
.nav button.active,.nav button:hover{background:#eeeeeb;color:#111}

/* Whiteboard: compact chrome, more room for the actual lesson */
.board-card{border-radius:14px;background:#fff}
.board-toolbar{gap:6px;padding:8px 10px;background:#fbfbfa;border-color:var(--line);scrollbar-width:thin;overscroll-behavior-x:contain}
.board-tools{gap:5px}
.board-toolbar .btn{background:#fff}
.board-toolbar .btn.active{background:#171717!important;color:#fff!important;border-color:#171717!important}
.board-toolbar .btn:hover:not(:disabled){background:#f2f2ef}
.board-toolbar .btn.active:hover:not(:disabled){background:#252525!important}
.board-select{min-height:34px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--text)}
.board-hint{padding:6px 10px;background:#fff;color:#85878c}
.board-stage{background:#fff;isolation:isolate}
.board-stage svg{shape-rendering:geometricPrecision;image-rendering:auto}
.color-dot{box-shadow:0 0 0 1px rgba(0,0,0,.08);transition:transform .08s ease,outline-color .12s ease}
.color-dot:active,.color-dot.is-pressed{transform:scale(.88)}
.board-page-tabs{scrollbar-width:thin}
.board-floating{box-shadow:0 8px 24px rgba(0,0,0,.08)!important;border-color:var(--line)!important}

/* Small screens: controls remain easy to hit without consuming the whole board */
@media(max-width:760px){
  .content{padding:14px 10px 20px}
  .topbar h1{font-size:25px}
  .card,.form-card{padding:14px}
  .board-toolbar{padding:7px 8px;overflow-x:auto;overflow-y:hidden}
  .board-tools{width:max-content!important;min-width:max-content!important;flex-wrap:nowrap!important;padding-bottom:2px}
  .board-tools .btn,.board-tools .board-select{flex:0 0 auto;white-space:nowrap}
  .board-hint{display:none}
}
@media(pointer:coarse){
  button,.btn,.tabs button,.nav button{min-height:44px}
  .btn.sm{min-height:42px}
  .board-tools .btn,.board-tools .board-select{min-height:44px}
  .color-dot{width:38px;height:38px;min-width:38px;min-height:38px}
}
@media(prefers-reduced-motion:reduce){
  button,.btn,.tabs button,.nav button,.color-dot{transition:none!important}
}

/* v26.1 — grouped whiteboard, compact lesson workspace, improved media */
.board-tool-groups{display:flex;align-items:center;gap:6px;flex-wrap:wrap;position:relative;width:100%}
.board-quick-tools{display:flex;gap:5px;align-items:center}
.board-tool-group{position:relative}
.board-tool-group>summary{list-style:none;display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:7px 10px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:13px;font-weight:700;cursor:pointer;user-select:none}
.board-tool-group>summary::-webkit-details-marker{display:none}
.board-tool-group[open]>summary{background:#171717;color:#fff;border-color:#171717}
.board-tool-popover{position:absolute;left:0;top:calc(100% + 7px);z-index:90;min-width:240px;max-width:min(430px,calc(100vw - 28px));padding:9px;display:flex;gap:6px;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 14px 40px rgba(0,0,0,.12)}
.board-tool-row{display:flex;align-items:center;gap:7px;width:100%;padding-top:5px;border-top:1px solid var(--line)}
.board-tool-popover .board-select{flex:1;min-width:105px}
.board-tool-popover .btn{background:#fff}
.board-tool-group .color-dot{width:26px;height:26px;min-width:26px;min-height:26px}
.board-toolbar{overflow:visible}
.board-stage{cursor:crosshair}

/* Make the lesson board the visual center and tuck secondary controls away. */
.lesson-cloud-layout{grid-template-columns:1fr!important;gap:10px!important}
.mr-lesson-board-main{order:1;min-width:0}
.mr-lesson-materials-drawer{order:2;border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.mr-lesson-materials-drawer>summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 13px;cursor:pointer;background:#fafafa}
.mr-lesson-materials-drawer>summary::-webkit-details-marker{display:none}
.mr-lesson-materials-drawer>summary>span:first-child{display:grid;gap:2px}
.mr-lesson-materials-drawer>summary small{color:var(--muted);font-weight:400}
.mr-lesson-materials-drawer>.lesson-cloud-material{max-height:55vh!important;padding:12px;overflow:auto}
.mr-lesson-control-compact{padding:12px!important;border-radius:12px!important}
.mr-lesson-control-compact .lesson-live-top{margin-bottom:8px}
.mr-lesson-control-compact .lesson-current-task{padding:10px!important}
.mr-lesson-control-compact .lesson-task-prompt{max-height:115px;overflow:auto}
.mr-lesson-control-compact .lesson-queue{margin-top:8px}
.mr-lesson-top-actions{align-items:center;gap:7px!important}
.mr-lesson-top-more{position:relative}
.mr-lesson-top-more>summary{list-style:none}
.mr-lesson-top-more>summary::-webkit-details-marker{display:none}
.mr-lesson-top-more-pop{position:absolute;right:0;top:calc(100% + 6px);z-index:80;min-width:190px;padding:7px;display:grid;gap:6px;background:#fff;border:1px solid var(--line);border-radius:11px;box-shadow:0 12px 36px rgba(0,0,0,.12)}
.mr-lesson-top-more-pop .btn{width:100%}
.mr-lesson-tools-drawer,.mr-pro-drawer{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.mr-lesson-tools-drawer>summary,.mr-pro-drawer>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;cursor:pointer;background:#fafafa}
.mr-lesson-tools-drawer>summary::-webkit-details-marker,.mr-pro-drawer>summary::-webkit-details-marker{display:none}
.mr-lesson-tools-drawer>summary span,.mr-pro-drawer>summary>span{display:grid;gap:2px}
.mr-lesson-tools-drawer>summary small,.mr-pro-drawer>summary small{color:var(--muted);font-weight:400}
.mr-lesson-tools-drawer .mr-addon-toolbar{border:0;border-top:1px solid var(--line);border-radius:0;background:#fff}
.mr-lesson-tools-drawer #mrLessonPlanMount{padding:0 12px 12px}
.mr-pro-drawer-body{padding:12px;border-top:1px solid var(--line);display:grid;gap:12px}
.mr-lesson-pro-suite{margin:8px 0!important}
.mr-board-companion{margin-bottom:6px!important}
.mr-board-companion.collapsed{position:static!important}

/* Media: larger view on demand, screen-share preview, clear sound state. */
.mr-native-call .mr-call-actions{align-items:center}
.mr-native-call .mr-call-actions .btn{white-space:nowrap}
.mr-native-call.expanded .mr-call-actions{position:sticky;bottom:0;padding:8px 0 2px;background:linear-gradient(transparent,#fff 28%)}
.mr-native-call.sharing .mr-call-stage::after{content:'Ваш экран транслируется';position:absolute;right:10px;bottom:10px;background:#111c;color:#fff;border-radius:8px;padding:4px 7px;font-size:10px;pointer-events:none}
.mr-native-call .mr-local-video:hover{outline:2px solid rgba(255,255,255,.75);outline-offset:1px}

@media(max-width:760px){
  .board-tool-groups{flex-wrap:nowrap;overflow-x:auto;overflow-y:visible;padding-bottom:2px}
  .board-tool-group,.board-quick-tools{flex:0 0 auto}
  .board-tool-popover{position:fixed;left:10px;right:10px;top:auto;bottom:12px;max-width:none;min-width:0;z-index:2200;box-shadow:0 16px 50px rgba(0,0,0,.22)}
  .mr-lesson-top-actions{display:flex!important;flex-wrap:wrap}
  .mr-lesson-top-actions #completeLesson{margin-left:auto}
  .mr-lesson-materials-drawer>.lesson-cloud-material{max-height:62vh!important}
  .mr-lesson-tools-drawer>summary,.mr-pro-drawer>summary{align-items:flex-start}
}


/* v26.2 — Kotomatika visual language + calmer workspace */
:root{
  --koto-orange:#ED591A;
  --koto-orange-bright:#FF6A00;
  --koto-black:#000000;
  --koto-gray:#DBDBDB;
  --koto-white:#FFFFFF;
  --bg:#f4f4f1;
  --panel:#fff;
  --text:#11110f;
  --muted:#74736f;
  --line:#deded9;
  --accent:#ED591A;
  --accent2:#fff1e9;
}
body{background:
  radial-gradient(circle at 88% 3%,rgba(255,106,0,.075),transparent 240px),
  linear-gradient(180deg,#f7f7f4 0,#f2f2ef 100%);}
.brand,.topbar h1,.section-title h2,.card>h2,.form-card>h2,.modal h2{
  font-family:"Unbounded",Inter,ui-sans-serif,system-ui,sans-serif;
}
.brand{display:flex;align-items:center;gap:8px;color:var(--koto-orange);font-size:20px;letter-spacing:-.045em;text-transform:uppercase}
.brand::after{content:"";width:9px;height:9px;border-radius:50%;background:var(--koto-orange);box-shadow:14px 0 0 rgba(237,89,26,.2)}
.cloud-badge{font-family:Inter,ui-sans-serif,system-ui,sans-serif;text-transform:none;letter-spacing:0!important;background:#fff1e9!important;color:#b93f0c!important;border:1px solid #ffd7c1}
.sidebar{background:rgba(255,255,255,.94);border-right-color:#d9d9d4;box-shadow:7px 0 30px rgba(0,0,0,.025)}
.sidebar::before{content:"";position:absolute;left:16px;right:16px;top:68px;height:3px;border-radius:999px;background:linear-gradient(90deg,var(--koto-orange) 0 42%,var(--koto-black) 42% 70%,transparent 70%);opacity:.95}
.sidebar .nav{margin-top:12px}
.nav button{font-weight:700;color:#62615d;border:1px solid transparent;transition:background .16s ease,color .16s ease,border-color .16s ease,transform .12s ease}
.nav button:hover{background:#f5f5f1;border-color:#e5e5df;color:#111}
.nav button.active{background:#111!important;color:#fff!important;border-color:#111!important;box-shadow:inset 4px 0 0 var(--koto-orange)}
.topbar{position:relative;padding-bottom:13px;border-bottom:1px solid var(--line)}
.topbar::after{content:"";position:absolute;left:0;bottom:-2px;width:76px;height:3px;border-radius:999px;background:var(--koto-orange)}
.topbar h1{font-size:27px;line-height:1.12;letter-spacing:-.055em}
.topbar p{max-width:760px}
.card,.form-card,.row,.video-card,.mr-video-card,.board-card,.item-box,.mr-lesson-materials-drawer,.mr-lesson-tools-drawer,.mr-pro-drawer{
  border-color:#deded9;
  box-shadow:0 6px 24px rgba(0,0,0,.025);
}
.card,.form-card{position:relative;overflow:hidden}
.card::before,.form-card::before{content:"";position:absolute;left:0;top:0;width:42px;height:4px;background:var(--koto-orange);border-radius:0 0 6px 0}
.metric{color:var(--koto-orange);font-family:"Unbounded",Inter,system-ui,sans-serif;letter-spacing:-.06em}
.btn.primary{background:var(--koto-orange)!important;border-color:var(--koto-orange)!important;color:#fff!important;box-shadow:0 5px 14px rgba(237,89,26,.14)}
.btn.primary:hover:not(:disabled){background:var(--koto-orange-bright)!important;border-color:var(--koto-orange-bright)!important}
.btn.primary:active:not(:disabled){box-shadow:0 1px 4px rgba(237,89,26,.16)!important}
.btn.danger{color:#9f2f12;border-color:#eccabd;background:#fffaf7}
.btn.danger:hover:not(:disabled){background:#fff0e8;border-color:#e8a98f}
.tabs button.active{background:#111!important;border-color:#111!important;color:#fff!important;box-shadow:inset 0 -3px 0 var(--koto-orange)}
.pill{background:#eeeeea;color:#4f4e4a}
.koto-pill{background:#fff0e7;color:#b74310;border:1px solid #ffd7c1}
.koto-eyebrow{display:inline-block;margin-bottom:5px;color:var(--koto-orange);font:700 10px/1.2 "Unbounded",Inter,sans-serif;letter-spacing:.12em}
.notice{background:#f5f5f1;color:#54534f;border:1px solid #e7e7e1}
.empty{background:#fff;border-color:#d8d8d2}
.field input:focus,.field textarea:focus,.field select:focus,.search:focus{border-color:var(--koto-orange);box-shadow:0 0 0 3px rgba(237,89,26,.10)}

/* Whiteboard stays neutral; orange is only an interaction/accent color. */
.board-card{box-shadow:0 12px 36px rgba(0,0,0,.045)}
.board-toolbar{background:#fafaf7;border-bottom-color:#deded9}
.board-page-tabs{background:#fffdfb!important;border-bottom-color:#e1e1dc!important}
.board-page-tabs .btn.primary{background:#111!important;border-color:#111!important;box-shadow:inset 0 -3px 0 var(--koto-orange)!important}
.board-tool-group>summary{border-color:#deded9;background:#fff;font-weight:750}
.board-tool-group>summary:hover{border-color:#c8c8c2;background:#fafaf7}
.board-tool-group[open]>summary{background:var(--koto-orange)!important;color:#fff!important;border-color:var(--koto-orange)!important}
.board-toolbar .btn.active{background:var(--koto-orange)!important;color:#fff!important;border-color:var(--koto-orange)!important}
.board-toolbar .btn.active:hover:not(:disabled){background:var(--koto-orange-bright)!important}
.board-tool-popover{border-color:#d9d9d4;box-shadow:0 18px 48px rgba(0,0,0,.13)}
.board-hint{color:#8a8984}
.board-floating{border-color:#deded9!important;box-shadow:0 10px 30px rgba(0,0,0,.08)!important}

/* History cleanup */
.history-tools{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:14px;padding:18px 20px}
.history-tools h2{margin:2px 0 5px}
.history-tools p{margin:0}
.history-row{border-left:4px solid transparent}
.history-row:hover{border-left-color:var(--koto-orange);background:#fffdfb}

/* Small Kotomatika-style signature details without clutter. */
.auth-card{position:relative;overflow:hidden;border-color:#d9d9d4}
.auth-card::before{content:"";position:absolute;width:150px;height:65px;border:5px solid var(--koto-orange);border-left-color:transparent;border-bottom-color:transparent;border-radius:50%;right:-58px;top:-31px;transform:rotate(-8deg);opacity:.95}
.auth-card::after{content:"";position:absolute;width:86px;height:35px;border-top:4px solid #111;border-radius:50%;left:24px;bottom:11px;transform:rotate(6deg);pointer-events:none}
.student-lesson{border-left-color:var(--koto-orange)!important}
.progress-fill,.mr-phase-bar i,.mr-first-progress>i{background:var(--koto-orange)!important}
.mr-help-button{background:#111;border-color:#111}.mr-help-button>b{color:var(--koto-orange)}

@media(max-width:900px){
  .sidebar::before{display:none}.sidebar .nav{margin-top:0}.history-tools{align-items:flex-start;flex-direction:column}.history-tools .btn{width:100%;justify-content:center}
  .topbar h1{font-size:23px}
}

/* Mathroom v26.3 — geometry workspace */
.board-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 11px;border-bottom:1px solid var(--line);background:#fffdfb}
.board-head-title{display:flex;align-items:center;gap:10px;min-width:0}.board-head-title strong{font-family:'Unbounded',Arial,sans-serif;font-size:13px;letter-spacing:-.02em}.board-head .board-status{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.board-head #fullscreen{margin-left:auto;white-space:nowrap;border-color:#d7d7d1}.board-head #fullscreen:hover{border-color:var(--koto-orange);color:var(--koto-orange)}
.board-shapes-popover{min-width:min(520px,calc(100vw - 28px));align-items:flex-start}.board-shapes-popover>.board-select{min-width:220px;flex:1 1 220px}.board-shapes-popover .board-tool-row{flex-wrap:wrap}.board-tool-help{width:100%;margin:3px 2px 0;color:var(--muted);font-size:11px;line-height:1.45}
.board-card:fullscreen .board-head{flex:0 0 auto;padding:10px 14px}.board-card:fullscreen .board-page-tabs,.board-card:fullscreen .board-toolbar,.board-card:fullscreen .board-hint{flex:0 0 auto}.board-card:fullscreen .board-stage{height:auto!important;flex:1 1 auto;min-height:0}
@media(max-width:650px){.board-head{padding:8px}.board-head-title strong{font-size:12px}.board-head .board-status{display:none}.board-head #fullscreen{min-height:38px!important}.board-shapes-popover>.board-select{min-width:0;width:100%!important;flex-basis:100%}.board-shapes-popover .board-tool-row{display:grid;grid-template-columns:1fr;width:100%}.board-shapes-popover .board-tool-row .btn{width:100%}}

/* Mathroom v26.5 — stable board sidebar + easier tapping */
.board-stage{position:relative;overflow:hidden;min-height:560px}
.board-toolbar-side{
  position:absolute!important;
  left:10px;
  top:10px;
  z-index:140;
  width:156px;
  max-height:calc(100% - 20px);
  display:flex;
  flex-direction:column;
  padding:10px!important;
  border:1px solid rgba(210,210,204,.96)!important;
  border-radius:16px;
  background:rgba(255,255,252,.96)!important;
  box-shadow:0 12px 34px rgba(0,0,0,.10);
  backdrop-filter:blur(10px);
  overflow-y:auto!important;
  overflow-x:visible!important;
  overscroll-behavior:contain;
  scrollbar-width:thin;
}
.board-toolbar-side .board-tool-groups{display:flex!important;flex-direction:column;align-items:stretch!important;gap:8px!important;width:100%!important;overflow:visible!important;padding:0!important}
.board-side-label{padding:2px 4px 4px;color:#9a9892;font:700 8px/1.15 'Unbounded',Inter,sans-serif;letter-spacing:.12em}
.board-toolbar-side .board-quick-tools{display:grid!important;grid-template-columns:1fr 1fr;gap:6px!important;width:100%}
.board-toolbar-side .board-quick-tools .btn{width:100%;min-width:0;min-height:42px;padding:8px 6px;font-size:12px;justify-content:center}
.board-toolbar-side .board-quick-tools .board-icon-btn{font-size:18px;padding:6px}
.board-toolbar-side .board-quick-tools [data-tool="select"],.board-toolbar-side .board-quick-tools [data-tool="hand"]{grid-column:span 2}
.board-toolbar-side .board-tool-group{position:relative;width:100%;flex:0 0 auto!important}
.board-toolbar-side .board-tool-group>summary{width:100%;min-height:48px;padding:10px 12px;display:flex;align-items:center;justify-content:flex-start;border-radius:12px;font-size:14px;font-weight:700;white-space:nowrap}
.board-toolbar-side .board-tool-group[open]>summary{box-shadow:0 4px 12px rgba(237,89,26,.16)}
.board-toolbar-side .board-tool-popover{
  position:absolute!important;
  left:calc(100% + 12px)!important;
  right:auto!important;
  top:0!important;
  bottom:auto!important;
  min-width:316px;
  max-width:min(560px,calc(100vw - 230px));
  max-height:min(72vh,640px);
  overflow:auto;
  padding:12px;
  z-index:160;
  border-radius:16px;
}
.board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{top:auto!important;bottom:0!important}
.board-toolbar-side .board-shapes-popover{min-width:min(560px,calc(100vw - 230px))}
.board-popover-title{width:100%;padding:1px 2px 8px;margin-bottom:2px;border-bottom:1px solid #ecece7;color:#77756f;font:700 10px/1.2 'Unbounded',Inter,sans-serif;letter-spacing:.04em}
.board-toolbar-side .board-tool-popover>.btn,
.board-toolbar-side .board-tool-popover>.board-select{width:100%;min-height:44px;text-align:left;justify-content:flex-start}
.board-toolbar-side .board-tool-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;width:100%;padding-top:8px;border-top:1px solid var(--line)}
.board-toolbar-side .board-tool-row .btn{width:100%;min-height:42px;justify-content:flex-start}
.board-toolbar-side .board-tool-row .color-dot{justify-self:start}
.board-toolbar-side .board-shapes-popover>.board-select{min-width:0;flex:1 1 100%}
.board-toolbar-side .board-shapes-popover .board-tool-row{grid-template-columns:repeat(2,minmax(0,1fr))}
.board-toolbar-side .board-tool-help{font-size:11px;line-height:1.5;margin-top:2px}
.board-stage .board-floating{z-index:70}
.board-stage>svg{position:absolute;inset:0;width:100%;height:100%;touch-action:none}.board-loading-card{display:grid;place-items:center;min-height:220px}
.board-hint{border-top:1px solid var(--line);border-bottom:0}
.board-card:fullscreen .board-toolbar-side{top:12px;left:12px;max-height:calc(100% - 24px)}
.board-card:fullscreen .board-stage{min-height:0}

/* Protractor / 3D controls are intentionally neutral so the geometry remains readable. */
.board-toolbar-side #solidReset{border-color:#d8d8d2;background:#fafaf7}
.board-toolbar-side #solidClear{margin-left:0}

@media(max-width:980px){
  .board-toolbar-side{width:142px}
  .board-toolbar-side .board-tool-group>summary{font-size:13px}
  .board-toolbar-side .board-tool-popover{min-width:292px;max-width:min(500px,calc(100vw - 210px))}
}

@media(max-width:760px){
  .board-stage{min-height:60vh}
  .board-toolbar-side{left:6px;top:6px;width:112px;padding:8px!important;border-radius:14px;max-height:calc(100% - 12px)}
  .board-side-label{font-size:7px}
  .board-toolbar-side .board-quick-tools .btn{font-size:10px;min-height:38px!important;padding:6px 4px}
  .board-toolbar-side .board-tool-group>summary{min-height:40px;padding:8px 8px;font-size:11px}
  .board-toolbar-side .board-tool-popover{position:fixed!important;left:126px!important;right:8px!important;top:10px!important;bottom:10px!important;min-width:0!important;max-width:none!important;max-height:none!important;z-index:2400!important}
  .board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{top:10px!important;bottom:10px!important}
  .board-toolbar-side .board-shapes-popover{min-width:0!important}
  .board-toolbar-side .board-shapes-popover>.board-select{width:100%;min-width:0;flex-basis:100%}
  .board-toolbar-side .board-tool-row,
  .board-toolbar-side .board-shapes-popover .board-tool-row{grid-template-columns:1fr}
}

@media(max-width:480px){
  .board-toolbar-side{width:94px}
  .board-toolbar-side .board-tool-group>summary{font-size:10px;padding:7px}
  .board-toolbar-side .board-quick-tools [data-tool="select"],.board-toolbar-side .board-quick-tools [data-tool="hand"]{font-size:10px}
  .board-toolbar-side .board-tool-popover{left:104px!important}
}

/* Mathroom v26.6 — compact floating left toolbar */
.board-toolbar-side{
  width:64px!important;
  padding:7px!important;
  border-radius:18px!important;
  overflow:visible!important;
  max-height:none!important;
  background:rgba(255,255,253,.96)!important;
  box-shadow:0 12px 34px rgba(0,0,0,.12)!important;
}
.board-toolbar-side .board-tool-groups{gap:6px!important}
.board-rail-quick{display:grid!important;grid-template-columns:1fr 1fr!important;gap:5px!important}
.board-rail-quick .btn{min-height:34px!important;height:34px!important;padding:0!important;border-radius:10px!important;font-size:17px!important}
.board-rail-quick [data-tool="select"],.board-rail-quick [data-tool="hand"]{grid-column:span 2!important;height:42px!important;min-height:42px!important;font-size:18px!important}
.board-rail-divider{height:1px;background:#ecebe7;margin:1px 3px}
.board-toolbar-side .board-tool-group{width:100%!important}
.board-toolbar-side .board-tool-group>summary{
  width:100%!important;
  height:44px!important;
  min-height:44px!important;
  padding:0!important;
  display:grid!important;
  place-items:center!important;
  border:1px solid transparent!important;
  border-radius:12px!important;
  background:transparent!important;
  color:#242424!important;
  list-style:none!important;
}
.board-toolbar-side .board-tool-group>summary::-webkit-details-marker{display:none}
.board-toolbar-side .board-tool-group>summary:hover{background:#f4f2ee!important;border-color:#e8e4df!important}
.board-toolbar-side .board-tool-group[open]>summary,
.board-toolbar-side .board-tool-group.tool-active>summary{background:#fff0e8!important;border-color:#f5b89b!important;color:var(--koto-orange)!important;box-shadow:none!important}
.board-rail-icon{font-size:21px;line-height:1;font-weight:700;display:block}
.board-toolbar-side .board-tool-group[data-category="more"] .board-rail-icon{font-size:16px;letter-spacing:1px}
.board-toolbar-side .board-tool-popover{
  left:calc(100% + 10px)!important;
  min-width:330px!important;
  max-width:min(560px,calc(100vw - 105px))!important;
  max-height:min(76vh,660px)!important;
  padding:12px!important;
  border:1px solid #e5e2dd!important;
  background:rgba(255,255,253,.985)!important;
  border-radius:18px!important;
  box-shadow:0 18px 55px rgba(0,0,0,.14)!important;
  backdrop-filter:blur(14px)!important;
}
.board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{top:auto!important;bottom:0!important}
.board-popover-title{font-size:11px!important;margin-bottom:8px!important}
.board-action-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;width:100%}
.board-action-grid .btn{min-height:44px!important;width:100%!important;padding:9px 10px!important;display:flex;align-items:center;justify-content:flex-start;gap:8px;text-align:left}
.board-action-grid .btn span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.board-style-row{display:flex!important;grid-template-columns:none!important;align-items:center;gap:8px!important;flex-wrap:wrap!important}
.board-style-row .board-select{margin-left:auto;min-height:38px!important}
.board-palette-section{display:grid;gap:8px;padding:4px 0 10px}
.board-palette-section+.board-palette-section{border-top:1px solid #ecebe7;padding-top:12px}
.board-palette-section>b{font-size:12px;color:#777164;font-family:'Unbounded',Inter,sans-serif}
.board-palette-grid{display:grid;grid-template-columns:repeat(5,44px);gap:8px;justify-content:start}
.board-shape-icon{
  width:44px;height:44px;border:1px solid transparent;background:transparent;border-radius:12px;
  display:grid;place-items:center;font:700 25px/1 Georgia,'Times New Roman',serif;color:#34324a;cursor:pointer;
  transition:background .14s ease,border-color .14s ease,transform .08s ease;
}
.board-shape-icon:hover{background:#f5f2ff;border-color:#ddd5ff}
.board-shape-icon:active{transform:scale(.94);background:#eee8ff}
.board-palette-3d .board-shape-icon{font-size:23px}
.board-toolbar-side .board-shapes-popover{min-width:360px!important}
.board-toolbar-side .board-shapes-popover .board-tool-row{grid-template-columns:repeat(2,minmax(0,1fr))!important;margin-top:4px}
.board-stage .board-floating{right:12px!important;bottom:12px!important}

@media(max-width:760px){
  .board-toolbar-side{width:58px!important;left:6px!important;top:6px!important;padding:6px!important}
  .board-rail-quick .btn{height:32px!important;min-height:32px!important;font-size:15px!important}
  .board-rail-quick [data-tool="select"],.board-rail-quick [data-tool="hand"]{height:40px!important;min-height:40px!important}
  .board-toolbar-side .board-tool-group>summary{height:42px!important;min-height:42px!important}
  .board-rail-icon{font-size:19px}
  .board-toolbar-side .board-tool-popover,
  .board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{
    position:fixed!important;left:72px!important;right:8px!important;top:8px!important;bottom:8px!important;
    min-width:0!important;max-width:none!important;max-height:none!important;overflow:auto!important;
  }
  .board-action-grid{grid-template-columns:1fr 1fr}
  .board-palette-grid{grid-template-columns:repeat(5,minmax(38px,44px));gap:7px}
  .board-shape-icon{width:100%;height:42px}
  .board-toolbar-side .board-shapes-popover{min-width:0!important}
}

@media(max-width:430px){
  .board-toolbar-side{width:54px!important}
  .board-toolbar-side .board-tool-popover,
  .board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{left:66px!important}
  .board-action-grid{grid-template-columns:1fr}
  .board-palette-grid{grid-template-columns:repeat(4,minmax(38px,44px))}
}

/* Mathroom v26.7 — readable figure palette + 3D direct controls */
.board-shape-icon{
  width:76px!important;
  min-height:74px!important;
  height:auto!important;
  padding:7px 5px 6px!important;
  display:flex!important;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  color:#242337!important;
  background:#fff!important;
  border:1px solid #e8e6ee!important;
  border-radius:14px!important;
  position:relative;
  z-index:2;
  pointer-events:auto!important;
  user-select:none;
}
.board-shape-icon:hover{background:#f8f6ff!important;border-color:#cfc8f6!important;box-shadow:0 6px 16px rgba(77,67,130,.08)}
.board-shape-icon:active{transform:scale(.97)!important;background:#f0edff!important}
.board-shape-svg{width:46px;height:38px;display:block;overflow:visible;fill:none;stroke:currentColor;stroke-width:2.15;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.board-shape-svg .icon-detail{stroke-width:1.35;stroke-dasharray:3 2;opacity:.7}
.board-shape-label{display:block;width:100%;font-size:9px;line-height:1.12;font-weight:700;color:#69677b;white-space:normal;text-align:center;pointer-events:none}
.board-solid-icon .board-shape-svg{width:50px;height:40px;stroke-width:1.9}
.board-palette-grid{grid-template-columns:repeat(4,76px)!important;gap:9px!important;justify-content:start!important}
.board-toolbar-side .board-shapes-popover{min-width:380px!important;max-width:min(470px,calc(100vw - 105px))!important}
.board-solid-help{margin:2px 0 8px;padding:9px 10px;border-radius:11px;background:#fff7f2;border:1px solid #f4d8c9;color:#6c5143;font-size:10.5px;line-height:1.4}
.board-solid-actions{grid-template-columns:repeat(2,minmax(0,1fr))!important}
.board-solid-actions .btn{justify-content:center!important;text-align:center!important}
.board-solid-hud{
  position:absolute;z-index:125;display:flex;align-items:center;gap:5px;
  padding:5px;background:rgba(255,255,253,.96);border:1px solid #ddd9d2;border-radius:13px;
  box-shadow:0 10px 28px rgba(0,0,0,.13);backdrop-filter:blur(10px);white-space:nowrap;
}
.board-solid-hud[hidden]{display:none!important}
.board-solid-hud .btn{width:34px;min-width:34px;height:34px;min-height:34px;padding:0!important;display:grid;place-items:center;border-radius:9px;font-size:15px}
.board-solid-hud-sep{width:1px;height:22px;background:#e6e2dc;margin:0 2px}
.board-solid-hud-tip{font-size:9px;color:#87827a;padding:0 4px 0 2px}
.board-stage svg [data-resize-handle]{filter:drop-shadow(0 1px 1px rgba(0,0,0,.12))}

/* Make the dedicated scratch board visible as a first-class workspace. */
.nav button[data-nav="scratch"]{position:relative}
.nav button[data-nav="scratch"]::before{content:'✦';display:inline-block;margin-right:7px;color:var(--koto-orange);font-size:11px}
.nav button[data-nav="board"]::before{content:'▦';display:inline-block;margin-right:7px;color:#777;font-size:11px}

@media(max-width:760px){
  .board-palette-grid{grid-template-columns:repeat(3,minmax(66px,76px))!important}
  .board-shape-icon{width:100%!important;min-height:70px!important}
  .board-toolbar-side .board-shapes-popover{min-width:0!important;max-width:none!important}
  .board-solid-hud{left:auto!important;right:8px!important;top:auto!important;bottom:64px!important;max-width:calc(100% - 82px);overflow:auto}
  .board-solid-hud-tip{display:none}
}
@media(max-width:460px){
  .board-palette-grid{grid-template-columns:repeat(2,minmax(68px,1fr))!important}
}

/* Mathroom v26.8 — professional collaboration and object controls */
.board-stage{--board-bg-color:#fff;background-color:var(--board-bg-color)!important;background-position:0 0}
.board-stage[data-board-bg="blank"],.board-stage[data-board-bg="color"]{background-image:none!important}
.board-stage[data-board-bg="cream"]{background-image:none!important;background-color:#fffaf2!important}
.board-stage[data-board-bg="dots"]{background-image:radial-gradient(circle,#d8dbe0 1.1px,transparent 1.2px)!important;background-size:22px 22px!important}
.board-stage[data-board-bg="grid"]{background-image:linear-gradient(#e6e8ec 1px,transparent 1px),linear-gradient(90deg,#e6e8ec 1px,transparent 1px)!important;background-size:28px 28px!important}
.board-stage[data-board-bg="lines"]{background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,#e5e8ec 32px,#e5e8ec 33px)!important}
.board-stage.drag-active::after{content:'Перетащи файл сюда';position:absolute;inset:14px;z-index:130;border:2px dashed var(--koto-orange);border-radius:20px;background:rgba(255,247,242,.82);display:grid;place-items:center;color:var(--koto-orange);font-family:'Unbounded',Inter,sans-serif;font-weight:700;pointer-events:none}

.board-object-hud{position:absolute;z-index:128;display:flex;align-items:center;gap:4px;padding:5px;background:rgba(255,255,253,.97);border:1px solid #ddd9d2;border-radius:13px;box-shadow:0 10px 28px rgba(0,0,0,.13);backdrop-filter:blur(10px)}
.board-object-hud[hidden]{display:none!important}.board-object-hud .btn{width:34px;min-width:34px;height:34px;min-height:34px;padding:0!important;display:grid;place-items:center;border-radius:9px;font-size:14px}.board-object-hud.locked{border-color:#bbb8b0;background:#f8f8f5}.board-object-hud .danger{color:#b42318}
.board-follow-badge{position:absolute;right:12px;top:12px;z-index:124;padding:8px 11px;border-radius:999px;background:rgba(237,89,26,.94);color:#fff;font-size:11px;font-weight:800;box-shadow:0 8px 24px rgba(237,89,26,.22);pointer-events:none}.board-follow-badge[hidden]{display:none!important}
.board-permission-select{grid-column:1/-1;width:100%!important;min-height:44px!important;background:#fff;border:1px solid var(--line);border-radius:11px;padding:8px 10px}
.board-background-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:12px 0 16px}.board-background-grid button{min-height:70px;border:1px solid var(--line);border-radius:14px;background:#fff;font-weight:700;cursor:pointer}.board-background-grid button:hover{border-color:#f3a27a;background:#fff7f2}

@media(max-width:760px){.board-object-hud{right:8px!important;left:auto!important;top:8px!important;max-width:calc(100% - 80px);overflow:auto}.board-follow-badge{top:auto;bottom:64px;right:8px}.board-background-grid{grid-template-columns:1fr 1fr}}
.board-fill-swatches{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:12px 0}.board-fill-swatches button{min-height:54px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:11px;font-weight:700;cursor:pointer}.history-search-wrap{margin:12px 0}.history-search-wrap .search{max-width:620px;background:#fff}
.board-head-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.board-head-actions .board-permission-select{width:auto!important;min-width:150px;grid-column:auto!important}.board-head-actions #followTeacherToggle.active{background:var(--koto-orange)!important;color:#fff!important;border-color:var(--koto-orange)!important}
@media(max-width:760px){.board-head{align-items:flex-start}.board-head-actions{width:100%;justify-content:flex-start}.board-head-actions .board-permission-select{flex:1;min-width:130px}.board-head-actions #fullscreen{margin-left:auto}}

/* =========================================================
   Mathroom v27.0 — Variant B visual system
   Approved icon language + polished whiteboard controls
   ========================================================= */
:root{
  --mr-orange:#f55a16;
  --mr-orange-2:#ff6a22;
  --mr-orange-soft:#fff2eb;
  --mr-orange-border:#ffc2a5;
  --mr-ink:#171823;
  --mr-muted:#757783;
  --mr-surface:#ffffff;
  --mr-surface-soft:#fbfbfa;
  --mr-line:#e7e5e2;
  --mr-line-strong:#d9d6d1;
  --mr-shadow:0 18px 52px rgba(22,24,35,.11);
}
body{background:linear-gradient(180deg,#fbfbfa 0%,#f5f4f1 100%)!important;color:var(--mr-ink)}
.sidebar{background:rgba(255,255,255,.97)!important;border-right:1px solid var(--mr-line)!important;box-shadow:8px 0 30px rgba(25,25,30,.035)!important}
.sidebar::before{height:4px!important;left:20px!important;right:20px!important;top:77px!important;background:linear-gradient(90deg,var(--mr-orange) 0 44%,#171823 44% 71%,transparent 71%)!important}
.brand{color:var(--mr-orange)!important;font-size:21px!important;letter-spacing:-.055em!important}
.cloud-badge{background:#fff6f1!important;color:#bd430f!important;border:1px solid #ffd8c5!important;box-shadow:none!important}
.nav button{border-radius:12px!important;padding:12px 14px!important;margin:2px 0!important;font-size:14px!important;font-weight:760!important;color:#555861!important}
.nav button:hover{background:#f8f7f5!important;border-color:#ece9e5!important;color:#171823!important;transform:translateX(1px)}
.nav button.active{background:#171823!important;color:#fff!important;border-color:#171823!important;box-shadow:inset 4px 0 0 var(--mr-orange),0 8px 20px rgba(20,20,25,.08)!important}
.content{background:transparent!important}
.topbar{padding-bottom:16px!important;border-color:var(--mr-line)!important}.topbar::after{width:82px!important;background:var(--mr-orange)!important}
.topbar h1{font-size:30px!important;color:#11131a!important}
.topbar p{color:var(--mr-muted)!important}
.card,.form-card,.row,.board-card,.item-box,.modal{border-color:var(--mr-line)!important}
.btn{border-radius:12px!important;transition:transform .09s ease,box-shadow .14s ease,border-color .14s ease,background .14s ease,color .14s ease}
.btn:hover:not(:disabled){border-color:#cbc7c2}.btn:active:not(:disabled){transform:translateY(1px) scale(.985)}
.btn.primary{background:var(--mr-orange)!important;border-color:var(--mr-orange)!important}.btn.primary:hover:not(:disabled){background:var(--mr-orange-2)!important;border-color:var(--mr-orange-2)!important}

/* Unified SVG icon language */
.mr-ui-icon{width:21px;height:21px;display:block;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;overflow:visible;pointer-events:none}
.btn .mr-ui-icon{width:19px;height:19px}.board-icon-btn .mr-ui-icon,.board-rail-icon .mr-ui-icon{width:23px;height:23px}
.board-file-badge{display:inline-grid;place-items:center;min-width:35px;height:22px;padding:0 5px;border:1px solid currentColor;border-radius:6px;font-size:9px;font-weight:850;letter-spacing:.04em}

/* Whiteboard shell */
.board-card{border-radius:20px!important;background:#fff!important;box-shadow:0 18px 46px rgba(18,20,28,.07)!important;overflow:hidden!important}
.board-head{padding:11px 14px!important;background:#fff!important;border-bottom:1px solid var(--mr-line)!important}
.board-head-title strong{font-size:14px!important;color:#191a22!important}.board-status{color:#8a8c94!important}
.board-head-actions .btn{min-height:38px!important;gap:7px!important;background:#fff!important}
.board-head-actions .btn.active{background:var(--mr-orange-soft)!important;color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important}
.board-fullscreen-btn:hover{color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important;background:#fff8f4!important}
.board-page-tabs{padding:8px 12px!important;background:#fdfcfb!important;border-bottom:1px solid var(--mr-line)!important}
.board-page-tabs .btn{border-radius:10px!important;min-height:34px!important}
.board-stage{background-color:#fff!important;min-height:610px!important}
.board-stage[data-board-bg="dots"]{background-image:radial-gradient(circle,#d9dbe1 1px,transparent 1.1px)!important;background-size:22px 22px!important}
.board-hint{background:#faf9f7!important;border-top:1px solid var(--mr-line)!important;color:#8a8986!important;padding:8px 14px!important}

/* Compact left rail — approved Variant B */
.board-toolbar-side{
  width:68px!important;left:12px!important;top:12px!important;padding:8px!important;border:1px solid var(--mr-line)!important;border-radius:20px!important;
  background:rgba(255,255,255,.985)!important;box-shadow:0 14px 38px rgba(26,27,35,.11)!important;overflow:visible!important;max-height:calc(100% - 24px)!important;
}
.board-toolbar-side .board-tool-groups{gap:7px!important}.board-rail-quick{gap:6px!important}.board-rail-divider{margin:2px 5px!important;background:#ece9e4!important}
.board-rail-quick .btn{height:38px!important;min-height:38px!important;background:#fff!important;border:1px solid #ece9e5!important;color:#20222b!important;border-radius:12px!important;box-shadow:none!important}
.board-rail-quick [data-tool="select"],.board-rail-quick [data-tool="hand"]{height:48px!important;min-height:48px!important}
.board-rail-quick .btn:hover:not(:disabled){background:#faf9f7!important;border-color:#ddd9d4!important}
.board-rail-quick .btn.active{background:var(--mr-orange-soft)!important;color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important;box-shadow:0 5px 14px rgba(245,90,22,.10)!important}
.board-toolbar-side .board-tool-group>summary{height:48px!important;min-height:48px!important;border-radius:13px!important;color:#20222b!important;border:1px solid transparent!important}
.board-toolbar-side .board-tool-group>summary:hover{background:#f8f7f5!important;border-color:#ece8e3!important}
.board-toolbar-side .board-tool-group[open]>summary,.board-toolbar-side .board-tool-group.tool-active>summary{background:var(--mr-orange-soft)!important;color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important;box-shadow:0 5px 14px rgba(245,90,22,.08)!important}
.board-rail-icon{display:grid!important;place-items:center!important;width:28px;height:28px;color:inherit!important;font-size:0!important}
.board-toolbar-side .board-tool-group[data-category="more"] .board-rail-icon{font-size:0!important}

/* Popovers */
.board-toolbar-side .board-tool-popover{
  left:calc(100% + 12px)!important;min-width:460px!important;max-width:min(610px,calc(100vw - 115px))!important;max-height:min(78vh,700px)!important;
  padding:16px!important;border:1px solid var(--mr-line)!important;border-radius:20px!important;background:rgba(255,255,255,.992)!important;box-shadow:var(--mr-shadow)!important;backdrop-filter:blur(18px)!important;
}
.board-popover-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:0 2px 12px;margin-bottom:12px;border-bottom:1px solid #efede9}
.board-popover-title{padding:0!important;margin:0!important;border:0!important;color:#1c1d25!important;font-family:'Unbounded',Inter,sans-serif!important;font-size:14px!important;line-height:1.2!important;letter-spacing:-.03em!important}
.board-popover-subtitle{margin-top:4px;color:#8b8b91;font-size:11px;line-height:1.35}
.board-action-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:9px!important}
.board-action-grid .btn{min-height:62px!important;padding:10px 11px!important;display:flex!important;flex-direction:column!important;align-items:flex-start!important;justify-content:center!important;gap:7px!important;border:1px solid #e8e5e1!important;background:#fff!important;color:#1d1e26!important;text-align:left!important;border-radius:14px!important;box-shadow:none!important}
.board-action-grid .btn .mr-ui-icon{width:23px;height:23px}
.board-action-grid .btn span{white-space:normal!important;overflow:visible!important;text-overflow:clip!important;line-height:1.15;font-size:11px;font-weight:760}
.board-action-grid .btn:hover:not(:disabled){background:#faf9f7!important;border-color:#d8d4ce!important;transform:translateY(-1px)}
.board-action-grid .btn.active{background:var(--mr-orange-soft)!important;color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important;box-shadow:0 5px 15px rgba(245,90,22,.08)!important}
.board-action-grid .btn.danger:not(:disabled){color:#c23e16!important}.board-action-grid .btn:disabled{background:#fbfbfa!important;color:#c4c2be!important;border-color:#f0efed!important;opacity:1!important}
.board-writing-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important}.board-geometry-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important}.board-more-grid{grid-template-columns:repeat(4,minmax(0,1fr))!important}
.board-more-popover{min-width:610px!important;max-width:min(760px,calc(100vw - 115px))!important}
.board-tool-help{margin-top:10px!important;padding:10px 12px;border-radius:12px;background:#faf8f6;color:#777981!important;border:1px solid #eeebe7;font-size:10.5px!important}

/* Pen settings */
.board-style-row{display:flex!important;align-items:center!important;justify-content:space-between!important;gap:16px!important;padding-top:14px!important;margin-top:14px!important;border-top:1px solid #efede9!important}
.board-color-row{display:flex;align-items:center;gap:10px}.color-dot{width:31px!important;height:31px!important;border:3px solid #fff!important;box-shadow:0 0 0 1px #d9d6d1!important;transition:transform .1s ease,box-shadow .14s ease}.color-dot:hover{transform:scale(1.06)}.color-dot.active{box-shadow:0 0 0 2px var(--mr-orange)!important}
.board-width-select{min-width:150px!important;height:42px!important;border-radius:12px!important;border-color:#dedad4!important;background:#fff!important;padding:0 12px!important}

/* Shape palette */
.board-toolbar-side .board-shapes-popover{min-width:560px!important;max-width:min(680px,calc(100vw - 115px))!important}.board-palette-section{gap:10px!important;padding:2px 0 14px!important}.board-palette-section>b{font-size:12px!important;color:#6c6c76!important}.board-palette-grid{grid-template-columns:repeat(5,minmax(86px,1fr))!important;gap:10px!important;justify-content:stretch!important}
.board-shape-icon{width:100%!important;min-height:94px!important;padding:10px 6px 8px!important;border-radius:15px!important;border:1px solid #e7e4e0!important;background:#fff!important;color:#282936!important;gap:7px!important}
.board-shape-icon:hover{background:#fbfaf8!important;border-color:#d6d2cc!important;box-shadow:0 8px 18px rgba(45,45,55,.06)!important;transform:translateY(-1px)!important}.board-shape-icon:active{transform:translateY(0) scale(.985)!important}
.board-shape-svg{width:56px!important;height:45px!important;stroke-width:2.25!important}.board-shape-svg .icon-detail{stroke:var(--mr-orange)!important;opacity:1!important;stroke-width:1.6!important;stroke-dasharray:none!important}.board-shape-label{font-size:10px!important;line-height:1.18!important;color:#686975!important;font-weight:720!important}
.board-palette-3d .board-shape-icon{background:linear-gradient(180deg,#fff 0,#fcfbfa 100%)!important}.board-solid-help{background:#fff7f3!important;border-color:#f7d2bf!important;color:#78513f!important}
.board-solid-actions{grid-template-columns:repeat(4,minmax(0,1fr))!important}.board-solid-actions .btn{min-height:52px!important}

/* Floating object controls */
.board-object-hud,.board-solid-hud{border-color:var(--mr-line)!important;border-radius:15px!important;background:rgba(255,255,255,.98)!important;box-shadow:0 12px 34px rgba(25,26,35,.13)!important}.board-object-hud .btn,.board-solid-hud .btn{border:0!important;background:transparent!important;border-radius:10px!important;color:#2a2b34!important}.board-object-hud .btn:hover,.board-solid-hud .btn:hover{background:#f4f2ef!important}.board-object-hud .danger{color:#d3461c!important}
.board-floating{background:rgba(255,255,255,.97)!important;border:1px solid var(--mr-line)!important;border-radius:15px!important;padding:5px!important;box-shadow:0 12px 34px rgba(25,26,35,.10)!important}.board-floating .btn{border:0!important;background:transparent!important;min-height:34px!important}.board-floating #zoomLabel{min-width:58px;display:grid;place-items:center;color:#44454d;font-weight:750}
.board-follow-badge{display:flex!important;align-items:center!important;gap:6px!important;background:var(--mr-orange)!important}.board-follow-badge[hidden]{display:none!important}.board-follow-badge .mr-ui-icon{width:17px;height:17px}

@media(max-width:900px){
  .board-toolbar-side .board-tool-popover{min-width:400px!important;max-width:calc(100vw - 100px)!important}.board-more-popover{min-width:500px!important}.board-action-grid,.board-more-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.board-palette-grid{grid-template-columns:repeat(4,minmax(76px,1fr))!important}.board-toolbar-side .board-shapes-popover{min-width:470px!important}
}
@media(max-width:760px){
  .board-stage{min-height:65vh!important}.board-toolbar-side{width:60px!important;left:7px!important;top:7px!important;padding:6px!important;border-radius:17px!important}.board-rail-quick .btn{height:35px!important;min-height:35px!important}.board-rail-quick [data-tool="select"],.board-rail-quick [data-tool="hand"]{height:43px!important;min-height:43px!important}.board-toolbar-side .board-tool-group>summary{height:43px!important;min-height:43px!important}.board-toolbar-side .board-tool-popover,.board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover{left:74px!important;right:8px!important;top:8px!important;bottom:8px!important;min-width:0!important;max-width:none!important;max-height:none!important}.board-action-grid,.board-writing-grid,.board-geometry-grid,.board-more-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.board-palette-grid{grid-template-columns:repeat(3,minmax(76px,1fr))!important}.board-toolbar-side .board-shapes-popover{min-width:0!important;max-width:none!important}.board-style-row{align-items:flex-start!important;flex-direction:column!important}.board-width-select{width:100%!important}.board-color-row{width:100%;justify-content:space-between}
}
@media(max-width:460px){.board-action-grid,.board-writing-grid,.board-geometry-grid,.board-more-grid{grid-template-columns:1fr 1fr!important}.board-palette-grid{grid-template-columns:repeat(2,minmax(76px,1fr))!important}.board-action-grid .btn{min-height:58px!important}.board-popover-subtitle{display:none}}

/* Mathroom v27.1 — interaction recovery + viewport-safe popovers */
#boardSvg{position:absolute!important;inset:0!important;width:100%!important;height:100%!important;z-index:1!important;pointer-events:auto!important;touch-action:none!important}
.board-toolbar-side{z-index:30!important;overflow:visible!important}
.board-object-hud,.board-solid-hud,.board-floating,.board-follow-badge{z-index:35!important}
.board-stage.drag-active::after{pointer-events:none!important;z-index:25!important}
.board-toolbar-side .board-tool-popover{
  position:fixed!important;
  left:var(--mr-pop-left,96px)!important;
  top:var(--mr-pop-top,12px)!important;
  right:auto!important;
  bottom:auto!important;
  width:min(610px,calc(100vw - var(--mr-pop-left,96px) - 14px))!important;
  min-width:min(420px,calc(100vw - var(--mr-pop-left,96px) - 14px))!important;
  max-width:calc(100vw - var(--mr-pop-left,96px) - 14px)!important;
  max-height:var(--mr-pop-maxh,calc(100vh - 24px))!important;
  overflow:auto!important;
  overscroll-behavior:contain;
}
.board-toolbar-side .board-shapes-popover,.board-more-popover{
  width:min(680px,calc(100vw - var(--mr-pop-left,96px) - 14px))!important;
  min-width:min(520px,calc(100vw - var(--mr-pop-left,96px) - 14px))!important;
  max-width:calc(100vw - var(--mr-pop-left,96px) - 14px)!important;
}
.sidebar-footer{display:grid!important;grid-template-columns:1fr 1fr;gap:8px!important;align-items:center!important}
.sidebar-footer .sidebar-help{color:#555861!important;border-color:#e6e2dc!important;background:#fff!important}
.sidebar-footer .sidebar-help:hover{color:var(--mr-orange)!important;border-color:var(--mr-orange-border)!important;background:var(--mr-orange-soft)!important}
@media(max-width:760px){
  .board-toolbar-side .board-tool-popover,.board-toolbar-side .board-shapes-popover,.board-more-popover{
    left:var(--mr-pop-left,74px)!important;top:var(--mr-pop-top,8px)!important;
    width:calc(100vw - var(--mr-pop-left,74px) - 8px)!important;
    min-width:0!important;max-width:none!important;max-height:var(--mr-pop-maxh,calc(100vh - 16px))!important;
  }
}

/* Mathroom v27.3 — compact board UI, auto-hide workspace sidebar, safer panning */
.board-stage,#boardSvg,.board-stage svg,.board-stage svg text{
  -webkit-user-select:none!important;
  user-select:none!important;
  -webkit-touch-callout:none!important;
}
.board-stage.hand-mode,#boardSvg{touch-action:none!important}
.board-stage.hand-mode *{-webkit-user-select:none!important;user-select:none!important}

/* Smaller, denser tool popovers. */
.board-toolbar-side .board-tool-popover{
  width:min(420px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  min-width:min(330px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  max-width:calc(100vw - var(--mr-pop-left,92px) - 12px)!important;
  max-height:min(var(--mr-pop-maxh,72vh),620px)!important;
  padding:12px!important;
  border-radius:16px!important;
}
.board-popover-head{padding:0 1px 8px!important;margin-bottom:9px!important;gap:8px!important}
.board-popover-title{font-size:13px!important}.board-popover-subtitle{display:none!important}
.board-action-grid,.board-writing-grid,.board-geometry-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:7px!important}
.board-action-grid .btn{
  min-height:45px!important;
  padding:8px 10px!important;
  flex-direction:row!important;
  align-items:center!important;
  justify-content:flex-start!important;
  gap:8px!important;
  border-radius:12px!important;
}
.board-action-grid .btn .mr-ui-icon{width:19px!important;height:19px!important;flex:0 0 auto}
.board-action-grid .btn span{font-size:11px!important;line-height:1.1!important;white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important}
.board-tool-help{margin-top:8px!important;padding:8px 10px!important;font-size:10px!important;line-height:1.4!important}
.board-style-row{padding-top:10px!important;margin-top:10px!important;gap:10px!important}.board-color-row{gap:7px!important}.color-dot{width:27px!important;height:27px!important}.board-width-select{height:38px!important;min-width:124px!important}

/* Shapes stay visual, but use less screen space. */
.board-toolbar-side .board-shapes-popover{
  width:min(500px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  min-width:min(420px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  max-width:calc(100vw - var(--mr-pop-left,92px) - 12px)!important;
  max-height:min(var(--mr-pop-maxh,76vh),660px)!important;
}
.board-palette-section{gap:7px!important;padding:0 0 9px!important}.board-palette-section>b{font-size:11px!important}
.board-palette-grid{grid-template-columns:repeat(5,minmax(68px,1fr))!important;gap:7px!important}
.board-shape-icon{min-height:76px!important;padding:7px 4px 6px!important;border-radius:12px!important;gap:4px!important}.board-shape-svg{width:46px!important;height:37px!important}.board-shape-label{font-size:9px!important;line-height:1.1!important}
.board-solid-help{margin-top:4px!important;padding:8px 10px!important;font-size:10px!important;line-height:1.35!important}
.board-solid-actions{display:none!important}

/* Dense board actions: more commands, smaller footprint. */
.board-more-popover{
  width:min(520px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  min-width:min(440px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
}
.board-more-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:7px!important}
.board-more-grid .btn{min-height:43px!important}

/* 3D controls exist only beside a selected 3D object. */
.board-solid-hud{max-width:calc(100% - 94px)!important;overflow-x:auto!important;scrollbar-width:thin!important;white-space:nowrap!important}
.board-solid-hud .danger{color:#c23e16!important}

/* Auto-hide main navigation on board workspaces. Move the pointer to the far-left edge to reveal it. */
@media(min-width:901px){
  .layout.workspace-mode{display:block!important;min-height:100dvh!important}
  .workspace-mode .content{max-width:none!important;width:100%!important;margin:0!important;padding:22px 24px 28px 28px!important}
  .workspace-mode .sidebar{
    position:fixed!important;
    z-index:5000!important;
    left:0!important;top:0!important;bottom:0!important;
    width:250px!important;height:100dvh!important;
    padding:22px 16px calc(18px + env(safe-area-inset-bottom))!important;
    overflow-y:auto!important;overflow-x:hidden!important;
    transform:translateX(calc(-100% + 14px));
    transition:transform .2s ease,box-shadow .2s ease!important;
    box-shadow:8px 0 28px rgba(25,25,30,.04)!important;
  }
  .workspace-mode .sidebar:hover,.workspace-mode .sidebar:focus-within{
    transform:translateX(0)!important;
    box-shadow:18px 0 50px rgba(25,25,30,.13)!important;
  }
  .workspace-mode .sidebar::after{
    content:"";position:fixed;left:0;top:18%;width:14px;height:64%;border-radius:0 10px 10px 0;
    background:linear-gradient(180deg,transparent 0 10%,rgba(237,89,26,.7) 10% 90%,transparent 90% 100%);
    opacity:.22;pointer-events:auto;
  }
  .workspace-mode .sidebar:hover::after{opacity:0}
  .workspace-mode .sidebar-footer{
    position:sticky!important;bottom:0!important;margin-top:auto!important;padding-top:12px!important;padding-bottom:2px!important;
    background:linear-gradient(180deg,rgba(255,255,255,0),#fff 28%)!important;
  }
}

@media(max-width:760px){
  .board-toolbar-side .board-tool-popover,.board-toolbar-side .board-shapes-popover,.board-more-popover{
    max-height:calc(100dvh - 16px)!important;
  }
  .board-palette-grid{grid-template-columns:repeat(3,minmax(66px,1fr))!important}
  .board-more-grid,.board-action-grid,.board-writing-grid,.board-geometry-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}
}

/* Mathroom v27.4 — always-collapsed navigation, top board controls, modal lock */
.modal-backdrop{z-index:20000!important}

@media(min-width:901px){
  .layout.auto-sidebar{display:block!important;min-height:100dvh!important}
  .auto-sidebar .content{max-width:none!important;width:100%!important;margin:0!important;padding:22px 24px 28px 28px!important}
  .auto-sidebar .sidebar{
    position:fixed!important;z-index:5000!important;left:0!important;top:0!important;bottom:auto!important;
    width:250px!important;height:100svh!important;max-height:100dvh!important;box-sizing:border-box!important;
    padding:20px 14px max(14px,env(safe-area-inset-bottom))!important;display:flex!important;flex-direction:column!important;
    overflow:hidden!important;transform:translateX(calc(-100% + 16px))!important;
    transition:transform .19s ease,box-shadow .19s ease!important;box-shadow:8px 0 28px rgba(25,25,30,.035)!important;
  }
  .auto-sidebar .sidebar:hover,.auto-sidebar .sidebar:focus-within{transform:translateX(0)!important;box-shadow:18px 0 50px rgba(25,25,30,.14)!important}
  .auto-sidebar .sidebar::after{
    content:""!important;position:absolute!important;right:0!important;left:auto!important;top:12%!important;
    width:16px!important;height:76%!important;border-radius:10px 0 0 10px!important;
    background:linear-gradient(180deg,transparent 0 5%,rgba(237,89,26,.55) 5% 95%,transparent 95% 100%)!important;
    opacity:.24!important;pointer-events:auto!important;
  }
  .auto-sidebar .sidebar:hover::after,.auto-sidebar .sidebar:focus-within::after{opacity:0!important}
  .auto-sidebar .sidebar>.brand{flex:0 0 auto!important;margin-bottom:18px!important}
  .auto-sidebar .nav{flex:1 1 auto!important;min-height:0!important;overflow-y:auto!important;overflow-x:hidden!important;overscroll-behavior:contain!important;scrollbar-width:none!important;padding-bottom:8px!important}
  .auto-sidebar .nav::-webkit-scrollbar{display:none!important}
  .auto-sidebar .nav button{min-height:48px!important;margin:0 0 4px!important}
  .auto-sidebar .sidebar-footer{position:relative!important;bottom:auto!important;flex:0 0 auto!important;margin-top:8px!important;padding:10px 0 0!important;background:#fff!important;z-index:2!important;display:grid!important;grid-template-columns:1fr 1fr!important;gap:8px!important}
  .auto-sidebar .sidebar-footer .btn{min-height:40px!important}
}

.board-floating{top:12px!important;right:12px!important;bottom:auto!important}
.board-head-actions{gap:6px!important;flex-wrap:wrap!important}
.board-head-sep{width:1px;height:26px;background:#e8e4df;margin:0 2px;flex:0 0 auto}
.board-head-icon{min-width:38px!important;padding:7px 9px!important;gap:5px!important}
.board-head-icon .mr-ui-icon{width:17px!important;height:17px!important}
.board-head-label{font-size:10.5px;font-weight:750}
@media(max-width:1120px){.board-head-label{display:none}.board-head-icon{width:38px!important;padding:7px!important}}
@media(max-width:760px){.board-floating{top:8px!important;right:8px!important}.board-head-sep{display:none}.board-head-actions{width:100%!important}}

/* Mathroom v27.5 — compact board palettes */
@media(min-width:761px){
  .board-toolbar-side .board-tool-popover,
  .board-toolbar-side .board-shapes-popover,
  .board-more-popover{
    width:300px!important;
    min-width:300px!important;
    max-width:min(300px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
    max-height:min(var(--mr-pop-maxh,68vh),520px)!important;
    padding:9px!important;
    border-radius:14px!important;
    overflow:auto!important;
  }
  .board-toolbar-side .board-shapes-popover{
    width:360px!important;
    min-width:360px!important;
    max-width:min(360px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
    max-height:min(var(--mr-pop-maxh,68vh),560px)!important;
  }
  .board-more-popover{
    width:330px!important;
    min-width:330px!important;
    max-width:min(330px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  }
  .board-popover-head{padding:0 1px 6px!important;margin:0 0 7px!important;border-bottom:1px solid #efede9!important}
  .board-popover-title{font-size:12px!important;line-height:1.2!important}
  .board-popover-subtitle{display:none!important}
  .board-action-grid,.board-writing-grid,.board-geometry-grid,.board-more-grid{
    grid-template-columns:repeat(2,minmax(0,1fr))!important;
    gap:6px!important;
  }
  .board-action-grid .btn,.board-writing-grid .btn,.board-geometry-grid .btn,.board-more-grid .btn{
    min-height:38px!important;
    height:38px!important;
    padding:6px 8px!important;
    border-radius:10px!important;
    flex-direction:row!important;
    align-items:center!important;
    justify-content:flex-start!important;
    gap:7px!important;
    font-size:10.5px!important;
  }
  .board-action-grid .btn .mr-ui-icon,.board-writing-grid .btn .mr-ui-icon,.board-geometry-grid .btn .mr-ui-icon,.board-more-grid .btn .mr-ui-icon{
    width:17px!important;height:17px!important;flex:0 0 17px!important;
  }
  .board-action-grid .btn span,.board-writing-grid .btn span,.board-geometry-grid .btn span,.board-more-grid .btn span{
    font-size:10.5px!important;line-height:1!important;white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important;
  }
  .board-style-row{padding-top:7px!important;margin-top:7px!important;gap:7px!important;display:flex!important;align-items:center!important;flex-direction:row!important}
  .board-color-row{gap:5px!important;flex:1 1 auto!important}.color-dot{width:23px!important;height:23px!important;min-width:23px!important}
  .board-width-select{height:34px!important;min-height:34px!important;width:105px!important;min-width:105px!important;padding:5px 8px!important;font-size:10px!important}
  .board-tool-help,.board-solid-help{margin-top:7px!important;padding:7px 8px!important;font-size:9.5px!important;line-height:1.35!important;border-radius:9px!important}
  .board-palette-section{gap:5px!important;padding:0 0 7px!important}.board-palette-section>b{font-size:10px!important}
  .board-palette-grid{grid-template-columns:repeat(4,minmax(0,1fr))!important;gap:6px!important}
  .board-shape-icon{width:100%!important;min-width:0!important;min-height:62px!important;height:62px!important;padding:5px 3px!important;border-radius:10px!important;gap:2px!important}
  .board-shape-svg{width:38px!important;height:30px!important}.board-shape-label{font-size:8px!important;line-height:1.05!important;max-height:17px!important;overflow:hidden!important}
}

@media(max-width:760px){
  .board-toolbar-side .board-tool-popover,.board-toolbar-side .board-shapes-popover,.board-more-popover{
    left:72px!important;right:8px!important;top:8px!important;bottom:auto!important;
    width:auto!important;min-width:0!important;max-width:none!important;max-height:min(62dvh,500px)!important;
    padding:9px!important;border-radius:14px!important;overflow:auto!important;
  }
  .board-action-grid,.board-writing-grid,.board-geometry-grid,.board-more-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:6px!important}
  .board-action-grid .btn,.board-writing-grid .btn,.board-geometry-grid .btn,.board-more-grid .btn{min-height:40px!important;height:40px!important;padding:6px 8px!important;flex-direction:row!important;gap:7px!important}
  .board-palette-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:6px!important}
  .board-shape-icon{min-height:64px!important;height:64px!important;padding:5px!important}
  .board-shape-svg{width:38px!important;height:31px!important}.board-shape-label{font-size:8.5px!important}
}

/* Mathroom v27.7 — quick board actions */
.board-head-actions [data-tool].active{
  background:var(--koto-orange)!important;
  color:#fff!important;
  border-color:var(--koto-orange)!important;
}
.board-clear-head{color:#b42318!important}
.board-clear-head:hover:not(:disabled){background:#fff4f1!important;border-color:#efb8aa!important;color:#9f2e12!important}
@media(max-width:900px){
  .board-head-actions{overflow-x:auto!important;flex-wrap:nowrap!important;scrollbar-width:thin!important;padding-bottom:2px!important}
  .board-head-actions .board-fullscreen-btn{flex:0 0 auto!important}
  .board-head-actions .board-head-icon{flex:0 0 auto!important}
}

/* Mathroom v27.8 — ordered left board rail */
.board-toolbar-side .board-rail-main{
  display:flex!important;
  flex-direction:column!important;
  gap:7px!important;
}
.board-toolbar-side .board-rail-main .btn{
  width:100%!important;
  grid-column:auto!important;
  height:48px!important;
  min-height:48px!important;
}
.board-toolbar-side .board-rail-action{
  width:100%!important;
  height:48px!important;
  min-height:48px!important;
  padding:0!important;
  display:grid!important;
  place-items:center!important;
  border-radius:13px!important;
  border:1px solid transparent!important;
  background:#fff!important;
  color:#20222b!important;
  box-shadow:none!important;
}
.board-toolbar-side .board-rail-action:hover:not(:disabled){
  background:#f8f7f5!important;
  border-color:#ece8e3!important;
}
.board-toolbar-side .board-rail-action.active{
  background:var(--mr-orange-soft)!important;
  color:var(--mr-orange)!important;
  border-color:var(--mr-orange-border)!important;
  box-shadow:0 5px 14px rgba(245,90,22,.08)!important;
}
.board-toolbar-side .board-rail-action .mr-ui-icon,
.board-toolbar-side .board-rail-action svg{
  width:22px!important;
  height:22px!important;
}
.board-toolbar-side .board-rail-divider-bottom{margin-top:2px!important}
.board-toolbar-side .board-rail-clear{
  margin-top:auto!important;
  color:#b42318!important;
  background:#fffaf8!important;
  border-color:#f1d6cc!important;
}
.board-toolbar-side .board-rail-clear:hover:not(:disabled){
  background:#fff1ec!important;
  border-color:#efbca8!important;
  color:#a63a19!important;
}
@media(max-width:760px){
  .board-toolbar-side .board-rail-main .btn,
  .board-toolbar-side .board-rail-action{
    height:43px!important;
    min-height:43px!important;
  }
}

/* Mathroom v27.10 — compact, fixed-size zoom controls */
.board-stage .board-floating{
  position:absolute!important;
  left:auto!important;
  right:12px!important;
  top:12px!important;
  bottom:auto!important;
  inset:auto 12px auto auto!important;
  z-index:180!important;
  display:inline-flex!important;
  flex-direction:row!important;
  align-items:center!important;
  justify-content:flex-start!important;
  gap:2px!important;
  width:max-content!important;
  height:46px!important;
  min-width:0!important;
  max-width:none!important;
  min-height:46px!important;
  max-height:46px!important;
  margin:0!important;
  padding:4px!important;
  overflow:visible!important;
  border:1px solid var(--mr-line,#e5e1dc)!important;
  border-radius:15px!important;
  background:rgba(255,255,255,.96)!important;
  box-shadow:0 10px 28px rgba(25,26,35,.10)!important;
  backdrop-filter:blur(10px)!important;
  pointer-events:auto!important;
  white-space:nowrap!important;
}
.board-stage .board-floating .btn,
.board-stage .board-floating #zoomLabel{
  position:static!important;
  float:none!important;
  flex:0 0 auto!important;
  width:36px!important;
  height:36px!important;
  min-width:36px!important;
  max-width:36px!important;
  min-height:36px!important;
  max-height:36px!important;
  margin:0!important;
  padding:0!important;
  display:grid!important;
  place-items:center!important;
  border:0!important;
  border-radius:10px!important;
  background:transparent!important;
  box-shadow:none!important;
  line-height:1!important;
}
.board-stage .board-floating #zoomLabel{
  width:58px!important;
  min-width:58px!important;
  max-width:58px!important;
  color:#25262d!important;
  font-size:13px!important;
  font-weight:800!important;
  cursor:default!important;
  user-select:none!important;
}
.board-stage .board-floating button:hover:not(:disabled){
  background:#f6f4f1!important;
  color:var(--mr-orange,#ed591a)!important;
}
.board-stage .board-floating .mr-ui-icon{
  width:18px!important;
  height:18px!important;
  display:block!important;
}
@media(max-width:760px){
  .board-stage .board-floating{
    right:8px!important;
    top:8px!important;
    inset:auto 8px auto auto!important;
    height:42px!important;
    min-height:42px!important;
    max-height:42px!important;
    padding:3px!important;
    border-radius:13px!important;
  }
  .board-stage .board-floating .btn,
  .board-stage .board-floating #zoomLabel{
    width:34px!important;
    height:34px!important;
    min-width:34px!important;
    max-width:34px!important;
    min-height:34px!important;
    max-height:34px!important;
  }
  .board-stage .board-floating #zoomLabel{
    width:52px!important;
    min-width:52px!important;
    max-width:52px!important;
    font-size:12px!important;
  }
}

/* Mathroom v27.12 — lesson board popovers match scratch-board behavior */
/* Older nth-last-child rules anchored the last palettes (Lesson / More) to the
   bottom of the viewport. In a live lesson this made them stretch below the
   visible board. Always use the viewport-safe position calculated by JS. */
.board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover,
.board-toolbar-side .board-tool-group[data-category="lesson"] .board-tool-popover,
.board-toolbar-side .board-tool-group[data-category="more"] .board-tool-popover{
  position:fixed!important;
  left:var(--mr-pop-left,92px)!important;
  top:var(--mr-pop-top,12px)!important;
  right:auto!important;
  bottom:auto!important;
  max-height:min(var(--mr-pop-maxh,68vh),520px)!important;
  overflow:auto!important;
  overscroll-behavior:contain!important;
}

/* The live-lesson canvas uses exactly the same compact palette geometry as the
   teacher scratch board. */
.mr-lesson-board-main .board-toolbar-side .board-tool-popover,
.student-lesson-room .board-toolbar-side .board-tool-popover{
  width:300px!important;
  min-width:300px!important;
  max-width:min(300px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  max-height:min(var(--mr-pop-maxh,68vh),520px)!important;
}
.mr-lesson-board-main .board-toolbar-side .board-shapes-popover,
.student-lesson-room .board-toolbar-side .board-shapes-popover{
  width:360px!important;
  min-width:360px!important;
  max-width:min(360px,calc(100vw - var(--mr-pop-left,92px) - 12px))!important;
  max-height:min(var(--mr-pop-maxh,68vh),560px)!important;
}
@media(max-width:760px){
  .board-toolbar-side .board-tool-group:nth-last-child(-n+2) .board-tool-popover,
  .board-toolbar-side .board-tool-group[data-category="lesson"] .board-tool-popover,
  .board-toolbar-side .board-tool-group[data-category="more"] .board-tool-popover,
  .mr-lesson-board-main .board-toolbar-side .board-tool-popover,
  .student-lesson-room .board-toolbar-side .board-tool-popover,
  .mr-lesson-board-main .board-toolbar-side .board-shapes-popover,
  .student-lesson-room .board-toolbar-side .board-shapes-popover{
    left:72px!important;
    right:8px!important;
    top:var(--mr-pop-top,8px)!important;
    bottom:auto!important;
    width:auto!important;
    min-width:0!important;
    max-width:none!important;
    max-height:min(var(--mr-pop-maxh,62dvh),500px)!important;
  }
}

/* Mathroom v28.2 — curriculum path, child-friendly theory and textbook library */
.mr-curriculum-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;align-items:center;margin-bottom:16px}
.mr-curriculum-head h2,.mr-curriculum-track-head h2,.mr-topic-hero h2{margin:6px 0 4px}
.mr-grade-tabs{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;max-width:520px}
.mr-grade-tabs .btn{min-width:38px}
.mr-curriculum-track{margin:18px 0 28px}
.mr-curriculum-track-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin:0 4px 10px}
.mr-curriculum-list{display:grid;gap:8px}
.mr-curriculum-row{display:grid;grid-template-columns:46px minmax(0,1fr) auto;gap:12px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:15px;padding:12px 14px;cursor:pointer;transition:.16s ease}
.mr-curriculum-row:hover{border-color:#c9cdd2;transform:translateY(-1px);box-shadow:0 8px 24px #00000008}
.mr-curriculum-row.custom{border-style:dashed}
.mr-curriculum-step{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:#f5f6f8;font-weight:800;font-size:12px;color:#555d66;font-variant-numeric:tabular-nums}
.mr-curriculum-main h3{margin:2px 0 5px;font-size:16px}
.mr-row-arrow{font-size:20px;color:#9aa0a7;padding-left:3px}
.mr-topic-create summary{cursor:pointer;display:flex;gap:12px;justify-content:space-between;align-items:center;list-style:none}.mr-topic-create summary::-webkit-details-marker{display:none}.mr-topic-create[open] summary{margin-bottom:14px}
.mr-topic-hero{margin-bottom:14px}.mr-topic-hero>.mr-card-head{align-items:flex-start}.mr-next-topic-mini{min-width:min(340px,100%);padding:13px 14px;border-radius:14px;background:#f7f8f9;border:1px solid var(--line);display:grid;gap:5px}.mr-next-topic-mini small{color:var(--muted)}
.mr-theory-card{margin-bottom:14px}.mr-theory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px}.mr-theory-block{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fbfbfc}.mr-theory-block.lead{grid-column:1/-1;background:#fff8f4;border-color:#f0d5c7}.mr-theory-block h3{margin:0 0 8px;font-size:14px}.mr-theory-body{white-space:pre-wrap;line-height:1.65;font-size:14px;color:#34383e}
.mr-topic-sources{margin-bottom:18px}.mr-textbook-source{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 0;border-top:1px solid var(--line)}.mr-textbook-source:first-of-type{border-top:0}.mr-textbook-source>div:first-child{display:grid;gap:3px}.mr-textbook-source span,.mr-textbook-source small{color:var(--muted);font-size:12px}
.mr-profile-next-topic,.mr-schedule-suggestion{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:16px}.mr-profile-next-topic h2,.mr-schedule-suggestion h3{margin:7px 0 4px}
.mr-textbook-setup{max-width:820px}.mr-textbook-upload{margin-bottom:18px}.mr-textbook-card{display:grid;gap:12px}.mr-textbook-card h3{margin:5px 0}.mr-textbook-links{display:flex;gap:6px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:11px}
@media(max-width:900px){.mr-curriculum-head{grid-template-columns:1fr}.mr-grade-tabs{justify-content:flex-start;max-width:none}.mr-theory-grid{grid-template-columns:1fr}.mr-theory-block.lead{grid-column:auto}.mr-profile-next-topic,.mr-schedule-suggestion,.mr-textbook-source{align-items:flex-start;flex-direction:column}.mr-curriculum-row{grid-template-columns:38px minmax(0,1fr)}.mr-curriculum-row>.actions{grid-column:2}.mr-row-arrow{display:none}}
@media(max-width:560px){.mr-grade-tabs{display:grid;grid-template-columns:repeat(6,1fr)}.mr-grade-tabs .btn{min-width:0;padding-left:7px;padding-right:7px}.mr-curriculum-row{padding:11px}.mr-curriculum-step{width:32px;height:32px}.mr-topic-hero>.mr-card-head{display:grid;gap:12px}}

/* v28.5 — textbook-grounded theory */
.mr-theory-source{margin-top:8px;max-width:820px;padding:8px 11px;border:1px solid #f1d1c0;border-radius:12px;background:#fff8f4;color:#69584e;font-size:12px;line-height:1.45}
.mr-theory-source b{color:#c44e1f}
.mr-curriculum-source{display:flex;gap:12px;align-items:flex-start;margin:0 0 12px;padding:12px 14px;border:1px solid #e5e2dd;border-radius:14px;background:#faf9f7}
.mr-curriculum-source>div{display:grid;gap:4px;min-width:0}
.mr-curriculum-source b{font-size:13px;line-height:1.45;color:#252525}
.mr-curriculum-source small{color:#77746f;line-height:1.4}
@media(max-width:700px){.mr-curriculum-source{flex-direction:column}.mr-theory-source{font-size:11px}}

/* v28.8 — large PDF / resumable textbook upload */
.mr-upload-progress{margin:14px 0;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff}
.mr-upload-progress[hidden]{display:none!important}
.mr-upload-progress-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.mr-upload-progress-head b{font-size:14px;line-height:1.35}
.mr-upload-progress-head span{font-weight:800;font-variant-numeric:tabular-nums}
.mr-upload-track{height:10px;border-radius:999px;background:#f0f1f3;overflow:hidden}
.mr-upload-track i{display:block;width:0;height:100%;border-radius:inherit;background:var(--accent,#ed591a);transition:width .18s ease}
.mr-upload-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:9px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.mr-upload-progress .actions{margin-top:10px}
@media (max-width:700px){.mr-upload-meta{display:grid;grid-template-columns:1fr 1fr}.mr-upload-meta span:last-child{grid-column:1/-1}}

/* v28.9 — textbook pages → board */
.mr-textbook-board-actions{margin-top:14px;flex-wrap:wrap}
.mr-textbook-board-actions .btn{min-height:42px}
.mr-lesson-textbook{display:grid;gap:10px;margin-bottom:10px}
.mr-lesson-textbook .actions{flex-wrap:wrap}
@media(max-width:700px){.mr-textbook-board-actions .btn{width:100%;justify-content:center}}

/* v29.0 — automatic textbook ↔ topic synchronization */
.mr-textbook-sync-card{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:18px;background:linear-gradient(135deg,#fff8f3 0%,#fff 62%);border-color:#f1c8b0}
.mr-textbook-sync-card>div:first-child{max-width:820px}
.mr-textbook-sync-card h2{margin:7px 0 6px}
.mr-textbook-sync-card .actions{flex-wrap:wrap}
@media(max-width:800px){.mr-textbook-sync-card{align-items:flex-start;flex-direction:column}.mr-textbook-sync-card>div:last-child,.mr-textbook-sync-card>div:last-child .btn{width:100%}}


/* Mathroom v30.7 — single-row compact board header */
@media(min-width:901px){
  .board-head{
    flex-wrap:nowrap!important;
    gap:8px!important;
  }
  .board-head-title{
    flex:0 1 245px!important;
    max-width:245px!important;
    min-width:130px!important;
  }
  .board-head-title .board-status{
    max-width:118px!important;
  }
  .board-head-actions{
    flex:1 1 auto!important;
    min-width:0!important;
    display:flex!important;
    align-items:center!important;
    justify-content:flex-end!important;
    flex-wrap:nowrap!important;
    gap:5px!important;
    overflow-x:auto!important;
    overflow-y:hidden!important;
    scrollbar-width:none!important;
    padding-bottom:0!important;
  }
  .board-head-actions::-webkit-scrollbar{display:none!important}
  .board-head-actions .btn{
    flex:0 0 auto!important;
    min-height:36px!important;
    padding:6px 9px!important;
    gap:5px!important;
    font-size:12px!important;
    white-space:nowrap!important;
  }
  .board-head-actions .board-head-icon{
    width:auto!important;
    min-width:36px!important;
    padding:6px 8px!important;
  }
  .board-head-actions .board-head-label{
    display:inline!important;
    font-size:10.5px!important;
    white-space:nowrap!important;
  }
  .board-head-actions .board-head-sep{
    margin:0 1px!important;
    height:24px!important;
  }
  .board-head-actions .board-shortcuts-btn{
    padding:6px 8px!important;
    gap:4px!important;
    font-size:11px!important;
  }
  .board-head-actions .board-fullscreen-btn{
    padding:6px 9px!important;
    font-size:11.5px!important;
  }
}


/* Mathroom v30.8 — force a true single-line desktop board header */
@media(min-width:901px){
  .board-head{
    display:flex!important;
    align-items:center!important;
    flex-wrap:nowrap!important;
    gap:6px!important;
    padding:8px 10px!important;
  }
  .board-head-title{
    flex:0 0 auto!important;
    width:auto!important;
    max-width:180px!important;
    min-width:110px!important;
  }
  .board-head-title .board-status{
    display:none!important;
  }
  .board-head-actions{
    flex:1 1 0!important;
    min-width:0!important;
    width:auto!important;
    display:flex!important;
    align-items:center!important;
    justify-content:flex-end!important;
    flex-wrap:nowrap!important;
    gap:4px!important;
    overflow-x:auto!important;
    overflow-y:hidden!important;
    scrollbar-width:none!important;
    white-space:nowrap!important;
  }
  .board-head-actions::-webkit-scrollbar{display:none!important}
  .board-head-actions .btn{
    flex:0 0 auto!important;
    min-height:34px!important;
    height:34px!important;
    padding:5px 8px!important;
    gap:4px!important;
    border-radius:10px!important;
    font-size:11px!important;
    white-space:nowrap!important;
  }
  .board-head-actions .board-head-icon{
    min-width:34px!important;
    width:auto!important;
    padding:5px 7px!important;
  }
  .board-head-actions .board-head-icon .mr-ui-icon{
    width:16px!important;
    height:16px!important;
  }
  .board-head-actions .board-head-sep{
    height:22px!important;
    margin:0!important;
  }

  /* Compact history/layer controls: icon only */
  .board-head-actions #undo .board-head-label,
  .board-head-actions #redo .board-head-label,
  .board-head-actions #bringForward .board-head-label,
  .board-head-actions #sendBackward .board-head-label{
    display:none!important;
  }
  .board-head-actions #undo,
  .board-head-actions #redo,
  .board-head-actions #bringForward,
  .board-head-actions #sendBackward{
    width:34px!important;
    padding:5px!important;
  }

  /* Page navigation stays readable but compact */
  .board-head-actions #pageLeft .board-head-label,
  .board-head-actions #pageRight .board-head-label,
  .board-head-actions #addPage .board-head-label,
  .board-head-actions #delPage .board-head-label{
    display:inline!important;
    font-size:10.5px!important;
  }

  /* Works even if an older board JS bundle is cached */
  .board-head-actions #quickCommands span{display:none!important}
  .board-head-actions #quickCommands::after{
    content:"Команды";
    font-size:10.5px;
    font-weight:750;
  }
  .board-head-actions #quickCommands{
    padding:5px 7px!important;
    min-width:auto!important;
  }

  .board-head-actions #delPage .board-head-label{
    font-size:0!important;
  }
  .board-head-actions #delPage .board-head-label::after{
    content:"Удалить лист";
    font-size:10.5px!important;
  }

  .board-head-actions #fullscreen{
    margin-left:0!important;
    padding:5px 8px!important;
    font-size:10.5px!important;
  }
}