:root{--bg:#f4f6fa;--card:#fff;--ink:#151c33;--ink-2:#3c4459;--muted:#747b90;--line:#e3e7ef;--line-2:#eef1f6;--navy:#151c33;--blue:#2f5fe0;--blue-soft:#e8edff;--green:#1f8a5b;--green-soft:#e3f6ec;--orange:#d4691f;--orange-soft:#fff0e3;--red:#c8352f;--red-soft:#fdeceb;--radius:14px;--shadow:0 1px 2px #141e3c0d, 0 4px 16px #141e3c0a;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body,#root{height:100%}body{color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;margin:0;font:14px/1.45 Inter,system-ui,-apple-system,Segoe UI,sans-serif}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}h1,h2,h3,h4{letter-spacing:-.01em;margin:0}a{color:inherit;text-decoration:none}.muted{color:var(--muted)}.center{text-align:center}.row{align-items:center;display:flex}.row.gap{gap:8px}.row.wrap{flex-wrap:wrap}.row.between{justify-content:space-between}.eyebrow{letter-spacing:.08em;text-transform:uppercase;color:#9aa3bd;font-size:11px;font-weight:700;display:block}.eyebrow.blue{color:var(--blue)}input:not([type=checkbox]):not([type=radio]),select,textarea{border:1px solid var(--line);background:#fff;border-radius:10px;outline:none;width:100%;padding:10px 12px;transition:border-color .15s,box-shadow .15s}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2f5fe026}input[type=checkbox]{width:18px;height:18px;accent-color:var(--blue);flex:none;margin:0}label{margin:14px 0 6px;font-size:13px;font-weight:600;display:block}label>input,label>select{margin-top:6px;font-weight:400}.btn{white-space:nowrap;border:1px solid #0000;border-radius:10px;justify-content:center;align-items:center;gap:7px;height:38px;padding:0 14px;font-weight:600;transition:background .15s,opacity .15s,border-color .15s;display:inline-flex}.btn.sm{border-radius:8px;height:30px;padding:0 10px;font-size:13px}.btn.block{width:100%}.btn.primary{background:var(--navy);color:#fff}.btn.primary:disabled{color:#5d6478;background:#c9cfdd}.btn.blue{background:var(--blue);color:#fff}.btn.blue:hover:not(:disabled){background:#2550c8}.btn.blue:disabled{background:#a9bcf2}.btn.green{background:var(--green);color:#fff}.btn.red{background:var(--red);color:#fff}.btn.red:hover{background:#ad2a25}.btn.white{color:var(--ink);background:#fff}.btn.soft{background:var(--blue-soft);color:var(--blue)}.btn.soft:hover{background:#dbe3ff}.btn.ghost{border-color:var(--line);color:var(--ink);background:#fff}.btn.ghost:hover{background:#f7f8fb}.btn.ghost.active{background:var(--orange-soft);color:var(--orange);border-color:#f2c9a5}.btn.outline-red{color:var(--red);background:#fff;border-color:#f0c2bf}.btn.hand{background:var(--orange-soft);color:var(--orange);border-color:#f2c9a5}.btn.hand.on{background:var(--orange);color:#fff}.link{color:var(--blue);background:0 0;border:0;padding:0;font-size:13px;font-weight:600}.link.sm{font-size:12px}.icon-btn{border:1px solid var(--line);width:36px;height:36px;color:var(--ink-2);background:#fff;border-radius:10px;flex:none;place-items:center;display:inline-grid;position:relative}.icon-btn:hover{background:#f5f7fb}.icon-btn.sm{border-radius:8px;width:28px;height:28px}.icon-btn.dark{color:#fff;background:0 0;border-color:#3a4361}.icon-btn .dot{background:var(--red);border-radius:50%;width:8px;height:8px;position:absolute;top:5px;right:5px}.error{background:var(--red-soft);color:var(--red);border-radius:9px;margin-top:12px;padding:9px 12px;font-size:13px}.check{align-items:center;gap:9px;font-weight:500;display:flex}.check.sm{color:var(--muted);margin:8px 0;font-size:13px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.card h3{font-size:16px}.card.empty{text-align:center;color:var(--muted);padding:48px 20px}.card.empty h3{color:var(--ink);margin:10px 0 4px}.logo{align-items:center;gap:10px;font-size:16px;font-weight:700;display:inline-flex}.logo-mark{background:var(--navy);color:#fff;border-radius:9px;flex:none;place-items:center;width:34px;height:34px;display:grid}.avatar{color:#fff;border-radius:50%;flex:none;place-items:center;width:34px;height:34px;font-size:12px;font-weight:700;display:inline-grid}.avatar.sm{width:26px;height:26px;font-size:10px}.center-screen{text-align:center;min-height:100%;color:var(--muted);place-content:center;gap:14px;padding:20px;display:grid}.landing{background:radial-gradient(1200px 500px at 50% -10%, #e9eeff 0%, transparent 70%), var(--bg);min-height:100%}.landing-top{justify-content:space-between;align-items:center;max-width:1120px;margin:0 auto;padding:22px 24px;display:flex}.landing-top nav{gap:28px;font-weight:500;display:flex}.landing-main{text-align:center;max-width:900px;margin:0 auto;padding:24px 16px 60px}.landing-main h1{letter-spacing:-.03em;font-size:clamp(30px,5vw,44px);font-weight:800}.lead{max-width:480px;color:var(--muted);margin:12px auto 34px;font-size:15px}.landing-cards{text-align:left;grid-template-columns:1fr 1fr;gap:18px;display:grid}.landing-card{flex-direction:column;padding:24px;display:flex}.landing-card .btn.block{margin-top:14px}.card-head{align-items:center;gap:12px;margin-bottom:14px;display:flex}.card-head h3{font-size:18px}.card-head p{color:var(--muted);margin:0;font-size:13px}.badge-icon{border-radius:10px;flex:none;place-items:center;width:40px;height:40px;display:grid}.badge-icon.orange{background:var(--orange-soft);color:var(--orange)}.badge-icon.blue{background:var(--blue-soft);color:var(--blue)}.field-row{justify-content:space-between;align-items:baseline;display:flex}.field-row label{margin-bottom:6px}.code-input{text-align:center;letter-spacing:.25em;text-transform:uppercase;height:60px;background:#f7f8fc!important;font:600 26px/1 JetBrains Mono,monospace!important}.hint{color:var(--muted);margin-top:6px;font-size:12px;display:block}.qr-help{color:var(--muted);background:#f7f8fc;border-radius:9px;margin:10px 0 0;padding:10px 12px;font-size:13px}.segmented{background:#eef1f6;border-radius:10px;gap:4px;padding:4px;display:flex}.segmented button{color:var(--ink-2);background:0 0;border:0;border-radius:7px;flex:1;padding:8px 10px;font-size:13px;font-weight:600}.segmented button.on{color:var(--ink);background:#fff;box-shadow:0 1px 3px #141e3c1a}.two{grid-template-columns:1fr 1fr;gap:10px;display:grid}.pass{position:relative}.pass input{padding-right:42px}.pass button{color:var(--muted);background:0 0;border:0;padding:6px;position:absolute;top:50%;right:6px;transform:translateY(-50%)}.landing-card .check{margin:14px 0 0}.perks{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:8px 28px;margin:28px 0 0;padding:0;font-size:13px;list-style:none;display:flex}.perks li{align-items:center;gap:6px;display:flex}.perks svg{color:var(--green)}.how{text-align:left;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-top:56px;padding:24px 28px}.how h2{margin-bottom:10px;font-size:20px}.how ol{color:var(--ink-2);margin:0;padding-left:20px}.how li{margin:6px 0}.how p{color:var(--ink-2);margin:0}.dash{grid-template-columns:240px 1fr;min-height:100%;display:grid}.sidebar{border-right:1px solid var(--line);background:#fff;flex-direction:column;height:100vh;padding:20px 14px;display:flex;position:sticky;top:0}.sidebar .logo{padding:0 8px 22px}.sidebar nav{flex-direction:column;flex:1;gap:2px;display:flex}.sidebar nav a{color:var(--ink-2);border-radius:10px;align-items:center;gap:11px;padding:10px 12px;font-weight:500;display:flex}.sidebar nav a:hover{background:#f5f7fb}.sidebar nav a.on{background:var(--blue-soft);color:var(--blue);font-weight:600}.sidebar nav svg{flex:none}.sidebar-user{border-top:1px solid var(--line);align-items:center;gap:10px;padding:16px 6px 0;display:flex}.sidebar-user div{flex:1;min-width:0}.sidebar-user b,.sidebar-user small{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.sidebar-user small{color:var(--muted)}.sidebar-user .icon-btn{border:0}.scrim{display:none}.dash-main{min-width:0;max-width:1280px;padding:28px 32px 48px}.dash-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px;display:flex}.dash-head h1{font-size:24px;font-weight:700}.dash-head p{margin:4px 0 0}.dash-actions{gap:10px;display:flex}.search{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:10px;align-items:center;gap:8px;width:240px;margin:0;padding:0 12px;display:flex}.search input{box-shadow:none!important;background:0 0!important;border:0!important;padding:9px 0!important}.mobile-only{display:none!important}.code-card{background:var(--navy);color:#fff;border-radius:18px;grid-template-columns:1fr auto 280px;align-items:center;gap:28px;margin-bottom:28px;padding:26px 30px;display:grid}.code-card.idle{grid-template-columns:1fr}.code-card h2{margin:8px 0 14px;font-size:19px}.code-card.idle p{color:#aeb5cb;margin:0}.code-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.big-code{letter-spacing:.12em;background:#232c4a;border-radius:12px;padding:14px 20px;font:700 36px/1 JetBrains Mono,monospace}.code-foot{color:#aeb5cb;margin:14px 0 0;font-size:12px}.qr-box{background:#fff;border-radius:12px;padding:10px;line-height:0}.code-settings{border-left:1px solid #2d3655;padding-left:26px}.code-settings .eyebrow{margin-bottom:8px}.toggle-row{color:#e1e5f0;cursor:pointer;justify-content:space-between;align-items:center;margin:0;padding:7px 0;font-size:13px;font-weight:500;display:flex}.dash-grid{grid-template-columns:1fr 300px;align-items:start;gap:22px;display:grid}.dash-side{flex-direction:column;gap:18px;display:flex}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.section-head h2{font-size:18px}.section-head.small{margin-bottom:10px}.tabs{background:#e9ecf3;border-radius:10px;padding:3px;display:flex}.tabs button{color:var(--ink-2);background:0 0;border:0;border-radius:8px;padding:6px 12px;font-size:13px;font-weight:600}.tabs button.on{color:var(--ink);background:#fff;box-shadow:0 1px 3px #141e3c1a}.boards{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;display:grid}.board-card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;flex-direction:column;display:flex;overflow:visible}.board-thumb{border-bottom:1px solid var(--line-2);border-radius:var(--radius) var(--radius) 0 0;position:relative;overflow:visible}.thumb-canvas{aspect-ratio:16/10;border-radius:var(--radius) var(--radius) 0 0;width:100%;display:block}.live-pill,.draft-pill{text-transform:uppercase;letter-spacing:.03em;border-radius:99px;padding:3px 9px;font-size:11px;font-weight:700;position:absolute;top:10px;left:10px}.live-pill{background:var(--green-soft);color:var(--green)}.draft-pill{color:var(--muted);background:#eef1f6}.thumb-menu{opacity:0;width:28px;height:28px;transition:opacity .15s;position:absolute;top:6px;right:6px}.board-card:hover .thumb-menu,.thumb-menu:focus{opacity:1}.board-body{flex-direction:column;flex:1;padding:12px 14px 14px;display:flex}.board-body h3{font-size:14px}.meta{align-items:center;gap:8px;margin:6px 0 12px;font-size:12px;display:flex}.chip{border-radius:6px;padding:2px 7px;font-size:11px;font-weight:700}.board-foot{justify-content:space-between;align-items:center;margin-top:auto;display:flex}.board-foot code{font:600 12px JetBrains Mono,monospace}.dropdown{z-index:30;border:1px solid var(--line);background:#fff;border-radius:10px;flex-direction:column;min-width:170px;padding:5px;display:flex;position:absolute;top:38px;left:auto;right:6px;box-shadow:0 10px 30px #141e3c26}.dropdown.right{right:0}.dropdown button{text-align:left;background:0 0;border:0;border-radius:7px;padding:8px 10px;font-weight:500}.dropdown button:hover{background:#f3f5fa}.dropdown .danger{color:var(--red)}.class-list{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.class-list li{align-items:center;gap:12px;font-size:13px;display:flex}.class-list li>div{flex:1;min-width:0}.class-list b{display:block}.class-list small{color:var(--muted)}.class-badge{border-radius:10px;flex:none;place-items:center;width:38px;height:38px;font-size:13px;font-weight:700;display:grid}.class-list.big li{border-bottom:1px solid var(--line-2);padding-bottom:12px}.activity{flex-direction:column;gap:12px;margin:12px 0 0;padding:0;list-style:none;display:flex}.activity li{padding-left:16px;font-size:13px;position:relative}.activity li:before{content:"";background:var(--green);border-radius:50%;width:7px;height:7px;position:absolute;top:7px;left:0}.activity li.warn:before{background:var(--orange)}.activity li.muted:before{display:none}.activity small{color:var(--muted);display:block}.form h3{margin-bottom:4px}.form .btn{margin-top:16px}.modal-back{z-index:100;background:#0f142873;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.modal{width:100%;max-width:460px;max-height:90vh;overflow:auto}.modal h3{margin-bottom:4px;font-size:18px}.modal-actions{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.modal .row input{flex:1}.modal .row+.row,.modal label+.row{margin-top:8px}.qr-modal{text-align:center;flex-direction:column;align-items:center;gap:14px;max-width:420px;padding:32px;display:flex}.huge-code{letter-spacing:.12em;font:700 56px/1 JetBrains Mono,monospace}.lesson{background:var(--bg);flex-direction:column;height:100%;display:flex;overflow:hidden}.lesson-top{border-bottom:1px solid var(--line);background:#fff;flex-wrap:wrap;align-items:center;gap:14px;padding:10px 16px;display:flex}.lesson-title{min-width:0}.lesson-title h1{white-space:nowrap;text-overflow:ellipsis;font-size:16px;overflow:hidden}.lesson-title small{color:var(--muted);font-size:12px}.code-pill{background:var(--navy);color:#fff;border:0;border-radius:9px;align-items:center;gap:8px;padding:7px 10px;font-size:11px;display:flex}.code-pill span:first-child{color:#9aa3bd;font-weight:600}.code-pill b{letter-spacing:.1em;font:700 16px JetBrains Mono,monospace}.code-pill-copy{background:#2b3453;border-radius:6px;place-items:center;width:24px;height:24px;display:grid}.live-badge{background:var(--green-soft);color:var(--green);white-space:nowrap;border-radius:99px;padding:5px 11px;font-size:12px;font-weight:600}.live-badge.off{color:#9a6a00;background:#fff3d6}.timer-badge{background:var(--blue-soft);color:var(--blue);border-radius:99px;align-items:center;gap:5px;padding:5px 10px;font:700 13px JetBrains Mono,monospace;display:inline-flex}.timer-badge.done{background:var(--red-soft);color:var(--red);animation:1s infinite alternate pulse}@keyframes pulse{to{opacity:.55}}.lesson-actions{flex-wrap:wrap;align-items:center;gap:8px;margin-left:auto;display:flex}.panel-toggle{display:none}.lesson-body{flex:1;gap:12px;min-height:0;padding:12px 0 12px 12px;display:flex}.lesson.no-panel .lesson-body{padding-right:12px}.lesson.no-panel .side-panel{display:none}.toolbar{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:12px;flex-direction:column;align-self:flex-start;gap:4px;padding:6px;display:flex}.tool{width:38px;height:38px;color:var(--ink-2);background:0 0;border:0;border-radius:9px;place-items:center;display:grid}.tool:hover{background:#f2f4f9}.tool.on{background:var(--navy);color:#fff}.tool-sep{background:var(--line);height:1px;margin:4px 6px}.tool-sep.v{width:1px;height:22px;margin:0 4px}.tool-wrap{position:relative}.tool-pop{border:1px solid var(--line);z-index:20;background:#fff;border-radius:10px;gap:4px;padding:5px;display:flex;position:absolute;top:0;left:46px;box-shadow:0 10px 30px #141e3c26}.stage{flex-direction:column;flex:1;gap:10px;min-width:0;display:flex}.stylebar{border:1px solid var(--line);background:#fff;border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px;min-height:46px;padding:7px 12px;display:flex}.stylebar .stylebar{background:0 0;border:0;min-height:0;padding:0}.stylebar select{width:auto;padding:5px 8px;font-size:13px}.stylebar-note{margin-left:auto;font-size:12px}.swatch{width:24px;height:24px;box-shadow:0 0 0 1px var(--line);border:2px solid #fff;border-radius:50%}.swatch.on{box-shadow:0 0 0 2px var(--ink)}.width-btn{background:0 0;border:0;border-radius:7px;place-items:center;width:28px;height:28px;display:grid}.width-btn span{background:var(--ink);border-radius:50%;display:block}.width-btn.on{background:var(--blue-soft)}.green-note{color:var(--green);align-items:center;gap:6px;font-size:13px;font-weight:600;display:inline-flex}.follow{margin:0 0 0 auto;font-size:13px}.board-wrap{background:#e9ecf3;border-radius:14px;flex:1;min-height:0;display:flex;overflow:auto}.board-page{background:#fff;border-radius:10px;flex:none;margin:auto;position:relative;box-shadow:0 2px 12px #141e3c1a}.board-page canvas{border-radius:10px;display:block}.text-editor{z-index:10;position:absolute}.text-editor textarea{resize:none;field-sizing:content;background:#ffffffe6;border-radius:6px;min-width:240px;padding:2px 6px;font-weight:600;line-height:1.2;border:2px dashed var(--blue)!important}.text-editor textarea.is-note{background:#fff4c2;min-height:90px;font-weight:400}.text-editor-hint{color:var(--muted);background:#fff;border-radius:5px;margin-top:4px;padding:2px 6px;font-size:11px;display:inline-block}.symbols{border:1px solid var(--line);max-width:380px;box-shadow:var(--shadow);background:#fff;border-radius:9px;flex-wrap:wrap;gap:3px;margin-bottom:6px;padding:5px;display:flex}.symbols button{background:#f3f5fa;border:0;border-radius:6px;width:30px;height:30px;font-size:16px}.symbols button:hover{background:var(--blue-soft)}.page-bar{justify-content:center;align-items:center;gap:12px;display:flex}.pages,.zoom{border:1px solid var(--line);background:#fff;border-radius:11px;align-items:center;gap:4px;padding:4px;display:flex}.pages button,.zoom button{background:0 0;border:0;border-radius:8px;place-items:center;min-width:32px;height:32px;padding:0 10px;font-weight:600;display:grid}.pages button:hover,.zoom button:hover{background:#f2f4f9}.pages button.on{background:var(--navy);color:#fff}.pages button.add{background:var(--blue-soft);color:var(--blue)}.pages button:disabled{opacity:.35}.page-label{padding:0 8px;font-size:13px;font-weight:600}.zoom span{text-align:center;min-width:48px;font-size:13px;font-weight:600}.side-panel{border-left:1px solid var(--line);background:#fff;flex-direction:column;flex:none;width:320px;min-height:0;margin:-12px 0;display:flex}.side-tabs{border-bottom:1px solid var(--line);display:flex}.side-tabs button{color:var(--muted);background:0 0;border:0;border-bottom:2px solid #0000;flex:1;padding:14px 6px 12px;font-size:13px;font-weight:600}.side-tabs button.on{color:var(--blue);border-bottom-color:var(--blue)}.side-scroll{flex:1;padding:14px;overflow:auto}.side-note{margin:0;padding:10px 14px 0;font-size:12px}.side-poll{border-bottom:1px solid var(--line);max-height:50%;padding:12px;overflow:auto}.waiting-box{background:var(--orange-soft);border-radius:12px;margin-bottom:16px;padding:12px}.waiting-box>.row b{color:var(--orange);font-size:13px}.waiting-row{align-items:center;gap:8px;margin-top:8px;font-weight:600;display:flex}.waiting-row span{flex:1}.list-head{margin-bottom:8px}.reactions-sum{flex-wrap:wrap;gap:12px;margin-bottom:10px;font-size:12px;display:flex}.student-list{margin:0;padding:0;list-style:none}.student-row{align-items:center;gap:10px;padding:8px 0;display:flex}.student-row.offline{opacity:.6}.student-info{flex:1;min-width:0}.student-info b{font-size:13px;display:block}.student-info small{align-items:center;gap:4px;font-size:12px;display:inline-flex}small.orange{color:var(--orange)}small.blue{color:var(--blue)}small.green{color:var(--green)}small.red{color:var(--red)}small.muted{color:var(--muted)}.pen-check{color:var(--muted);align-items:center;gap:6px;margin:0;font-size:12px;font-weight:500;display:flex}.student-row .icon-btn{border:0}.student-row .dropdown{top:30px}.chat{flex-direction:column;flex:1;min-height:0;padding:12px 14px;display:flex}.chat-list{flex-direction:column;flex:1;gap:12px;padding-bottom:8px;display:flex;overflow:auto}.msg-head{color:var(--muted);margin-bottom:3px;font-size:12px}.msg-head b{color:var(--ink)}.bubble{word-wrap:break-word;white-space:pre-wrap;background:#f2f4f8;border-radius:10px;max-width:100%;padding:8px 12px;display:inline-block}.msg.teacher .bubble{background:var(--blue-soft)}.msg.private .bubble{background:#fff6e8;border:1px dashed #f2c9a5}.priv-tag{color:var(--orange);margin-left:6px;font-weight:600}.reply-to{background:var(--orange-soft);border-radius:8px;margin-bottom:6px;padding:6px 10px;font-size:12px}.chat-form{gap:8px;display:flex}.chat-form input{flex:1}.notes{flex:1;padding:12px 14px;display:flex}.notes textarea{resize:none;background:#fffbea;flex:1}.pdf-btn{width:auto;margin:0 14px 14px}.poll-card{border:2px solid var(--blue);border-radius:12px;padding:12px 14px}.poll-card h4{margin:6px 0 10px;font-size:15px}.poll-head{justify-content:space-between;font-size:12px;display:flex}.poll-bar{background:#f3f5fa;border-radius:8px;justify-content:space-between;margin-bottom:6px;padding:7px 10px;font-size:13px;display:flex;position:relative;overflow:hidden}.poll-bar span,.poll-bar b{position:relative}.poll-fill{background:#d8e1ff;transition:width .3s;position:absolute;inset:0 auto 0 0}.poll-card .row{margin-top:8px}.poll-opt{text-align:left;border:1px solid var(--line);background:#fff;border-radius:10px;align-items:center;gap:10px;width:100%;margin-bottom:7px;padding:10px 12px;font-weight:500;display:flex}.poll-opt span:nth-child(2){flex:1}.poll-opt .radio{border:2px solid #b8bfd0;border-radius:50%;flex:none;width:16px;height:16px}.poll-opt.on{border-color:var(--blue);background:var(--blue-soft)}.poll-opt.on .radio{border:5px solid var(--blue)}.reactions button{white-space:nowrap;padding:7px 10px}.reactions button.on.ok{background:var(--green-soft);color:var(--green)}.reactions button.on.fast{background:var(--orange-soft);color:var(--orange)}.reactions button.on.lost{background:var(--red-soft);color:var(--red)}.me-chip{align-items:center;gap:7px;font-weight:600;display:inline-flex}.notice-screen{flex-direction:column;justify-content:center;align-items:center;gap:24px;min-height:100%;padding:20px;display:flex}.notice{text-align:center;flex-direction:column;align-items:center;gap:14px;width:100%;max-width:440px;padding:32px;display:flex}.notice h2{font-size:21px}.notice p{margin:0}.notes-preview{text-align:left;white-space:pre-wrap;background:#fffbea;border-radius:10px;width:100%;padding:12px;font-size:13px}.notes-preview p{margin:4px 0 0}.spinner{border:3px solid var(--blue-soft);border-top-color:var(--blue);border-radius:50%;width:34px;height:34px;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=1200px){.hide-md{display:none}.code-card{grid-template-columns:1fr auto}.code-settings{border-top:1px solid #2d3655;border-left:0;grid-column:1/-1;grid-template-columns:1fr 1fr;column-gap:24px;padding-top:14px;padding-left:0;display:grid}.code-settings .eyebrow{grid-column:1/-1}}@media (width<=1000px){.dash-grid{grid-template-columns:1fr}}@media (width<=900px){.panel-toggle{display:inline-grid}.side-panel{z-index:50;width:min(340px,92vw);margin:0;position:fixed;top:0;bottom:0;right:0;box-shadow:-10px 0 40px #141e3c33}.lesson-body{padding-right:12px}.stylebar-note{display:none}.landing-cards,.dash{grid-template-columns:1fr}.sidebar{z-index:60;width:260px;transition:transform .2s;position:fixed;top:0;left:0;transform:translate(-100%)}.menu-open .sidebar{transform:none}.menu-open .scrim{z-index:55;background:#0f142866;display:block;position:fixed;inset:0}.mobile-only{display:inline-grid!important}.dash-main{padding:18px 16px 40px}.dash-actions{width:100%}.search{flex:1;width:auto}}@media (width<=640px){.hide-sm{display:none}.lesson-top{gap:8px;padding:8px 10px}.lesson-actions{width:100%;margin-left:0}.lesson-body{flex-direction:column;gap:8px;padding:8px}.toolbar{flex-direction:row;align-self:stretch;overflow-x:auto}.tool-sep{width:1px;height:auto;margin:6px 4px}.tool-pop{top:46px;left:0}.code-card{grid-template-columns:1fr;padding:20px}.qr-box{display:none}.code-settings{grid-template-columns:1fr}.big-code{font-size:28px}.two{grid-template-columns:1fr}.landing-top nav{gap:14px}.reactions button{padding:7px 8px;font-size:12px}}.panel-close{display:none!important}@media (width<=900px){.panel-close{z-index:2;position:absolute;top:8px;right:8px;display:inline-grid!important}.side-panel{padding-top:48px}}.admin{flex-direction:column;gap:20px;display:flex}.stat-row{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.stat{padding:16px 18px}.stat small{color:var(--muted);font-size:12px;font-weight:600}.stat b{margin-top:2px;font-size:28px;font-weight:700;display:block}.stat.green b{color:var(--green)}.stat.blue b{color:var(--blue)}.table-wrap{margin:0 -20px;padding:0 20px;overflow-x:auto}.admin-table{border-collapse:collapse;width:100%;font-size:13px}.admin-table th{text-align:left;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);border-bottom:1px solid var(--line);padding:6px 8px;font-size:11px;font-weight:700}.admin-table td{border-bottom:1px solid var(--line-2);vertical-align:middle;padding:10px 8px}.admin-table select{width:auto;padding:5px 8px;font-size:13px}.admin-table .actions{white-space:nowrap;text-align:right}.admin-table .actions .icon-btn{margin-left:4px}.person{align-items:center;gap:9px;display:flex}.person b,.person small{display:block}.person small{color:var(--muted)}.mono{font-family:JetBrains Mono,monospace;font-size:12px}.live-dot{color:var(--green)}.live-list{margin:0;padding:0;list-style:none}.live-list li{border-bottom:1px solid var(--line-2);align-items:center;gap:14px;padding:10px 0;display:flex}.live-list li>div{flex:1;min-width:0}.live-list b,.live-list small{display:block}.live-list small{color:var(--muted)}.live-list code{font:600 13px JetBrains Mono,monospace}@media (width<=640px){.stat-row{grid-template-columns:1fr 1fr}}.graph-modal{max-width:980px}.graph-layout{grid-template-columns:380px 1fr;gap:20px;margin-top:10px;display:grid}.graph-form{flex-direction:column;gap:8px;display:flex}.graph-form .eyebrow{margin-top:8px}.preset-list{flex-wrap:wrap;gap:6px;display:flex}.fn-row{grid-template-columns:34px auto 1fr auto;align-items:center;gap:6px;display:grid}.fn-row input[type=color]{border:1px solid var(--line);background:#fff;border-radius:8px;width:34px;height:34px;padding:2px}.fn-row input.bad{border-color:var(--red)}.fn-prefix{color:var(--ink-2);font-style:italic;font-weight:600}.fn-error{color:var(--red);grid-column:3/-1;font-size:12px}.range-grid{grid-template-columns:1fr 1fr;gap:0 10px;display:grid}.range-grid label{margin:4px 0 0;font-size:12px}.graph-preview{flex-direction:column;gap:6px;display:flex}.graph-preview canvas{background:#fff;border-radius:10px;width:100%}.hint code{background:#f1f3f8;border-radius:4px;padding:1px 4px;font-size:11px}@media (width<=860px){.graph-layout{grid-template-columns:1fr}.graph-preview{order:-1}}.section-stack{flex-direction:column;gap:18px;display:flex}.section-stack>.section-head{margin-bottom:0}.section-head h2 .muted{font-size:14px;font-weight:500}.dropzone{border-radius:var(--radius);text-align:center;cursor:pointer;color:var(--ink-2);background:#fff;border:2px dashed #c5cde0;flex-direction:column;align-items:center;gap:6px;padding:28px;transition:border-color .15s,background .15s;display:flex}.dropzone:hover,.dropzone.over{border-color:var(--blue);background:#f5f8ff}.dropzone svg{color:var(--blue)}.files{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;display:grid}.file-card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;flex-direction:column;display:flex;overflow:hidden}.file-thumb{aspect-ratio:16/10;border-bottom:1px solid var(--line-2);background:#f1f3f8;place-items:center;display:grid;overflow:hidden}.file-thumb img{object-fit:cover;width:100%;height:100%}.file-ext{color:var(--blue);background:var(--blue-soft);border-radius:10px;padding:10px 14px;font:700 18px JetBrains Mono,monospace}.file-body{min-width:0;padding:10px 12px 4px}.file-body b{white-space:nowrap;text-overflow:ellipsis;font-size:13px;display:block;overflow:hidden}.file-body small{font-size:12px}.file-actions{justify-content:flex-end;gap:4px;padding:6px 10px 10px;display:flex}.file-actions .icon-btn{border:0}.history{padding:6px 0}.history-row{border-bottom:1px solid var(--line-2)}.history-row:last-child{border-bottom:0}.history-head{text-align:left;background:0 0;border:0;align-items:center;gap:16px;width:100%;padding:12px 20px;display:flex}.history-head:hover{background:#fafbfd}.history-date{text-align:center;background:var(--blue-soft);width:56px;color:var(--blue);border-radius:10px;flex:none;padding:6px 0}.history-date b,.history-date small{display:block}.history-date small{font-size:11px}.history-title{flex:1;min-width:0}.history-title b,.history-title small{display:block}.history-meta{color:var(--muted);align-items:center;gap:5px;min-width:42px;font-size:13px;font-weight:600;display:inline-flex}.chev{color:var(--muted);flex:none;transition:transform .15s}.history-row.open .chev{transform:rotate(180deg)}.history-body{grid-template-columns:1fr 1fr;gap:10px 28px;padding:4px 20px 18px 92px;display:grid}.history-body p{margin:4px 0 12px;font-size:13px}.history-actions{flex-wrap:wrap;grid-column:1/-1;gap:8px;display:flex}.danger-text{color:var(--red)!important}.poll-summary{margin:6px 0 14px;font-size:13px}.poll-summary>b{margin-bottom:6px;display:block}.poll-bar.correct{box-shadow:inset 0 0 0 2px #9fd8bb}.poll-bar.correct .poll-fill{background:#c9ecd9}.poll-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;display:grid}.poll-item{flex-direction:column;gap:10px;display:flex}.poll-item h4{font-size:15px}.poll-item ol{color:var(--ink-2);flex:1;margin:0;padding-left:20px;font-size:13px}.poll-item li{margin:3px 0}.poll-item li.correct{color:var(--green);font-weight:600}.chip.quiz{background:var(--green-soft);color:var(--green)}.chip.survey{background:var(--blue-soft);color:var(--blue)}.opt-row{margin-top:6px}.opt-row input[type=radio]{width:18px;height:18px;accent-color:var(--green);flex:none;margin:0}.settings-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));align-items:start;gap:18px;display:grid}.setting-check{margin:10px 0 0;font-weight:500}.small{margin:4px 0 0;font-size:13px}.ok-msg{background:var(--green-soft);color:var(--green);border-radius:9px;margin-top:12px;padding:9px 12px;font-size:13px}input:disabled{color:var(--muted);background:#f3f5f9}.mat-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.mat-list li{border:1px solid var(--line);border-radius:10px;align-items:center;gap:10px;padding:8px 10px;display:flex}.mat-list li.shared{background:#f6f8ff;border-color:#b9caf6}.mat-list .mat-name{flex:1;min-width:0}.mat-list .mat-name b,.mat-list .mat-name small{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.mat-list .mat-name b{font-size:13px}.mat-list .mat-name small{color:var(--muted);font-size:11px}.mat-icon{background:var(--blue-soft);width:34px;height:34px;color:var(--blue);border-radius:8px;flex:none;place-items:center;font:700 10px JetBrains Mono,monospace;display:grid;overflow:hidden}.mat-icon img{object-fit:cover;width:100%;height:100%}.poll-opt.correct{background:var(--green-soft);border-color:#8fd1b0}.poll-opt.wrong{background:var(--red-soft);border-color:#f0c2bf}.quiz-note{margin-top:4px;font-size:12px;font-weight:600;display:block}.quiz-note.ok{color:var(--green)}.quiz-note.bad{color:var(--red)}.saved-polls{flex-direction:column;gap:6px;max-height:200px;margin:8px 0 4px;display:flex;overflow:auto}.saved-polls button{text-align:left;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 10px;font-size:13px}.saved-polls button:hover{border-color:var(--blue);background:#f7f9ff}.saved-polls small{color:var(--muted);display:block}@media (width<=640px){.history-body{grid-template-columns:1fr;padding-left:20px}.history-meta{min-width:0}}.side-tabs button{white-space:nowrap;padding-left:4px;padding-right:4px;font-size:12.5px}.mark-list{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.mark-chip{background:#fff;border:1.5px solid;border-radius:999px;align-items:center;gap:6px;padding:3px 6px 3px 10px;font-size:13px;display:inline-flex}.mark-chip button{cursor:pointer;color:#7b8196;background:0 0;border:0;padding:0 2px;font-size:16px;line-height:1}.mark-chip button:hover{color:#d63c3c}
