@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/ba9851c3c22cd980-s.woff2) format("woff2");unicode-range:u+0460-052f,u+1c80-1c8a,u+20b4,u+2de0-2dff,u+a640-a69f,u+fe2e-fe2f}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/21350d82a1f187e9-s.woff2) format("woff2");unicode-range:u+0301,u+0400-045f,u+0490-0491,u+04b0-04b1,u+2116}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/c5fe6dc8356a8c31-s.woff2) format("woff2");unicode-range:u+1f??}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/19cfc7226ec3afaa-s.woff2) format("woff2");unicode-range:u+0370-0377,u+037a-037f,u+0384-038a,u+038c,u+038e-03a1,u+03a3-03ff}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/df0a9ae256c0569c-s.woff2) format("woff2");unicode-range:u+0102-0103,u+0110-0111,u+0128-0129,u+0168-0169,u+01a0-01a1,u+01af-01b0,u+0300-0301,u+0303-0304,u+0308-0309,u+0323,u+0329,u+1ea0-1ef9,u+20ab}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/8e9860b6e62d6359-s.woff2) format("woff2");unicode-range:u+0100-02ba,u+02bd-02c5,u+02c7-02cc,u+02ce-02d7,u+02dd-02ff,u+0304,u+0308,u+0329,u+1d00-1dbf,u+1e00-1e9f,u+1ef2-1eff,u+2020,u+20a0-20ab,u+20ad-20c0,u+2113,u+2c60-2c7f,u+a720-a7ff}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/e4af272ccee01ff0-s.p.woff2) format("woff2");unicode-range:u+00??,u+0131,u+0152-0153,u+02bb-02bc,u+02c6,u+02da,u+02dc,u+0304,u+0308,u+0329,u+2000-206f,u+20ac,u+2122,u+2191,u+2193,u+2212,u+2215,u+feff,u+fffd}@font-face{font-family:Inter Fallback;src:local("Arial");ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.00%;size-adjust:107.12%}.__className_f367f3{font-family:Inter,Inter Fallback;font-style:normal}.__variable_f367f3{--font-inter:"Inter","Inter Fallback"}*{box-sizing:border-box}:root{--brand:#2f7cf6;--brand-dark:#1f63d1;--brand-soft:#e8f0ff;--ink:#1c2129;--ink-dim:#667085;--line:rgba(28,33,41,0.08);--glass:rgba(255,255,255,0.72);--glass-strong:rgba(255,255,255,0.92);--radius-lg:20px;--radius-md:14px;--shadow-soft:0 10px 34px rgba(31,77,209,0.10),0 2px 8px rgba(28,33,41,0.04)}body,html{height:100%}body{margin:0;font-family:var(--font-inter),system-ui,-apple-system,sans-serif;color:var(--ink);background:radial-gradient(900px 600px at 8% -10%,#dbe8ff 0,transparent 60%),radial-gradient(800px 560px at 105% 10%,#e6dcff 0,transparent 55%),radial-gradient(700px 500px at 50% 115%,#dff3ec 0,transparent 55%),#f3f5fa;background-attachment:fixed}h1,h2,h3{letter-spacing:-.02em}.page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.container{max-width:640px;margin:0 auto;padding:40px 20px}button,input,select,textarea{font:inherit}.glass-card{width:100%;max-width:420px;background:var(--glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border:1px solid rgba(255,255,255,.6);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);padding:36px}.brand-mark{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;color:var(--ink);margin-bottom:22px}.brand-dot{width:10px;height:10px;border-radius:4px;background:linear-gradient(135deg,var(--brand),#7aa8ff)}.card-title{font-size:22px;font-weight:700;margin:0 0 6px}.card-subtitle{color:var(--ink-dim);font-size:14px;margin:0 0 24px}.field-label{font-size:13px;font-weight:600;margin-bottom:6px}.field,.field-label{display:block;color:var(--ink)}.field{width:100%;padding:11px 14px;margin:0 0 18px;border:1px solid var(--line);border-radius:var(--radius-md);background:rgba(255,255,255,.7);font-size:14px;transition:border-color .15s ease,box-shadow .15s ease}.field:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);background:white}textarea.field{resize:vertical;min-height:72px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;background:var(--brand);color:white;border:none;border-radius:999px;font-weight:600;font-size:14px;cursor:pointer;transition:background .15s ease,transform .1s ease,box-shadow .15s ease;box-shadow:0 6px 18px rgba(47,124,246,.28)}.btn:hover{background:var(--brand-dark)}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:rgba(255,255,255,.7);color:var(--ink);border:1px solid var(--line);box-shadow:none}.btn-ghost:hover{background:white}.btn-block{width:100%}.btn-sm{padding:8px 14px;font-size:13px}.link-row{margin-top:18px;font-size:14px;color:var(--ink-dim);text-align:center}.link-row a{color:var(--brand);font-weight:600;text-decoration:none}.error{color:#d13a2b;background:#fdeceb;border:1px solid #f6c9c4;border-radius:var(--radius-md)}.error,.notice{padding:10px 14px;font-size:13px;margin-bottom:18px}.notice{color:#1f7a52;background:#e8f7ef;border:1px solid #bfe6d2;border-radius:var(--radius-md)}.app-shell{min-height:100vh;display:flex}.sidebar{width:232px;flex-shrink:0;padding:24px 16px;background:var(--glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border-right:1px solid rgba(255,255,255,.6)}.sidebar,.sidebar-nav{display:flex;flex-direction:column}.sidebar-nav{margin-top:28px;gap:4px}.sidebar-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-md);font-size:14px;font-weight:500;color:var(--ink-dim)}.sidebar-link-active{background:var(--brand-soft);color:var(--brand-dark)}.sidebar-footer{margin-top:auto}.app-main{flex:1 1;min-width:0;padding:32px 40px}.app-topbar{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:12px}.app-topbar h1{font-size:26px;margin:0}.app-topbar p{color:var(--ink-dim);margin:4px 0 0;font-size:14px}.panel{background:var(--glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border:1px solid rgba(255,255,255,.6);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);padding:24px;margin-bottom:20px}.panel-title{font-size:15px;font-weight:700;margin:0 0 16px}.form-row{display:flex;gap:16px;flex-wrap:wrap}.form-row>*{flex:1 1;min-width:220px}.lecture-card{background:var(--glass-strong);border:1px solid rgba(255,255,255,.7);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);padding:22px;margin-bottom:16px}.lecture-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:4px}.lecture-card-head h3{margin:0;font-size:17px}.lecture-meta{color:var(--ink-dim);font-size:13px;margin:0 0 16px}.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}.badge-scheduled{background:#eef1f6;color:var(--ink-dim)}.badge-live{background:#fdecec;color:#d13a2b}.badge-live:before{content:"";width:6px;height:6px;border-radius:50%;background:#d13a2b}.badge-ended{background:#eef1f6;color:var(--ink-dim)}.lecture-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}.empty-state{text-align:center;padding:48px 20px;color:var(--ink-dim)}.join-spinner{width:28px;height:28px;border-radius:50%;border:3px solid var(--brand-soft);border-top-color:var(--brand);margin:8px auto 0;animation:join-spin .8s linear infinite}@keyframes join-spin{to{transform:rotate(1turn)}}.attendance-report{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}.attendance-empty,.attendance-loading{color:var(--ink-dim);font-size:13px}.attendance-table{width:100%;border-collapse:collapse;font-size:13px}.attendance-table th{text-align:left;color:var(--ink-dim);font-weight:600}.attendance-table td,.attendance-table th{padding:6px 8px;border-bottom:1px solid var(--line)}.attendance-table td{color:var(--ink)}.attendance-noshows{margin-top:10px;font-size:12px;color:var(--ink-dim)}.room{--room-bg:#14171c;--room-surface:#1c2129;--room-border:#2a303b;--room-text:#f1f2f4;--room-text-dim:#8b93a1;--room-amber:#e2b93b;--room-red:#e2513b;background:var(--room-bg);color:var(--room-text)}.room,.room-status{min-height:100vh;display:flex;flex-direction:column;font-family:system-ui,-apple-system,sans-serif}.room-status{background:#14171c;color:#f1f2f4;align-items:center;justify-content:center;gap:14px;text-align:center;padding:20px}.room-status-error{color:#ff8a75}.room-spinner{width:28px;height:28px;border-radius:50%;border:3px solid #2a303b;border-top-color:#e2b93b;animation:room-spin .8s linear infinite}@keyframes room-spin{to{transform:rotate(1turn)}}.room-header{justify-content:space-between;padding:14px 24px;border-bottom:1px solid var(--room-border)}.room-header,.room-header-left{display:flex;align-items:center}.room-header-left{gap:8px}.live-dot{width:9px;height:9px;border-radius:50%;background:var(--room-amber);box-shadow:0 0 0 0 rgba(226,185,59,.6);animation:room-pulse 1.8s ease-out infinite}@keyframes room-pulse{0%{box-shadow:0 0 0 0 rgba(226,185,59,.55)}70%{box-shadow:0 0 0 8px rgba(226,185,59,0)}to{box-shadow:0 0 0 0 rgba(226,185,59,0)}}.room-live-label{font-size:13px;font-weight:600;letter-spacing:.03em;color:var(--room-amber);text-transform:uppercase}.room-timer{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;margin-left:6px}.room-count,.room-timer{font-size:13px;color:var(--room-text-dim)}.room-main{flex:1 1;display:flex;flex-direction:column;gap:14px;padding:20px 24px 24px;min-height:0}.tile{background:var(--room-surface);border:1px solid var(--room-border);border-radius:14px;overflow:hidden;position:relative;transition:border-color .15s ease}.tile.is-speaking{border-color:var(--room-amber)}.tile video{width:100%;height:100%;object-fit:cover;display:block}.tile-spotlight{flex:1 1;min-height:0}.tile-avatar{width:100%;height:100%;min-height:240px;display:flex;align-items:center;justify-content:center;font-size:48px;font-weight:600;color:var(--room-text-dim);background:#20252d}.tile-label{position:absolute;bottom:10px;left:12px;font-size:13px;color:var(--room-text);background:rgba(20,23,28,.65);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:4px 10px;border-radius:999px}.filmstrip{display:flex;gap:12px;overflow-x:auto;padding-bottom:4px}.tile-thumb{flex:0 0 auto;width:180px;height:120px}.tile-thumb .tile-avatar{min-height:0;font-size:28px}.control-bar{gap:12px;padding:18px}.control-bar,.ctrl-btn{display:flex;justify-content:center}.ctrl-btn{position:relative;width:48px;height:48px;border-radius:50%;border:1px solid var(--room-border);background:var(--room-surface);color:var(--room-text);align-items:center;cursor:pointer;transition:background .15s ease,border-color .15s ease}.ctrl-btn:hover{border-color:#3a4150}.ctrl-btn-off{background:#2a303b;color:var(--room-text-dim)}.proctor-debug{position:fixed;width:220px;background:var(--room-surface);border:1px solid var(--room-border);border-radius:12px;padding:8px;z-index:5}.proctor-debug-label{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--room-text-dim);margin-bottom:6px;cursor:-webkit-grab;cursor:grab;-webkit-user-select:none;-moz-user-select:none;user-select:none;touch-action:none}.proctor-debug-label:active{cursor:-webkit-grabbing;cursor:grabbing}.proctor-debug-drag-dots{font-size:13px;line-height:1;opacity:.6}.proctor-debug-stage{position:relative;width:100%;aspect-ratio:4/3;border-radius:8px;overflow:hidden;background:#000;transform:scaleX(-1)}.proctor-debug-video{object-fit:cover}.proctor-debug-canvas,.proctor-debug-video{position:absolute;inset:0;width:100%;height:100%}.hands-panel{position:fixed;top:68px;left:20px;width:240px;max-height:calc(100vh - 140px);overflow-y:auto;background:var(--room-surface);border:1px solid var(--room-border);border-radius:14px;padding:14px;z-index:5}.hands-panel h4{margin:0 0 10px;font-size:13px;color:var(--room-text)}.hands-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.hands-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;background:rgba(226,185,59,.08);border-left:3px solid var(--room-amber)}.hands-order{font-size:11px;font-weight:700;color:var(--room-amber);width:16px;text-align:center;flex-shrink:0}.hands-name{flex:1 1;font-size:13px;color:var(--room-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hands-dismiss{width:22px;height:22px;border-radius:50%;border:none;background:rgba(255,255,255,.08);color:var(--room-text-dim);cursor:pointer;font-size:12px;flex-shrink:0}.hands-dismiss:hover{background:var(--room-amber);color:#1a1608}.hand-badge{position:absolute;top:10px;right:10px;font-size:20px;filter:drop-shadow(0 1px 3px rgba(0,0,0,.5));animation:hand-wave 1.4s ease-in-out infinite;z-index:2}.hand-badge-sm{font-size:14px;top:6px;right:6px}@keyframes hand-wave{0%,to{transform:rotate(0deg)}25%{transform:rotate(-15deg)}75%{transform:rotate(15deg)}}.proctor-active-badge{font-size:11px;font-weight:600;color:#8fd6a8;background:rgba(79,174,121,.15);border:1px solid rgba(79,174,121,.35);padding:3px 10px;border-radius:999px;margin-left:10px}.proctor-panel{position:fixed;top:68px;right:20px;width:260px;max-height:calc(100vh - 140px);overflow-y:auto;background:var(--room-surface);border:1px solid var(--room-border);border-radius:14px;padding:14px;z-index:5}.proctor-panel-header{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:none;padding:0;margin:0 0 10px;cursor:pointer;color:inherit}.proctor-panel-header h4{margin:0;font-size:13px;color:var(--room-text)}.proctor-panel-header-right{display:flex;align-items:center;gap:8px}.proctor-count{font-size:11px;font-weight:700;color:#1a1608;background:var(--room-amber);border-radius:999px;padding:1px 7px;min-width:16px;text-align:center}.proctor-chevron{font-size:12px;color:var(--room-text-dim);transition:transform .15s ease}.proctor-chevron-collapsed{transform:rotate(-90deg)}.proctor-empty{color:var(--room-text-dim);font-size:13px;margin:0}.proctor-list{list-style:none;margin:0;padding:0;gap:8px}.proctor-item,.proctor-list{display:flex;flex-direction:column}.proctor-item{gap:2px;padding:8px 10px;border-radius:10px;border-left:3px solid var(--room-border);background:rgba(255,255,255,.03)}.proctor-item-multiple_people{border-left-color:var(--room-red)}.proctor-item-no_face{border-left-color:var(--room-amber)}.proctor-item-gaze_away{border-left-color:#3b8ae2}.proctor-student{font-size:12px;font-weight:600;color:var(--room-text)}.proctor-type{font-size:12px;color:var(--room-text-dim)}.proctor-time{font-size:11px;color:var(--room-text-dim);opacity:.7}.ctrl-btn-active{background:var(--room-amber);border-color:var(--room-amber);color:#1a1608}.ctrl-badge{position:absolute;top:-4px;right:-4px;min-width:18px;height:18px;border-radius:999px;background:var(--room-red);color:white;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 4px}.chat-panel{position:fixed;bottom:90px;right:20px;width:300px;height:400px;background:var(--room-surface);border:1px solid var(--room-border);border-radius:14px;z-index:5;display:flex;flex-direction:column;overflow:hidden}.chat-panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--room-border)}.chat-panel-header h4{margin:0;font-size:13px;color:var(--room-text)}.chat-close{background:none;border:none;color:var(--room-text-dim);font-size:18px;line-height:1;cursor:pointer;padding:0 4px}.chat-close:hover{color:var(--room-text)}.chat-list{flex:1 1;overflow-y:auto;padding:12px 14px;display:flex;flex-direction:column;gap:8px}.chat-empty{color:var(--room-text-dim);font-size:13px;margin:auto 0;text-align:center}.chat-bubble-row{display:flex;justify-content:flex-start}.chat-bubble-row-me{justify-content:flex-end}.chat-bubble{max-width:80%;background:#262b34;border-radius:12px;padding:7px 10px;display:flex;flex-direction:column;gap:2px}.chat-bubble-me{background:var(--room-amber);color:#1a1608}.chat-sender{font-size:11px;font-weight:600;color:var(--room-amber)}.chat-bubble-me .chat-sender{color:#1a1608}.chat-text{font-size:13px;color:var(--room-text);word-break:break-word}.chat-bubble-me .chat-text{color:#1a1608}.chat-time{font-size:10px;color:var(--room-text-dim);align-self:flex-end}.chat-bubble-me .chat-time{color:rgba(26,22,8,.6)}.chat-input-row{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--room-border)}.chat-input{flex:1 1;background:#20252d;border:1px solid var(--room-border);border-radius:999px;padding:8px 14px;color:var(--room-text);font-size:13px}.chat-input:focus{outline:none;border-color:var(--room-amber)}.chat-send{width:34px;height:34px;border-radius:50%;border:none;background:var(--room-amber);color:#1a1608;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.chat-send:disabled{opacity:.4;cursor:not-allowed}.reaction-picker-wrap{position:relative}.reaction-picker{position:absolute;bottom:58px;left:50%;transform:translateX(-50%);display:flex;gap:6px;background:var(--room-surface);border:1px solid var(--room-border);border-radius:999px;padding:8px 10px;box-shadow:0 8px 24px rgba(0,0,0,.35)}.reaction-picker-emoji{background:none;border:none;font-size:22px;cursor:pointer;padding:2px;transition:transform .1s ease}.reaction-picker-emoji:hover{transform:scale(1.25)}.reactions-overlay{position:fixed;inset:0;pointer-events:none;z-index:20;overflow:hidden}.floating-reaction{position:absolute;bottom:90px;font-size:36px;animation:reaction-float 2.5s ease-out forwards}@keyframes reaction-float{0%{transform:translateY(0) scale(.5);opacity:0}15%{transform:translateY(-40px) scale(1.1);opacity:1}to{transform:translateY(-320px) scale(1);opacity:0}}.tile-mod-controls{position:absolute;bottom:6px;right:6px;display:flex;gap:4px;opacity:0;transition:opacity .15s ease}.tile-spotlight:hover .tile-mod-controls,.tile-thumb:hover .tile-mod-controls{opacity:1}.tile-mod-btn{width:22px;height:22px;border-radius:50%;border:none;background:rgba(20,23,28,.75);color:white;font-size:11px;display:flex;align-items:center;justify-content:center;cursor:pointer}.tile-mod-btn:hover{background:rgba(20,23,28,.95)}.tile-mod-btn-active{background:var(--room-amber)}.tile-mod-btn-danger:hover{background:var(--room-red)}.whiteboard{flex:1 1;min-height:0;display:flex;flex-direction:column;background:#fbfaf7;border:1px solid var(--room-border);border-radius:14px;overflow:hidden;box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}.whiteboard-toolbar{padding:8px 12px;background:#efece4;border-bottom:1px solid #ddd8c9}.wb-group,.whiteboard-toolbar{display:flex;align-items:center;gap:6px}.wb-divider{width:1px;height:22px;background:#d4cfc0;margin:0 4px}.wb-spacer{flex:1 1}.wb-tool{width:32px;height:32px;border-radius:8px;border:1px solid transparent;background:transparent;color:#5a5648;display:flex;align-items:center;justify-content:center;cursor:pointer}.wb-tool:hover{background:#e2ddcf}.wb-tool-active{background:#22252b;color:white}.wb-swatch{width:22px;height:22px;border-radius:50%;border:2px solid transparent;cursor:pointer;padding:0}.wb-swatch-active{border-color:#22252b;box-shadow:0 0 0 2px #fbfaf7}.wb-size{width:30px;height:30px;border-radius:8px;border:1px solid transparent;background:transparent;display:flex;align-items:center;justify-content:center;cursor:pointer}.wb-size-active,.wb-size:hover{background:#e2ddcf}.wb-size-active{border-color:#c9c3b3}.wb-size-dot{border-radius:50%;background:#40403a;display:inline-block}.wb-btn{border:1px solid #c9c3b3;background:white;color:#22252b;padding:6px 12px;border-radius:8px;font-size:13px;font-weight:500;cursor:pointer;margin-left:6px}.wb-btn:hover{background:#f4f1ea}.wb-btn-close{background:#22252b;color:white;border-color:#22252b}.wb-btn-close:hover{background:#34383f}.whiteboard-surface{position:relative;flex:1 1;min-height:0;background-color:#fbfaf7;background-image:radial-gradient(#ddd8c9 1px,transparent 0);background-size:22px 22px;cursor:none}.whiteboard-canvas{width:100%;height:100%;touch-action:none;display:block}.wb-brush-cursor{position:absolute;border:2px solid #22252b;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;opacity:0;transition:opacity .1s ease}.wb-brush-cursor.wb-cursor-visible{opacity:1}.wb-brush-cursor-eraser{border-color:#8b93a1!important;border-style:dashed;background:rgba(139,147,161,.12)}.ctrl-btn-leave{background:var(--room-red);border-color:var(--room-red);color:white}.ctrl-btn-leave:hover{background:#cf4530;border-color:#cf4530}