:root{--z-float: 45;--z-menu: 75;--z-modal: 90;font-family:Vazirmatn,IRANSans,Tahoma,Arial,sans-serif;color:#e5edf8;background:#07111f;--bg: #07111f;--panel: rgba(15, 23, 42, .86);--panel-strong: #111c2f;--line: rgba(148, 163, 184, .18);--muted: #94a3b8;--text: #e5edf8;--primary: #38bdf8;--primary-strong: #2563eb;--danger: #fb7185;--success: #22c55e;--warning: #f59e0b;--shadow: 0 20px 60px rgba(2, 8, 23, .38)}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0;overflow:hidden}body{direction:rtl;background:radial-gradient(circle at top right,rgba(37,99,235,.22),transparent 34%),var(--bg)}button,input{font:inherit}button{border:0;cursor:pointer}button,[data-tooltip]{-webkit-tap-highlight-color:transparent}[data-tooltip]{position:relative}.app-shell{width:100%;height:100%;padding:12px;overflow:hidden}.classroom{position:relative;display:grid;grid-template-rows:62px minmax(0,1fr) 72px;gap:10px;width:100%;height:100%;min-width:0;overflow:hidden}.classroom.toolbar-hidden{grid-template-rows:62px minmax(0,1fr) 0}.class-header,.stage-card,.side-panel,.bottom-toolbar{border:1px solid var(--line);background:linear-gradient(145deg,#0f172af0,#0f172ab8);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.class-header{display:flex;align-items:center;justify-content:space-between;gap:14px;min-width:0;padding:10px 14px;border-radius:22px}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:16px;color:#fff;background:linear-gradient(135deg,#2563eb,#06b6d4);font-weight:950}.brand small,.stage-top small,.side-head small,.panel-title small{display:block;color:var(--muted);font-size:11px}h1,h2,p{margin:0}h1{overflow:hidden;color:#fff;font-size:16px;text-overflow:ellipsis;white-space:nowrap}h2{color:#fff;font-size:18px}.header-status{display:flex;align-items:center;gap:8px;min-width:0}.header-icon-btn{display:inline-grid;place-items:center;flex:0 0 auto;width:38px;height:38px;border:1px solid var(--line);border-radius:14px;color:#e2e8f0;background:#94a3b81a;transition:transform .16s ease,border-color .16s ease,background .16s ease,color .16s ease}.header-icon-btn:hover:not(:disabled),.header-icon-btn:focus-visible{color:#fff;border-color:#38bdf87a;background:#2563eb59;transform:translateY(-1px)}.header-icon-btn:disabled{cursor:not-allowed;opacity:.48}.chip{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:7px 10px;border:1px solid var(--line);border-radius:999px;color:#cbd5e1;background:#94a3b81a;font-size:12px;white-space:nowrap}.chip.stable{color:#bbf7d0;background:#22c55e1f}.recording-indicator{display:inline-flex;align-items:center;gap:7px;min-height:32px;padding:7px 11px;border:1px solid rgba(248,113,113,.38);border-radius:999px;color:#fff1f2;background:linear-gradient(135deg,#dc2626eb,#b91c1cc7);box-shadow:0 10px 24px #dc262638;font-size:12px;font-weight:900;white-space:nowrap}.recording-dot{width:8px;height:8px;border-radius:999px;background:#fff;box-shadow:0 0 0 4px #ffffff2e;animation:recording-pulse 1.45s ease-in-out infinite}@keyframes recording-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.68;transform:scale(.82)}}.class-main{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:10px;min-height:0;overflow:hidden}.stage-card,.side-panel{min-width:0;min-height:0;border-radius:26px;overflow:hidden}.stage-card{display:grid;grid-template-rows:auto minmax(0,1fr)}.stage-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line)}.mode-switch,.panel-tabs,.toolbar-controls,.filter-row{display:flex;align-items:center;gap:7px;min-width:0}.pill,.tab,.filter{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:8px 11px;border:1px solid var(--line);border-radius:999px;color:#cbd5e1;background:#94a3b81a;font-size:12px;font-weight:800}.pill.active,.tab.active,.filter.active{color:#fff;border-color:#38bdf87a;background:#2563eb6b}.stage-content{min-height:0;overflow:hidden}.side-panel{display:grid;grid-template-rows:auto auto minmax(0,1fr)}.side-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 12px 8px}.panel-tabs.desktop{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:6px;padding:0 10px 10px;overflow:hidden}.tab{display:grid;grid-template-rows:18px auto;gap:2px;min-width:0;min-height:48px;padding:6px 4px;border-radius:16px;white-space:nowrap}.tab span{font-size:15px;line-height:1}.tab b{overflow:hidden;max-width:100%;font-size:10.5px;line-height:1.4;text-overflow:ellipsis;white-space:nowrap}.side-body{min-height:0;overflow:hidden}.side-collapsed{grid-template-columns:minmax(0,1fr) 0}.side-collapsed .side-panel{opacity:0;pointer-events:none}.panel-restore{position:absolute;top:16px;left:12px;z-index:var(--z-float);display:none;width:40px;height:40px;border:1px solid rgba(56,189,248,.35);border-radius:999px;color:#fff;background:#2563ebeb;box-shadow:0 14px 34px #0208175c}.side-collapsed .panel-restore{display:block}.icon-btn,.round-control,.mini-menu,.row-more,.toolbar-hide,.show-toolbar,.restore-camera,.tile-control{position:relative;display:inline-grid;place-items:center;flex:0 0 auto;border:1px solid var(--line);color:#e5edf8;background:#94a3b81f;transition:.16s ease}.icon-btn{width:38px;height:38px;border-radius:14px}.icon-btn:hover,.round-control:hover,.mini-menu:hover,.row-more:hover{transform:translateY(-1px);border-color:#38bdf86b}.icon-btn.active,.round-control.active{color:#fff;background:#2563ebb8;border-color:#38bdf894}.icon-btn.danger,.round-control.end{color:#fff;background:#f43f5ec7;border-color:#fb718573}.icon-btn.ghost{background:transparent}.whiteboard-view{display:grid;grid-template-rows:auto minmax(0,1fr);gap:10px;height:100%;padding:12px;min-height:0}.whiteboard-toolbar{display:flex;align-items:center;gap:7px;max-width:100%;min-width:0;overflow-x:auto;padding:7px;border:1px solid var(--line);border-radius:18px;background:#0206174d;scrollbar-width:thin}.tool-field{display:inline-flex;align-items:center;gap:7px;flex:0 0 auto;height:38px;padding:5px 9px;border:1px solid var(--line);border-radius:14px;color:#cbd5e1;background:#94a3b81a;font-size:11px;font-weight:800}.tool-field input[type=color]{width:26px;height:26px;padding:0;border:0;border-radius:8px;background:transparent}.tool-field input[type=range]{width:86px;accent-color:var(--primary)}.board-wrap{position:relative;min-height:0;overflow:hidden;border:1px solid rgba(15,23,42,.15);border-radius:22px;background:#fff;box-shadow:inset 0 0 0 1px #0f172a0f}#whiteboard{display:block;width:100%;height:100%;background:#fff;cursor:crosshair;touch-action:none;user-select:none;-webkit-user-select:none}.presentation-view,.screen-view{display:grid;place-items:center;height:100%;padding:20px}.presentation-view img,.screen-view video{max-width:100%;max-height:100%;border-radius:20px;box-shadow:var(--shadow)}.presentation-empty,.screen-empty{width:min(520px,100%);padding:34px;border:1px dashed rgba(148,163,184,.35);border-radius:24px;color:#cbd5e1;text-align:center;background:#0f172a7a}.presentation-empty b,.screen-empty b{display:block;margin-bottom:8px;color:#fff;font-size:20px}.camera-dock{padding:0 12px 10px}.camera-dock--hidden{display:none;padding:0}.camera-float{display:none}.camera-float--hidden{display:none!important}.panel-is-collapsed .camera-float{position:fixed;top:max(86px,calc(env(safe-area-inset-top,0px) + 86px));right:max(16px,calc(env(safe-area-inset-right,0px) + 16px));z-index:var(--z-float);display:block;width:min(180px,calc(100vw - 32px))}.camera-tile{position:relative;z-index:12;width:min(180px,100%);margin-inline-start:auto;transition:opacity .18s ease,transform .18s ease}.camera-frame{position:relative;height:112px;overflow:hidden;border:1px solid rgba(255,255,255,.16);border-radius:22px;background:linear-gradient(145deg,#0b1220,#1e293b);box-shadow:0 16px 38px #02081757}.camera-frame:after{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,#02061700 45%,#020617b8);content:""}.camera-frame video{width:100%;height:100%;object-fit:cover}.teacher-avatar{display:grid;place-items:center;align-content:center;gap:6px;height:100%;color:#cbd5e1;font-size:11px}.teacher-avatar b{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;color:#fff;background:linear-gradient(135deg,#2563eb,#06b6d4);font-size:20px}.teacher-name,.camera-status,.camera-controls{position:absolute;z-index:1}.teacher-name{right:8px;bottom:8px;max-width:calc(100% - 82px);overflow:hidden;padding:5px 8px;border-radius:999px;color:#fff;background:#020617b8;font-size:11px;text-overflow:ellipsis;white-space:nowrap}.camera-status{top:8px;right:8px;display:grid;place-items:center;width:18px;height:18px;border:2px solid rgba(2,6,23,.74);border-radius:50%;color:transparent;background:var(--danger);box-shadow:0 0 0 4px #02061733}.camera-status.on{background:var(--success)}.camera-controls{left:8px;bottom:8px;display:flex;gap:5px}.tile-control{width:30px;height:30px;border-radius:999px;background:#020617b3;font-size:12px}.tile-control.active{border-color:#38bdf870;color:#e0f2fe;background:#2563eb94}.restore-camera{position:fixed;top:max(88px,calc(env(safe-area-inset-top,0px) + 88px));right:max(18px,calc(env(safe-area-inset-right,0px) + 18px));z-index:calc(var(--z-float) + 2);width:46px;height:46px;border-radius:50%;background:#2563ebf0;box-shadow:0 14px 34px #0208176b}.panel-section{display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:10px;height:100%;min-height:0;padding:0 12px 12px}.student-panel{grid-template-rows:auto auto auto minmax(0,1fr)}.panel-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.mini-menu,.row-more{width:32px;height:32px;border-radius:12px}.search,.chat-input input{width:100%;min-height:40px;border:1px solid var(--line);border-radius:14px;outline:0;color:#fff;background:#0206174d;padding:0 12px}.filter-row{width:100%;gap:6px;overflow:hidden;padding:2px;border:1px solid rgba(148,163,184,.12);border-radius:999px;background:#02061738}.filter{flex:1 1 0;min-width:0;min-height:32px;padding:6px 8px;border-radius:999px;font-size:11px;line-height:1;white-space:nowrap}.filter.active{box-shadow:inset 0 0 0 1px #ffffff14}.student-list,.messages,.file-list,.assistant-log{min-height:0;overflow-y:auto;padding-left:4px;scrollbar-width:thin}.student-row{display:grid;grid-template-columns:38px minmax(0,1fr) 10px auto;align-items:center;gap:9px;margin-bottom:8px;padding:9px;border:1px solid var(--line);border-radius:16px;background:#0f172a7a}.avatar{display:grid;place-items:center;width:38px;height:38px;border-radius:14px;color:#fff;font-weight:900}.student-copy{min-width:0}.student-copy strong{display:block;overflow:hidden;color:#fff;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.student-copy small{color:var(--muted);font-size:11px}.dot{width:9px;height:9px;border-radius:50%;background:#64748b}.dot.active{background:var(--success);box-shadow:0 0 0 4px #22c55e1f}.dot.listening{background:var(--primary)}.dot.idle{background:var(--warning)}.dot.issue,.dot.offline{background:var(--danger)}.student-icons{display:flex;align-items:center;gap:5px;color:#94a3b8}.student-icons .on{color:#7dd3fc}.media-state{position:relative;display:inline-grid;place-items:center;width:24px;height:24px;border-radius:9px;background:#94a3b814;font-size:13px}.messages{display:flex;flex:1 1 auto;flex-direction:column;gap:8px;min-height:0;overflow-y:auto}.message{max-width:84%;align-self:flex-start;padding:8px 10px;border-radius:16px 16px 16px 5px;color:#dbeafe;background:#1e293bd1;font-size:12px}.message.mine{align-self:flex-end;border-radius:16px 16px 5px;color:#fff;background:#2563ebb8}.message small{color:#e2e8f0b8;font-size:10px}.message p{margin-top:3px;line-height:1.7}.chat-input{display:grid;flex:0 0 auto;grid-template-columns:minmax(0,1fr) 40px;gap:7px;margin-top:auto;padding-top:8px;border-top:1px solid var(--line)}.file-list{display:flex;flex-direction:column;gap:8px}.file-row{display:grid;grid-template-columns:28px minmax(0,1fr);gap:8px;width:100%;padding:11px;border:1px solid var(--line);border-radius:16px;color:#e2e8f0;background:#0f172a7a;text-align:right}.file-row.active{border-color:#38bdf875;background:#2563eb47}.file-row strong,.file-row small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-row small{grid-column:2;color:var(--muted)}.quick-prompts{display:flex;flex-wrap:wrap;gap:7px}.quick-prompts button,.assistant-msg{border:1px solid var(--line);border-radius:15px;color:#dbeafe;background:#94a3b81a;padding:9px 10px;font-size:12px}.assistant-log{display:flex;flex-direction:column;gap:8px}.assistant-msg.user{align-self:flex-end;background:#2563eb6b}.hidden-input{display:none}.bottom-toolbar{position:relative;display:flex;align-items:center;justify-content:center;min-height:72px;border-radius:24px;padding:8px 48px}.toolbar-controls{justify-content:center;max-width:100%}.round-control{width:52px;height:52px;border-radius:18px}.round-control span{font-size:19px;line-height:1}.round-control small{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.toolbar-hide{position:absolute;right:12px;top:50%;width:32px;height:32px;transform:translateY(-50%);border-radius:12px}.show-toolbar{position:fixed;right:50%;bottom:max(14px,calc(env(safe-area-inset-bottom,0px) + 14px));z-index:var(--z-float);width:46px;height:38px;transform:translate(50%);border-radius:999px;background:#2563ebf0;box-shadow:0 14px 34px #02081761}.more-menu{position:absolute;bottom:calc(100% + 8px);left:50%;z-index:35;display:grid;gap:6px;width:210px;padding:8px;border:1px solid var(--line);border-radius:18px;background:#0f172af5;box-shadow:var(--shadow);transform:translate(-50%)}.more-menu button{display:flex;align-items:center;gap:8px;min-height:38px;border-radius:12px;color:#e5edf8;background:transparent;padding:8px 10px;text-align:right}.more-menu button:hover,.more-menu button:focus-visible{outline:0;background:#94a3b81f}.more-menu .teacher-hand-action{color:#fff7ed;background:#ff53521a}.more-menu .teacher-hand-action:hover,.more-menu .teacher-hand-action:focus-visible{background:#ff53522e}.more-menu .teacher-hand-action .ui-icon{color:#fecaca}.context-menu{position:fixed;top:var(--menu-top);left:var(--menu-left);z-index:var(--z-menu);display:grid;gap:6px;width:min(232px,calc(100vw - 16px));padding:8px;border:1px solid rgba(148,163,184,.24);border-radius:18px;background:#0f172afa;box-shadow:var(--shadow)}.context-menu-head{padding:6px 8px 8px;border-bottom:1px solid var(--line)}.context-menu-head strong,.context-menu-head small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.context-menu-head strong{color:#fff;font-size:13px}.context-menu-head small{color:var(--muted);font-size:11px;margin-top:2px}.context-menu button{display:flex;align-items:center;gap:9px;min-height:38px;padding:8px 10px;border-radius:12px;color:#e5edf8;background:transparent;text-align:right;font-size:12px}.context-menu button:hover,.context-menu button:focus-visible{outline:0;background:#38bdf821}.context-menu.compact{width:min(220px,calc(100vw - 16px))}.toast{position:fixed;top:84px;left:50%;z-index:80;max-width:min(90vw,420px);padding:10px 14px;border:1px solid rgba(56,189,248,.35);border-radius:999px;color:#fff;background:#0f172af5;box-shadow:var(--shadow);transform:translate(-50%)}.modal{position:fixed;inset:0;z-index:var(--z-modal);display:grid;place-items:center;background:#020617b8}.modal-card{width:min(92vw,360px);padding:24px;border:1px solid var(--line);border-radius:24px;color:#dbeafe;background:#0f172a;text-align:center;box-shadow:var(--shadow)}.modal-icon{font-size:38px}.modal-actions{display:flex;justify-content:center;gap:8px;margin-top:18px}.modal-actions button{min-height:40px;padding:0 14px;border-radius:13px;color:#fff;background:#94a3b826}.modal-actions .danger{background:#f43f5ed1}.detail-card{text-align:right}.detail-card .modal-icon,.detail-card h2{text-align:center}.student-detail-list{display:grid;gap:8px;margin:16px 0 0}.student-detail-list div{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 10px;border:1px solid var(--line);border-radius:13px;background:#94a3b814}.student-detail-list dt{color:var(--muted);font-size:11px}.student-detail-list dd{margin:0;color:#fff;font-size:12px;font-weight:800}@media(hover:hover)and (pointer:fine){[data-tooltip]:after{position:absolute;left:50%;bottom:calc(100% + 9px);z-index:95;width:max-content;max-width:180px;padding:6px 9px;border:1px solid rgba(148,163,184,.24);border-radius:10px;color:#f8fafc;background:#020617f5;box-shadow:0 12px 30px #02081759;content:attr(data-tooltip);font-size:11px;font-weight:800;line-height:1.45;opacity:0;pointer-events:none;text-align:center;transform:translate(-50%,4px);transition:opacity .14s ease,transform .14s ease;white-space:nowrap}[data-tooltip]:hover:after,[data-tooltip]:focus-visible:after{opacity:1;transform:translate(-50%)}.panel-tabs [data-tooltip]:after,.mobile-nav [data-tooltip]:after{bottom:auto;top:calc(100% + 8px);transform:translate(-50%,-4px)}.panel-tabs [data-tooltip]:hover:after,.panel-tabs [data-tooltip]:focus-visible:after,.mobile-nav [data-tooltip]:hover:after,.mobile-nav [data-tooltip]:focus-visible:after{transform:translate(-50%)}.toolbar-hide[data-tooltip]:after{right:0;left:auto;transform:translateY(4px)}.toolbar-hide[data-tooltip]:hover:after,.toolbar-hide[data-tooltip]:focus-visible:after{transform:translate(0)}}@media(max-width:1024px){.class-main{grid-template-columns:minmax(0,1fr) 300px}.optional{display:none}}@media(max-width:768px){.app-shell{padding:8px}.classroom{grid-template-rows:56px minmax(0,1fr) 62px 58px;gap:7px}.classroom.toolbar-hidden{grid-template-rows:56px minmax(0,1fr) 0 58px}.class-header{padding:8px 10px;border-radius:18px}.brand-mark{width:36px;height:36px;border-radius:13px}.brand small{display:none}.header-icon-btn{width:34px;height:34px;border-radius:12px}h1{font-size:13px}.header-status{margin-right:auto}.recording-indicator{padding-inline:9px;font-size:11px}.chip{min-height:30px;padding:5px 8px;font-size:11px}.chip.stable{display:none}.class-main,.side-collapsed{display:block;min-height:0}.stage-card{height:100%;border-radius:20px}.stage-top{min-height:54px;padding:8px 10px}.stage-top h2{font-size:14px}.mode-switch{gap:5px}.pill{min-height:34px;padding:7px 8px;font-size:11px}.side-panel,.panel-restore,.camera-dock{display:none}.stage-content>.panel-section{padding:10px}.whiteboard-view{padding:8px;gap:7px}.whiteboard-toolbar{gap:5px;padding:5px;border-radius:15px}.icon-btn{width:34px;height:34px;border-radius:12px}.tool-field{height:34px;padding:4px 7px}.tool-field span{display:none}.tool-field input[type=range]{width:70px}.board-wrap{border-radius:16px}.camera-float{position:fixed;top:max(66px,calc(env(safe-area-inset-top,0px) + 66px));right:max(12px,calc(env(safe-area-inset-right,0px) + 12px));z-index:var(--z-float);display:block;width:min(118px,calc(100vw - 24px))}.camera-tile{width:100%;margin:0}.camera-frame{height:78px;border-radius:17px}.teacher-avatar b{width:30px;height:30px;font-size:15px}.teacher-avatar span{display:none}.teacher-name{right:6px;bottom:6px;max-width:calc(100% - 56px);padding:4px 6px;font-size:10px}.camera-status{top:6px;right:6px;width:15px;height:15px;border-width:2px}.camera-controls{left:6px;bottom:6px;gap:4px}.tile-control{width:25px;height:25px;font-size:10px}.restore-camera{top:max(72px,calc(env(safe-area-inset-top,0px) + 72px));right:max(14px,calc(env(safe-area-inset-right,0px) + 14px));bottom:auto;width:44px;height:44px}.bottom-toolbar{min-height:62px;padding:6px 38px 6px 8px;border-radius:20px}.round-control{width:42px;height:42px;border-radius:15px}.round-control span{font-size:17px}.toolbar-controls{gap:5px}.toolbar-hide{right:8px;width:28px;height:28px}.show-toolbar{bottom:calc(70px + env(safe-area-inset-bottom,0px))}.more-menu{bottom:calc(100% + 6px);width:min(210px,calc(100vw - 26px))}.mobile-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;min-height:58px;padding:5px;border:1px solid var(--line);border-radius:18px;background:#0f172af0;box-shadow:var(--shadow);overflow:hidden}.mobile-tab{display:grid;place-items:center;gap:2px;min-width:0;min-height:46px;border-radius:13px;color:#94a3b8;background:transparent;font-size:10px}.mobile-tab span{font-size:15px;line-height:1}.mobile-tab b{overflow:hidden;max-width:100%;text-overflow:ellipsis;white-space:nowrap;font-size:10px}.mobile-tab.active{color:#fff;background:#2563eb7a}.filter-row{gap:4px;padding:2px}.filter{min-height:30px;padding-inline:6px;font-size:10.5px}.student-row{grid-template-columns:34px minmax(0,1fr) 9px auto;padding:8px}.avatar{width:34px;height:34px;border-radius:12px}.message{max-width:86%}.toast{top:66px;font-size:12px}}@media(max-width:480px){.app-shell{padding:6px}.classroom{grid-template-rows:52px minmax(0,1fr) 58px 54px;gap:6px}.classroom.toolbar-hidden{grid-template-rows:52px minmax(0,1fr) 0 54px}.header-status .chip:nth-child(3){display:none}.recording-indicator{max-width:96px;overflow:hidden;text-overflow:ellipsis}.stage-top>div{display:none}.mode-switch{width:100%;justify-content:center}.mode-switch .pill{min-width:36px;padding-inline:8px}.camera-float{top:max(60px,calc(env(safe-area-inset-top,0px) + 60px));right:max(10px,calc(env(safe-area-inset-right,0px) + 10px));width:min(104px,calc(100vw - 20px))}.camera-frame{height:68px}.tile-control{width:24px;height:24px}.restore-camera{top:max(64px,calc(env(safe-area-inset-top,0px) + 64px));right:max(10px,calc(env(safe-area-inset-right,0px) + 10px));bottom:auto;width:42px;height:42px}.round-control{width:38px;height:38px}.toolbar-controls{gap:4px}.bottom-toolbar{padding-left:4px}.show-toolbar{bottom:calc(64px + env(safe-area-inset-bottom,0px))}.whiteboard-toolbar{overflow-x:auto}.tool-field input[type=range]{width:56px}.panel-title strong{font-size:13px}.panel-section{gap:8px}.student-icons{gap:3px}.media-state{width:22px;height:22px;font-size:12px}.row-more{width:30px;height:30px}.search,.chat-input input{min-height:38px}}@media(max-width:370px){.round-control{width:36px;height:36px;border-radius:13px}.toolbar-controls{gap:3px}.mobile-tab b{font-size:9px}.chip{padding-inline:6px}.filter{font-size:10px;padding-inline:4px}}:root{--bg: #111828;--panel: #111828;--panel-strong: #162033;--panel-soft: #1c2538;--line: rgba(255, 255, 255, .08);--muted: #8d97aa;--text: #f8fafc;--primary: #718B66;--primary-strong: #718B66;--danger: #FF5352;--success: #718B66;--shadow: 0 24px 70px rgba(0, 0, 0, .28)}body{background:var(--bg)}.icon-sprite{position:absolute;width:0;height:0;overflow:hidden}.ui-icon{width:1.25em;height:1.25em;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;fill:none;vertical-align:middle}.chip .ui-icon,.pill .ui-icon,.tab .ui-icon,.mobile-tab .ui-icon{width:16px;height:16px}.app-shell{padding:0;background:#0d1423}.classroom{grid-template-rows:58px minmax(0,1fr) 76px;gap:0;background:var(--bg)}.classroom.toolbar-hidden{grid-template-rows:58px minmax(0,1fr) 0}.class-header,.stage-card,.side-panel,.bottom-toolbar,.webcam-rail{border-color:var(--line);background:var(--panel);box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none}.class-header{border-width:0 0 1px;border-radius:0;padding:10px 16px}.brand{flex-direction:row-reverse}.brand-mark{width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff}.brand small{color:#e2e8f07a}h1{font-size:15px}.chip{min-height:30px;border-color:#ffffff0f;background:#182134;color:#e2e8f0bd}.chip.stable{color:#a9b99f;background:transparent;border-color:transparent}.recording-indicator{min-height:30px;border-color:#ff535266;background:#ff5352;box-shadow:0 12px 28px #ff53522e}.class-main{display:grid;grid-template-columns:248px minmax(360px,1fr) 320px;grid-template-areas:"cams stage side";gap:0;border-bottom:1px solid var(--line)}.webcam-rail{grid-area:cams;display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-height:0;padding:12px 10px;border-width:0 1px 0 0;overflow:hidden}.stage-card{grid-area:stage;border-width:0 1px;border-radius:0;background:#111828}.side-panel{grid-area:side;border-width:0 0 0 1px;border-radius:0}.side-collapsed{grid-template-columns:248px minmax(360px,1fr) 0}.side-collapsed .stage-card{border-left-width:0}.side-collapsed .panel-restore{display:grid;left:16px;top:12px;background:var(--primary)}.side-collapsed .panel-restore .ui-icon{transform:rotate(180deg)}.webcam-head,.side-head{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#fff}.webcam-head{margin-bottom:10px}.webcam-head small,.side-head small{color:var(--muted);font-size:11px}.webcam-list{min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-left:2px;scrollbar-width:thin}.camera-tile{width:100%;margin:0}.camera-frame{height:130px;border-color:#ffffff1a;border-radius:16px;background:linear-gradient(145deg,#718b661f,#111828f0),#111828;box-shadow:inset 0 0 0 1px #ffffff08}.camera-tile:first-child .camera-frame{border-color:#718b66db;box-shadow:0 0 0 1px #718b6657,inset 0 0 34px #718b6614}.student-camera .camera-frame{height:116px;background:linear-gradient(145deg,color-mix(in srgb,var(--tile-accent, #718B66) 18%,#111828),#111828)}.teacher-avatar b{background:color-mix(in srgb,var(--tile-accent, #718B66) 64%,#111828);border:1px solid rgba(255,255,255,.12)}.teacher-name{right:auto;left:10px;bottom:8px;background:transparent;padding:0;font-weight:800}.camera-status{right:auto;left:10px;top:10px;width:9px;height:9px;border:0;background:#6b7280;box-shadow:0 0 0 3px #718b6633}.camera-status.on{background:var(--primary)}.camera-controls{right:9px;left:auto;bottom:8px}.tile-control{width:28px;height:28px;border-color:#ffffff0f;background:#111828c7;color:#e2e8f0b3}.tile-control.active{color:#fff;border-color:#718b668c;background:#718b6652}.hand-badge{position:absolute;z-index:2;right:10px;top:10px;display:grid;place-items:center;width:26px;height:26px;color:#fff;border-radius:50%;background:#ff5352e0}.webcam-rail--collapsed{grid-template-rows:auto auto;align-content:start}.stage-top{min-height:48px;padding:0 18px;border-bottom-color:var(--line);background:#111828}.stage-top>div:first-child{display:none}.mode-switch{width:100%;justify-content:center}.pill,.tab,.filter{border-color:#ffffff0f;background:transparent;color:#e2e8f09e}.pill.active,.tab.active,.filter.active{border-color:#718b6661;background:#718b66b8;color:#fff}.whiteboard-view{padding:0;gap:0}.whiteboard-toolbar{min-height:48px;order:-1;border-width:0 0 1px;border-radius:0;background:#111828;padding:6px 14px;justify-content:center}.tool-field{border-color:#ffffff14;background:#ffffff08}.icon-btn,.round-control,.mini-menu,.row-more,.toolbar-hide,.show-toolbar,.restore-camera,.tile-control{border-color:#ffffff12;background:#ffffff0d;color:#e2e8f0c2}.icon-btn.active,.round-control.active,.mini-menu.active{background:var(--primary);border-color:#ffffff1f;color:#fff}.icon-btn.danger,.round-control.end{background:var(--danger);color:#fff}.board-wrap{border:0;border-radius:0;background-color:#fbfaf7;background-image:radial-gradient(circle,rgba(17,24,40,.2) 1px,transparent 1.1px);background-size:34px 34px;box-shadow:none}#whiteboard{background:transparent}.presentation-view,.screen-view{height:100%;border-radius:0;background:#fbfaf7}.panel-tabs.desktop{padding:4px 10px 12px}.tab{min-height:44px;border-radius:15px}.side-body{padding-top:4px}.panel-section{padding:0 12px 14px}.student-row,.file-row{border-color:#ffffff12;background:#ffffff09}.search,.chat-input input{border-color:#ffffff14;background:#ffffff0b;color:#fff}.filter-row{border-color:#ffffff12;background:#ffffff08}.message.mine{background:#718b66c7}.file-row.active{border-color:#718b668c;background:#718b6638}.bottom-toolbar{position:relative;display:flex;align-items:center;justify-content:center;border-width:0;border-radius:0;padding:8px 62px;min-height:76px}.toolbar-controls{justify-content:center;gap:14px}.round-control{width:52px;height:52px;border-radius:50%;background:#202a3d}.round-control span{display:grid;place-items:center;font-size:20px}.round-control small{position:absolute;top:calc(100% + 2px);color:#e2e8f07a;font-size:10px;white-space:nowrap}.round-control.end{position:absolute;right:16px;background:var(--danger);border-radius:18px;width:auto;padding-inline:15px;gap:7px}.round-control.end small{position:static;color:#fff;font-size:12px}.toolbar-hide{position:absolute;left:16px;right:auto;top:50%;transform:translateY(-50%)}.show-toolbar{bottom:14px;left:50%;right:auto;transform:translate(-50%);background:var(--primary)}.more-menu{border-color:#ffffff14;background:#182134}.restore-camera{top:76px;left:14px;right:auto;background:var(--primary)}.mobile-nav{display:none}@media(max-width:1100px){.class-main{grid-template-columns:218px minmax(300px,1fr) 286px}.side-collapsed{grid-template-columns:218px minmax(300px,1fr) 0}}@media(max-width:768px){html,body,#app{overflow:hidden}.classroom{grid-template-rows:58px minmax(0,1fr) 72px 58px;gap:0}.classroom.toolbar-hidden{grid-template-rows:58px minmax(0,1fr) 0 58px}.class-header{padding:8px 12px}.brand{gap:8px}.brand small{display:block;font-size:9px}.brand-mark{width:34px;height:34px}h1{font-size:12px}.header-status .chip.optional,.header-status .chip.stable{display:none}.chip{min-height:28px;padding:4px 7px;font-size:10px}.class-main,.side-collapsed{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:112px minmax(0,1fr);grid-template-areas:"cams" "stage";min-height:0;overflow:hidden}.webcam-rail{border-width:0 0 1px;padding:8px 10px;display:block;overflow:hidden}.webcam-head{display:none}.webcam-list{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(118px,30vw);gap:8px;overflow-x:auto;overflow-y:hidden;height:100%;padding:0 0 6px;scroll-snap-type:x mandatory}.camera-tile{scroll-snap-align:start}.camera-frame,.student-camera .camera-frame{height:92px;border-radius:13px}.teacher-avatar b{width:34px;height:34px;font-size:14px}.teacher-avatar span{display:none}.teacher-name{max-width:calc(100% - 16px);font-size:10px}.camera-controls{display:none}.hand-badge{width:22px;height:22px}.stage-card{height:auto;border-width:0;min-height:0;grid-template-rows:auto minmax(0,1fr)}.stage-top{display:none}.whiteboard-toolbar{min-height:44px;padding:5px 10px;justify-content:start;border-top:1px solid var(--line)}.whiteboard-toolbar .tool-field.wide{display:none}.board-wrap{min-height:0}.side-panel,.panel-restore{display:none}.stage-content>.panel-section{padding:12px;background:var(--panel)}.bottom-toolbar{min-height:72px;padding:8px 10px;border-top:1px solid var(--line)}.toolbar-controls{width:100%;justify-content:space-around;gap:6px}.round-control,.round-control.end{position:relative;right:auto;width:48px;height:48px;padding:0;border-radius:50%}.round-control.end{background:#202a3d}.round-control.end small{position:absolute;top:calc(100% + 2px);color:#e2e8f07a;font-size:10px}.toolbar-hide{display:none}.mobile-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:3px;min-height:58px;padding:4px 5px;border:0;border-top:1px solid var(--line);border-radius:0;background:#111828;box-shadow:none;overflow:hidden}.mobile-tab{min-height:48px;border-radius:14px;color:#e2e8f08c;background:transparent}.mobile-tab.active{background:#718b66bf;color:#fff}.more-menu{left:10px;right:auto;bottom:calc(100% + 8px)}.show-toolbar{bottom:62px}.restore-camera{top:68px;left:12px;right:auto}.webcam-rail--collapsed{display:grid;place-items:center}.webcam-rail--collapsed .webcam-head{display:flex;margin:0}}@media(max-width:480px){.classroom{grid-template-rows:54px minmax(0,1fr) 70px 56px}.classroom.toolbar-hidden{grid-template-rows:54px minmax(0,1fr) 0 56px}.class-main,.side-collapsed{grid-template-rows:108px minmax(0,1fr)}.header-status .chip:nth-child(3){display:none}.recording-indicator{max-width:96px;overflow:hidden;text-overflow:ellipsis}.webcam-list{grid-auto-columns:126px}.camera-frame,.student-camera .camera-frame{height:88px}.icon-btn{width:34px;height:34px}.round-control,.round-control.end{width:46px;height:46px}.round-control small,.mobile-tab b{font-size:9px}}html,body,#app{max-width:100%;overflow:hidden}.classroom{isolation:isolate}.classroom:fullscreen{width:100vw;height:100vh;padding:12px;background:radial-gradient(circle at top right,rgba(37,99,235,.22),transparent 34%),var(--bg)}.class-main{min-width:0}.class-main.cams-collapsed{grid-template-columns:0 minmax(360px,1fr) 320px}.class-main.cams-collapsed .webcam-rail{display:none}.class-main.side-collapsed.cams-collapsed{grid-template-columns:0 minmax(360px,1fr) 0}.minimized-dock{position:fixed;top:max(74px,calc(env(safe-area-inset-top,0px) + 74px));left:max(14px,calc(env(safe-area-inset-left,0px) + 14px));z-index:calc(var(--z-float) + 10);display:flex;gap:8px;max-width:calc(100vw - 28px);padding:7px;border:1px solid rgba(255,255,255,.1);border-radius:18px;background:#111828eb;box-shadow:0 18px 42px #00000057;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.dock-btn{display:grid;place-items:center;width:42px;height:42px;border:1px solid rgba(113,139,102,.42);border-radius:14px;color:#fff;background:#718b6647;transition:transform .16s ease,background .16s ease,border-color .16s ease}.dock-btn:hover{transform:translateY(-1px);border-color:#718b66d1;background:#718b667a}.restore-camera,.panel-restore{display:none!important}.webcam-head small{display:none}.webcam-list{padding-inline-end:2px}.student-camera .teacher-avatar span{font-size:10px;opacity:.78}.student-camera .tile-control{color:#94a3b8}.student-camera .tile-control.active{color:#fff}.whiteboard-view{min-width:0}.whiteboard-toolbar{align-items:center;gap:8px;overflow-x:auto;overflow-y:visible;overscroll-behavior-x:contain;scrollbar-width:thin}.tool-group{display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;padding-inline-end:8px;border-inline-end:1px solid rgba(255,255,255,.08)}.tool-group:last-child{border-inline-end:0;padding-inline-end:0}.tool-field.color-only{width:38px;padding:0;justify-content:center}.tool-field.color-only input[type=color]{width:28px;height:28px}.drawing-toggle.inactive{color:#e2e8f0;border-color:#94a3b857;background:#94a3b829}.drawing-toggle.inactive:after{content:"";position:absolute;width:22px;height:2px;border-radius:999px;background:currentColor;transform:rotate(-38deg)}.icon-btn:disabled{cursor:not-allowed;opacity:.42;transform:none}.zoom-chip{display:inline-flex;align-items:center;justify-content:center;min-width:48px;height:34px;padding:0 9px;border:1px solid rgba(255,255,255,.08);border-radius:999px;color:#e5edf8;background:#ffffff0e;font-size:12px;font-weight:900}.board-wrap{overflow:auto;background:#d8dee8;overscroll-behavior:contain;padding:18px 0;border-color:#ffffff14}.a4-stack{display:flex;flex-direction:column;align-items:center;gap:18px;width:max-content;min-width:100%;margin:0 auto;padding-bottom:24px}.a4-page{position:relative;overflow:hidden;border:1px solid rgba(15,23,42,.16);border-radius:8px;background:#fff;box-shadow:0 18px 44px #0f172a29}.whiteboard-page-canvas{display:block;background:#fff;cursor:crosshair;touch-action:none;user-select:none;-webkit-user-select:none}.board-wrap.drawing-disabled .whiteboard-page-canvas{cursor:grab}.board-wrap.drawing-disabled .whiteboard-page-canvas:active{cursor:grabbing}.page-number{position:absolute;right:12px;bottom:10px;padding:4px 8px;border-radius:999px;color:#0f172a73;background:#f1f5f9e0;font-size:11px;pointer-events:none}.chat-panel{display:flex;flex-direction:column;height:100%;min-height:0;overflow:hidden}.chat-panel .messages{flex:1 1 auto;min-height:0;overflow-y:auto;padding-bottom:6px}.chat-input{flex:0 0 auto;margin-top:auto;z-index:2;background:var(--panel);padding:8px 0 0}.context-menu .danger-item{color:#fecaca}.context-menu .danger-item:hover,.context-menu .danger-item:focus-visible{background:#ff535226}.file-row.whiteboard-download{border-color:#718b666b;background:#718b6624}.round-control.end{display:inline-grid;grid-template-columns:auto auto;place-items:center;justify-content:center;align-content:center;min-width:52px;color:#fff;background:#ff5352e0;border-color:#ffffff24}.round-control.end .ui-icon{width:20px;height:20px}.round-control.end:hover{background:#ff5352;border-color:#ffffff3d}@media(max-width:1100px){.class-main.cams-collapsed{grid-template-columns:0 minmax(300px,1fr) 286px}.class-main.side-collapsed.cams-collapsed{grid-template-columns:0 minmax(300px,1fr) 0}}@media(max-width:768px){.class-main,.side-collapsed,.class-main.cams-collapsed,.class-main.side-collapsed.cams-collapsed{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:112px minmax(0,1fr);grid-template-areas:"cams" "stage";min-width:0}.class-main.cams-collapsed,.class-main.side-collapsed.cams-collapsed{grid-template-rows:minmax(0,1fr);grid-template-areas:"stage"}.class-main.cams-collapsed .stage-card{grid-area:stage}.minimized-dock{top:auto;left:50%;bottom:max(136px,calc(env(safe-area-inset-bottom,0px) + 136px));transform:translate(-50%);padding:6px;border-radius:16px}.dock-btn{width:40px;height:40px;border-radius:13px}.webcam-rail{grid-area:cams;min-width:0}.webcam-list{max-width:100%}.whiteboard-toolbar{min-height:44px;padding:5px 8px;border-radius:15px}.tool-group{gap:5px;padding-inline-end:6px}.shape-group,.tool-field.wide{display:inline-flex}.tool-field input[type=range]{width:58px}.zoom-chip{min-width:42px;height:32px;font-size:11px}.board-wrap{padding:12px 0;border-radius:14px}.a4-stack{gap:12px}.stage-content>.chat-panel,.stage-content>.file-panel,.stage-content>.student-panel,.stage-content>.assistant-panel{height:100%;min-height:0}.chat-input{padding-bottom:max(4px,env(safe-area-inset-bottom,0px))}.round-control.end{grid-template-columns:1fr;width:48px;min-width:48px;height:48px;padding:0;border-radius:50%;background:#ff5352e0}.round-control.end small{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}}@media(max-width:480px){.class-main,.side-collapsed,.class-main.cams-collapsed,.class-main.side-collapsed.cams-collapsed{grid-template-rows:104px minmax(0,1fr)}.class-main.cams-collapsed,.class-main.side-collapsed.cams-collapsed{grid-template-rows:minmax(0,1fr)}.minimized-dock{bottom:max(130px,calc(env(safe-area-inset-bottom,0px) + 130px));max-width:calc(100vw - 18px)}.dock-btn{width:40px;height:40px}.whiteboard-view{padding:6px}.whiteboard-toolbar{gap:5px}.tool-group{gap:4px}.tool-field.wide{width:82px}.tool-field input[type=range]{width:50px}.zoom-chip{min-width:38px;padding-inline:6px}.context-menu{max-width:calc(100vw - 12px)}}@media(max-width:370px){.minimized-dock{bottom:max(124px,calc(env(safe-area-inset-bottom,0px) + 124px))}.tool-field.wide{display:none}.zoom-chip{font-size:10px}}.class-ended-screen{position:relative;display:grid;place-items:center;width:100%;min-height:100%;padding:clamp(18px,4vw,48px);overflow:hidden;direction:rtl;color:#f8fafc;text-align:center;background:radial-gradient(circle at 18% 18%,rgba(56,189,248,.28),transparent 30%),radial-gradient(circle at 82% 12%,rgba(113,139,102,.28),transparent 28%),linear-gradient(135deg,#07111f,#0f172a 46%,#172036)}.class-ended-screen:before,.class-ended-screen:after{position:absolute;width:min(52vw,520px);aspect-ratio:1;border-radius:999px;filter:blur(8px);content:"";opacity:.42}.class-ended-screen:before{top:-18%;right:-10%;background:#2563eb57}.class-ended-screen:after{left:-12%;bottom:-22%;background:#fb718538}.class-ended-card{position:relative;z-index:1;display:grid;justify-items:center;width:min(100%,620px);padding:clamp(28px,6vw,58px);border:1px solid rgba(255,255,255,.18);border-radius:clamp(28px,5vw,44px);background:linear-gradient(145deg,#0f172ac7,#1e293b94);box-shadow:0 28px 90px #0208177a,inset 0 1px #ffffff29;-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);animation:endedCardIn .48s ease both}.class-ended-badge{display:grid;place-items:center;width:clamp(70px,15vw,96px);height:clamp(70px,15vw,96px);margin-bottom:18px;border:1px solid rgba(125,211,252,.42);border-radius:30px;color:#e0f2fe;background:linear-gradient(135deg,#38bdf847,#22c55e38);box-shadow:0 18px 52px #0ea5e938}.class-ended-badge .ui-icon{width:38px;height:38px}.class-ended-eyebrow{margin-bottom:10px;color:#7dd3fc;font-size:clamp(12px,2.4vw,14px);font-weight:900;letter-spacing:.02em}.class-ended-card h1{font-size:clamp(34px,8vw,62px);line-height:1.15;white-space:normal}.class-ended-subtitle{max-width:34rem;margin-top:14px;color:#cbd5e1;font-size:clamp(15px,3vw,19px);line-height:1.9}.class-ended-meta{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;width:min(100%,360px);margin:28px 0}.class-ended-meta span{display:grid;gap:4px;min-width:0;padding:14px;border:1px solid rgba(148,163,184,.2);border-radius:20px;background:#0f172a85}.class-ended-meta b{color:#fff;font-size:18px}.class-ended-meta small{color:#94a3b8;font-size:11px;font-weight:800}.class-ended-action{min-height:52px;padding:0 26px;border:1px solid rgba(255,255,255,.2);border-radius:999px;color:#082f49;background:linear-gradient(135deg,#e0f2fe,#7dd3fc);box-shadow:0 16px 42px #0ea5e947;font-size:14px;font-weight:950;transition:transform .16s ease,box-shadow .16s ease}.class-ended-action:hover,.class-ended-action:focus-visible{outline:3px solid rgba(125,211,252,.3);outline-offset:4px;transform:translateY(-2px);box-shadow:0 20px 52px #0ea5e95c}.end-class-card p{margin-top:8px;color:#cbd5e1;line-height:1.8}@keyframes endedCardIn{0%{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:520px){.class-ended-screen{padding:14px}.class-ended-card{border-radius:28px}.class-ended-meta{grid-template-columns:1fr;margin:22px 0}.class-ended-action{width:100%}}.header-status{flex-wrap:nowrap}.minimized-dock{position:static;display:inline-flex;align-items:center;gap:6px;max-width:min(320px,36vw);padding:0;border:0;border-radius:0;background:transparent;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;transform:none}.dock-btn{display:inline-grid;place-items:center;width:38px;min-width:38px;height:38px;min-height:38px;padding:0;border:1px solid rgba(56,189,248,.35);border-radius:14px;color:#e0f2fe;background:linear-gradient(135deg,#2563eb57,#0ea5e92e);box-shadow:inset 0 1px #ffffff14,0 8px 18px #0206172e;line-height:1;transition:transform .16s ease,background .16s ease,border-color .16s ease,color .16s ease,box-shadow .16s ease}.dock-btn:hover,.dock-btn:focus-visible{outline:0;color:#fff;border-color:#7dd3fcc7;background:linear-gradient(135deg,#2563eb94,#0ea5e957);box-shadow:inset 0 1px #ffffff1f,0 10px 22px #0ea5e92e;transform:translateY(-1px)}.dock-btn:active{transform:translateY(0) scale(.97)}.dock-btn .ui-icon{width:18px;height:18px}.icon-btn:disabled,.header-icon-btn:disabled{cursor:not-allowed;opacity:.46;transform:none}.icon-btn[data-board=zoom-in]:disabled{color:#e2e8f061;border-color:#94a3b81f;background:#94a3b814}@media(max-width:768px){.header-status{margin-right:auto;gap:5px}.minimized-dock{max-width:112px;gap:5px}.dock-btn{width:34px;min-width:34px;height:34px;min-height:34px;padding:0;border-radius:13px}.dock-btn .ui-icon{width:17px;height:17px}}@media(max-width:480px){.header-status{gap:4px}.minimized-dock{max-width:76px}}.presentation-view{display:grid;grid-template-rows:auto auto minmax(0,1fr);align-items:stretch;justify-items:stretch;gap:10px;height:100%;min-height:0;padding:12px;direction:rtl;color:#e5e7eb;overflow:hidden}.presentation-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0;padding:10px;border:1px solid rgba(148,163,184,.22);border-radius:18px;background:#0f172ab8;box-shadow:0 10px 28px #0f172a29}.presentation-title{min-width:0}.presentation-title strong{display:block;color:#fff;font-size:14px}.presentation-title small{display:block;max-width:min(44vw,520px);overflow:hidden;color:#cbd5e1;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.presentation-actions{display:flex;align-items:center;gap:7px;min-width:0}.presentation-upload-btn{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:0 13px;border:1px solid rgba(125,211,252,.32);border-radius:999px;color:#ecfeff;background:linear-gradient(135deg,#0ea5e9e6,#2563ebdb);font:inherit;font-size:12px;font-weight:900;cursor:pointer}.presentation-upload-btn .ui-icon{width:18px;height:18px}.presentation-error{margin:0;padding:10px 12px;border:1px solid rgba(248,113,113,.42);border-radius:14px;color:#fecaca;background:#7f1d1d6b;font-size:13px;font-weight:800}.presentation-stage{min-height:0;overflow:hidden;border:1px solid rgba(148,163,184,.24);border-radius:22px;background:radial-gradient(circle at 20% 0%,rgba(14,165,233,.12),transparent 30%),#0f172a}.presentation-stage .presentation-empty{display:grid;place-content:center;height:100%;margin:0 auto}.document-scroll{width:100%;height:100%;overflow:auto;overscroll-behavior:contain;padding:18px;background:#dbe3ee}.document-canvas{width:calc(100% * var(--presentation-scale, 1));min-width:min(100%,calc(820px * var(--presentation-scale, 1)));height:calc(100% * var(--presentation-scale, 1));min-height:calc(680px * var(--presentation-scale, 1));margin:0 auto;transform-origin:top center}.document-frame{display:block;width:100%;height:100%;min-height:inherit;border:0;border-radius:14px;background:#fff;box-shadow:0 18px 42px #0f172a38}.document-frame iframe,.document-frame object{width:100%;height:100%;border:0}.presentation-fallback,.powerpoint-preview-card{color:#0f172a;background:#fff}.powerpoint-canvas{display:grid;align-items:start;min-height:calc(720px * var(--presentation-scale, 1))}.powerpoint-preview-card{display:grid;gap:12px;width:min(960px,100%);min-height:inherit;margin:0 auto;padding:clamp(18px,4vw,34px);border-radius:18px;box-shadow:0 18px 42px #0f172a38}.powerpoint-badge{display:inline-grid;place-items:center;width:58px;height:58px;border-radius:18px;color:#fff;background:linear-gradient(135deg,#f97316,#b91c1c);font-weight:1000}.powerpoint-preview-card h3{margin:0;font-size:clamp(18px,3vw,26px)}.powerpoint-preview-card p{margin:0;color:#475569;line-height:1.9}.powerpoint-meta{display:flex;flex-wrap:wrap;gap:8px}.powerpoint-meta span{padding:6px 10px;border-radius:999px;color:#334155;background:#f1f5f9;font-size:12px;font-weight:900}.ppt-frame{min-height:320px;border:1px dashed #cbd5e1;box-shadow:none}.media-presentation{display:grid;place-items:center;height:100%;min-height:0;padding:clamp(14px,3vw,28px)}.video-presentation video{width:min(100%,1100px);max-height:100%;border-radius:18px;background:#020617;box-shadow:0 20px 50px #00000047}.video-presentation p{margin:12px 0 0;color:#dbeafe;font-size:13px}.audio-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;width:min(620px,100%);padding:clamp(18px,4vw,30px);border:1px solid rgba(125,211,252,.24);border-radius:24px;background:linear-gradient(135deg,#0f172ae0,#1e293bdb);box-shadow:0 20px 46px #0000003d}.audio-icon{display:grid;place-items:center;width:64px;height:64px;border-radius:22px;color:#0f172a;background:#bae6fd;font-size:32px;font-weight:1000}.audio-card strong,.audio-card small{display:block;min-width:0;overflow-wrap:anywhere}.audio-card small{margin-top:5px;color:#bfdbfe}.audio-card audio{grid-column:1 / -1;width:100%}@media(max-width:768px){.presentation-view{padding:8px;gap:8px}.presentation-toolbar{align-items:stretch;flex-direction:column;border-radius:15px}.presentation-title small{max-width:100%}.presentation-actions{flex-wrap:wrap}.presentation-upload-btn{flex:1 1 180px;justify-content:center}.document-scroll{padding:10px}.document-canvas{min-width:calc(100% * var(--presentation-scale, 1));min-height:calc(560px * var(--presentation-scale, 1))}.presentation-stage{border-radius:16px}.audio-card{grid-template-columns:1fr;text-align:center}.audio-icon{margin:0 auto}}@media(max-width:420px){.presentation-actions .icon-btn{width:34px;height:34px}.presentation-zoom-chip{min-width:40px}.presentation-upload-btn span{display:inline}}.role-badge{display:inline-flex;align-items:center;width:max-content;margin-top:3px;padding:2px 8px;border:1px solid rgba(56,189,248,.28);border-radius:999px;color:#dff6ff;background:#38bdf81f;font-size:10px;font-weight:900}.whiteboard-toolbar.view-only{justify-content:space-between}.view-only-note{flex:0 0 auto;padding:7px 10px;border:1px solid rgba(56,189,248,.18);border-radius:999px;color:#cfe8ff;background:#38bdf814;font-size:12px;font-weight:800;white-space:nowrap}.file-row-wrapper{display:grid;grid-template-columns:minmax(0,1fr) 38px;align-items:stretch;gap:7px}.file-download{width:38px;height:auto;min-height:42px;border-radius:14px}.dot.online{background:var(--success);box-shadow:0 0 0 4px #22c55e1f}.message.student-message.mine{background:#38bdf8b8}@media(max-width:480px){.role-badge{display:none}.view-only-note{max-width:54vw;overflow:hidden;text-overflow:ellipsis}}.entry-waiting-screen{position:relative;display:grid;place-items:center;width:100%;min-height:100%;padding:clamp(10px,2.5vw,24px);overflow:hidden;direction:rtl;color:#f8fafc;text-align:center;background:radial-gradient(circle at 50% 30%,rgba(37,99,235,.18),transparent 26%),radial-gradient(circle at 18% 16%,rgba(56,189,248,.12),transparent 32%),radial-gradient(circle at 82% 72%,rgba(37,99,235,.12),transparent 30%),linear-gradient(135deg,#050913,#09111f 48%,#030711);isolation:isolate}.entry-waiting-screen:before,.entry-waiting-screen:after{position:absolute;width:min(48vw,560px);aspect-ratio:1;border-radius:999px;filter:blur(18px);content:"";opacity:.42;z-index:-1}.entry-waiting-screen:before{top:-22%;right:18%;background:#2563eb33}.entry-waiting-screen:after{left:8%;bottom:-24%;background:#0ea5e929}.entry-waiting-screen.is-leaving{animation:entryFadeOut .42s ease forwards}.entry-waiting-card{position:relative;display:grid;justify-items:center;align-content:start;width:min(100%,1626px);min-height:min(895px,calc(100vh - 48px));padding:clamp(32px,5.3vh,46px) clamp(18px,4vw,48px) clamp(28px,5vh,56px);border:1px solid rgba(148,163,184,.2);border-radius:clamp(24px,2vw,32px);background:radial-gradient(circle at 50% 44%,rgba(59,130,246,.13),transparent 27%),linear-gradient(145deg,#0f172ab8,#090f1bd1);box-shadow:0 30px 90px #0000006b,inset 0 1px #ffffff0f;-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);animation:entryCardIn .5s ease both}.entry-waiting-icon{display:grid;place-items:center;width:70px;height:58px;margin-bottom:18px;color:#3b82f6;filter:drop-shadow(0 0 14px rgba(59,130,246,.48))}.entry-waiting-role-icon{width:62px;height:62px;fill:none;stroke:currentColor;stroke-width:3.6;stroke-linecap:round;stroke-linejoin:round}.entry-waiting-card h1{color:#f8fafc;font-size:clamp(31px,3.1vw,43px);font-weight:950;line-height:1.25;letter-spacing:-.03em;white-space:normal;text-shadow:0 12px 34px rgba(0,0,0,.28)}.entry-waiting-subtitle{margin-top:16px;color:#aab6c8;font-size:clamp(19px,1.75vw,25px);font-weight:800}.entry-countdown{--progress: 1;position:relative;display:grid;place-items:center;width:clamp(250px,21vw,348px);aspect-ratio:1;margin-top:clamp(32px,4.7vh,43px);border-radius:999px;background:conic-gradient(from 0deg,#3b82f6 calc(var(--progress) * 1turn),#1f2937b8 0);box-shadow:0 0 30px #2563eb3d,0 28px 70px #00000059;transition:background .25s linear}.entry-countdown:before{position:absolute;inset:7px;border-radius:inherit;background:#101827;content:""}.entry-countdown:after{position:absolute;inset:28px;border:1px solid rgba(255,255,255,.03);border-radius:inherit;background:radial-gradient(circle at 50% 22%,rgba(255,255,255,.12),transparent 42%),linear-gradient(145deg,#1e293beb,#0f172af5);box-shadow:inset 0 22px 58px #ffffff0e,inset 0 -26px 58px #00000047;content:""}.entry-countdown-core{position:relative;z-index:1;display:grid;justify-items:center;line-height:1}.entry-countdown-core strong{color:#fff;font-size:clamp(78px,7.6vw,137px);font-weight:900;letter-spacing:-.07em;text-shadow:0 9px 28px rgba(255,255,255,.1),0 18px 38px rgba(0,0,0,.34)}.entry-countdown-core span{margin-top:14px;color:#9aa8ba;font-size:clamp(17px,1.55vw,25px);font-weight:900}.entry-status{display:inline-flex;align-items:center;justify-content:center;gap:16px;width:min(500px,92%);min-height:64px;margin-top:clamp(30px,4vh,36px);padding:13px 24px;border:1px solid rgba(148,163,184,.16);border-radius:18px;color:#d7e0ee;background:linear-gradient(145deg,#1e293ba3,#0f172ab8);box-shadow:inset 0 1px #ffffff0d,0 18px 42px #0000002e;font-size:clamp(15px,1.35vw,20px);font-weight:800}.entry-status span{width:13px;height:13px;border-radius:999px;background:#2f7df6;box-shadow:0 0 18px #2f7df6bd}.entry-profile{display:inline-grid;grid-template-columns:minmax(0,auto) 96px;align-items:center;gap:24px;margin-top:clamp(34px,4.6vh,39px)}.entry-profile-copy{text-align:left}.entry-profile-copy strong{display:block;color:#fff;font-size:clamp(24px,2.05vw,31px);font-weight:950;line-height:1.25}.entry-profile-copy small{display:block;margin-top:8px;color:#94a3b8;font-size:clamp(17px,1.45vw,23px);font-weight:800}.entry-avatar{display:grid;place-items:center;width:96px;height:96px;border:2px solid #2f7df6;border-radius:999px;background:linear-gradient(145deg,#1e293bd1,#0f172af0);box-shadow:0 0 28px #2f7df633,inset 0 1px #ffffff14}.entry-avatar span{position:relative;width:54px;height:54px;color:#cbd5e1}.entry-avatar span:before,.entry-avatar span:after{position:absolute;left:50%;border-radius:999px;background:currentColor;content:"";transform:translate(-50%)}.entry-avatar span:before{top:0;width:29px;height:29px}.entry-avatar span:after{bottom:0;width:54px;height:25px;border-radius:28px 28px 12px 12px}@keyframes entryCardIn{0%{opacity:0;transform:translateY(10px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes entryFadeOut{to{opacity:0;transform:scale(.985)}}@media(max-width:768px){.entry-waiting-card{min-height:calc(100vh - 28px);padding-block:26px 30px}.entry-waiting-icon{margin-bottom:12px}.entry-countdown{margin-top:28px}.entry-status{min-height:56px;gap:11px;padding-inline:16px}.entry-profile{grid-template-columns:minmax(0,auto) 76px;gap:16px;margin-top:28px}.entry-avatar{width:76px;height:76px}.entry-avatar span{transform:scale(.78)}}@media(max-width:420px),(max-height:680px){.entry-waiting-screen{padding:8px}.entry-waiting-card{border-radius:22px}.entry-waiting-icon{width:54px;height:46px;margin-bottom:10px}.entry-waiting-role-icon{width:50px;height:50px}.entry-waiting-subtitle{margin-top:10px}.entry-countdown{width:clamp(210px,62vw,250px);margin-top:22px}.entry-countdown:after{inset:23px}.entry-status{width:min(100%,390px);margin-top:22px;font-size:14px}.entry-profile{margin-top:24px}}.presentation-progress{position:relative;overflow:hidden;min-height:38px;border:1px solid rgba(59,130,246,.28);border-radius:14px;background:#0f172ac2;color:#dbeafe}.presentation-progress span{position:absolute;inset:0 auto 0 0;width:var(--upload-progress, 8%);background:linear-gradient(90deg,#2563eb8c,#0ea5e994);transition:width .25s ease}.presentation-progress b{position:relative;z-index:1;display:block;padding:9px 14px;font-size:13px}.presentation-status,.screen-audio-status{margin:0;padding:9px 12px;border:1px solid rgba(148,163,184,.22);border-radius:13px;color:#cbd5e1;background:#0f172a9e;font-size:13px;font-weight:800}.screen-audio-status.active{border-color:#22c55e59;color:#bbf7d0;background:#16653438}.entry-waiting-screen{min-height:100vh;min-height:100svh;min-height:100dvh;padding:max(clamp(10px,2.5vw,24px),env(safe-area-inset-top,0px)) max(clamp(10px,2.5vw,24px),env(safe-area-inset-right,0px)) max(clamp(10px,2.5vw,24px),env(safe-area-inset-bottom,0px)) max(clamp(10px,2.5vw,24px),env(safe-area-inset-left,0px))}.entry-waiting-card{min-height:min(895px,calc(100dvh - 48px));max-height:calc(100dvh - 20px);overflow:auto;overscroll-behavior:contain}@media(orientation:landscape)and (max-height:520px){.entry-waiting-card{grid-template-columns:1fr auto 1fr;align-items:center;align-content:center;column-gap:18px;min-height:auto;padding:14px 18px}.entry-waiting-icon,.entry-waiting-card h1,.entry-waiting-subtitle{grid-column:1}.entry-countdown{grid-column:2;grid-row:1 / span 4;width:clamp(150px,30vh,190px);margin-top:0}.entry-countdown-core strong{font-size:clamp(52px,14vh,82px)}.entry-status,.entry-profile{grid-column:3;margin-top:10px}}.camera-tile.is-speaking .camera-frame{border-color:#22c55eb8;box-shadow:0 0 0 3px #22c55e29,0 0 34px #22c55e38}.camera-tile.is-speaking .camera-frame:after{content:"";position:absolute;inset:-4px;border:2px solid rgba(34,197,94,.34);border-radius:inherit;animation:speaking-halo 1.6s ease-in-out infinite;pointer-events:none}.speaking-badge{position:absolute;inset-inline-start:10px;top:10px;z-index:2;padding:4px 8px;border-radius:999px;color:#dcfce7;background:#166534d1;border:1px solid rgba(187,247,208,.35);font-size:11px;font-weight:900}.context-menu{position:fixed;left:var(--menu-left);top:var(--menu-top);z-index:1000}@keyframes speaking-halo{0%,to{opacity:.55;transform:scale(1)}50%{opacity:1;transform:scale(1.02)}}@media(max-width:560px){.context-menu{left:12px!important;right:12px;top:auto!important;bottom:max(12px,env(safe-area-inset-bottom));width:auto}}#app:fullscreen{width:100vw;height:100dvh;overflow:hidden;background:radial-gradient(circle at top right,rgba(37,99,235,.22),transparent 34%),var(--bg)}#app:fullscreen .classroom{width:100vw;height:100dvh;min-height:100dvh;padding:max(12px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}#app:fullscreen .bottom-toolbar,#app:fullscreen .minimized-dock,#app:fullscreen .context-menu{z-index:1005}.route-shell{overflow:auto;display:grid;place-items:start center;padding:24px}.route-card{width:min(720px,100%);padding:24px;border:1px solid var(--line);border-radius:28px;background:linear-gradient(145deg,#0f172af0,#0f172ab8);box-shadow:var(--shadow)}.route-card.wide{width:min(1100px,100%)}.login-card{margin-top:8vh}.role-grid,.admin-grid,.class-list,.admin-sections{display:grid;gap:14px;margin-top:20px}.role-grid,.admin-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.role-card,.stat-card,.class-card{border:1px solid var(--line);border-radius:20px;padding:16px;color:var(--text);background:#94a3b81a}.role-card strong,.stat-card strong{display:block;color:#fff;font-size:24px}.role-card span,.stat-card span,.class-card small,.muted-block{color:var(--muted)}.role-card:hover{border-color:#38bdf88c;background:#2563eb52}.primary-link{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:9px 14px;border-radius:999px;color:#fff;background:#2563ebb8;text-decoration:none;font-weight:900;border:1px solid rgba(56,189,248,.48)}.route-nav{display:flex;gap:10px;margin-bottom:16px}.route-nav a{color:#cbd5e1;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:8px 12px}.class-card{display:flex;align-items:center;justify-content:space-between;gap:12px}.admin-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.admin-form label{display:grid;gap:7px;color:#cbd5e1;font-weight:800}.admin-form input,.admin-form select{min-height:42px;border:1px solid var(--line);border-radius:14px;background:#0b1323;color:var(--text);padding:8px 10px}@media(max-width:700px){.class-card{align-items:stretch;flex-direction:column}.route-shell{padding:12px}}.eyebrow{margin:0 0 8px;color:#86efac;font-size:12px;font-weight:950;letter-spacing:.02em}.dashboard-card,.classes-page .route-card{position:relative;overflow:hidden}.dashboard-card:before,.classes-page .route-card:before{position:absolute;inset:-90px auto auto -90px;width:260px;height:260px;border-radius:50%;background:#718b662e;filter:blur(14px);content:"";pointer-events:none}.dashboard-hero{position:relative;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px;border:1px solid rgba(148,163,184,.16);border-radius:24px;background:linear-gradient(135deg,#111c2fb8,#0f172a57)}.dashboard-hero h1{font-size:clamp(22px,3vw,34px);white-space:normal}.admin-glow-badge{display:inline-flex;align-items:center;min-height:42px;padding:10px 14px;border:1px solid rgba(134,239,172,.28);border-radius:999px;color:#dcfce7;background:#22c55e1f;font-weight:900;white-space:nowrap}.admin-grid .stat-card{background:linear-gradient(145deg,#111c2feb,#0b1323b8)}.admin-sections.enhanced{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start}.admin-section{min-width:0;padding:16px;border:1px solid var(--line);border-radius:22px;background:#0206173d}.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.section-title h2{margin:0;color:#fff;font-size:18px}.section-title span{color:#86efac;font-size:12px;font-weight:900}.mini-list,.admin-room-list{display:grid;gap:10px}.mini-list article,.admin-room-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px;border:1px solid rgba(148,163,184,.14);border-radius:16px;background:#94a3b814}.mini-list b,.admin-room-row strong{color:#fff}.mini-list small,.admin-room-row small{display:block;margin-top:4px;color:var(--muted)}.status-pill{display:inline-flex;align-items:center;justify-content:center;min-height:28px;padding:5px 10px;border-radius:999px;border:1px solid rgba(148,163,184,.18);color:#dbeafe;background:#2563eb2e;font-size:12px;font-weight:900;white-space:nowrap}.status-pill.live{color:#dcfce7;background:#22c55e29;border-color:#22c55e4d}.status-pill.ended,.status-pill.cancelled{color:#cbd5e1;background:#64748b2e}.admin-form.compact-form,.room-form{grid-template-columns:repeat(2,minmax(0,1fr))}.student-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:0;padding:12px;border:1px solid var(--line);border-radius:16px;color:#cbd5e1}.student-picker legend{padding:0 8px;color:#fff;font-weight:900}.check-row{display:flex!important;grid-auto-flow:column;align-items:center;gap:8px!important;font-weight:700!important}.check-row input{min-height:auto!important;accent-color:var(--success)}.full-field{grid-column:1 / -1}.rich-list{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.class-card.rich-card{align-items:stretch;flex-direction:column;background:linear-gradient(145deg,#111c2fdb,#0f172aa3)}.class-card-main{display:grid;gap:8px}.class-card-main h2{margin:0;color:#fff;font-size:20px}.class-meta{display:flex;flex-wrap:wrap;gap:8px}.class-meta span{padding:7px 9px;border:1px solid rgba(148,163,184,.14);border-radius:999px;color:#cbd5e1;background:#02061738;font-size:12px}@media(max-width:860px){.admin-sections.enhanced,.admin-form.compact-form,.room-form,.student-picker{grid-template-columns:1fr}.dashboard-hero{align-items:flex-start;flex-direction:column}.full-field{grid-column:auto}}.password-row button,.security-icon{min-width:44px;min-height:44px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center}.security-icon:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #60a5fa;outline-offset:2px}@media(max-width:640px){.admin-sections.enhanced,.admin-grid{grid-template-columns:1fr}.route-card,.dashboard-card{width:100%;overflow-x:hidden}}.ui-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border:1px solid transparent;border-radius:14px;color:#fff;background:#334155b3;font-weight:900;text-decoration:none;transition:transform .16s ease,background .16s ease,border-color .16s ease,opacity .16s ease}.ui-button:hover:not(:disabled){transform:translateY(-1px)}.ui-button:disabled{cursor:not-allowed;opacity:.58;transform:none}.ui-button--primary{border-color:#7dd3fc75;background:linear-gradient(135deg,#2563eb,#0284c7);box-shadow:0 12px 30px #2563eb38}.ui-button--primary:hover:not(:disabled){border-color:#bae6fdb8;background:linear-gradient(135deg,#1d4ed8,#0369a1)}.ui-button--secondary{border-color:var(--line);color:#dbeafe;background:#1e293bb8}.ui-button--danger{border-color:#fb71856b;background:#be185db8}.ui-button--block{width:100%}.text-link{color:#bae6fd;font-weight:850;text-underline-offset:4px}.text-link:hover{color:#fff}.auth-shell{min-height:100%;place-items:center;padding-block:clamp(18px,5vh,52px)}.login-card.auth-card{position:relative;width:min(480px,100%);margin-top:0;overflow:hidden;padding:clamp(22px,4vw,34px);border-radius:30px;background:radial-gradient(circle at 12% 0%,rgba(14,165,233,.18),transparent 35%),linear-gradient(150deg,#0f172afa,#080f1de6)}.auth-card:after{position:absolute;inset:auto -70px -100px auto;width:230px;height:230px;border-radius:50%;background:#2563eb1f;filter:blur(8px);content:"";pointer-events:none}.auth-brand,.auth-card__header,.auth-form,.auth-links,.form-message{position:relative;z-index:1}.auth-brand{align-items:flex-start;margin-bottom:26px}.auth-brand h1,.auth-card__header h1{margin:0;color:#fff;font-size:clamp(23px,4vw,31px);line-height:1.4;white-space:normal}.auth-brand small{display:block;margin-top:6px;color:var(--muted);line-height:1.8}.auth-card__header{display:grid;gap:6px;margin-bottom:24px}.auth-card__header .muted-block{margin:4px 0 0;line-height:1.9}.auth-form{display:grid;gap:16px}.form-field{display:grid;gap:8px;color:#dbeafe;font-size:13px;font-weight:900}.form-field input{width:100%;min-height:48px;border:1px solid rgba(148,163,184,.24);border-radius:15px;color:#f8fafc;background:#02061785;padding:11px 13px;transition:border-color .16s ease,box-shadow .16s ease,background .16s ease}.form-field input::placeholder{color:#64748b}.form-field input:hover{border-color:#7dd3fc5c}.form-field input:focus{border-color:#38bdf8c7;background:#020617b8;box-shadow:0 0 0 4px #0ea5e91f;outline:none}.password-field{position:relative;display:block}.password-field input{padding-inline-end:54px}.password-toggle{position:absolute;top:50%;inset-inline-end:7px;display:inline-grid;place-items:center;width:38px;height:38px;padding:8px;border:1px solid transparent;border-radius:12px;color:#94a3b8;background:transparent;transform:translateY(-50%);transition:color .16s ease,background .16s ease,border-color .16s ease}.password-toggle:hover{color:#fff;border-color:#94a3b82e;background:#94a3b81a}.password-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.remember-me-option{display:inline-flex;align-items:center;justify-content:flex-start;gap:10px;width:fit-content;color:#dbeafe;font-size:13px;font-weight:850;line-height:1.7;cursor:pointer;-webkit-user-select:none;user-select:none}.remember-me-option input{width:18px;height:18px;accent-color:#38bdf8;cursor:pointer}.auth-links{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:22px}.auth-links--stacked{flex-direction:column;gap:10px;text-align:center}.auth-signup-prompt{color:var(--muted);line-height:1.8}.form-message{min-height:24px;margin-top:14px;padding:0 4px;color:var(--muted);font-size:13px;line-height:1.8;text-align:center}.form-message:empty{margin-top:0}.form-message--success{color:#bbf7d0}.form-message--error{color:#fecdd3}@media(max-width:520px){.auth-shell{place-items:start center;padding:12px}.login-card.auth-card{margin-top:max(8px,env(safe-area-inset-top));padding:22px 18px;border-radius:24px}.auth-brand{margin-bottom:22px}.auth-brand .brand-mark{width:40px;height:40px;border-radius:14px}.remember-me-option{width:100%}.auth-links{gap:12px;margin-top:20px}}.field-error{color:#b42318;min-height:1.25rem;font-size:.85rem}.role-options{border:1px solid rgba(15,23,42,.14);border-radius:16px;padding:.9rem;display:grid;gap:.75rem}.role-options legend{padding:0 .4rem;font-weight:700}.role-options label{display:flex;gap:.5rem;align-items:center}.auth-shell--signup{min-height:100dvh;align-items:start;place-items:start center;overflow-x:hidden;padding:max(16px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}.signup-card.auth-card{width:min(560px,calc(100vw - 24px));max-width:560px;margin:0 auto;padding:clamp(18px,4vw,32px);overflow:visible}.signup-card .auth-card__header{margin-bottom:18px}.role-options--cards{border-color:#94a3b83d;background:#02061738}.role-choice{align-items:flex-start!important;gap:10px!important;padding:12px;border:1px solid rgba(148,163,184,.18);border-radius:14px;background:#0f172a6b;cursor:pointer}.role-choice:focus-within{outline:3px solid #60a5fa;outline-offset:2px}.role-choice input{margin-top:4px;accent-color:#38bdf8}.role-choice strong{display:block;color:#fff}.role-choice small{display:block;margin-top:3px;color:var(--muted);line-height:1.6}@media(max-width:520px){.auth-shell--signup{padding-inline:max(12px,env(safe-area-inset-left));padding-block:max(12px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-bottom))}.signup-card.auth-card{width:min(100%,calc(100vw - 24px));border-radius:22px;padding:18px 14px}.signup-card .auth-card__header h1{font-size:clamp(20px,7vw,25px)}.signup-card .auth-form{gap:12px}}.admin-page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin:18px 0 22px;padding:18px;border:1px solid rgba(148,163,184,.16);border-radius:24px;background:linear-gradient(135deg,#0f172ac7,#1e293b7a)}.admin-page-header h2{margin:0;color:#fff;font-size:clamp(20px,3vw,28px)}.admin-page-header p{margin:6px 0 0;color:var(--muted);line-height:1.8}.admin-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border:1px solid transparent;border-radius:14px;font:inherit;font-weight:900;text-decoration:none;cursor:pointer;transition:.16s ease}.admin-btn:disabled{opacity:.55;cursor:not-allowed}.admin-btn:focus-visible,.jalali-trigger:focus-visible{outline:3px solid #60a5fa;outline-offset:2px}.admin-btn--primary{color:#fff;background:linear-gradient(135deg,#2563eb,#0284c7);border-color:#7dd3fc70}.admin-btn--secondary{color:#dbeafe;background:#1e293bb8;border-color:#94a3b838}.admin-btn--danger{color:#ffe4e6;background:#be123cb8;border-color:#fb71856b}.admin-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.admin-card{padding:18px;border:1px solid rgba(148,163,184,.16);border-radius:24px;background:#02061742}.admin-card h3{margin:0 0 16px;color:#fff}.admin-class-form{display:grid;grid-template-columns:1fr;gap:16px}.admin-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.admin-field{display:grid;gap:8px;color:#dbeafe;font-size:13px;font-weight:900}.admin-field input,.admin-field select,.admin-field textarea,.admin-input{width:100%;min-height:48px;padding:11px 13px;border:1px solid rgba(148,163,184,.24);border-radius:15px;color:#f8fafc;background:#02061785;font:inherit}.admin-field textarea{resize:vertical}.field-help{color:#94a3b8;font-weight:600;line-height:1.7}.field-error{color:#fecdd3}.jalali-field{position:relative}.jalali-trigger{display:flex;align-items:center;justify-content:space-between;text-align:right;cursor:pointer}.jalali-pop{position:absolute;z-index:50;inset-inline-start:0;top:calc(100% + 8px);width:min(340px,88vw);padding:14px;border:1px solid rgba(125,211,252,.28);border-radius:20px;background:#0f172a;box-shadow:0 22px 60px #0000006b}.jalali-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.jalali-top button,.jalali-days button{border:1px solid rgba(148,163,184,.18);border-radius:12px;color:#e2e8f0;background:#1e293bcc;min-height:36px}.jalali-week,.jalali-days{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;text-align:center}.jalali-week{color:#93c5fd;font-weight:900;margin-bottom:6px}.jalali-days .selected{color:#fff;background:#2563eb;border-color:#93c5fd}.admin-dialog{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:16px;background:#0206179e}.admin-dialog[hidden]{display:none}.admin-dialog__panel{width:min(560px,100%);padding:22px;border:1px solid rgba(148,163,184,.24);border-radius:24px;background:#0f172a;color:#e2e8f0;box-shadow:0 24px 80px #00000080}.admin-toolbar{align-items:end}.table-wrap{overflow-x:auto}@media(max-width:760px){.admin-page-header,.admin-actions{flex-direction:column;align-items:stretch}.admin-form-grid{grid-template-columns:1fr}.admin-btn{width:100%}.jalali-pop{position:fixed;inset:auto 12px 12px;width:auto}}.verify-email-card{text-align:center;display:grid;gap:14px}.verify-email-card--success h1{color:#047857}.verify-email-card--warning h1{color:#b45309}.verify-email-card--error h1{color:#b91c1c}.account-status-card{margin-top:18px}.account-status-card .actions{margin-top:12px;flex-wrap:wrap}.panel-nav{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px;padding:10px;border:1px solid rgba(148,163,184,.14);border-radius:20px;background:#02061747}.panel-nav__group{display:flex;flex-wrap:wrap;gap:8px}.panel-nav .ui-button{min-height:40px;padding:8px 14px}.dashboard-hero--user{margin-bottom:16px}.dashboard-switcher{position:relative;z-index:1;display:grid;grid-template-columns:minmax(150px,.35fr) minmax(0,1fr);align-items:center;gap:14px;margin-top:16px;padding:14px;border:1px solid rgba(148,163,184,.16);border-radius:22px;background:linear-gradient(145deg,#111c2fd1,#02061747)}.dashboard-switcher__intro{display:grid;gap:4px}.dashboard-switcher__intro strong{color:#fff;font-size:15px}.dashboard-switcher__intro span{color:var(--muted);font-size:12px}.dashboard-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.dashboard-tab{min-height:44px;padding:9px 12px;border:1px solid var(--line);border-radius:15px;color:#cbd5e1;background:#94a3b814;font-weight:900;transition:.16s ease}.dashboard-tab:hover{color:#fff;border-color:#38bdf86b;transform:translateY(-1px)}.dashboard-tab.active{color:#fff;border-color:#7dd3fc8c;background:linear-gradient(135deg,#2563ebe0,#0284c7b8);box-shadow:0 10px 24px #2563eb2e}.dashboard-class-list{position:relative;z-index:1;margin-top:14px}.dashboard-class-card{height:100%}.dashboard-class-card .ui-button{margin-top:auto}.panel-loading,.panel-empty{grid-column:1/-1;display:grid;place-items:center;gap:7px;min-height:150px;padding:28px;border:1px dashed rgba(148,163,184,.28);border-radius:22px;color:var(--muted);text-align:center;background:#02061733}.panel-empty strong{color:#fff;font-size:17px}.panel-empty span{max-width:520px;line-height:1.8}@media(max-width:900px){.dashboard-switcher{grid-template-columns:1fr}}@media(max-width:650px){.panel-nav{align-items:stretch;flex-direction:column}.panel-nav__group{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}.panel-nav>.ui-button{width:100%}.dashboard-tabs{grid-template-columns:1fr}}.admin-page{overflow-x:hidden}.admin-head{display:grid;gap:14px;margin-bottom:18px}.eyebrow{color:var(--muted);font-weight:800}.admin-nav{display:flex;gap:8px;overflow-x:auto;padding:8px;border:1px solid var(--line);border-radius:18px;background:#0f172a8c;scrollbar-width:thin}.admin-nav__item{flex:0 0 auto;min-height:40px;padding:9px 14px;border:1px solid rgba(148,163,184,.22);border-radius:14px;color:#dbeafe;text-decoration:none;font-weight:900;background:#94a3b814}.admin-nav__item:hover,.admin-nav__item:focus-visible{outline:3px solid rgba(56,189,248,.35);background:#2563eb38}.admin-nav__item.active{color:#fff;background:linear-gradient(135deg,#2563eb,#0284c7);border-color:#7dd3fca6}.admin-nav__item.danger{margin-inline-start:auto;color:#fecaca;border-color:#f8717159}.admin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin:14px 0}.stat-card,.admin-card{padding:16px;border:1px solid var(--line);border-radius:20px;background:#0f172a9e;box-shadow:0 12px 28px #0000002e}.stat-card strong{display:block;color:#fff;font-size:24px}.stat-card span,.detail-grid dt{color:var(--muted);font-size:13px}.admin-toolbar,.admin-form{display:grid;gap:12px;margin:14px 0;padding:16px;border:1px solid var(--line);border-radius:20px;background:#0f172a7a}.admin-toolbar{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));align-items:end}.admin-form label,.admin-form fieldset{display:grid;gap:6px}.admin-form input,.admin-form textarea,.admin-form select,.admin-toolbar input,.admin-toolbar select{width:100%;min-height:42px;padding:9px 12px;border:1px solid rgba(148,163,184,.28);border-radius:13px;color:#fff;background:#02061773}.admin-form textarea{min-height:130px}.check-row{display:flex!important;align-items:center;gap:8px}.check-row input{width:auto;min-height:auto}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px}.admin-table{width:100%;min-width:760px;border-collapse:collapse;background:#0f172a6b}.admin-table th,.admin-table td{padding:12px 14px;border-bottom:1px solid rgba(148,163,184,.15);text-align:start;vertical-align:top}.admin-table th{color:#bfdbfe;font-size:13px}.admin-table small{display:block;color:var(--muted);margin-top:3px}.pagination,.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:14px}.admin-alert{padding:11px 14px;border-radius:14px;border:1px solid rgba(34,197,94,.32);background:#1665342e;color:#dcfce7}.admin-alert.error{border-color:#f8717159;background:#7f1d1d38;color:#fee2e2}.admin-alert.warning{border-color:#fbbf2459;background:#78350f33;color:#fef3c7}.danger-btn{border:1px solid rgba(248,113,113,.42);border-radius:12px;padding:9px 12px;color:#fee2e2;background:#7f1d1d47}button:disabled,a[aria-disabled=true]{opacity:.55;cursor:not-allowed}.detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.detail-grid div{padding:12px;border-radius:14px;background:#02061747}.detail-grid dd{margin:4px 0 0;color:#fff;font-weight:800}@media(max-width:640px){.admin-toolbar{grid-template-columns:1fr}.admin-nav__item.danger{margin-inline-start:0}.route-card.wide{padding-inline:14px}}.admin-title-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}.status-pill.active,.status-pill.verified{background:#dcfce7;color:#166534}.status-pill.inactive,.status-pill.unverified{background:#fee2e2;color:#991b1b}.status-pill.neutral{background:#f1f5f9;color:#475569}.status-pill.role-admin{background:#ede9fe;color:#5b21b6}.status-pill.role-teacher{background:#dbeafe;color:#1d4ed8}.status-pill.role-student{background:#fef3c7;color:#92400e}.password-row{display:flex;gap:.5rem;align-items:center}.password-row input{flex:1}.password-toggle{white-space:nowrap}.field-error{min-height:1.25rem;color:#b91c1c;font-size:.85rem}.security-page{padding-block:20px}.security-shell{position:relative;overflow:hidden}.security-shell:before{position:absolute;inset:-100px auto auto -90px;width:300px;height:300px;border-radius:50%;background:#2563eb29;filter:blur(20px);content:"";pointer-events:none}.security-hero{position:relative;z-index:1;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:20px;border:1px solid rgba(148,163,184,.16);border-radius:24px;background:linear-gradient(135deg,#111c2fc7,#0f172a57)}.security-hero h1{color:#fff;font-size:clamp(24px,4vw,34px);white-space:normal}.security-hero .muted-block{margin-top:8px;line-height:1.8}.security-summary{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:8px;min-width:min(520px,100%)}.security-summary span{display:grid;gap:5px;padding:11px 12px;border:1px solid rgba(148,163,184,.16);border-radius:16px;color:#dbeafe;background:#02061747;font-size:12px}.security-summary b{color:var(--muted);font-size:10px}.security-stack{position:relative;z-index:1;display:grid;gap:16px;margin-top:18px}.security-card{padding:clamp(18px,3vw,26px);border:1px solid rgba(148,163,184,.16);border-radius:24px;background:linear-gradient(145deg,#111c2fe6,#02061757);box-shadow:0 16px 40px #0208172e}.security-card__head{display:grid;gap:8px;margin-bottom:18px}.security-card__head>div{display:flex;align-items:center;gap:10px}.security-card__head h2{margin:0;color:#fff;font-size:20px}.security-card__head p,.security-card__description{margin:0;color:var(--muted);line-height:1.8;font-size:13px}.security-card__head--row{grid-template-columns:minmax(0,1fr) auto;align-items:center}.security-step{display:inline-grid;place-items:center;width:30px;height:30px;border:1px solid rgba(125,211,252,.36);border-radius:10px;color:#e0f2fe;background:#2563eb38;font-weight:950}.security-form{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;align-items:end}.security-form--two{grid-template-columns:repeat(2,minmax(0,1fr)) auto}.security-form .ui-button,.security-confirm .ui-button{min-width:180px}.security-confirm{display:grid;grid-template-columns:minmax(220px,1fr) auto;align-items:end;gap:12px;margin-top:14px;padding-top:14px;border-top:1px solid rgba(148,163,184,.14)}.security-confirm[hidden]{display:none}@media(max-width:900px){.security-hero{flex-direction:column}.security-summary{width:100%;min-width:0}.security-form,.security-form--two{grid-template-columns:1fr 1fr}.security-form .ui-button{grid-column:1/-1;width:100%}}@media(max-width:650px){.security-page{padding:10px}.security-shell{padding:14px;border-radius:22px}.security-hero{padding:16px}.security-summary{grid-template-columns:1fr}.security-card{padding:16px;border-radius:20px}.security-card__head--row{grid-template-columns:1fr}.security-card__head--row .ui-button{width:100%}.security-form,.security-form--two,.security-confirm{grid-template-columns:1fr}.security-form .ui-button,.security-confirm .ui-button{grid-column:auto;width:100%;min-width:0}}.sessions-list{display:grid;gap:10px;margin-top:14px}.session-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px;border:1px solid rgba(148,163,184,.16);border-radius:19px;background:#94a3b80f}.session-card--current{border-color:#22c55e52;background:#22c55e0f}.session-card__main{min-width:0;flex:1}.session-card__title{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:10px}.session-card__title strong{color:#fff}.session-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:8px}.session-meta span{display:grid;gap:4px;min-width:0;padding:9px 10px;border-radius:13px;color:#dbeafe;background:#0206173d;font-size:12px;overflow-wrap:anywhere}.session-meta b{color:var(--muted);font-size:10px}.session-meta code{color:#bae6fd;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.confirm-dialog{width:min(430px,calc(100vw - 24px));padding:0;border:1px solid rgba(148,163,184,.2);border-radius:24px;color:var(--text);background:transparent;box-shadow:0 24px 80px #0208178c}.confirm-dialog::backdrop{background:#020617b8;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.confirm-dialog__card{display:grid;gap:12px;padding:24px;border-radius:24px;background:linear-gradient(145deg,#111c2f,#07111f)}.confirm-dialog__card strong{color:#fff;font-size:20px}.confirm-dialog__card p{color:var(--muted);line-height:1.8}.confirm-dialog__actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:6px}@media(max-width:650px){.session-card{align-items:stretch;flex-direction:column}.session-card .ui-button{width:100%}.confirm-dialog__actions{grid-template-columns:1fr}}