@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--scu-primary: #4f46e5;--scu-primary-hover: #4338ca;--scu-primary-muted: #eef2ff;--scu-accent: #7c3aed;--scu-accent-hover: #6d28d9;--scu-accent-muted: #f5f3ff;--scu-success: #059669;--scu-success-muted: #d1fae5;--scu-warning: #d97706;--scu-warning-muted: #fef3c7;--scu-error: #dc2626;--scu-error-muted: #fee2e2;--scu-slate-50: #f8fafc;--scu-slate-100: #f1f5f9;--scu-slate-200: #e2e8f0;--scu-slate-300: #cbd5e1;--scu-slate-400: #94a3b8;--scu-slate-500: #64748b;--scu-slate-600: #475569;--scu-slate-700: #334155;--scu-slate-800: #1e293b;--scu-slate-900: #0f172a;--scu-bg: #ffffff;--scu-bg-subtle: var(--scu-slate-50);--scu-border: var(--scu-slate-200);--scu-text: var(--scu-slate-900);--scu-text-muted: var(--scu-slate-600);--scu-font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--scu-text-xs: .75rem;--scu-text-sm: .8125rem;--scu-text-base: .9375rem;--scu-text-md: 1rem;--scu-text-lg: 1.125rem;--scu-text-xl: 1.25rem;--scu-text-2xl: 1.5rem;--scu-text-3xl: 1.875rem;--scu-font-normal: 400;--scu-font-medium: 500;--scu-font-semibold: 600;--scu-font-bold: 700;--scu-space-1: .25rem;--scu-space-2: .5rem;--scu-space-3: .75rem;--scu-space-4: 1rem;--scu-space-5: 1.25rem;--scu-space-6: 1.5rem;--scu-space-8: 2rem;--scu-space-10: 2.5rem;--scu-space-12: 3rem;--scu-space-16: 4rem;--scu-radius-sm: 4px;--scu-radius-md: 8px;--scu-radius-lg: 12px;--scu-radius-xl: 16px;--scu-radius-full: 9999px;--scu-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--scu-shadow-md: 0 4px 12px rgba(15, 23, 42, .08);--scu-shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);--scu-shadow-toolbar: 0 8px 32px rgba(15, 23, 42, .14);--scu-transition-fast: .15s ease;--scu-transition-normal: .25s ease;--scu-header-height: 3.5rem;--scu-max-content: 72rem;--scu-break-sm: 480px;--scu-break-md: 768px;--scu-break-lg: 1024px;--scu-break-xl: 1280px}[data-theme=dark]{--scu-bg: #0f172a;--scu-bg-subtle: #1e293b;--scu-border: #334155;--scu-text: #f8fafc;--scu-text-muted: #94a3b8}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-rendering:optimizeLegibility}body{margin:0;min-height:100vh;font-family:var(--scu-font-sans);font-size:var(--scu-text-base);font-weight:var(--scu-font-normal);line-height:1.5;color:var(--scu-text);background:var(--scu-bg-subtle);-webkit-font-smoothing:antialiased}#root{min-height:100vh}img,picture,video,canvas,svg{display:block;max-width:100%}button,input,select,textarea{font:inherit}a{color:var(--scu-primary);text-decoration:none;transition:color var(--scu-transition-fast)}a:hover{color:var(--scu-primary-hover);text-decoration:underline}:focus-visible{outline:2px solid var(--scu-primary);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.scu-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--scu-space-2);padding:var(--scu-space-2) var(--scu-space-4);font-size:var(--scu-text-sm);font-weight:var(--scu-font-medium);line-height:1.25;border-radius:var(--scu-radius-md);border:1px solid transparent;cursor:pointer;transition:background var(--scu-transition-fast),border-color var(--scu-transition-fast),color var(--scu-transition-fast),box-shadow var(--scu-transition-fast)}.scu-btn:disabled{opacity:.5;cursor:not-allowed}.scu-btn--primary{background:var(--scu-primary);color:#fff;border-color:var(--scu-primary)}.scu-btn--primary:hover:not(:disabled){background:var(--scu-primary-hover);border-color:var(--scu-primary-hover)}.scu-btn--secondary{background:var(--scu-bg);color:var(--scu-primary);border-color:var(--scu-primary)}.scu-btn--secondary:hover:not(:disabled){background:var(--scu-primary-muted)}.scu-btn--ghost{background:transparent;color:var(--scu-text-muted);border-color:var(--scu-border)}.scu-btn--ghost:hover:not(:disabled){background:var(--scu-slate-100);color:var(--scu-text)}.scu-btn--danger{background:transparent;color:var(--scu-error);border-color:var(--scu-error)}.scu-btn--danger:hover:not(:disabled){background:var(--scu-error-muted)}.scu-btn--icon{padding:var(--scu-space-2);min-width:2.25rem;min-height:2.25rem}.scu-btn--lg{padding:var(--scu-space-3) var(--scu-space-5);font-size:var(--scu-text-md)}.scu-field{display:flex;flex-direction:column;gap:var(--scu-space-1)}.scu-field__label{font-size:var(--scu-text-sm);font-weight:var(--scu-font-medium);color:var(--scu-text)}.scu-field__input{width:100%;padding:var(--scu-space-2) var(--scu-space-3);font-size:var(--scu-text-md);border:1px solid var(--scu-border);border-radius:var(--scu-radius-md);background:var(--scu-bg);color:var(--scu-text);transition:border-color var(--scu-transition-fast),box-shadow var(--scu-transition-fast)}.scu-field__input:focus{outline:none;border-color:var(--scu-primary);box-shadow:0 0 0 3px var(--scu-primary-muted)}.scu-field__input:disabled{opacity:.6;cursor:not-allowed}.scu-field__error{margin:0;font-size:var(--scu-text-xs);color:var(--scu-error)}.scu-card{background:var(--scu-bg);border:1px solid var(--scu-border);border-radius:var(--scu-radius-lg);box-shadow:var(--scu-shadow-sm);overflow:hidden}.scu-card__header{padding:var(--scu-space-4) var(--scu-space-5);border-bottom:1px solid var(--scu-border);font-weight:var(--scu-font-semibold);font-size:var(--scu-text-md)}.scu-card__body{padding:var(--scu-space-5)}.scu-badge{display:inline-flex;align-items:center;padding:.125rem .5rem;font-size:var(--scu-text-xs);font-weight:var(--scu-font-medium);border-radius:var(--scu-radius-full);text-transform:capitalize}.scu-badge--success{background:var(--scu-success-muted);color:var(--scu-success)}.scu-badge--neutral{background:var(--scu-slate-100);color:var(--scu-slate-600)}.scu-badge--warning{background:var(--scu-warning-muted);color:var(--scu-warning)}.scu-avatar{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border-radius:var(--scu-radius-full);font-size:var(--scu-text-sm);font-weight:var(--scu-font-semibold);color:#fff;flex-shrink:0}.scu-modal__backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:var(--scu-space-4);background:#0f172a73;animation:scu-fade-in var(--scu-transition-normal)}.scu-modal__panel{width:100%;max-width:28rem;max-height:calc(100vh - 2rem);overflow:auto;background:var(--scu-bg);border-radius:var(--scu-radius-xl);box-shadow:var(--scu-shadow-lg);animation:scu-scale-in var(--scu-transition-normal)}@keyframes scu-fade-in{0%{opacity:0}to{opacity:1}}@keyframes scu-scale-in{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.scu-app-loading{min-height:100vh;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:var(--scu-space-3);padding:var(--scu-space-8);color:var(--scu-text-muted);font-size:var(--scu-text-md)}.scu-app-loading:after{content:"";width:1.25rem;height:1.25rem;border:2px solid var(--scu-slate-200);border-top-color:var(--scu-primary);border-radius:50%;animation:scu-spin .7s linear infinite}@keyframes scu-spin{to{transform:rotate(360deg)}}.scu-auth-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--scu-space-6) var(--scu-space-4);background:linear-gradient(160deg,var(--scu-primary-muted) 0%,var(--scu-bg-subtle) 45%,var(--scu-accent-muted) 100%)}.scu-auth-brand{text-align:center;margin-bottom:var(--scu-space-6)}.scu-auth-brand__title{margin:0;font-size:var(--scu-text-3xl);font-weight:var(--scu-font-bold);letter-spacing:-.02em;color:var(--scu-slate-900)}.scu-auth-brand__subtitle{margin:var(--scu-space-2) 0 0;font-size:var(--scu-text-sm);color:var(--scu-text-muted);max-width:20rem}.scu-auth-card{width:100%;max-width:26rem}.scu-auth-card .scu-card__body{padding:var(--scu-space-6)}.scu-auth-card h1{margin:0 0 var(--scu-space-1);font-size:var(--scu-text-xl);font-weight:var(--scu-font-semibold)}.scu-auth-card>.scu-card__body>p:first-of-type{margin:0 0 var(--scu-space-5);font-size:var(--scu-text-sm);color:var(--scu-text-muted)}.scu-auth-form{display:flex;flex-direction:column;gap:var(--scu-space-4)}.scu-auth-banner{margin:0 0 var(--scu-space-4);padding:var(--scu-space-3) var(--scu-space-4);font-size:var(--scu-text-sm);border-radius:var(--scu-radius-md);background:var(--scu-success-muted);color:var(--scu-success)}.scu-auth-divider{display:flex;align-items:center;gap:var(--scu-space-3);margin:var(--scu-space-5) 0;color:var(--scu-slate-500);font-size:var(--scu-text-xs);text-transform:uppercase;letter-spacing:.06em}.scu-auth-divider:before,.scu-auth-divider:after{content:"";flex:1;height:1px;background:var(--scu-border)}.scu-auth-oauth{display:flex;flex-direction:column;gap:var(--scu-space-2)}.scu-auth-footer{margin-top:var(--scu-space-5);text-align:center;font-size:var(--scu-text-sm);color:var(--scu-text-muted)}.scu-auth-footer a{font-weight:var(--scu-font-medium)}.scu-dash{min-height:100vh;background:var(--scu-bg-subtle)}.scu-dash__bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--scu-space-4);padding:var(--scu-space-3) var(--scu-space-5);background:var(--scu-bg);border-bottom:1px solid var(--scu-border);position:sticky;top:0;z-index:10}.scu-dash__brand{font-size:var(--scu-text-lg);font-weight:var(--scu-font-bold);color:var(--scu-slate-900);text-decoration:none}.scu-dash__brand:hover{text-decoration:none;color:var(--scu-primary)}.scu-dash__user{display:flex;align-items:center;gap:var(--scu-space-3)}.scu-dash__user-meta{font-size:var(--scu-text-sm);color:var(--scu-text-muted);text-align:right}.scu-dash__user-meta strong{color:var(--scu-text);display:block}.scu-dash__main{max-width:var(--scu-max-content);margin:0 auto;padding:var(--scu-space-6) var(--scu-space-4) var(--scu-space-10)}.scu-dash__hero{margin-bottom:var(--scu-space-8)}.scu-dash__hero-title{margin:0 0 var(--scu-space-2);font-size:var(--scu-text-2xl);font-weight:var(--scu-font-semibold)}.scu-dash__hero-desc{margin:0 0 var(--scu-space-5);font-size:var(--scu-text-sm);color:var(--scu-text-muted);max-width:36rem}.scu-dash__create{display:flex;flex-wrap:wrap;gap:var(--scu-space-3);align-items:stretch}.scu-dash__create .scu-field{flex:1 1 14rem;margin:0}.scu-dash__create .scu-field__input{min-height:2.75rem}.scu-dash__section-title{margin:0 0 var(--scu-space-4);font-size:var(--scu-text-lg);font-weight:var(--scu-font-semibold)}.scu-dash__grid{display:grid;grid-template-columns:1fr;gap:var(--scu-space-4)}@media (min-width: 768px){.scu-dash__grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1024px){.scu-dash__grid{grid-template-columns:repeat(3,1fr)}}.scu-dash-session{display:flex;flex-direction:column;gap:var(--scu-space-4)}.scu-dash-session.scu-card 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var(--scu-space-4);background:var(--scu-bg);border:1px dashed var(--scu-border);border-radius:var(--scu-radius-lg)}.scu-dash-empty__icon{font-size:2.5rem;margin-bottom:var(--scu-space-3)}.scu-dash-empty h3{margin:0 0 var(--scu-space-2);font-size:var(--scu-text-lg)}.scu-dash-empty p{font-size:var(--scu-text-sm);color:var(--scu-text-muted);max-width:22rem;margin:0 auto}.scu-dash-toast{margin-top:var(--scu-space-4);padding:var(--scu-space-2) var(--scu-space-3);font-size:var(--scu-text-sm);border-radius:var(--scu-radius-md);background:var(--scu-success-muted);color:var(--scu-success)}.scu-dash-toast--error{background:var(--scu-error-muted);color:var(--scu-error)}.dashboard-loading{padding:2rem;text-align:center;color:#495057;font-size:1rem}.synced{color:green;font-size:.9rem;margin-right:.5rem}.syncing{color:#666;font-size:.9rem;margin-right:.5rem}.canvas-workspace{display:flex;flex-direction:column;height:100%;min-height:0;padding-bottom:5.5rem}@media (min-width: 768px){.canvas-workspace{padding-bottom:6.5rem}}.toolbar{padding:.5rem 1rem;background:#f1f1f1;display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.toolbar-group{display:flex;gap:.25rem;align-items:center;border-right:1px solid #d0d0d0;padding-right:.5rem}.toolbar button,.toolbar select{padding:.4rem .6rem;border-radius:4px;border:1px solid #ccc;background:#fff;cursor:pointer;font-size:.85rem;transition:background .15s,border-color .15s}.toolbar button:hover:not(:disabled){background:#e8e8e8}.toolbar button:disabled{opacity:.4;cursor:default}.toolbar button.tool-active{background:#d0e4ff;border-color:#4a90d9;font-weight:600}.toolbar button.tool-eraser.tool-active{background:#ffe0e0;border-color:#d94a4a}.toolbar button.tool-danger{color:#c0392b;border-color:#e0a0a0}.toolbar button.tool-danger:hover{background:#fde8e8}.toolbar .color-btn{width:24px;height:24px;padding:0;border-radius:50%;border:2px solid #bbb;min-width:24px}.toolbar 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.5rem}.student-pixi-host{flex:1;width:100%;min-height:300px;display:flex;justify-content:center;align-items:center}.student-pixi-host canvas{border-radius:4px;box-shadow:0 2px 8px #00000014}.student-text-overlay{font-family:system-ui,sans-serif;padding:2px 4px;border:1px solid #94a3b8;border-radius:4px;background:#ffffffeb;resize:both}.canvas-container canvas{border-radius:4px;box-shadow:0 2px 8px #00000014}.freeze-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#0000002e;-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px);z-index:50;pointer-events:auto}.freeze-overlay-content{background:#ffffffeb;border-radius:16px;padding:1.5rem 2rem;text-align:center;box-shadow:0 4px 24px #0000001f}.freeze-overlay-content .freeze-icon{font-size:2rem;display:block;margin-bottom:.25rem}.freeze-overlay-content p{margin:0;font-weight:600;color:#334155;font-size:1rem}.symbol-palette{display:flex;flex-wrap:wrap;gap:.35rem;padding:.35rem 1rem;background:#f8f4ff;border-bottom:1px solid #e2d9f3}.symbol-group{display:flex;align-items:center;gap:2px;flex-wrap:wrap}.symbol-group-label{font-size:.65rem;color:#7c3aed;font-weight:600;text-transform:uppercase;letter-spacing:.03em;margin-right:2px;-webkit-user-select:none;user-select:none}.symbol-btn{width:28px;height:28px;padding:0;font-size:.95rem;line-height:28px;text-align:center;border:1px solid #d4c8ef;border-radius:4px;background:#fff;cursor:pointer;color:#1e1b4b;transition:background .12s,border-color .12s}.symbol-btn:hover{background:#ede9fe;border-color:#7c3aed}.symbol-btn:focus-visible{outline:2px solid #7c3aed;outline-offset:1px}.student-timer{text-align:center;font-size:1.4rem;font-weight:700;font-family:Courier New,monospace;color:#1e293b;padding:.35rem 1rem;background:#f1f5f9;border-bottom:1px solid #e2e8f0}.student-timer-urgent{color:#dc2626;background:#fef2f2;animation:pulse-student-timer .8s infinite}@keyframes pulse-student-timer{0%,to{opacity:1}50%{opacity:.5}}.canvas-focus-mode .toolbar-shell .toolbar.toolbar--floating.toolbar-focus{max-width:min(94vw,480px)}.toolbar button.tool-highlight.tool-active{background:#fef9c3;border-color:#ca8a04}.toolbar button.tool-sticky.tool-active{background:#fef08a;border-color:#ca8a04}.student-sticky-overlay{border-radius:6px;border:1px solid #bbb88a;font-family:system-ui,sans-serif}.sticky-color-bar{display:flex;align-items:center;gap:.35rem;padding:.3rem 1rem;background:#fffbeb;border-bottom:1px solid #fde68a}.sticky-color-label{font-size:.75rem;color:#92400e;font-weight:600;-webkit-user-select:none;user-select:none}.sticky-color-active{outline:2px solid #92400e;outline-offset:1px}.stem-ruler,.stem-protractor{-webkit-user-select:none;user-select:none;touch-action:none}.stem-rotate-btn{position:absolute;top:2px;right:4px;width:22px;height:22px;border-radius:50%;border:1px solid #94a3b8;background:#fff;cursor:pointer;font-size:.85rem;line-height:1;padding:0}.stem-calculator{background:#fff;border:1px solid #94a3b8;border-radius:8px;box-shadow:0 4px 16px #0000001f;width:180px;-webkit-user-select:none;user-select:none}.calc-header{padding:.3rem .5rem;background:#f1f5f9;border-bottom:1px solid #e2e8f0;font-size:.75rem;font-weight:600;color:#475569;border-radius:8px 8px 0 0}.calc-display{padding:.4rem .5rem;text-align:right;font-family:Courier New,monospace;font-size:1.1rem;min-height:1.5rem;border-bottom:1px solid #e2e8f0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;padding:4px}.calc-btn{padding:.35rem;border:1px solid #e2e8f0;border-radius:4px;background:#fff;cursor:pointer;font-size:.85rem}.calc-btn:hover{background:#f1f5f9}.calc-btn-ins{background:#dbeafe;font-weight:600}.grid-select{padding:.3rem .5rem;border-radius:4px;border:1px solid #ccc;font-size:.8rem;background:#fff;cursor:pointer}.toolbar-shell{position:fixed;left:0;right:0;bottom:0;z-index:100;display:flex;flex-direction:column;align-items:center;gap:.45rem;padding:.5rem .75rem calc(.5rem + env(safe-area-inset-bottom,0));pointer-events:none}.toolbar-shell>*{pointer-events:auto}.toolbar.toolbar--floating{max-width:min(96vw,1100px);margin:0 auto;flex-wrap:wrap;justify-content:center;padding:.4rem .85rem;border-radius:9999px;background:#fffffff5;border:1px solid var(--scu-border, #e2e8f0);box-shadow:var(--scu-shadow-toolbar, 0 8px 32px rgba(15, 23, 42, .14));gap:.35rem}.toolbar-secondary.toolbar--floating{border-radius:9999px;max-width:min(96vw,720px)}.toolbar-sync{display:inline-flex;align-items:center;gap:.25rem;font-size:.7rem;font-weight:600;color:#64748b;padding:0 .25rem}.toolbar-sync--live{color:#059669}.toolbar-sync-dot{width:.4rem;height:.4rem;border-radius:50%;background:#cbd5e1}.toolbar-sync--live .toolbar-sync-dot{background:#059669;animation:toolbar-sync-pulse 1.5s ease-in-out infinite}@keyframes toolbar-sync-pulse{0%,to{opacity:1}50%{opacity:.45}}.toolbar-btn-text{margin-left:.15rem}@media (max-width: 768px){.toolbar--floating .toolbar-btn-text,.toolbar-sync-label{display:none}}.toolbar-flyout{position:relative}.toolbar-flyout__summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:.2rem;padding:.4rem .55rem;border-radius:4px;border:1px solid #ccc;background:#fff;font-size:.85rem}.toolbar-flyout__summary::-webkit-details-marker{display:none}.toolbar-flyout__panel{position:absolute;bottom:calc(100% + .35rem);left:50%;transform:translate(-50%);min-width:8.5rem;padding:.35rem;display:flex;flex-direction:column;gap:.25rem;background:#fff;border:1px solid #e2e8f0;border-radius:8px;box-shadow:0 8px 24px #0000001f;z-index:120}.toolbar-flyout__panel--wide{min-width:11rem;flex-wrap:wrap;flex-direction:row;max-width:min(90vw,20rem)}.toolbar-flyout__panel button{flex:1 1 40%}.toolbar-flyout__grid-label{display:flex;flex-direction:column;gap:.15rem;font-size:.75rem;color:#475569;width:100%;padding:.25rem}.toolbar-flyout__grid-label .grid-select{width:100%}.scu-sj-board{min-height:100vh;display:flex;flex-direction:column;background:var(--scu-bg-subtle)}.scu-sj-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--scu-space-2);padding:var(--scu-space-2) var(--scu-space-4);background:var(--scu-bg);border-bottom:1px solid var(--scu-border);flex-shrink:0}.scu-sj-bar__session{font-weight:var(--scu-font-semibold);font-size:var(--scu-text-sm)}.scu-sj-bar__student{display:flex;align-items:center;gap:var(--scu-space-2);font-size:var(--scu-text-sm);color:var(--scu-text-muted)}.scu-sj-board__canvas{flex:1;min-height:0}.scu-sj-form-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--scu-space-6) var(--scu-space-4);background:linear-gradient(160deg,var(--scu-primary-muted) 0%,var(--scu-bg-subtle) 50%,var(--scu-accent-muted) 100%)}.scu-sj-form-card{width:100%;max-width:26rem}.scu-sj-form-card .scu-card__body{padding:var(--scu-space-6)}.scu-sj-form-card h1{margin:0 0 var(--scu-space-1);font-size:var(--scu-text-xl)}.scu-sj-form-card .scu-session-name{margin:0 0 var(--scu-space-1);font-size:var(--scu-text-sm);color:var(--scu-primary);font-weight:var(--scu-font-medium)}.scu-sj-form-card .scu-sub{margin:0 0 var(--scu-space-5);font-size:var(--scu-text-sm);color:var(--scu-text-muted)}.scu-sj-invalid{padding:var(--scu-space-6);max-width:28rem;margin:0 auto}.expanded-canvas-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:var(--scu-space-4, 1rem);background:#0f172a8c}.expanded-canvas-modal{width:min(90vw,1120px);max-height:min(85vh,900px);background:var(--scu-bg, #fff);border-radius:var(--scu-radius-lg, 12px);box-shadow:var(--scu-shadow-lg, 0 12px 40px rgba(15, 23, 42, .18));display:flex;flex-direction:column;overflow:hidden}.expanded-canvas-header{display:flex;align-items:center;gap:var(--scu-space-3, .75rem);padding:var(--scu-space-3, .75rem) var(--scu-space-4, 1rem);border-bottom:1px solid var(--scu-border, #eee);flex-shrink:0}.expanded-canvas-title{margin:0;flex:1;min-width:0;font-size:var(--scu-text-lg, 1.125rem);font-weight:var(--scu-font-semibold, 600);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.expanded-sync-badge{display:inline-flex;align-items:center;gap:.35rem;font-size:var(--scu-text-xs, .75rem);font-weight:var(--scu-font-medium, 500);color:var(--scu-slate-500, #64748b)}.expanded-sync-badge--live{color:var(--scu-success, #059669)}.expanded-sync-dot{width:.45rem;height:.45rem;border-radius:9999px;background:var(--scu-slate-300, #cbd5e1)}.expanded-sync-badge--live .expanded-sync-dot{background:var(--scu-success, #059669);animation:expanded-pulse 1.5s ease-in-out infinite}@keyframes expanded-pulse{0%,to{opacity:1}50%{opacity:.45}}.expanded-annotate-switch{display:inline-flex;align-items:center;gap:.5rem;cursor:pointer;-webkit-user-select:none;user-select:none;position:relative}.expanded-annotate-switch input{position:absolute;opacity:0;width:0;height:0}.expanded-annotate-switch__track{width:2.5rem;height:1.35rem;border-radius:9999px;background:var(--scu-slate-200, #e2e8f0);transition:background var(--scu-transition-fast, .15s ease);position:relative}.expanded-annotate-switch__track:after{content:"";position:absolute;top:2px;left:2px;width:calc(1.35rem - 4px);height:calc(1.35rem - 4px);border-radius:50%;background:#fff;box-shadow:var(--scu-shadow-sm, 0 1px 2px rgba(0, 0, 0, .08));transition:transform var(--scu-transition-fast, .15s ease)}.expanded-annotate-switch input:checked+.expanded-annotate-switch__track{background:var(--scu-accent, #7c3aed)}.expanded-annotate-switch input:checked+.expanded-annotate-switch__track:after{transform:translate(1.15rem)}.expanded-annotate-switch__label{font-size:var(--scu-text-sm, .8125rem);font-weight:var(--scu-font-medium, 500);color:var(--scu-slate-700, #334155)}.expanded-annotate-switch input:focus-visible+.expanded-annotate-switch__track{outline:2px solid var(--scu-primary, #4f46e5);outline-offset:2px}.expanded-canvas-close{margin-left:auto;width:2.25rem;height:2.25rem;padding:0;display:inline-flex;align-items:center;justify-content:center;font-size:1.35rem;line-height:1;cursor:pointer;background:var(--scu-slate-100, #f1f5f9);color:var(--scu-slate-700, #334155);border:1px solid var(--scu-border, #e2e8f0);border-radius:var(--scu-radius-md, 8px);transition:background var(--scu-transition-fast, .15s ease),color var(--scu-transition-fast, .15s ease)}.expanded-canvas-close:hover{background:var(--scu-slate-200, #e2e8f0);color:var(--scu-slate-900, #0f172a)}.expanded-canvas-body{flex:1;min-height:0;min-width:0;padding:var(--scu-space-2, .5rem);display:flex;align-items:center;justify-content:center;overflow:auto}@media (max-width: 480px){.expanded-canvas-overlay{padding:0;align-items:stretch}.expanded-canvas-modal{width:100%;height:100%;max-height:none;border-radius:0}}.expanded-canvas-loading{padding:2rem;color:var(--scu-text-muted, #666)}.scu-ts{min-height:100vh;background:var(--scu-bg-subtle)}.scu-ts__header{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--scu-space-3);padding:var(--scu-space-3) var(--scu-space-4);background:var(--scu-bg);border-bottom:1px solid var(--scu-border);box-shadow:var(--scu-shadow-sm)}.scu-ts__back{display:inline-flex;align-items:center;gap:var(--scu-space-2);font-size:var(--scu-text-sm);font-weight:var(--scu-font-medium);color:var(--scu-text-muted);text-decoration:none}.scu-ts__back:hover{color:var(--scu-primary);text-decoration:none}.scu-ts__title-block{flex:1 1 12rem;min-width:0}.scu-ts__title{margin:0;font-size:var(--scu-text-lg);font-weight:var(--scu-font-semibold);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.scu-ts__counts{margin:.125rem 0 0;font-size:var(--scu-text-xs);color:var(--scu-text-muted)}.scu-ts__actions{display:flex;flex-wrap:wrap;gap:var(--scu-space-2);align-items:center}.scu-ts__main{max-width:var(--scu-max-content);margin:0 auto;padding:var(--scu-space-5) var(--scu-space-4) var(--scu-space-10)}.scu-ts__empty{text-align:center;padding:var(--scu-space-10) var(--scu-space-4);background:var(--scu-bg);border:1px dashed var(--scu-border);border-radius:var(--scu-radius-lg)}.scu-ts__empty p{margin:0 0 var(--scu-space-4);color:var(--scu-text-muted);font-size:var(--scu-text-sm)}.scu-ts__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--scu-space-4)}.scu-ts-tile{display:flex;flex-direction:column;background:var(--scu-bg);border:1px solid var(--scu-border);border-radius:var(--scu-radius-lg);overflow:hidden;box-shadow:var(--scu-shadow-sm);cursor:pointer;text-align:left;padding:0;transition:transform var(--scu-transition-fast),box-shadow var(--scu-transition-fast)}.scu-ts-tile:hover{transform:translateY(-2px);box-shadow:var(--scu-shadow-md)}.scu-ts-tile:focus-visible{outline:2px solid var(--scu-primary);outline-offset:2px}.scu-ts-tile__thumb-wrap{aspect-ratio:16 / 10;background:var(--scu-slate-100);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--scu-border)}.scu-ts-tile__thumb-wrap img{width:100%;height:100%;object-fit:contain}.scu-ts-tile__placeholder{font-size:var(--scu-text-xs);color:var(--scu-slate-400);padding:var(--scu-space-3)}.scu-ts-tile__footer{display:flex;align-items:center;justify-content:space-between;gap:var(--scu-space-2);padding:var(--scu-space-3)}.scu-ts-tile__name{flex:1;min-width:0;font-size:var(--scu-text-sm);font-weight:var(--scu-font-medium);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.scu-ts-presence{width:.5rem;height:.5rem;border-radius:var(--scu-radius-full);flex-shrink:0;background:var(--scu-slate-300)}.scu-ts-presence--online{background:var(--scu-success);box-shadow:0 0 0 2px var(--scu-success-muted);animation:scu-pulse-dot 2s ease-in-out infinite}@keyframes scu-pulse-dot{0%,to{opacity:1}50%{opacity:.65}}.scu-ts-tile__open{flex-shrink:0;font-size:var(--scu-text-xs);color:var(--scu-primary);font-weight:var(--scu-font-medium)}.scu-ts-page-msg{max-width:28rem;margin:0 auto;padding:var(--scu-space-8) var(--scu-space-4);text-align:center}.scu-ts-page-msg h1{font-size:var(--scu-text-xl);margin:0 0 var(--scu-space-2)}.scu-ts-page-msg p{color:var(--scu-text-muted);margin:0 0 var(--scu-space-4)}