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var(--space-4)}.chat-brand{font-size:1.8rem}.page-scroll{padding:var(--space-5) var(--space-4)}}@media(max-width:480px){.chat-brand{font-size:1.5rem}.chat-input-pill{border-radius:var(--radius-lg)}}.sidebar-conv-menu-btn{display:none;align-items:center;justify-content:center;width:24px;height:24px;border-radius:var(--radius-sm);background:none;border:none;color:var(--text-muted);cursor:pointer;flex-shrink:0;transition:all var(--transition-fast);position:relative;z-index:2}.sidebar-conv-menu-btn:hover{color:var(--text-primary);background:var(--bg-active)}.sidebar-conv:hover .sidebar-conv-menu-btn,.sidebar-conv.active .sidebar-conv-menu-btn{display:flex}.sidebar-conv-btn{flex:1;min-width:0}.sidebar-conv-menu{position:absolute;top:calc(100% + 4px);right:0;min-width:140px;background:var(--bg-elevated);border:1px solid var(--border-secondary);border-radius:var(--radius-md);padding:4px 0;box-shadow:var(--shadow-lg);z-index:var(--z-modal)}.sidebar-conv-menu button{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:7px 12px;font-size:.78rem;color:var(--text-secondary);background:none;border:none;cursor:pointer;font-family:var(--font-sans);transition:all var(--transition-fast);text-align:left}.sidebar-conv-menu button:hover{background:var(--bg-hover);color:var(--text-primary)}.msg-loading-state{display:flex;align-items:center;gap:var(--space-3);color:var(--text-tertiary);font-size:.85rem}.msg-loading-label{font-size:.82rem;color:var(--text-muted)}.msg-search-icon{color:var(--accent-primary);animation:searchSpin 2s linear infinite}@keyframes searchSpin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.vid-pill{flex-direction:column;padding:6px;gap:0}.vid-pill textarea{border:none;background:none;padding:8px;min-height:24px;max-height:160px;overflow-y:auto;resize:none}.vid-pill textarea:focus{box-shadow:none;border:none}.vid-input-row{display:flex;align-items:flex-end;width:100%;gap:4px}.vid-input-row textarea{flex:1}.vid-input-row .chat-send-btn,.vid-options-bar .chat-send-btn{position:relative;right:auto;bottom:auto}.vid-options-bar{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) var(--space-2) var(--space-1);flex-wrap:wrap}.vid-chip{padding:5px 12px;border-radius:var(--radius-full);font-size:.75rem;font-weight:500;font-family:var(--font-sans);color:var(--text-tertiary);background:var(--bg-tertiary);border:1px solid var(--border-primary);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.vid-chip:hover{border-color:var(--border-secondary);color:var(--text-secondary)}.vid-chip.active{background:var(--text-primary);color:var(--bg-primary);border-color:var(--text-primary);font-weight:600}.vid-chip--dropdown{display:flex;align-items:center;gap:4px}.vid-divider{width:1px;height:16px;background:var(--border-primary);flex-shrink:0}.vid-ratio-dropdown{position:absolute;bottom:calc(100% + 8px);right:0;min-width:160px;background:var(--bg-elevated);border:1px solid var(--border-secondary);border-radius:var(--radius-lg);padding:var(--space-2);box-shadow:var(--shadow-lg);z-index:var(--z-dropdown)}.vid-ratio-option{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 12px;border-radius:var(--radius-md);border:none;background:none;cursor:pointer;font-family:var(--font-sans);transition:all var(--transition-fast)}.vid-ratio-option:hover{background:var(--bg-hover)}.vid-ratio-option.active{background:var(--bg-active)}.vid-ratio-value{font-size:.82rem;font-weight:600;color:var(--text-primary)}.vid-ratio-desc{font-size:.72rem;color:var(--text-muted)}.vid-ref-bar{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) var(--space-2) 0}.vid-ref-thumb{width:48px;height:48px;border-radius:var(--radius-md);object-fit:cover;border:1px solid var(--border-primary)}.vid-ref-remove{width:20px;height:20px;border-radius:var(--radius-full);background:var(--bg-active);border:none;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.vid-ref-remove:hover{background:var(--error-bg);color:var(--error)}.vid-upload-btn{width:36px;height:36px;border-radius:var(--radius-full);background:none;border:none;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--transition-fast)}.vid-upload-btn:hover{color:var(--text-primary)}.vid-loading-card{max-height:70vh;width:100%;min-height:200px;background:#1e1e28cc;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-xl);position:relative;overflow:hidden;box-shadow:0 8px 32px #0006,inset 0 1px #ffffff0d}.vid-loading-dots{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;grid-template-columns:repeat(10,1fr);gap:8px;padding:16px;align-content:stretch;justify-items:center;align-items:center}.vid-dot{width:8px;height:8px;border-radius:50%;background:#6366f14d;box-shadow:0 0 6px #6366f133;animation:vidDotPulse 2s ease-in-out infinite}@keyframes vidDotPulse{0%,to{opacity:.3;transform:scale(.7);background:#6366f133}50%{opacity:1;transform:scale(1.2);background:#6366f1b3;box-shadow:0 0 12px #6366f180}}.vid-loading-bar{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:var(--space-3);padding:10px 22px;background:#14141eb3;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-full);font-size:.82rem;font-weight:500;color:var(--text-primary);white-space:nowrap;box-shadow:0 4px 16px #0000004d}.vid-loading-divider{color:var(--text-muted)}.vid-loading-cancel{background:none;border:none;color:var(--text-tertiary);cursor:pointer;font-family:var(--font-sans);font-size:.82rem;transition:color var(--transition-fast)}.vid-loading-cancel:hover{color:var(--text-primary)}.vid-pill{position:relative;overflow:visible}.vid-pill:after{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;border-radius:inherit;background:conic-gradient(from var(--glow-angle, 0deg),transparent 30%,var(--accent-primary),var(--accent-secondary),transparent 70%);z-index:-1;opacity:0;transition:opacity .3s ease;animation:glowRotate 3s linear infinite}.vid-pill:focus-within:after{opacity:1}@property --glow-angle{syntax: "<angle>"; initial-value: 0deg; inherits: false;}@keyframes glowRotate{to{--glow-angle: 360deg}}.plan-stats-grid{grid-template-columns:repeat(4,1fr)}@media(max-width:900px){.plan-stats-grid{grid-template-columns:repeat(2,1fr)}.plan-stats-grid .admin-stat-card{padding:var(--space-3)}.plan-stats-grid .admin-stat-value{font-size:1.2rem}.plan-stats-grid .admin-stat-label{font-size:.68rem}.plan-card-grid .card{padding:var(--space-4)}}.vid-options-desktop{display:flex}.vid-options-mobile{display:none}@media(max-width:768px){.vid-options-desktop{display:none!important}.vid-options-mobile{display:flex!important}}.vid-settings-btn{width:36px;height:36px;border-radius:var(--radius-full);background:var(--bg-tertiary);border:1px solid var(--border-primary);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--transition-fast)}.vid-settings-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.vid-sheet-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:flex-end;animation:fadeIn .2s ease}.vid-sheet{width:100%;max-height:80vh;overflow-y:auto;background:var(--bg-elevated);border-radius:var(--radius-xl) var(--radius-xl) 0 0;padding:var(--space-4) var(--space-5) var(--space-6);animation:sheetSlideUp .3s cubic-bezier(.16,1,.3,1)}@keyframes sheetSlideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.vid-sheet-handle{width:36px;height:4px;border-radius:2px;background:var(--border-secondary);margin:0 auto var(--space-4)}.vid-sheet-title{font-size:1rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--space-5);text-align:center}.vid-sheet-section{margin-bottom:var(--space-5)}.vid-sheet-label{font-size:.75rem;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:var(--space-2)}.vid-sheet-chips{display:flex;flex-wrap:wrap;gap:8px}.vid-sheet-chip{display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 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var(--transition-fast)}.vid-sheet-done:hover{opacity:.9}.landing-page{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh;background:var(--bg-primary)}.landing-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-6);gap:var(--space-8)}.landing-brand{display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}.landing-logo{width:56px;height:56px;border-radius:14px}.landing-title{font-size:2rem;font-weight:700;letter-spacing:-.03em;color:var(--text-primary);margin:0}.landing-subtitle{font-size:1.1rem;color:var(--text-secondary);margin:0}.landing-input-wrap{width:100%;max-width:640px}.landing-input-pill{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-3) var(--space-3) var(--space-5);border-radius:var(--radius-full);border:1px solid var(--border-secondary);background:var(--bg-secondary);transition:border-color var(--transition-fast),box-shadow 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var(--border-primary)}.sidebar-guest-text{font-size:.78rem;color:var(--text-tertiary);margin:0 0 var(--space-3);line-height:1.5}.md-math-block{margin:16px 0;padding:16px 20px;background:#6366f10a;border:1px solid rgba(99,102,241,.12);border-radius:10px;overflow-x:auto;text-align:center}.md-math-block .katex-display{margin:0}.md-math-block .katex{font-size:1.15em;color:var(--text-primary)}.md-math-inline{display:inline}.md-math-inline .katex{font-size:1em;color:var(--text-primary)}.md-math-error{color:var(--error);font-family:var(--font-mono);font-size:.85em;background:var(--error-bg);padding:2px 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.2s}.md-task-check.checked{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.md-task-done{text-decoration:line-through;color:var(--text-muted)}.md-details{margin:10px 0;border:1px solid var(--border-primary);border-radius:8px;overflow:hidden}.md-details-summary{width:100%;display:flex;align-items:center;gap:8px;padding:10px 14px;background:#ffffff08;border:none;color:var(--text-primary);font-size:14px;font-weight:500;cursor:pointer;font-family:var(--font-sans);transition:background .2s}.md-details-summary:hover{background:#ffffff0f}.md-details-content{padding:12px 14px;border-top:1px solid var(--border-primary)}.md-highlight{background:#facc1533;color:var(--text-primary);padding:1px 4px;border-radius:3px}.md-link{color:var(--accent-tertiary);text-decoration:underline;text-underline-offset:2px;transition:color 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label{font-size:.85rem;font-weight:500;color:var(--text-secondary)}.admin-auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:var(--bg-primary)}.admin-auth-card{width:100%;max-width:400px;padding:32px;background:var(--bg-elevated);border:1px solid var(--border-primary);border-radius:var(--radius-xl)}.admin-auth-logo{text-align:center;margin-bottom:24px}.admin-auth-logo-text{font-size:1.5rem;font-weight:700}.admin-auth-logo-sub{font-size:.85rem;color:var(--text-tertiary);margin-top:2px}.admin-grid{display:grid;gap:var(--space-5)}.admin-grid-2{grid-template-columns:repeat(2,1fr)}.admin-grid-3{grid-template-columns:repeat(3,1fr)}.admin-grid-4{grid-template-columns:repeat(4,1fr)}.admin-empty{text-align:center;padding:var(--space-12) var(--space-6)}.admin-empty p{color:var(--text-tertiary)}.admin-card{background:var(--bg-tertiary);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:var(--space-6);transition:border-color var(--transition-base)}.admin-card:hover{border-color:var(--border-secondary)}.admin-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-4)}.admin-card-title{font-size:1rem;font-weight:600;color:var(--text-primary)}@media(max-width:1024px){.admin-page-body{padding:var(--space-5);padding-left:64px}.admin-page-header{padding:var(--space-4) 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var(--space-4);padding-left:var(--space-4)}.admin-page-body{padding:var(--space-4)}.admin-grid-4{grid-template-columns:repeat(2,1fr)}.admin-grid-2,.admin-grid-3{grid-template-columns:1fr}}.csel{position:relative;display:inline-flex;min-width:140px;outline:none;font-family:inherit;z-index:50}.csel--disabled{opacity:.5;pointer-events:none}.csel--open{z-index:999}.csel:focus-visible .csel-trigger{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f126}.csel-trigger{display:flex;align-items:center;gap:8px;width:100%;padding:10px 14px;cursor:pointer;-webkit-user-select:none;user-select:none;background:var(--bg-tertiary);border:1px solid var(--border-primary);border-radius:var(--radius-md);color:var(--text-primary);font-size:.88rem;font-weight:500;transition:all .2s ease}.csel-trigger:hover{border-color:var(--accent-primary);background:#6366f108}.csel--open .csel-trigger{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f11f}.csel-icon{display:flex;color:var(--text-tertiary);flex-shrink:0}.csel-value{flex:1;display:flex;align-items:center;gap:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.csel-placeholder{color:var(--text-muted)}.csel-chevron{color:var(--text-tertiary);flex-shrink:0;transition:transform .2s ease}.csel-chevron--open{transform:rotate(180deg)}.csel-dropdown{position:fixed;z-index:99999;background:#151519f2;backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);box-shadow:0 8px 40px #00000080,0 2px 8px #0003,inset 0 1px #ffffff0f;max-height:260px;overflow-y:auto;padding:5px;animation:cselFadeIn .15s ease}@keyframes 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0}.csel-option--disabled{opacity:.4;cursor:not-allowed}.csel-opt-icon{display:flex;flex-shrink:0;width:18px;align-items:center;justify-content:center}.csel-opt-content{flex:1;min-width:0}.csel-opt-label{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.csel-opt-desc{display:block;font-size:.72rem;color:var(--text-tertiary);margin-top:1px}.csel-check{color:var(--accent-primary);flex-shrink:0;margin-left:auto}.csel--sm .csel-trigger{padding:6px 10px;font-size:.8rem;border-radius:var(--radius-sm)}.csel-dropdown--sm{border-radius:var(--radius-md);padding:4px}.csel-dropdown--sm .csel-option{padding:7px 10px;font-size:.8rem;border-radius:var(--radius-sm)}