:root{--bg-color: #0f172a;--bg-darker: #020617;--surface-color: #1e293b;--surface-hover: #334155;--border-color: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--primary-color: #8b5cf6;--primary-hover: #7c3aed;--primary-glow: rgba(139, 92, 246, .2);--danger-color: #ef4444;--success-color: #10b981;--radius-lg: 16px;--radius-md: 10px;--radius-sm: 6px;--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .5), 0 4px 6px -4px rgb(0 0 0 / .5);--header-height: 64px;--sidebar-width: 320px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;line-height:1.5;color:var(--text-primary);background-color:var(--bg-darker);-webkit-font-smoothing:antialiased}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;overflow:hidden}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surface-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--surface-hover)}button,input{font-family:inherit;transition:all .2s cubic-bezier(.4,0,.2,1)}button{cursor:pointer;border:none;background:var(--surface-color);color:var(--text-primary);border-radius:var(--radius-md);padding:10px 20px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:8px}button:hover:not(:disabled){background:var(--surface-hover);transform:translateY(-1px)}button:active:not(:disabled){transform:translateY(0)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--primary-color);box-shadow:0 4px 14px 0 var(--primary-glow)}button.primary:hover:not(:disabled){background:var(--primary-hover);box-shadow:0 6px 20px 0 var(--primary-glow)}button.icon-btn{padding:8px;background:transparent;color:var(--text-secondary)}button.icon-btn:hover{background:var(--surface-color);color:var(--text-primary)}input{background:var(--bg-color);border:1px solid var(--border-color);color:var(--text-primary);border-radius:var(--radius-md);padding:10px 14px;outline:none}input:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px var(--primary-glow)}.page{height:100vh;display:flex;flex-direction:column}.app-header{height:var(--header-height);padding:0 24px;display:flex;align-items:center;justify-content:space-between;background:var(--bg-color);border-bottom:1px solid var(--border-color);z-index:100}.brand{display:flex;align-items:center;gap:12px}.brand h1{font-size:20px;font-weight:800;background:linear-gradient(135deg,#a78bfa,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.room-controls{display:flex;align-items:center;gap:16px}.room-input-group{display:flex;align-items:center;background:var(--bg-darker);border-radius:var(--radius-md);padding:2px 4px;border:1px solid var(--border-color)}.room-input-group span{font-size:12px;font-weight:600;color:var(--text-muted);padding:0 8px}.room-input-group input{background:transparent;border:none;padding:6px;width:120px;font-size:13px;font-weight:600}.room-input-group input:focus{box-shadow:none}.connection-badge{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:4px 10px;border-radius:99px;display:flex;align-items:center;gap:6px;background:#94a3b81a;color:var(--text-secondary)}.connection-badge.online{color:var(--success-color);background:#10b9811a}.connection-badge.offline{color:var(--danger-color);background:#ef44441a}.dot{width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 8px currentColor}.workspace{flex:1;display:flex;overflow:hidden;position:relative}.player-main{flex:1;display:flex;flex-direction:column;background:var(--bg-darker);padding:24px;overflow-y:auto}.player-card{width:100%;max-width:1280px;margin:0 auto;display:flex;flex-direction:column;gap:20px}.video-container{width:100%;aspect-ratio:16 / 9;background:#000;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 25px 50px -12px #00000080;position:relative;border:1px solid var(--border-color);-webkit-user-select:none;user-select:none}.video-container:fullscreen{border-radius:0;border:none;aspect-ratio:auto}.video-container:-webkit-full-screen{border-radius:0;border:none;aspect-ratio:auto}.video-player{width:100%;height:100%;cursor:pointer}.video-controls{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,#000c);padding:20px;display:flex;flex-direction:column;gap:12px;opacity:0;transition:opacity .3s ease;z-index:20}.video-container:hover .video-controls,.video-container.controls-visible .video-controls{opacity:1}.control-row{display:flex;align-items:center;gap:16px}.progress-area{width:100%;height:6px;background:#fff3;border-radius:99px;cursor:pointer;position:relative;transition:height .1s}.progress-area:hover{height:8px}.progress-filled{height:100%;background:var(--primary-color);border-radius:99px;position:relative}.progress-handle{position:absolute;right:-6px;top:50%;transform:translateY(-50%);width:12px;height:12px;background:#fff;border-radius:50%;box-shadow:0 0 10px #00000080;opacity:0;transition:opacity .1s}.progress-area:hover .progress-handle{opacity:1}.control-btn{background:transparent;padding:6px;border-radius:6px;color:#fff}.control-btn:hover{background:#ffffff1a}.time-display{font-size:13px;font-variant-numeric:tabular-nums;color:#fff;font-weight:500}.volume-group{display:flex;align-items:center;gap:8px;margin-left:auto}.volume-slider{width:80px;height:4px;appearance:none;background:#fff3;border-radius:2px;outline:none}.volume-slider::-webkit-slider-thumb{appearance:none;width:10px;height:10px;background:#fff;border-radius:50%;cursor:pointer}.video-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted)}.video-placeholder svg{width:64px;height:64px;opacity:.2}.player-info{display:flex;justify-content:space-between;align-items:flex-start;padding:0 4px}.video-title h2{font-size:24px;font-weight:700;margin-bottom:4px}.sync-status{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary)}.app-sidebar{width:var(--sidebar-width);background:var(--bg-color);border-left:1px solid var(--border-color);display:flex;flex-direction:column;transition:all .3s ease;z-index:50}.app-sidebar.collapsed{width:0;border-left-width:0}.sidebar-header{padding:20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-color)}.sidebar-header h3{font-size:16px;font-weight:700}.video-list{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px}.video-item{padding:12px;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;display:flex;flex-direction:column;gap:8px;transition:all .2s;background:var(--surface-color)}.video-item:hover{background:var(--surface-hover);border-color:var(--border-color)}.video-item.active{background:#8b5cf61a;border-color:var(--primary-color)}.video-item-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.video-item-top strong{font-size:14px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.delete-btn{padding:4px;background:transparent;color:var(--text-muted);border-radius:4px}.delete-btn:hover{background:#ef44441a;color:var(--danger-color)}.video-item-meta{display:flex;align-items:center;gap:12px;font-size:11px;color:var(--text-muted);font-weight:500}.modal-overlay{position:fixed;inset:0;background:#000c;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}.modal-content{background:var(--bg-color);width:100%;max-width:500px;border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;animation:modalIn .3s cubic-bezier(.34,1.56,.64,1)}@keyframes modalIn{0%{opacity:0;transform:scale(.9) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.modal-body{padding:24px;display:flex;flex-direction:column;gap:20px}.upload-form{display:flex;flex-direction:column;gap:16px}.input-group{display:flex;flex-direction:column;gap:8px}.input-group label{font-size:13px;font-weight:600;color:var(--text-secondary)}.file-dropzone{border:2px dashed var(--border-color);border-radius:var(--radius-md);padding:40px 20px;text-align:center;cursor:pointer;transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:12px}.file-dropzone:hover{border-color:var(--primary-color);background:#8b5cf60d}.file-dropzone.has-file{border-style:solid;border-color:var(--primary-color);background:#8b5cf61a}.file-dropzone svg{width:40px;height:40px;color:var(--text-muted)}.file-dropzone span{font-size:14px;font-weight:500}.progress-container{width:100%;height:8px;background:var(--surface-color);border-radius:99px;overflow:hidden}.progress-bar{height:100%;background:var(--primary-color);transition:width .3s ease}.error-message{padding:12px;background:#ef44441a;border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-md);color:var(--danger-color);font-size:13px;font-weight:500}.speed-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#000c;padding:16px 24px;border-radius:99px;display:flex;align-items:center;gap:12px;font-weight:700;color:#fff;pointer-events:none;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,.1)}.sidebar-toggle{position:absolute;right:20px;bottom:20px;z-index:60;width:48px;height:48px;border-radius:50%;background:var(--primary-color);color:#fff;box-shadow:var(--shadow-lg)}@media(max-width:1024px){.app-sidebar{position:absolute;right:0;top:0;bottom:0;width:320px;box-shadow:-10px 0 30px #00000080}}@media(max-width:768px){.app-header{height:auto;padding:12px 16px;flex-direction:column;gap:12px}.room-controls{width:100%;justify-content:space-between}.player-main{padding:12px}.video-title h2{font-size:18px}}