*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #6366f1;--primary-dark: #4f46e5;--secondary-color: #64748b;--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--background-color: #0f172a;--surface-color: #1e293b;--surface-light: #334155;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--border-color: #334155;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--border-radius: 8px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,var(--background-color) 0%,#1e1b4b 100%);color:var(--text-primary);line-height:1.6;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.header{background:#1e293bf2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100}.header-content{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}.logo{display:flex;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:700;color:var(--primary-color)}.logo i{font-size:2rem}.nav{display:flex;gap:.5rem}.nav-btn{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;background:transparent;border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);cursor:pointer;transition:var(--transition);font-size:.875rem;font-weight:500}.nav-btn:hover{background:var(--surface-color);color:var(--text-primary);border-color:var(--primary-color)}.nav-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.main{padding:2rem 0;min-height:calc(100vh - 200px)}.player-section{background:var(--surface-color);border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow-lg);margin-bottom:2rem}.video-container{position:relative;width:100%;aspect-ratio:16/9;background:#000}#videoPlayer{width:100%;height:100%;object-fit:contain}.video-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;background:#000000b3;z-index:10}.loading-spinner{display:flex;flex-direction:column;align-items:center;gap:1rem;color:var(--text-primary)}.loading-spinner i{font-size:2rem;color:var(--primary-color)}.error-message{display:flex;flex-direction:column;align-items:center;gap:1rem;color:var(--error-color)}.error-message i{font-size:2rem}.player-controls{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--surface-light);border-top:1px solid var(--border-color)}.control-group{display:flex;align-items:center;gap:.5rem}.control-btn{width:40px;height:40px;border:none;border-radius:50%;background:var(--surface-color);color:var(--text-primary);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center}.control-btn:hover{background:var(--primary-color);color:#fff}.volume-slider{width:100px}.volume-slider input[type=range]{width:100%;height:4px;border-radius:2px;background:var(--border-color);outline:none;-webkit-appearance:none}.volume-slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--primary-color);cursor:pointer}.progress-container{flex:1;display:flex;align-items:center;gap:1rem}.progress-bar{flex:1;height:6px;background:var(--border-color);border-radius:3px;position:relative;cursor:pointer}.progress-fill{height:100%;background:var(--primary-color);border-radius:3px;width:0%;transition:width .1s ease}.progress-handle{position:absolute;top:50%;left:0%;width:16px;height:16px;background:var(--primary-color);border-radius:50%;transform:translate(-50%,-50%);opacity:0;transition:var(--transition)}.progress-bar:hover .progress-handle{opacity:1}.time-display{color:var(--text-secondary);font-size:.875rem;font-variant-numeric:tabular-nums;white-space:nowrap}.tab-content{background:var(--surface-color);border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow)}.tab-panel{display:none;padding:2rem}.tab-panel.active{display:block}.playlist-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.playlist-header h2{font-size:1.5rem;font-weight:600;color:var(--text-primary)}.playlist-actions{display:flex;gap:.75rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:var(--border-radius);font-size:.875rem;font-weight:500;cursor:pointer;transition:var(--transition);text-decoration:none}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--surface-light);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--border-color)}.playlist-container{max-height:500px;overflow-y:auto}.playlist-list{display:flex;flex-direction:column;gap:.5rem}.playlist-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--surface-light);border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);border:1px solid transparent}.playlist-item:hover{background:var(--border-color);border-color:var(--primary-color)}.playlist-item.active{background:#6366f11a;border-color:var(--primary-color)}.playlist-item-info{flex:1;min-width:0}.playlist-item-title{font-weight:500;color:var(--text-primary);margin-bottom:.25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.playlist-item-url{font-size:.875rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.playlist-item-source{font-size:.75rem;color:var(--primary-color);margin-top:.25rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.playlist-item-actions{display:flex;gap:.5rem}.playlist-item-btn{width:32px;height:32px;border:none;border-radius:50%;background:var(--surface-color);color:var(--text-secondary);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center}.playlist-item-btn:hover{background:var(--primary-color);color:#fff}.upload-section h2{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:1.5rem}.upload-area{border:2px dashed var(--border-color);border-radius:var(--border-radius);padding:3rem;text-align:center;transition:var(--transition);cursor:pointer;position:relative}.upload-area:hover,.upload-area.dragover{border-color:var(--primary-color);background:#6366f10d}.upload-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-content i{font-size:3rem;color:var(--primary-color)}.upload-content p{color:var(--text-secondary);font-size:1.125rem}#fileInput{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.settings-section h2{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:1.5rem}.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.setting-item{display:flex;align-items:center;justify-content:space-between;padding:1rem;background:var(--surface-light);border-radius:var(--border-radius)}.setting-item label{font-weight:500;color:var(--text-primary)}.setting-item input[type=checkbox]{width:20px;height:20px;accent-color:var(--primary-color)}.setting-item input[type=range]{width:100px;margin-right:.5rem}.setting-item select{padding:.5rem;border:1px solid var(--border-color);border-radius:var(--border-radius);background:var(--surface-color);color:var(--text-primary);min-width:100px}.footer{background:var(--surface-color);border-top:1px solid var(--border-color);padding:1.5rem 0;margin-top:2rem}.footer p{text-align:center;color:var(--text-muted);font-size:.875rem}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem}.nav{width:100%;justify-content:center}.nav-btn{flex:1;justify-content:center}.player-controls{flex-wrap:wrap;gap:.5rem}.progress-container{order:-1;width:100%}.playlist-header{flex-direction:column;align-items:flex-start;gap:1rem}.playlist-actions{width:100%;justify-content:center}.settings-grid{grid-template-columns:1fr}.setting-item{flex-direction:column;align-items:flex-start;gap:.5rem}}@media (max-width: 480px){.container{padding:0 .5rem}.main{padding:1rem 0}.tab-panel{padding:1rem}.upload-area{padding:2rem 1rem}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--surface-color)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.tab-panel.active{animation:fadeIn .3s ease-out}.tooltip{position:relative}.tooltip:after{content:attr(data-tooltip);position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:var(--surface-color);color:var(--text-primary);padding:.5rem;border-radius:var(--border-radius);font-size:.75rem;white-space:nowrap;opacity:0;pointer-events:none;transition:var(--transition);z-index:1000}.tooltip:hover:after{opacity:1}