:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark light;color:#ffffffde;background-color:#0f172a;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--primary: #6366f1;--secondary: #ec4899;--accent: #06b6d4;--bg: #0f172a;--card-bg: rgba(30, 41, 59, .7);--text-main: #f8fafc;--text-muted: #94a3b8}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;overflow-x:hidden}a{font-weight:500;color:var(--primary);text-decoration:inherit}a:hover{color:var(--secondary)}h1,h2,h3{color:var(--text-main);line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:var(--primary);color:#fff;cursor:pointer;transition:all .25s}button:hover{background-color:#4f46e5;box-shadow:0 0 15px #6366f180;transform:translateY(-2px)}button:active{transform:translateY(0)}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff;--bg: #ffffff;--card-bg: rgba(241, 245, 249, .7);--text-main: #0f172a;--text-muted: #64748b}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app-container{min-height:100vh;display:flex;flex-direction:column}.navbar{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 5%;position:sticky;top:0;background:#0f172acc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100}.logo-text{font-size:1.5rem;font-weight:800;background:linear-gradient(to right,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;gap:2rem}.hero{padding:60px 5% 40px;text-align:center;max-width:1000px;margin:0 auto}.hero h1{font-size:3.5rem;margin-bottom:1rem}.analysis-section{padding:40px 5%;max-width:900px;margin:0 auto;width:100%}.analysis-card{background:var(--card-bg);border-radius:24px;padding:3rem;border:1px solid rgba(255,255,255,.1);box-shadow:0 25px 50px -12px #00000080}.card-header{text-align:center;margin-bottom:2.5rem}.header-icon{color:var(--primary);margin-bottom:1rem;width:48px;height:48px}.upload-zone{border:2px dashed rgba(255,255,255,.1);border-radius:16px;padding:3rem;text-align:center;cursor:pointer;transition:all .3s;background:#ffffff05}.upload-zone:hover{border-color:var(--primary);background:#6366f10d}.upload-icon{color:var(--text-muted);margin-bottom:1rem}.divider{display:flex;align-items:center;margin:2rem 0;color:var(--text-muted);font-size:.8rem}.divider:before,.divider:after{content:"";flex:1;height:1px;background:#ffffff1a}.divider span{padding:0 1rem}.url-input-group{position:relative;margin-bottom:2rem}.yt-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:#ef4444}.url-input-group input{width:100%;background:#0003;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:1rem 1rem 1rem 3rem;color:#fff;font-size:1rem}.full-width{width:100%;padding:1rem}.processing-container{text-align:center;padding:2rem 0}.spinner{color:var(--primary);animation:spin 2s linear infinite;margin-bottom:2rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.status-steps{text-align:left;max-width:300px;margin:0 auto}.step{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;color:var(--text-muted);font-size:.9rem}.step.active{color:var(--text-main)}.step .dot{width:8px;height:8px;border-radius:50%;background:#fff3}.step.active .dot{background:var(--primary);box-shadow:0 0 10px var(--primary)}.viewer-container{background:#000;border-radius:20px;overflow:hidden;border:1px solid rgba(255,255,255,.1)}.viewer-header{padding:1rem 1.5rem;background:#111;display:flex;justify-content:space-between;align-items:center}.canvas-wrapper{background:radial-gradient(circle at center,#1e293b,#0f172a)}.viewer-footer{padding:1rem 1.5rem;background:#111;display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--text-muted)}.legend{display:flex;gap:1.5rem}.legend-item{display:flex;align-items:center;gap:.5rem}.dot{width:10px;height:10px;border-radius:50%}.badge{background:#6366f133;color:var(--primary);padding:2px 8px;border-radius:12px;font-size:.75rem;font-weight:700;display:flex;align-items:center}.icon-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:5px}.icon-btn:hover{color:#fff}.timeline-container{background:var(--card-bg);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:1rem;margin-top:1rem}.timeline-controls{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.play-btn{color:var(--primary)}.time-display{font-family:monospace;font-size:.9rem;color:var(--text-muted)}.timeline-track-area{position:relative;height:60px;background:#0000004d;border-radius:8px;overflow:hidden}.waveform-container{display:flex;align-items:center;height:100%;width:100%;padding:0 2px;gap:2px;opacity:.5}.waveform-bar{flex:1;background:var(--primary);border-radius:2px}.timeline-scrubber{position:absolute;top:0;left:0;width:100%;height:100%;cursor:pointer}.timeline-progress{position:absolute;top:0;left:0;height:100%;background:#6366f133;pointer-events:none}.timeline-handle{position:absolute;top:0;height:100%;width:2px;background:#fff;box-shadow:0 0 10px #fff;cursor:ew-resize;z-index:10}.timeline-handle:after{content:"";position:absolute;top:0;left:-4px;width:10px;height:10px;background:#fff;border-radius:50%}.keyframe-markers{position:absolute;bottom:0;left:0;width:100%;height:10px;pointer-events:none}.keyframe{position:absolute;bottom:0;width:8px;height:8px;background:var(--secondary);border-radius:50%;transform:translate(-50%)}footer{padding:40px 5%;text-align:center;color:var(--text-muted)}