:root{--primary: #667eea;--primary-dark: #5568d3;--secondary: #764ba2;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--dark: #0f172a;--dark-light: #1e293b;--dark-lighter: #334155;--text: #f1f5f9;--text-muted: #94a3b8;--border: #334155;--gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);--shadow: 0 20px 25px -5px rgba(0, 0, 0, .3), 0 10px 10px -5px rgba(0, 0, 0, .2);--shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--dark);color:var(--text);line-height:1.6;min-height:100vh;background-image:radial-gradient(at 0% 0%,rgba(102,126,234,.1) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(118,75,162,.1) 0px,transparent 50%)}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.header{background:#0f172acc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.header-content{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 0}.logo{display:flex;align-items:center;gap:.75rem}.logo-text{font-size:1.25rem;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav{display:flex;gap:2rem}.nav-link{color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .3s ease;position:relative}.nav-link:hover,.nav-link.active{color:var(--text)}.nav-link.active:after{content:"";position:absolute;bottom:-.5rem;left:0;right:0;height:2px;background:var(--gradient)}.hero-section{padding:4rem 0 3rem;text-align:center}.hero-title{font-size:3.5rem;font-weight:800;line-height:1.2;margin-bottom:1.5rem}.gradient-text{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--text-muted);max-width:600px;margin:0 auto}.upload-section{padding:2rem 0 4rem}.upload-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:2rem;margin-bottom:3rem}.upload-card{background:#1e293b80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border);border-radius:1.5rem;padding:2rem;transition:all .3s ease}.upload-card:hover{border-color:var(--primary);box-shadow:0 0 30px #667eea33;transform:translateY(-2px)}.upload-icon{width:64px;height:64px;background:var(--gradient);border-radius:1rem;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;color:#fff}.upload-title{font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.upload-description{color:var(--text-muted);margin-bottom:1.5rem}.drop-zone{border:2px dashed var(--border);border-radius:1rem;padding:3rem 2rem;text-align:center;transition:all .3s ease;cursor:pointer}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--primary);background:#667eea0d}.drop-text{font-size:1.125rem;font-weight:600;margin-bottom:.5rem}.drop-or{color:var(--text-muted);margin:1rem 0}.btn-browse{background:var(--gradient);color:#fff;border:none;padding:.75rem 2rem;border-radius:.75rem;font-weight:600;font-size:1rem;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d}.btn-browse:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.file-info{font-size:.875rem;color:var(--text-muted);margin-top:1rem}.file-preview{margin-top:1.5rem}.preview-content video{width:100%;border-radius:.75rem;margin-bottom:1rem;background:#000}.file-details{display:flex;justify-content:space-between;align-items:center}.file-name{font-weight:500;color:var(--text)}.btn-remove{background:var(--danger);color:#fff;border:none;padding:.5rem 1rem;border-radius:.5rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-remove:hover{background:#dc2626;transform:scale(1.05)}.action-section{text-align:center;margin:3rem 0}.btn-process{background:var(--gradient);color:#fff;border:none;padding:1rem 3rem;border-radius:1rem;font-weight:700;font-size:1.125rem;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow);display:inline-flex;align-items:center;gap:.75rem}.btn-process:not(:disabled):hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}.btn-process:disabled{opacity:.5;cursor:not-allowed}.btn-icon{transition:transform .3s ease}.btn-process:hover .btn-icon{transform:translate(4px)}.action-hint{color:var(--text-muted);margin-top:1rem;font-size:.875rem}.progress-section{margin:3rem 0}.progress-card{background:#1e293b80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border);border-radius:1.5rem;padding:2.5rem;box-shadow:var(--shadow)}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.progress-title{font-size:1.5rem;font-weight:700}.progress-status{color:var(--primary);font-weight:600;padding:.5rem 1rem;background:#667eea1a;border-radius:.5rem}.progress-bar-container{background:var(--dark-lighter);height:12px;border-radius:1rem;overflow:hidden;margin-bottom:1rem}.progress-bar{height:100%;background:var(--gradient);width:0%;transition:width .5s ease;border-radius:1rem}.progress-text{text-align:center;font-size:1.5rem;font-weight:700;color:var(--primary)}.progress-info{margin-top:1rem;text-align:center;color:var(--text-muted)}.results-section{margin:3rem 0}.results-card{background:#1e293b80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border);border-radius:1.5rem;padding:2.5rem;box-shadow:var(--shadow)}.results-header{text-align:center;margin-bottom:2rem}.success-icon{width:80px;height:80px;background:#10b9811a;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem;color:var(--success)}.results-title{font-size:2rem;font-weight:700;margin-bottom:.5rem}.results-subtitle{color:var(--text-muted);font-size:1.125rem}.segments-list{display:grid;gap:1rem}.segment-item{background:#3341554d;border:1px solid var(--border);border-radius:1rem;padding:1.5rem;display:flex;justify-content:space-between;align-items:center;transition:all .3s ease}.segment-item:hover{border-color:var(--primary);background:#667eea0d}.segment-info{display:flex;align-items:center;gap:1rem}.segment-number{width:48px;height:48px;background:var(--gradient);border-radius:.75rem;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.125rem}.segment-name{font-weight:600}.btn-download{background:var(--primary);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:.75rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.btn-download:hover{background:var(--primary-dark);transform:translateY(-2px)}.footer{background:#0f172acc;border-top:1px solid var(--border);padding:2rem 0;text-align:center;color:var(--text-muted);margin-top:auto}@media(max-width:768px){.hero-title{font-size:2.5rem}.upload-grid{grid-template-columns:1fr}.header-content{flex-direction:column;gap:1rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.upload-card,.progress-card,.results-card{animation:fadeIn .6s ease}