:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--bg-color:#f8fafc;--card-bg:#ffffff;--text-color:#1e293b;--text-muted:#64748b;--border-color:#e2e8f0;--success-color:#22c55e;--radius:12px;--shadow:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5;padding:2rem 1rem}.container{max-width:800px;margin:0 auto;background-color:var(--card-bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow)}header{text-align:center;margin-bottom:2.5rem}header h1{font-size:2rem;font-weight:800;color:var(--primary-color);margin-bottom:.5rem}header p{color:var(--text-muted);font-size:1rem}.drop-zone{border:2px dashed var(--border-color);border-radius:var(--radius);padding:3rem 2rem;text-align:center;transition:all .2s ease;cursor:pointer;background-color:#fff}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--primary-color);background-color:#eff6ff}.drop-zone-content svg{margin-bottom:1rem;color:var(--primary-color)}.drop-zone-content p{font-size:1.1rem;color:var(--text-muted)}.drop-zone-content p.highlight{color:var(--primary-color);font-weight:600;text-decoration:underline}.video-section{margin-top:2rem}.video-section.hidden{display:none}.video-wrapper{background:#000;border-radius:var(--radius);overflow:hidden;margin-bottom:1.5rem}.video-wrapper video{width:100%;display:block;max-height:400px}.controls-row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center;margin-bottom:1.5rem;padding:1rem;background:#f1f5f9;border-radius:var(--radius)}.controls-row label{font-weight:600;font-size:.9rem}.time-display{font-size:.85rem;color:var(--text-muted);font-family:monospace;min-width:100px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem 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input[type=range]{width:100px;cursor:pointer}.quality-value{font-size:.85rem;color:var(--text-muted);min-width:35px;text-align:right;font-family:monospace}.auto-options{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center;width:100%;margin-top:.25rem}.auto-options input[type=number]{width:70px;padding:.3rem .5rem;border:1px solid var(--border-color);border-radius:6px;font-size:.85rem}.auto-options .radio-group{display:flex;gap:.75rem;align-items:center}.auto-options .radio-group label{font-weight:400;font-size:.85rem;display:flex;align-items:center;gap:.25rem;cursor:pointer}.results-section{margin-top:2rem}.results-section.hidden{display:none}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-color)}.results-header h2{font-size:1.25rem}.results-header .count-badge{font-size:.85rem;color:var(--text-muted);background:#f1f5f9;padding:.25rem .75rem;border-radius:999px}.thumbnails-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem}.thumbnail-card{border:1px solid var(--border-color);border-radius:var(--radius);overflow:hidden;background:#fff;transition:box-shadow .2s}.thumbnail-card:hover{box-shadow:0 2px 8px rgba(0,0,0,.1)}.thumbnail-card img{width:100%;height:120px;object-fit:cover;display:block;background:#f1f5f9}.thumbnail-card .thumb-info{padding:.6rem .75rem;display:flex;justify-content:space-between;align-items:center;font-size:.8rem}.thumbnail-card .thumb-time{color:var(--text-muted);font-family:monospace}.thumbnail-card .thumb-download{color:var(--primary-color);font-weight:600;text-decoration:none;font-size:.8rem;cursor:pointer}.progress-container{margin-top:1rem;display:none}.progress-container.active{display:block}.progress-bar-bg{width:100%;height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary-color);border-radius:999px;width:0%;transition:width .3s ease}.progress-text{font-size:.85rem;color:#64748b;margin-top:.5rem;text-align:center}.single-preview{margin-top:1rem;padding:1rem;border:1px solid var(--border-color);border-radius:var(--radius);display:none;text-align:center}.single-preview.active{display:block}.single-preview img{max-width:100%;max-height:200px;border-radius:6px;margin-bottom:.75rem}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(20px);background:#1e293b;color:#fff;padding:.75rem 1.5rem;border-radius:8px;font-size:.9rem;opacity:0;transition:all .3s 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