.thumbnail-settings{display:flex;flex-direction:column;gap:1.5rem}.file-info{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:var(--bg-secondary);border-radius:8px}.file-name{font-weight:500;word-break:break-all}.file-size{color:var(--text-secondary);white-space:nowrap;margin-left:1rem}.video-preview{width:100%;max-height:300px;border-radius:8px;background:var(--color-bg-primary, #000)}.mode-selector{display:flex;gap:.5rem;flex-wrap:wrap}.mode-btn{flex:1;min-width:150px;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:8px;background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;transition:all .2s;font-size:.9rem}.mode-btn:hover{border-color:var(--accent-color)}.mode-btn.active{border-color:var(--accent-color);background:rgba(var(--accent-rgb, 99, 102, 241),.1)}.setting-group{display:flex;flex-direction:column;gap:.5rem}.setting-group label{font-weight:500;font-size:.9rem;color:var(--text-secondary)}.setting-group select{padding:.75rem;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-secondary);color:var(--text-primary);font-size:.9rem}.time-slider{width:100%;height:6px;-webkit-appearance:none;appearance:none;background:var(--bg-tertiary);border-radius:3px}.time-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent-color);cursor:pointer}.extract-btn{width:100%;padding:1rem;font-size:1.1rem}.processing-status{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:2rem}.progress-bar{width:100%;height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-color),#8b5cf6);transition:width .3s ease}.progress-text{color:var(--text-secondary)}.error-message{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:2rem;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:8px;color:var(--color-error)}.frames-result{display:flex;flex-direction:column;gap:1.5rem}.frames-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}.frames-header h4{margin:0}.select-hint{font-size:.85rem;color:var(--text-secondary)}.frames-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem}.frame-item{position:relative;border-radius:8px;overflow:hidden;cursor:pointer;border:3px solid transparent;transition:all .2s}.frame-item:hover{transform:scale(1.02)}.frame-item.selected{border-color:var(--accent-color)}.frame-item img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.frame-info{position:absolute;bottom:0;left:0;right:0;padding:.5rem;background:linear-gradient(transparent,#000c);display:flex;justify-content:space-between;align-items:center}.frame-time{color:#fff;font-size:.8rem;font-family:Menlo,monospace}.check-mark{color:var(--accent-color);font-weight:700;font-size:1.2rem}.action-buttons{display:flex;gap:1rem;flex-wrap:wrap}.social-presets{background:var(--bg-secondary);border-radius:12px;padding:1.25rem;margin-bottom:1rem}.social-presets h4{margin:0 0 .75rem;font-size:1rem}.preset-tags{display:flex;flex-wrap:wrap;gap:.5rem}.preset-tag{padding:.4rem .8rem;background:var(--bg-tertiary);border-radius:20px;font-size:.85rem;color:var(--text-secondary)}.privacy-note{margin-top:2rem;padding:1rem;background:var(--bg-secondary);border-radius:8px;text-align:center;font-size:.9rem;color:var(--text-secondary)}