:root{--primary:#007bff;--bg:#f0f2f5;--panel:#fff;--border:#d9dee5;--text:#212529;--muted:#6c757d}body{margin:0;padding:20px;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}.container{max-width:1000px;margin:0 auto;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:24px}.tabs{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}.tab{width:auto;flex:0 0 auto;padding:10px 16px;border:1px solid var(--border);border-radius:8px;background:var(--panel);cursor:pointer;color:var(--text)}.tab.active{background:var(--primary);border-color:var(--primary);color:#fff}.panel{display:none}.panel.active{display:block}.row{display:grid;grid-template-columns:120px 1fr;gap:12px;align-items:center;margin:10px 0}input,button{width:100%;box-sizing:border-box;padding:10px;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--text)}button,.download-link{display:inline-block;background:var(--primary);color:#fff;border:none;text-decoration:none;text-align:center;font-weight:600;cursor:pointer;margin-top:10px;padding:10px 14px;border-radius:8px}.file-list,.frames-grid{display:grid;gap:10px;margin:12px 0}.file-item,.frame-item{padding:10px;border:1px solid var(--border);border-radius:8px;background:rgba(0,0,0,0.02)}.frames-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.frame-item canvas{width:100%;height:auto;border-radius:6px}.preview-img{max-width:100%;display:none;margin-top:14px;border-radius:10px;border:1px solid var(--border)}.download-link{display:none}.dark-mode{--primary:#3d8bfd;--bg:#1e2128;--panel:#2a2e37;--border:#4a505f;--text:#e5e7eb;--muted:#9ca3af}.dark-mode .file-item,.dark-mode .frame-item{background:rgba(255,255,255,0.03)}@media(max-width:700px){body{padding:10px}.container{padding:16px}.row{grid-template-columns:1fr}}

.desc{color:var(--muted);margin:0 0 12px;font-size:14px;line-height:1.7}
.video-preview{width:100%;max-width:100%;margin-top:14px;border-radius:10px;border:1px solid var(--border);background:#000}
.status-text{margin-top:10px;color:var(--muted);font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-word}

.video-tip{margin-top:8px;color:var(--muted);font-size:12px;line-height:1.7}