body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;margin:0;padding:0;background:#0f172a;color:#e2e8f0}.app{display:flex;flex-direction:column;gap:16px;padding:24px;max-width:960px;margin:0 auto}.panel{background:#111827;padding:16px;border-radius:12px;border:1px solid #1f2937}label{display:block;margin-bottom:6px}input{width:100%;padding:10px;border-radius:8px;border:1px solid #1f2937;background:#0b1220;color:#e2e8f0;margin-bottom:10px}button{background:#2563eb;color:#fff;border:none;padding:10px 16px;border-radius:8px;cursor:pointer}.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}video{width:100%;background:#000;border-radius:8px}