*{box-sizing:border-box;margin:0;padding:0}body{background:#0f0f0f;color:#e0e0e0;font-family:system-ui,-apple-system,sans-serif;min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:40px 16px}.container{width:100%;max-width:680px}h1{font-size:1.6rem;font-weight:700;color:#fff}.input-row{display:flex;gap:10px}input[type=text]{flex:1 1;background:#1e1e1e;border:1px solid #333;border-radius:8px;color:#e0e0e0;font-size:.95rem;padding:10px 14px;outline:none;transition:border-color .2s}input[type=text]:focus{border-color:#f44}button{background:#f44;border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:.95rem;font-weight:600;padding:10px 20px;transition:background .2s;white-space:nowrap}button:hover{background:#e03333}button:disabled{background:#555;cursor:not-allowed}.error{color:#ff6b6b;font-size:.88rem;margin-top:10px}.preview-card{display:flex;gap:16px;background:#1e1e1e;border-radius:10px;margin-top:24px;overflow:hidden;padding:16px;align-items:flex-start}#thumbnail{border-radius:6px;flex-shrink:0;height:auto;object-fit:cover;width:160px}.preview-details{display:flex;flex-direction:column;gap:10px;flex:1 1}#video-title{font-size:1rem;font-weight:600;color:#fff;line-height:1.3}#video-duration{color:#888;font-size:.85rem}.quality-row{display:flex;align-items:center;gap:10px}.quality-row label{font-size:.9rem;color:#aaa}select{background:#2a2a2a;border:1px solid #444;border-radius:6px;color:#e0e0e0;font-size:.9rem;padding:6px 10px;outline:none;cursor:pointer}#section-progress{margin-top:24px;background:#1e1e1e;border-radius:10px;padding:20px}#progress-label{font-size:.9rem;color:#aaa;margin-bottom:12px}.progress-bar-track{background:#333;border-radius:100px;height:8px;overflow:hidden;width:100%}.progress-bar-fill{background:#f44;border-radius:100px;height:100%;transition:width .3s ease;width:0}.progress-stats{display:flex;gap:20px;margin-top:10px;font-size:.85rem;color:#888}#progress-percent{color:#fff;font-weight:600}#section-done{margin-top:24px;background:#1a2e1a;border:1px solid #2d5a2d;border-radius:10px;padding:20px;text-align:center}.done-msg{color:#4caf50;font-size:1.1rem;font-weight:600;margin-bottom:8px}#done-filename{color:#888;font-size:.85rem;font-family:monospace;margin-bottom:16px;word-break:break-all}.progress-section{display:flex;flex-direction:column;align-items:center;gap:16px;margin-top:28px}.circular-progress-wrapper{position:relative;width:140px;height:140px;display:flex;align-items:center;justify-content:center}.circle-track{fill:none;stroke:#2a2a2a;stroke-width:10}.circle-fill{fill:none;stroke:#f44;stroke-width:10;stroke-linecap:round;transition:stroke-dashoffset .4s ease}.circular-percent{position:absolute;font-size:1.3rem;font-weight:700;color:#fff}.btn-download-ready{width:100%;max-width:300px;padding:14px 20px;font-size:1rem}.btn-again-small{background:transparent;border:1px solid #444;color:#888;font-size:.85rem;padding:8px 16px}.btn-again-small:hover{background:#1e1e1e;color:#e0e0e0}