*{box-sizing:border-box}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#0f0f0f;color:#fff;margin:0;padding:0;min-height:100vh;display:flex;align-items:center;justify-content:center}#app{width:100%;max-width:620px;padding:2rem}.container{background:#1a1a1a;border-radius:16px;padding:2.5rem;box-shadow:0 10px 30px #00000080}h1{margin:0 0 .5rem;font-size:2rem;text-align:center}.subtitle{text-align:center;color:#888;margin-bottom:2rem}.input-group{margin-bottom:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:500;color:#ccc}input[type=text]{width:100%;padding:14px 16px;border:2px solid #333;border-radius:10px;background:#111;color:#fff;font-size:1rem;outline:none;transition:border .2s}input[type=text]:focus{border-color:red}.format-selector{display:flex;gap:1rem;margin-bottom:1.5rem}.format-btn{flex:1;padding:14px;border:2px solid #333;border-radius:10px;background:#111;color:#fff;font-size:1rem;cursor:pointer;transition:all .2s}.format-btn.active{border-color:red;background:#2a0000}.download-btn{width:100%;padding:16px;font-size:1.1rem;font-weight:600;border:none;border-radius:10px;background:red;color:#fff;cursor:pointer;transition:background .2s}.download-btn:hover:not(:disabled){background:#c00}.download-btn:disabled{opacity:.6;cursor:not-allowed}.status{margin-top:1rem;padding:12px;border-radius:8px;text-align:center;font-size:.95rem}.status.success{background:#1a3c1a;color:#4ade80}.status.error{background:#3c1a1a;color:#f87171}.status.loading{background:#1a2a3c;color:#60a5fa}