:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#111;background:#fafafa}main{min-height:100vh;display:flex;align-items:center;justify-content:center}.card,main{padding:24px}.card{width:100%;max-width:520px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 8px 24px rgba(15,23,42,.08)}.card h1{margin:0 0 12px;font-size:28px}.card p{margin:0;color:#475569}.form{margin-top:20px;display:grid;grid-gap:12px;gap:12px}.form label{font-size:14px;font-weight:600;color:#0f172a}.form input{padding:10px 12px;border:1px solid #cbd5e1;border-radius:8px;font-size:16px}.form button{padding:10px 14px;border:none;border-radius:999px;background:#2563eb;color:#fff;font-weight:600;cursor:pointer}.form button:disabled{opacity:.6;cursor:not-allowed}.error{margin:0;color:#b91c1c;font-size:14px}.muted{margin:0 0 12px;color:#64748b}