:root{color-scheme:light}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:24px 12px;background:#f8fafc;color:#1e293b;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
.tarjeta{width:100%;max-width:520px;background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:24px}
h1{font-size:20px;margin:0 0 6px}
.ayuda,.pie{font-size:13px;color:#64748b;margin:0 0 16px}
.pie{margin:20px 0 0}
label{display:block;font-size:13px;font-weight:600;margin-bottom:12px}
input,select{display:block;width:100%;margin-top:4px;padding:10px;font-size:15px;border:1px solid #cbd5e1;border-radius:8px;background:#fff}
button{width:100%;padding:12px;font-size:15px;font-weight:600;color:#fff;background:#3b82f6;border:0;border-radius:8px;cursor:pointer}
button[disabled]{opacity:.6;cursor:wait}
.oculto{display:none}
#resultado{margin-top:16px;padding:16px;border-radius:12px;font-size:14px}
#resultado.ok{background:rgba(34,197,94,.12);border:1px solid #22c55e}
#resultado.error{background:rgba(239,68,68,.12);border:1px solid #ef4444}
#resultado dl{margin:8px 0 12px;display:grid;grid-template-columns:auto 1fr;gap:4px 12px}
#resultado dt{color:#64748b}
#resultado dd{margin:0;font-weight:600}
a{color:#3b82f6}