/* Colores fijos: evita que navegadores con "modo oscuro forzado" (Opera, Chrome) los alteren. */
:root{color-scheme:only light}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:"Segoe UI",Arial,sans-serif;color:#1d2433;
  background:linear-gradient(160deg,#16357a 0%,#1e4fa0 55%,#2c66c4 100%);
  display:flex;align-items:center;justify-content:center;padding:16px}
.card{width:100%;max-width:400px;background:#fff;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.25);padding:24px 28px}
.card.ancha{max-width:520px}
.logo{display:block;width:220px;max-width:80%;margin:0 auto 6px}
.logo.chico{width:160px}
h1{font-size:18px;font-weight:600;text-align:center;margin:4px 0 2px}
.sub{font-size:13px;color:#5a6475;text-align:center;margin:0 0 18px}
label{display:block;font-size:13px;font-weight:600;margin:12px 0 4px}
input[type=text],input[type=password]{width:100%;height:40px;border:1px solid #b9c2d0;border-radius:6px;padding:0 12px;font-size:15px;color:#1d2433}
input:focus{outline:2px solid #2c66c4;outline-offset:0;border-color:#2c66c4}
input.codigo{height:54px;font-size:28px;font-weight:600;letter-spacing:.35em;text-align:center;font-family:Consolas,"Courier New",monospace}
button{margin-top:18px;width:100%;height:42px;border:0;border-radius:6px;background:#1e4fa0;color:#fff;font-weight:600;font-size:15px;cursor:pointer}
button:hover{background:#16357a}
.pie{font-size:11.5px;color:#8a93a3;text-align:center;margin:14px 0 0}
.aviso{border-radius:6px;padding:10px 12px;font-size:13px;margin:0 0 8px;line-height:1.45}
.aviso.amarillo{background:#fff6dc;border:1px solid #f0d58a;color:#7a5a00}
.aviso.rojo{background:#fdecec;border:1px solid #f1b5b5;color:#9b1c1c}
.nota{font-size:12.5px;color:#5a6475;line-height:1.55;margin-top:12px}
.fila{display:flex;gap:18px;align-items:flex-start}
.fila img.qr{width:160px;height:160px;flex:none;border:1px solid #e3e7ee;border-radius:6px}
.pasos{font-size:13px;color:#33405a;margin:0;padding-left:18px;line-height:1.6}
.manual{font-family:Consolas,monospace;font-size:12.5px;background:#f1f4f9;border-radius:4px;padding:5px 8px;margin-top:4px;letter-spacing:.5px;word-break:break-all}
.ayuda{font-size:12.5px;color:#5a6475;margin-top:8px}
.codigos{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;font-family:Consolas,monospace;font-size:16px;background:#f1f4f9;border-radius:6px;padding:12px;text-align:center;margin:12px 0}
.candado{font-size:42px;text-align:center;margin:0}
a.boton{display:block;margin-top:16px;text-align:center;text-decoration:none;height:42px;line-height:42px;border-radius:6px;background:#1e4fa0;color:#fff;font-weight:600}
@media (max-width:480px){.fila{flex-direction:column;align-items:center}}
@media print{body{background:#fff}.card{box-shadow:none}a.boton,.no-imprimir{display:none}}