* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--marca-fuente);
  background:
    linear-gradient(180deg, rgba(241,245,243,.34) 0%, rgba(223,243,232,.44) 100%),
    url('/assets/shared/login-background-academic-network.png') center/cover no-repeat;
  padding: 24px;
}
.caja { position:relative; background:rgba(255,255,255,.92); border:1px solid rgba(199,221,212,.9); border-radius:18px; padding:34px 32px; width:100%; max-width:380px; box-shadow:0 1px 3px rgba(16,24,40,.05),0 22px 54px rgba(16,24,40,.14); backdrop-filter: blur(8px); }
.marca { display:flex; align-items:center; gap:10px; margin-bottom:22px; }
.marca .logo { width:40px; height:40px; flex-shrink:0; object-fit:contain; display:block; }
.marca span.texto { font-size:15px; font-weight:700; font-family:var(--marca-fuente-titulos); color:var(--marca-tinta); line-height:1.2; }
h1 { font-size:16px; margin:0 0 6px; font-family:var(--marca-fuente-titulos); color:var(--marca-verde); }
p.ayuda { font-size:13px; color:var(--marca-apagado); margin:0 0 18px; }
label { display:block; font-size:13px; color:var(--marca-apagado); margin-bottom:4px; font-weight:500; }
input { width:100%; padding:10px 12px; border:1px solid var(--marca-linea); border-radius:8px; font-size:14px; margin-bottom:14px; }
input:focus-visible { outline:2px solid var(--marca-verde); outline-offset:1px; border-color:var(--marca-verde); }
button { width:100%; padding:11px; border:0; border-radius:8px; background:var(--marca-verde); color:#fff; font-size:14px; font-weight:600; cursor:pointer; }
button:hover { opacity:.9; }
button:focus-visible { outline:2px solid var(--marca-verde-profundo); outline-offset:2px; }
.error { background:#fef2f2; color:var(--marca-rojo); border:1px solid #fecaca; border-radius:8px; padding:10px 12px; font-size:13px; margin-bottom:14px; }
.exito { background:var(--marca-mint); color:var(--marca-verde-profundo); border:1px solid var(--marca-linea); border-radius:8px; padding:10px 12px; font-size:13px; margin-bottom:14px; }
.volver { display:inline-block; margin-top:4px; color:var(--marca-verde); font-size:13px; font-weight:600; text-decoration:none; }
.ayuda { font-size:12px; color:var(--marca-apagado); margin-top:14px; text-align:center; }
.codigo-verificacion { font-size:18px; letter-spacing:3px; text-align:center; }
.turnstile { margin-bottom:14px; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }

@media (max-width: 520px) {
  body { align-items: flex-start; padding-top: 72px; background-position: center top; }
  .caja { padding: 28px 24px; }
}