:root {
  --azul: #0b3a6e;
  --azul-claro: #e8f0fa;
  --verde: #1f8a4c;
  --texto: #1d2733;
  --gris: #5b6775;
  --borde: #d9e1ea;
  --fondo: #ffffff;
  --fondo-alt: #f5f8fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--texto);
  background: var(--fondo);
  line-height: 1.6;
  font-size: 17px;
}

a { color: var(--azul); }

.contenedor { max-width: 960px; margin: 0 auto; padding: 0 16px; }

header {
  background: var(--azul);
  color: #fff;
}
header .contenedor {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 8px; padding: 14px 16px;
}
.marca { font-weight: 700; font-size: 1.25rem; color: #fff; text-decoration: none; }
.marca small { display: block; font-weight: 400; font-size: .8rem; opacity: .85; }
nav a {
  color: #fff; text-decoration: none; margin-left: 18px; font-size: .95rem;
}
nav a:hover, nav a[aria-current="page"] { text-decoration: underline; }

.portada {
  background: var(--azul-claro);
  padding: 48px 0 40px;
}
.portada h1 { margin: 0 0 12px; font-size: 2rem; color: var(--azul); line-height: 1.25; }
.portada p { margin: 0 0 8px; max-width: 680px; color: var(--gris); }
.sello {
  display: inline-block; margin-top: 12px; padding: 6px 12px;
  border: 1px solid var(--verde); border-radius: 6px;
  color: var(--verde); font-weight: 600; font-size: .95rem; background: #fff;
}

main section { padding: 36px 0; }
main section + section { border-top: 1px solid var(--borde); }
h2 { color: var(--azul); font-size: 1.45rem; margin: 0 0 14px; }
h3 { font-size: 1.1rem; margin: 18px 0 6px; }

.tarjetas {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.tarjeta {
  border: 1px solid var(--borde); border-radius: 8px; padding: 18px;
  background: var(--fondo-alt);
}
.tarjeta h3 { margin-top: 0; }

table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: .95rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--borde); vertical-align: top; }
th { background: var(--fondo-alt); }
.tabla-envoltura { overflow-x: auto; }

.contacto-lista { list-style: none; padding: 0; margin: 0; }
.contacto-lista li { margin-bottom: 6px; }

.nota { color: var(--gris); font-size: .9rem; }

footer {
  background: var(--fondo-alt); border-top: 1px solid var(--borde);
  padding: 24px 0; font-size: .9rem; color: var(--gris);
}
footer a { margin-right: 14px; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .portada h1 { font-size: 1.6rem; }
  nav a { margin: 0 14px 0 0; }
}