/* Encabezado común de todas las páginas (menú + camino). Va después del CSS propio de cada página. */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.85rem var(--space);
  background: var(--petroleo); color: var(--hielo);
  position: sticky; top: 0; z-index: 40;
  border-bottom: 0; backdrop-filter: none;
  font-family: var(--font-body);
}
.site-header a { text-decoration: none; color: var(--hielo); }
.header-start { display: flex; align-items: center; gap: 1.25rem; min-width: 0; }
.logo img { height: 2.25rem; width: auto; display: block; }

.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.2rem 0.45rem;
  font-family: var(--font-display); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--hielo) 60%, var(--acero));
  padding-left: 1.25rem;
  border-left: 1px solid color-mix(in srgb, var(--hielo) 22%, transparent);
}
.site-header .crumbs a { color: color-mix(in srgb, var(--hielo) 72%, var(--acero)); }
.site-header .crumbs a:hover { color: var(--hielo); }
.crumbs .sep { opacity: 0.6; }
.crumbs [aria-current="page"] { color: var(--hielo); }

.nav { display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem; font-family: var(--font-display); font-size: 0.8rem; font-weight: 600; align-items: center; }
.nav a:hover, .nav a[aria-current="page"] { color: color-mix(in srgb, var(--hielo) 70%, var(--teal)); }
.nav .cta {
  background: var(--alerta); padding: 0.4rem 0.75rem; border-radius: 2px; color: var(--blanco);
}
.nav .cta:hover { color: var(--blanco); background: color-mix(in srgb, var(--alerta) 85%, #000); }

.nav-drop {
  position: relative;
  display: flex;
  align-items: center;
  margin-block: -0.85rem;
  padding-block: 0.85rem;
}
.nav-drop > a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.nav-drop > a::after {
  content: "";
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid color-mix(in srgb, var(--hielo) 65%, transparent);
  margin-top: 1px;
}
.nav-sub {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 12.5rem;
  padding: 0.4rem 0;
  background: var(--grafito);
  border: 1px solid color-mix(in srgb, var(--hielo) 12%, transparent);
  border-radius: 2px;
  box-shadow: 0 12px 28px color-mix(in srgb, #000 35%, transparent);
  z-index: 30;
}
.nav-sub::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 8px;
}
.nav-sub a {
  display: block;
  padding: 0.55rem 0.9rem;
  color: var(--hielo);
  font-size: 0.78rem;
  white-space: nowrap;
}
.nav-sub a:hover,
.nav-sub a:focus-visible {
  background: color-mix(in srgb, var(--petroleo) 70%, #000);
  color: var(--hielo);
}
.nav-sub .muted {
  color: color-mix(in srgb, var(--hielo) 55%, var(--acero));
  font-weight: 500;
  font-size: 0.7rem;
  padding: 0.35rem 0.9rem 0.15rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.nav-drop:hover > .nav-sub,
.nav-drop:focus-within > .nav-sub {
  display: block;
}

.nav-flyout { position: relative; }
.nav-flyout > a { display: flex; align-items: center; gap: 0.5rem; }
.nav-flyout > a::before { content: "‹"; opacity: 0.7; margin-left: -0.5rem; }
.nav-sub2 {
  display: none;
  position: absolute;
  top: -0.4rem;
  right: 100%;
  min-width: 12.5rem;
  padding: 0.4rem 0;
  background: var(--grafito);
  border: 1px solid color-mix(in srgb, var(--hielo) 12%, transparent);
  border-radius: 2px;
  box-shadow: 0 12px 28px color-mix(in srgb, #000 35%, transparent);
}
.nav-sub2 a.nested { padding-left: 1.7rem; font-size: 0.74rem; color: color-mix(in srgb, var(--hielo) 78%, var(--acero)); }
.nav-flyout:hover > .nav-sub2,
.nav-flyout:focus-within > .nav-sub2 { display: block; }

@media (max-width: 719px) {
  .nav-flyout > a::before { content: none; }
  .nav-flyout > a::after { content: "▾"; opacity: 0.7; }
  .nav-sub2 {
    position: static;
    min-width: 0;
    box-shadow: none;
    border: none;
    padding: 0 0 0 0.6rem;
    background: transparent;
  }
  .site-header { flex-wrap: wrap; }
  .header-start { width: 100%; justify-content: space-between; }
  .nav-drop {
    width: 100%;
    margin-block: 0;
    padding-block: 0;
  }
  .nav-sub {
    position: static;
    display: none;
    min-width: 0;
    margin-top: 0.35rem;
    box-shadow: none;
    border: none;
    background: color-mix(in srgb, #000 22%, transparent);
  }
  .nav-sub::before { display: none; }
  .nav-drop:hover > .nav-sub,
  .nav-drop:focus-within > .nav-sub {
    display: block;
  }
}