/* Cabecera: logo + sección actual · Contacto · menú.
   data-tone="ink" | "white" lo decide JS según el fondo que hay debajo. */
.site-header {
  --fg: var(--ink);
  --bg: transparent;
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  min-height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  padding: calc(env(safe-area-inset-top, 0px) + 22px) var(--gutter-r) 14px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: clamp(1rem, 4vw, 4rem);
  color: var(--fg);
  background: var(--bg);
  transition: color var(--dur-2) ease, background-color var(--dur-2) ease, box-shadow var(--dur-2) ease;
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }
.site-header[data-tone="white"] { --fg: var(--on-blue); }
.site-header[data-solid="true"][data-tone="ink"] {
  --bg: rgb(247 248 250 / 0.88);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  box-shadow: 0 1px 0 var(--rule);
}
.site-header[data-solid="true"][data-tone="white"] { --bg: var(--blue); }
.site-header[data-solid="true"][data-surface="dark"] { --bg: rgb(15 16 19 / 0.97); }
.site-header[data-surface="dark"] .site-header__contact:hover { color: #0F1013; }
.is-loading .site-header { opacity: 0; }

.site-header__id { display: grid; gap: 4px; justify-self: start; }
.site-header__logo {
  font-weight: 800;
  font-size: clamp(1.35rem, 1.1rem + 0.9vw, 2.1rem);
  letter-spacing: -0.06em;
  line-height: 1;
  white-space: nowrap;
}
.site-header__logo sup { font-size: 0.42em; top: -0.95em; }
.site-header__section {
  font-size: clamp(0.8rem, 0.72rem + 0.35vw, 1.1rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.site-header__contact { margin-top: -6px; }
.site-header__contact:hover { background: var(--fg); color: var(--bg-solid, var(--paper)); }
.site-header[data-tone="white"] .site-header__contact:hover { color: var(--blue); }

.menu-toggle {
  display: grid;
  place-items: center;
  width: 48px; height: 48px;
  margin: -8px -8px 0 0;
}
.menu-toggle__icon { display: grid; gap: 9px; width: 46px; }
.menu-toggle__icon i { display: block; height: 2.5px; background: currentColor; transition: transform var(--dur-2) var(--ease-out); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon i:first-child { transform: translateY(5.75px) rotate(28deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon i:last-child { transform: translateY(-5.75px) rotate(-28deg); }

@media (max-width: 699px) {
  .site-header { padding-top: calc(env(safe-area-inset-top, 0px) + 16px); gap: 12px; }
  .site-header__contact { min-height: 40px; padding-inline: 1em; font-size: 0.75rem; margin-top: -2px; }
  .menu-toggle__icon { width: 34px; gap: 7px; }
}
@media (max-width: 379px) { .site-header__contact { display: none; } }

/* ---------- Menú a pantalla completa ---------- */
.site-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  align-content: center;
  gap: var(--space-4);
  padding: calc(var(--header-h) + env(safe-area-inset-top, 0px) + 1rem) var(--gutter-r) calc(env(safe-area-inset-bottom, 0px) + 2rem) var(--gutter);
  background: var(--blue);
  color: var(--on-blue);
  overflow-y: auto;
  opacity: 0;
  transition: opacity var(--dur-2) ease;
}
.site-menu[hidden] { display: none; }
.site-menu.is-open { opacity: 1; }
.site-menu__list { display: grid; }
.site-menu__list a {
  display: flex;
  align-items: baseline;
  gap: clamp(0.75rem, 2vw, 2rem);
  padding-block: 0.08em;
  font-size: clamp(2.2rem, 1rem + 6vw, 6.5rem);
  font-weight: 800;
  letter-spacing: var(--track-display);
  line-height: 1;
  transition: transform var(--dur-2) var(--ease-out), opacity var(--dur-2) ease;
}
.site-menu__list a b { font-size: max(0.8rem, 0.18em); font-weight: 500; letter-spacing: 0.04em; transform: translateY(-1.2em); }
.site-menu__list:hover a { opacity: 0.45; }
.site-menu__list a:hover, .site-menu__list a:focus-visible { opacity: 1; transform: translateX(0.15em); }
.site-menu__foot {
  display: flex; flex-wrap: wrap; gap: 0.75rem 2rem;
  font-size: var(--fs-small); font-weight: 600; letter-spacing: var(--track-label); text-transform: uppercase;
}
.site-menu__foot a { min-height: 44px; display: inline-flex; align-items: center; }

/* Navegación completa en escritorio (la portada azul la muestra en blanco) */
.site-nav { display: none; }
@media (min-width: 1100px) {
  .site-header { grid-template-columns: 1fr auto auto; align-items: center; }
  .site-header__section { display: none; }
  .site-nav {
    display: flex;
    gap: clamp(1.25rem, 2.4vw, 2.75rem);
    font-size: clamp(0.8rem, 0.7rem + 0.2vw, 0.95rem);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .site-nav a { position: relative; padding-block: 0.6rem; }
  .site-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0.3rem; height: 1.5px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform var(--dur-2) var(--ease-out); }
  .site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); }
  .site-header__contact { margin-top: 0; }
  .menu-toggle { display: none; }
}

/* Con el menú abierto, Contacto ya está en la lista: el botón sobra */
.site-header.is-menu-open .site-header__contact { opacity: 0; visibility: hidden; pointer-events: none; }

/* el menú recibe el foco al abrirse: sin recuadro */
.site-menu:focus, .site-menu:focus-visible { outline: none; }