/* ==========================================================================
   CABECERA — franja superior, marca, navegación y cabecera de periódico
   Mobile first · cortes: 48rem (tablet) y 64rem (escritorio)
   ========================================================================== */

/* --- Línea superior y marca ---------------------------------------------- */

.topline {
  border-bottom: 1px solid var(--line);
  font: 500 var(--text-2xs) / 1 var(--font-ui);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.topline__inner {
  padding-block: 0.6rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--color-steel);
  color: var(--color-steel);
  font: 700 0.95rem / 1 var(--font-display);
  letter-spacing: 0.02em;
  transition: background-color var(--duration-normal) var(--ease-out), color var(--duration-normal) var(--ease-out);
}

.brand__name {
  font: 700 1.05rem / 1 var(--font-display);
  color: var(--color-steel);
}

.brand:hover .brand__mark {
  background: var(--color-steel);
  color: var(--color-white);
}

/* --- Cabecera y navegación ----------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-paper) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.site-header.is-stuck {
  box-shadow: 0 10px 24px -20px rgb(0 0 0 / 0.5);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 0.6rem;
}

.nav-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  font-size: 1.5rem;
  color: var(--color-steel);
  border: 1px solid var(--line);
  transition: background-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.nav-toggle:active {
  transform: scale(0.94);
}

.nav-toggle .icon {
  grid-area: 1 / 1;
  transition: opacity var(--duration-fast) var(--ease-out), transform var(--duration-normal) var(--ease-out);
}

.nav-toggle .icon--close {
  opacity: 0;
  transform: rotate(-90deg) scale(0.6);
}

.site-header.is-open .icon--open {
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
}

.site-header.is-open .icon--close {
  opacity: 1;
  transform: none;
}

/* Panel móvil */
.nav {
  position: absolute;
  inset: 100% 0 auto 0;
  padding: var(--space-3) var(--gutter) var(--space-5);
  background: var(--color-paper);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 20px 32px -26px rgb(0 0 0 / 0.5);
  visibility: hidden;
  opacity: 0;
  transform: translateY(-0.5rem);
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out),
    visibility 0s linear var(--duration-normal);
}

.site-header.is-open .nav {
  visibility: visible;
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}

.nav__list {
  display: grid;
}

.nav__link {
  position: relative;
  display: block;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  font: 600 var(--text-xs) / 1.2 var(--font-ui);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.nav__link::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.nav__actions .btn {
  flex: 1;
}

.nav__search {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  font-size: 1.15rem;
  color: var(--color-ink);
  transition: transform var(--duration-normal) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.nav__search:hover {
  background: var(--color-paper-deep);
  transform: rotate(-12deg) scale(1.06);
}

/* --- Cabecera de periódico ------------------------------------------------ */

.masthead {
  padding-top: clamp(1rem, 0.5rem + 2vw, 2rem);
}

.masthead__row {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--space-5);
}

.masthead__name {
  font: 500 clamp(1.3rem, 9.2vw, 6.9rem) / 0.98 var(--font-display);
  letter-spacing: 0.004em;
  text-transform: uppercase;
  color: var(--color-steel);
  white-space: nowrap;
  animation: mast-in 1s var(--ease-out) both;
}

.masthead__tag {
  display: none;
  align-self: center;
  max-width: 9rem;
  padding-left: var(--space-4);
  border-left: 1px solid var(--line-strong);
  font: 500 var(--text-2xs) / 1.9 var(--font-ui);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.masthead__sub {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem clamp(0.4rem, 2.4vw, 0.9rem);
  margin-top: 0.15rem;
  padding-block: 0.6rem 0.55rem;
  border-bottom: 1px solid var(--line-strong);
  font: 500 var(--text-2xs) / 1 var(--font-ui);
  letter-spacing: clamp(0.14em, 1vw + 0.05em, 0.42em);
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

@keyframes mast-in {
  from {
    opacity: 0;
    transform: translateY(0.6rem);
    clip-path: inset(0 0 100% 0);
  }

  to {
    opacity: 1;
    transform: none;
    clip-path: inset(0);
  }
}

/* --- MENÚ COMPLETO ≥ 72rem --- */

@media (min-width: 72rem) {
  .brand {
    display: none;
  }

  .nav-toggle {
    display: none;
  }

  .nav-bar {
    padding-block: 0.15rem;
  }

  .nav {
    position: static;
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav__list {
    display: flex;
    gap: clamp(0.9rem, 2.6vw, 2.75rem);
  }

  .nav__link {
    white-space: nowrap;
    padding: 1.1rem 0;
    border-bottom: 0;
    font-size: var(--text-2xs);
    letter-spacing: 0.2em;
  }

  .nav__link::after {
    inset: auto 0 0.7rem 0;
    height: 1px;
  }

  .nav__actions {
    margin-top: 0;
  }

  .nav__actions .btn {
    flex: none;
  }
}

/* --- Cabecera de periódico ≥ 64rem --- */

@media (min-width: 64rem) {
  .masthead__name {
    font-size: clamp(3.5rem, 8.4vw, 7.5rem);
  }

  .masthead__tag {
    display: block;
  }

  .masthead__sub {
    justify-content: center;
    letter-spacing: 0.5em;
  }
}