/* ============================================
   MIMIR — HEADER
   ============================================ */

/* ── Accesibilidad: skip link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast);
  background: var(--color-brand-primary);
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

/* ── Wrapper ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--color-border-light);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

/* Compensar el header fixed en el body */
body { padding-top: 72px; }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

/* ── Logo ── */
.site-header__logo a {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo {
  height: 40px;
  width: auto;
}

.site-logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-extrabold);
  color: var(--color-brand-dark);
  letter-spacing: var(--tracking-tight);
}

/* ── Navegación ── */
.primary-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

/* Ítems de primer nivel */
.nav-menu__item { position: relative; }

.nav-menu__link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-body);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
}

.nav-menu__link:hover,
.nav-menu__item.is-active > .nav-menu__link {
  color: var(--color-brand-primary);
  background: var(--color-blue-50);
}

/* Flecha indicadora de submenú */
.nav-menu__arrow {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.55;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav-menu__item.has-dropdown:hover > .nav-menu__link .nav-menu__arrow,
.nav-menu__item.submenu-open > .nav-menu__link .nav-menu__arrow {
  transform: rotate(-135deg) translateY(2px);
}

/* ── Submenú ── */
.nav-menu__submenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 210px;
  background: var(--color-bg-card);
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.nav-menu__item.has-dropdown:hover > .nav-menu__submenu,
.nav-menu__item.has-dropdown:focus-within > .nav-menu__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.nav-menu__sublink {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.nav-menu__sublink:hover,
.nav-menu__subitem.is-active > .nav-menu__sublink {
  color: var(--color-brand-primary);
  background: var(--color-blue-50);
}

/* Botón toggle submenú (solo visible en móvil) */
.nav-submenu-toggle { display: none; }

/* ── Acciones: CTA + toggle ── */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header-cta { display: none; }

/* ── Botón hamburguesa ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 0.5px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition-base);
}

.nav-toggle:hover { background: var(--color-bg-section-alt); }

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-body);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Animación X al abrirse */
.primary-nav.is-open ~ .site-header__actions .nav-toggle .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.primary-nav.is-open ~ .site-header__actions .nav-toggle .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.primary-nav.is-open ~ .site-header__actions .nav-toggle .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Responsive ── */
@media (min-width: 1024px) {
  .header-cta      { display: inline-flex; }
  .nav-toggle      { display: none; }
  .nav-submenu-toggle { display: none; }
}

@media (max-width: 1023px) {
  .nav-toggle { display: flex; }

  .primary-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-card);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: var(--space-4) var(--space-6) var(--space-8);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    border-top: 0.5px solid var(--color-border);
  }

  .primary-nav.is-open { transform: translateX(0); }

  /* Menú raíz en móvil */
  .nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .nav-menu__item {
    border-bottom: 0.5px solid var(--color-border-light);
  }

  /* Wrapper del ítem: enlace + toggle en la misma fila */
  .nav-menu__item.has-dropdown {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .nav-menu__link {
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-2);
    border-radius: 0;
  }

  /* Botón toggle de submenú en móvil */
  .nav-submenu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--transition-base);
  }

  .nav-submenu-toggle:hover { background: var(--color-bg-section-alt); }

  .nav-submenu-toggle__icon {
    display: block;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--color-text-muted);
    border-bottom: 2px solid var(--color-text-muted);
    transform: rotate(45deg) translateY(-2px);
    transition: transform var(--transition-base);
  }

  .nav-menu__item.submenu-open > .nav-submenu-toggle .nav-submenu-toggle__icon {
    transform: rotate(-135deg) translateY(2px);
  }

  /* Submenú móvil — colapsado por defecto */
  .nav-menu__submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background: var(--color-bg-section-alt);
    padding: var(--space-2) 0;
    pointer-events: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
    /* Ocupa ambas columnas del grid */
    grid-column: 1 / -1;
  }

  .nav-menu__item.submenu-open > .nav-menu__submenu {
    pointer-events: auto;
    max-height: 400px;
    padding: var(--space-2) var(--space-4);
  }

  .nav-menu__sublink {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
  }

  /* Flecha desktop oculta en móvil */
  .nav-menu__arrow { display: none; }

  /* CTA en el menú móvil */
  .site-header__actions .header-cta {
    display: inline-flex;
    margin-top: var(--space-5);
    width: 100%;
    justify-content: center;
  }
}