/* Mobile menu: overlay opened by .site-header__menu (js/nav.js).
   The overlay is a sibling of the header because the header's backdrop-filter
   would otherwise become the containing block of a fixed child. */

.site-header__icon--close { display: none; }
.site-header__menu[aria-expanded="true"] .site-header__icon--open { display: none; }
.site-header__menu[aria-expanded="true"] .site-header__icon--close { display: block; }

/* Keep the header (and its button) above the overlay while open */
html.menu-open .site-header {
  position: fixed;
  z-index: 110;
}

html.menu-open,
html.menu-open body {
  overflow: hidden;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 100;
  box-sizing: border-box;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 40px;
  padding: 96px 24px 40px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgb(1 0 0 / 0.78);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  color: var(--text-nav);
  opacity: 0;
  transform: translateY(-12px);
  visibility: hidden;
  transition: opacity 200ms ease, transform 200ms ease, visibility 0s linear 200ms;
}

.mobile-menu[hidden] { display: none; }

.mobile-menu.is-open {
  opacity: 1;
  transform: none;
  visibility: visible;
  transition: opacity 200ms ease, transform 200ms ease, visibility 0s;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobile-menu__link {
  display: block;
  padding: 12px 0;
  min-height: 44px;
  box-sizing: border-box;
  color: inherit;
  font-weight: 600;
  font-size: 28px;
  letter-spacing: 1px;
  line-height: normal;
  text-transform: uppercase;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.mobile-menu__link:active { opacity: 0.7; }

.mobile-menu__cta {
  display: block;
  box-sizing: border-box;
  padding: 18px 24px;
  background: var(--action-primary);
  color: var(--action-on-primary);
  text-align: center;
  text-decoration: none;
  font-size: 20px;
}

.mobile-menu a:focus-visible {
  outline: 2px solid var(--text-nav);
  outline-offset: 4px;
}

@media (min-width: 960px) {
  .mobile-menu { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-menu,
  .mobile-menu.is-open {
    transition: none;
    transform: none;
  }
}