/* Mobile navigation — hamburger + fullscreen overlay */

.header__menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  margin-left: auto;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 0.2s ease;
}

.header__menu-btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

.header--on-dark .header__menu-btn {
  color: rgba(255, 255, 255, 0.88);
}

.header--on-dark .header__menu-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.header__menu-icon,
.header__menu-icon::before,
.header__menu-icon::after {
  display: block;
  width: 18px;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.header__menu-icon {
  position: relative;
}

.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.header__menu-icon::before {
  top: -6px;
}

.header__menu-icon::after {
  top: 6px;
}

.header__menu-btn[aria-expanded='true'] .header__menu-icon {
  background: transparent;
}

.header__menu-btn[aria-expanded='true'] .header__menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.header__menu-btn[aria-expanded='true'] .header__menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-height) + 1.5rem) 1.5rem 2rem;
  background: rgba(251, 251, 253, 0.97);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobile-nav__links a {
  display: block;
  padding: 0.85rem 0;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  text-decoration: none;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__links a.is-active {
  color: var(--color-accent);
}

.mobile-nav__locale {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 1.5rem;
}

.mobile-nav__locale .locale__btn {
  flex: 1;
  padding: 0.65rem;
  font-size: 0.875rem;
}

body.nav-open {
  overflow: hidden;
}

@media (max-width: 768px) {
  .header__menu-btn {
    display: inline-flex;
  }

  .header__nav {
    display: none;
  }

  .header__inner {
    gap: 0.75rem;
  }
}

@media (min-width: 769px) {
  .mobile-nav {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .mobile-nav {
    padding: calc(var(--header-height) + 1rem) max(1rem, env(safe-area-inset-left)) 1.5rem;
    padding-right: max(1rem, env(safe-area-inset-right));
    padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
  }

  .mobile-nav__links a {
    font-size: 1.45rem;
    padding: 0.75rem 0;
  }

  .header__menu-btn {
    width: 2.5rem;
    height: 2.5rem;
    margin-right: -0.25rem;
  }
}