/* Language switch — overlay masks the page; content stays visible underneath */
html.is-lang-locked {
  overflow: hidden;
}

html.is-lang-active {
  cursor: wait;
}

.lang-switch-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-overlay) + 5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, visibility 0.18s ease;
  pointer-events: none;
}

.lang-switch-overlay.is-instant {
  transition: none;
}

.lang-switch-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.lang-switch-spinner {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 3px solid rgba(0, 188, 212, 0.2);
  border-top-color: var(--color-primary);
  animation: lang-switch-spin 0.7s linear infinite;
}

@keyframes lang-switch-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Scroll-triggered reveals (IntersectionObserver + CSS) */
[data-reveal],
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal-stagger] > *:not(.is-revealed) {
  pointer-events: none;
}

[data-reveal].is-revealed,
[data-reveal-stagger] > *.is-revealed {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-animate] {
    opacity: 1 !important;
    transform: none !important;
  }

  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    will-change: auto;
  }

  .lang-switch-spinner {
    animation: none;
    border-top-color: var(--color-primary);
  }
}

/* Hover transitions */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* Image reveal clip */
.img-reveal {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.img-reveal img {
  transform: scale(1.1);
  transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.img-reveal.is-revealed img {
  transform: scale(1);
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-muted) 25%, var(--color-bg-subtle) 50%, var(--color-bg-muted) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
  }
}