/**
 * Page Transitions - 2026 UX Enhancement
 *
 * Smooth fade transitions when navigating between pages.
 * Works with View Transitions API where supported, with CSS fallback.
 */

/* ===== VIEW TRANSITIONS API (Chrome 111+, Edge 111+) ===== */
@view-transition {
  navigation: auto;
}

/* Customize the transition animations */
::view-transition-old(root) {
  animation: fade-out 0.2s ease-out forwards;
}

::view-transition-new(root) {
  animation: fade-in 0.3s ease-in forwards;
}

@keyframes fade-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== CSS FALLBACK (all browsers) ===== */

/* Page load animation */
.page-enter {
  animation: page-fade-in 0.4s ease-out forwards;
}

@keyframes page-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Content sections stagger animation */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for multiple elements */
.animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }

  .page-enter {
    animation: none;
    opacity: 1;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== LOADING OVERLAY ===== */
.page-loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.page-loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.page-loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(212, 175, 55, 0.2);
  border-top-color: var(--accent-color, #d4af37);
  border-radius: 50%;
  animation: loading-spin 0.8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-loading-spinner {
    animation: none;
    border-top-color: var(--accent-color, #d4af37);
    border-right-color: var(--accent-color, #d4af37);
  }
}