/* ============================================
   MEDICEL - Animations & Keyframes
   ============================================ */

/* --- Background Slider Crossfade --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* --- Subtle Ken Burns (zoom) for slides --- */
@keyframes kenBurns {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(1.08);
  }
}

.background-slider .slide.active {
  animation: kenBurns 12s ease-out forwards;
}

/* --- Tile entrance animation (staggered) --- */
@keyframes tileSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tile {
  opacity: 0;
  animation: tileSlideUp 0.6s var(--transition-ease) forwards;
}

.tile:nth-child(1) { animation-delay: 0.1s; }
.tile:nth-child(2) { animation-delay: 0.2s; }
.tile:nth-child(3) { animation-delay: 0.3s; }
.tile:nth-child(4) { animation-delay: 0.4s; }
.tile:nth-child(5) { animation-delay: 0.5s; }
.tile:nth-child(6) { animation-delay: 0.6s; }

/* --- Navigation Open/Close --- */
@keyframes navColumnSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fullscreen-nav.is-open .nav-column {
  animation: navColumnSlideIn 0.5s var(--transition-ease) forwards;
}

.fullscreen-nav.is-open .nav-column:nth-child(1) { animation-delay: 0s; }
.fullscreen-nav.is-open .nav-column:nth-child(2) { animation-delay: 0.07s; }
.fullscreen-nav.is-open .nav-column:nth-child(3) { animation-delay: 0.14s; }
.fullscreen-nav.is-open .nav-column:nth-child(4) { animation-delay: 0.21s; }
.fullscreen-nav.is-open .nav-column:nth-child(5) { animation-delay: 0.28s; }

/* --- Nav column items stagger --- */
@keyframes navItemFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fullscreen-nav.is-open .nav-column-title {
  animation: navItemFadeIn 0.4s ease forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

.fullscreen-nav.is-open .nav-subitems {
  animation: navItemFadeIn 0.4s ease forwards;
  animation-delay: 0.45s;
  opacity: 0;
}

/* --- Wave decoration pulse (very subtle) --- */
@keyframes wavePulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.02);
    opacity: 0.85;
  }
}

.wave-decoration::before {
  animation: wavePulse 8s ease-in-out infinite;
}

.wave-decoration::after {
  animation: wavePulse 10s ease-in-out infinite;
  animation-delay: 2s;
}

/* --- Mobile nav slide --- */
@keyframes mobileSlideIn {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

/* --- Search overlay --- */
@keyframes searchFadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-overlay.is-open .search-container {
  animation: searchFadeIn 0.4s var(--transition-ease) forwards;
}

/* --- Loading spinner for initial page load --- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease;
}

.page-loader.is-loaded {
  opacity: 0;
  pointer-events: none;
}

.page-loader .spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #eee;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* --- Hover ripple effect on tiles (subtle) --- */
@keyframes tileRipple {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.3);
  }
  100% {
    box-shadow: 0 0 0 15px rgba(255, 255, 255, 0);
  }
}

.tile:active {
  animation: tileRipple 0.4s ease-out;
}

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

  .background-slider .slide {
    transition: opacity 0.3s ease;
  }
}