/* ==========================================================================
   animations.css — Scroll-triggered animations, transitions, effects
   ========================================================================== */

/* --- Scroll-triggered base --- */

.animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  will-change: opacity, transform;
}

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

/* --- Directional variants --- */

.animate--left {
  transform: translateX(-40px);
}

.animate--left.is-visible {
  transform: translateX(0);
}

.animate--right {
  transform: translateX(40px);
}

.animate--right.is-visible {
  transform: translateX(0);
}

.animate--scale {
  transform: scale(0.9);
}

.animate--scale.is-visible {
  transform: scale(1);
}

.animate--fade {
  transform: none;
}

.animate--fade.is-visible {
  opacity: 1;
}

/* --- Staggered delays --- */

.animate-delay-1 { transition-delay: 100ms; }
.animate-delay-2 { transition-delay: 200ms; }
.animate-delay-3 { transition-delay: 300ms; }
.animate-delay-4 { transition-delay: 400ms; }
.animate-delay-5 { transition-delay: 500ms; }
.animate-delay-6 { transition-delay: 600ms; }

/* --- Header scroll transition --- */

.header {
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base);
}

.header.is-scrolled {
  background-color: var(--dark-bg);
  box-shadow: var(--shadow-md);
}


/* --- Counter pulse --- */

@keyframes counterPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

.stat__number.is-counting {
  animation: counterPulse 0.4s ease-out;
}

/* --- Lightbox backdrop blur --- */

.lightbox {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* --- Button ripple on click --- */

@keyframes btnPress {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.96);
  }
  100% {
    transform: scale(1);
  }
}

/* --- Card entrance --- */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Hero text entrance --- */

@keyframes heroSlideIn {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__title {
  animation: heroSlideIn 0.8s ease-out 0.2s both;
}

.hero__subtitle {
  animation: heroSlideIn 0.8s ease-out 0.4s both;
}

.hero__actions {
  animation: heroSlideIn 0.8s ease-out 0.6s both;
}

/* --- Decorative line under section titles --- */

@keyframes lineGrow {
  from {
    width: 0;
  }
  to {
    width: 60px;
  }
}

.section__title.is-visible::after {
  animation: lineGrow 0.6s ease-out 0.3s both;
}

/* --- Skeleton loading pulse --- */

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

.skeleton {
  background: linear-gradient(
    90deg,
    var(--border) 25%,
    var(--light-bg) 50%,
    var(--border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* --- Mobile menu slide --- */

.mobile-menu {
  transition: transform var(--transition-base);
}

.mobile-overlay {
  transition: opacity var(--transition-base);
}

/* --- Gallery image hover zoom --- */

@media (hover: hover) {
  .gallery-grid__item img {
    transition: transform var(--transition-base);
  }

  .gallery-grid__item:hover img {
    transform: scale(1.05);
  }
}

/* --- Reduced motion --- */

@media (prefers-reduced-motion: reduce) {
  .animate,
  .animate--left,
  .animate--right,
  .animate--scale,
  .animate--fade {
    opacity: 1;
    transform: none;
    transition: none;
    will-change: auto;
  }

  .animate-delay-1,
  .animate-delay-2,
  .animate-delay-3,
  .animate-delay-4,
  .animate-delay-5,
  .animate-delay-6 {
    transition-delay: 0ms;
  }

  .hero__title,
  .hero__subtitle,
  .hero__actions {
    animation: none;
  }

  .section__title.is-visible::after {
    animation: none;
    width: 60px;
  }

  .stat__number.is-counting {
    animation: none;
  }

  .skeleton {
    animation: none;
  }

  .mobile-menu,
  .mobile-overlay,
  .header {
    transition: none;
  }

  .gallery-grid__item img {
    transition: none;
  }
}