/* ============================================
   ETC AdBlue — Animations
   Keyframes, scroll-triggered, hover effects
   ============================================ */

/* ═══════════════════════════════════════
   KEYFRAMES
   ═══════════════════════════════════════ */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Counter animation helper */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   SCROLL-TRIGGERED ANIMATIONS
   ═══════════════════════════════════════ */

/* Base state - elements wait to animate */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

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

/* Variant: fade in from left */
.animate-on-scroll--left {
  transform: translateX(-30px);
}

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

/* Variant: fade in from right */
.animate-on-scroll--right {
  transform: translateX(30px);
}

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

/* Variant: scale in */
.animate-on-scroll--scale {
  transform: scale(0.9);
}

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

/* Staggered delay classes */
.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; }

/* ═══════════════════════════════════════
   LOADING / SKELETON
   ═══════════════════════════════════════ */

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

.skeleton--text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton--title {
  height: 28px;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton--image {
  aspect-ratio: 16 / 10;
  width: 100%;
}

/* ═══════════════════════════════════════
   PAGE LOAD ANIMATION
   ═══════════════════════════════════════ */

.page-loaded .hero__content {
  animation: fadeInUp var(--duration-slower) var(--ease-out) forwards;
}

.page-loaded .hero__overline {
  animation: fadeInUp var(--duration-slower) var(--ease-out) 200ms forwards;
  opacity: 0;
}

.page-loaded .hero__title {
  animation: fadeInUp var(--duration-slower) var(--ease-out) 400ms forwards;
  opacity: 0;
}

.page-loaded .hero__description {
  animation: fadeInUp var(--duration-slower) var(--ease-out) 600ms forwards;
  opacity: 0;
}

.page-loaded .hero__actions {
  animation: fadeInUp var(--duration-slower) var(--ease-out) 800ms forwards;
  opacity: 0;
}

/* ═══════════════════════════════════════
   PREFERS REDUCED MOTION
   ═══════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-loaded .hero__content,
  .page-loaded .hero__overline,
  .page-loaded .hero__title,
  .page-loaded .hero__description,
  .page-loaded .hero__actions {
    animation: none;
    opacity: 1;
  }
}