/* ============================================================
   Nordic Jet Detailing — animations.css
   @keyframes, Scroll Animations, Transitions
   ============================================================ */

/* ============================================================
   @KEYFRAMES
   ============================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-28px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(28px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes scrollPulse {
  0%, 100% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  50% {
    transform: scaleY(0.5);
    transform-origin: top;
    opacity: 0.5;
  }
}

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

@keyframes lineExpand {
  from { width: 0; }
  to   { width: 4rem; }
}

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

/* ============================================================
   SCROLL-TRIGGERED ANIMATIONS
   Base state: hidden. JS adds .is-visible to trigger.
   ============================================================ */

/* Default: fade-in-up */
.animate {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}

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

/* Variant: fade-in only */
.animate--fade {
  opacity: 0;
  transform: none;
  transition: opacity var(--dur-slow) var(--ease-out-expo);
}
.animate--fade.is-visible {
  opacity: 1;
}

/* Variant: fade-in from left */
.animate--left {
  opacity: 0;
  transform: translateX(-32px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}
.animate--left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Variant: fade-in from right */
.animate--right {
  opacity: 0;
  transform: translateX(32px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}
.animate--right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Variant: scale-in */
.animate--scale {
  opacity: 0;
  transform: scale(0.93);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}
.animate--scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays (applied to children via JS) */
.animate--delay-100 { transition-delay: 100ms; }
.animate--delay-200 { transition-delay: 200ms; }
.animate--delay-300 { transition-delay: 300ms; }
.animate--delay-400 { transition-delay: 400ms; }
.animate--delay-500 { transition-delay: 500ms; }
.animate--delay-600 { transition-delay: 600ms; }

/* ============================================================
   GOLD LINE ANIMATED
   ============================================================ */
.gold-line {
  transition: width var(--dur-xslow) var(--ease-out-expo);
}
.gold-line.is-visible {
  width: 4rem;
}

/* ============================================================
   STAT COUNTER — enter animation
   ============================================================ */
.stat-item__number {
  transition: opacity var(--dur-slow) var(--ease-out-expo),
              transform var(--dur-slow) var(--ease-out-expo);
}
.stat-item.animate:not(.is-visible) .stat-item__number {
  opacity: 0;
  transform: translateY(10px);
}

/* ============================================================
   HERO PARALLAX LAYER
   ============================================================ */
.hero__bg img {
  will-change: transform;
}

/* ============================================================
   BEFORE/AFTER SLIDER
   ============================================================ */
.before-after {
  position: relative;
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
  touch-action: none;
}

.before-after__before,
.before-after__after {
  position: absolute;
  inset: 0;
}

.before-after__before {
  z-index: 1;
}
.before-after__before img,
.before-after__after img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  display: block;
}

.before-after__clip {
  position: absolute;
  inset: 0;
  z-index: 2;
  clip-path: inset(0 50% 0 0);
  transition: clip-path 0ms; /* handled by JS for drag */
}

.before-after__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 3;
  width: 2px;
  background: var(--color-gold);
  transform: translateX(-50%);
  pointer-events: none;
}

.before-after__handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 4;
  width: 44px;
  height: 44px;
  background: var(--color-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy-deep);
  box-shadow: 0 2px 16px rgba(0,0,0,0.4);
  pointer-events: none;
}
.before-after__handle svg {
  width: 20px;
  height: 20px;
}

.before-after__label {
  position: absolute;
  top: var(--space-4);
  z-index: 5;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  pointer-events: none;
}
.before-after__label--before {
  left: var(--space-4);
  background: rgba(10,22,40,0.8);
  color: var(--color-platinum);
}
.before-after__label--after {
  right: var(--space-4);
  background: var(--color-gold);
  color: var(--color-navy-deep);
}

/* Gallery grid of before/after pairs */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
.gallery-grid .before-after {
  height: 320px;
}

/* ============================================================
   PAGE TRANSITIONS (JS-assisted)
   ============================================================ */
body.page-transitioning {
  animation: fadeIn 0.4s var(--ease-premium);
}

/* ============================================================
   HOVER GLOW EFFECT (used on key CTAs)
   ============================================================ */
.hover-glow {
  transition: box-shadow var(--dur-med) var(--ease-premium);
}
.hover-glow:hover {
  box-shadow: var(--shadow-gold);
}

/* ============================================================
   GOLD SHIMMER TEXT (optional hero accent)
   ============================================================ */
.text-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-gold-dark) 0%,
    var(--color-gold-light) 40%,
    var(--color-gold) 60%,
    var(--color-gold-dark) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: goldShimmer 4s linear infinite;
}

/* ============================================================
   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;
  }

  .animate {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .animate.is-visible {
    opacity: 1;
    transform: none;
  }
}