/* ==========================================================================
   Hawaii King Kennels — Animations
   Entrance states for elements toggled by IntersectionObserver in
   /assets/js/animations.js. Only transform + opacity are animated (60fps).
   ========================================================================== */

[data-animate] {
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
  will-change: opacity, transform;
}

[data-animate="fade-up"] { transform: translateY(28px); }
[data-animate="fade-down"] { transform: translateY(-28px); }
[data-animate="fade-left"] { transform: translateX(32px); }
[data-animate="fade-right"] { transform: translateX(-32px); }
[data-animate="zoom-in"] { transform: scale(0.92); }

[data-animate].in-view {
  opacity: 1;
  transform: none;
}

/* Stagger groups: children get incremental transition-delay via JS
   (--stagger-index custom property), 80–120ms apart. */
[data-animate-group] > [data-animate] {
  transition-delay: calc(var(--stagger-index, 0) * var(--stagger-step));
}

@media (prefers-reduced-motion: reduce) {
  [data-animate] {
    transition: opacity var(--duration-fast) linear !important;
    transform: none !important;
  }
}

/* ---------------------------------------------------------------------- */
/* Hover micro-interactions (apply directly, not gated by IntersectionObserver) */
/* ---------------------------------------------------------------------- */

.hover-lift {
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.hover-zoom-target {
  overflow: hidden;
}

.hover-zoom-target img {
  transition: transform var(--duration-slow) var(--ease-out);
}

.hover-zoom-target:hover img {
  transform: scale(1.06);
}

.hover-wiggle:hover {
  animation: wiggle 500ms var(--ease-out);
}

@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-8deg); }
  75% { transform: rotate(8deg); }
}

@media (prefers-reduced-motion: reduce) {
  .hover-lift:hover,
  .hover-zoom-target:hover img {
    transform: none;
  }
  .hover-wiggle:hover {
    animation: none;
  }
}

/* ---------------------------------------------------------------------- */
/* Skeleton / loading shimmer (forms, async content)                       */
/* ---------------------------------------------------------------------- */

.shimmer-hkk {
  background: linear-gradient(90deg, var(--bg-alt) 25%, var(--surface) 37%, var(--bg-alt) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .shimmer-hkk {
    animation: none;
  }
}

/* ---------------------------------------------------------------------- */
/* Spinner (button loading state)                                          */
/* ---------------------------------------------------------------------- */

.spinner-hkk {
  display: inline-block;
  width: 1.1em;
  height: 1.1em;
  border: 2.5px solid rgba(255, 255, 255, 0.45);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

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