/**
 * Animation & Micro-Interaction Styles
 *
 * Provides scroll reveal animations, stagger helpers, interactive hover states,
 * skeleton loading shimmers, spinners, and reduced motion accessibility overrides.
 *
 * @package Lambwolf_Theme
 */

/* ==========================================================================
   1. Scroll Reveal Animations
   ========================================================================== */

/**
 * Base reveal element. Initial state is invisible and slightly offset downwards.
 * Revealed by adding .is-visible (e.g. via IntersectionObserver in scroll-animations.js).
 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

/* Directional & Scale Reveal Variants */
.reveal--fade {
  transform: none;
}

.reveal--fade.is-visible {
  transform: none;
  opacity: 1;
}

.reveal--left {
  transform: translateX(-30px);
}

.reveal--left.is-visible {
  transform: translateX(0);
  opacity: 1;
}

.reveal--right {
  transform: translateX(30px);
}

.reveal--right.is-visible {
  transform: translateX(0);
  opacity: 1;
}

.reveal--scale {
  transform: scale(0.94);
}

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

/* ==========================================================================
   2. Stagger Helpers
   ========================================================================== */

.reveal-delay-1,
.reveal[data-delay="100"] {
  transition-delay: 100ms;
}

.reveal-delay-2,
.reveal[data-delay="200"] {
  transition-delay: 200ms;
}

.reveal-delay-3,
.reveal[data-delay="300"] {
  transition-delay: 300ms;
}

.reveal-delay-4,
.reveal[data-delay="400"] {
  transition-delay: 400ms;
}

.reveal-delay-5,
.reveal[data-delay="500"] {
  transition-delay: 500ms;
}

/* Children Staggering Helper */
.reveal-stagger > *:nth-child(1) { transition-delay: 50ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 120ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 190ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 260ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 330ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 400ms; }

/* ==========================================================================
   3. Button & Link Micro-Interactions
   ========================================================================== */

/* Enhanced Button Hover Lift */
.btn {
  position: relative;
  transition: transform var(--transition-fast, 150ms ease),
              background-color var(--transition-base, 300ms ease),
              border-color var(--transition-base, 300ms ease),
              color var(--transition-base, 300ms ease),
              box-shadow var(--transition-base, 300ms ease);
}

.btn:hover:not(:disabled):not(.disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.06));
}

.btn:active:not(:disabled):not(.disabled) {
  transform: translateY(0) scale(0.985);
}

.btn--primary:hover:not(:disabled) {
  box-shadow: 0 4px 14px rgba(139, 157, 131, 0.35);
}

.btn--dark:hover:not(:disabled) {
  box-shadow: 0 4px 14px rgba(26, 26, 26, 0.25);
}

/* Card Hover Lift */
.hover-lift,
.product-card,
.collection-card {
  transition: transform var(--transition-base, 300ms ease),
              box-shadow var(--transition-base, 300ms ease);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0, 0, 0, 0.08));
}

/* Underline Sweep Links */
.link-hover,
.link-sweep {
  position: relative;
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0% 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size var(--transition-base, 300ms ease), color var(--transition-fast, 150ms ease);
}

.link-hover:hover,
.link-sweep:hover {
  background-size: 100% 1px;
}

/* Image Zoom on Container Hover */
.img-zoom {
  overflow: hidden;
}

.img-zoom img {
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.img-zoom:hover img {
  transform: scale(1.04);
}

/* Soft Fade In Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-base, 300ms ease) forwards;
}

/* Slide Up Fade In */
@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-up-fade {
  animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ==========================================================================
   4. Skeleton / Loading Shimmer
   ========================================================================== */

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

.skeleton {
  display: block;
  background: linear-gradient(
    90deg,
    var(--color-bg-alt, #F3F0EB) 25%,
    #E8E4DD 37%,
    var(--color-bg-alt, #F3F0EB) 63%
  );
  background-size: 400% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border-radius: var(--radius-sm, 4px);
  pointer-events: none;
}

.skeleton--rounded {
  border-radius: var(--radius-full, 9999px);
}

.skeleton-text {
  height: 0.9em;
  margin-bottom: var(--space-xs, 4px);
  width: 100%;
}

.skeleton-text--short {
  width: 50%;
}

.skeleton-text--medium {
  width: 75%;
}

.skeleton-title {
  height: 1.4em;
  width: 65%;
  margin-bottom: var(--space-sm, 8px);
}

.skeleton-image {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md, 8px);
}

.skeleton-button {
  height: 48px;
  width: 140px;
}

/* ==========================================================================
   5. Loading Spinners
   ========================================================================== */

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

.spinner,
.btn__spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0, 0, 0, 0.15);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  vertical-align: middle;
  box-sizing: border-box;
}

.spinner--light,
.btn--primary .btn__spinner,
.btn--dark .btn__spinner {
  border-color: rgba(255, 255, 255, 0.25);
  border-top-color: var(--color-white, #FFFFFF);
}

.spinner--sm {
  width: 14px;
  height: 14px;
  border-width: 1.5px;
}

.spinner--lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

/* Button Loading State Helper */
.btn.is-loading {
  position: relative;
  pointer-events: none;
}

.btn.is-loading .btn__text {
  opacity: 0;
  visibility: hidden;
}

.btn.is-loading .btn__spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -9px;
  margin-left: -9px;
  display: inline-block;
}

/* ==========================================================================
   6. Accessibility: Reduced Motion Override
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal--fade,
  .reveal--left,
  .reveal--right,
  .reveal--scale {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .skeleton {
    animation: none !important;
    background: var(--color-bg-alt, #F3F0EB) !important;
  }

  .spinner,
  .btn__spinner {
    animation: none !important;
  }

  .btn:hover,
  .hover-lift:hover {
    transform: none !important;
  }

  .img-zoom:hover img {
    transform: none !important;
  }
}