/**
 * animations.css — Keyframes and animation utilities for KnotAF™
 * Depends on: css/base.css (CSS variables)
 */

/* ============================================================
   SCROLL REVEAL SYSTEM
   ============================================================ */

/* Base state — invisible and shifted down */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 600ms ease,
    transform 600ms ease;
}

/* Revealed state — fully visible */
.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children: each direct child gets a --i custom property
   set by animations.js, used to calculate transition-delay */
.stagger-children > .reveal {
  transition-delay: calc(var(--i, 0) * 80ms);
}

/* Direction variants */
.reveal-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

/* ============================================================
   KEN BURNS — Hero background zoom
   ============================================================ */
@keyframes kenBurns {
  0%   { transform: scale(1)    translate(0%, 0%); }
  33%  { transform: scale(1.06) translate(-1%, -0.5%); }
  66%  { transform: scale(1.04) translate(1%, 0.5%); }
  100% { transform: scale(1.08) translate(-0.5%, 1%); }
}

/* ============================================================
   SKELETON PULSE
   ============================================================ */
@keyframes skeletonPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.skeleton {
  animation: skeletonPulse 1.5s ease infinite;
  background: var(--border);
  border-radius: var(--radius-sm);
}

/* Shimmer variant */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-shimmer {
  background: linear-gradient(
    90deg,
    var(--border) 25%,
    var(--cream) 50%,
    var(--border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease infinite;
  border-radius: var(--radius-sm);
}

/* ============================================================
   SPIN
   ============================================================ */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spin { animation: spin 1s linear infinite; }

/* ============================================================
   FADE IN / OUT
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

.fade-in  { animation: fadeIn  var(--transition-base) ease forwards; }
.fade-out { animation: fadeOut var(--transition-base) ease forwards; }

/* ============================================================
   SLIDE UP / DOWN
   ============================================================ */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.slide-up   { animation: slideUp   300ms ease forwards; }
.slide-down { animation: slideDown 300ms ease forwards; }

/* ============================================================
   BOUNCE
   ============================================================ */
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  30%       { transform: translateY(-8px); }
  60%       { transform: translateY(-4px); }
}

.bounce { animation: bounce 0.6s ease; }

/* ============================================================
   WIGGLE (for cart icon on add-to-cart)
   ============================================================ */
@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  20%       { transform: rotate(-10deg); }
  40%       { transform: rotate(10deg); }
  60%       { transform: rotate(-6deg); }
  80%       { transform: rotate(6deg); }
}

.wiggle { animation: wiggle 0.5s ease; }

/* ============================================================
   HEARTBEAT (for wishlist button)
   ============================================================ */
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  30%       { transform: scale(1.3); }
  60%       { transform: scale(0.9); }
  80%       { transform: scale(1.15); }
}

.heartbeat { animation: heartbeat 0.5s ease; }

/* ============================================================
   FLOAT (WhatsApp button pulse)
   ============================================================ */
@keyframes floatPulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35); }
  50%       { box-shadow: 0 4px 24px rgba(37, 211, 102, 0.6); }
}

.float-pulse { animation: floatPulse 2s ease infinite; }

/* ============================================================
   HERO SLIDE TRANSITIONS
   ============================================================ */
@keyframes heroSlideIn {
  from { opacity: 0; transform: scale(1.04); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes heroSlideOut {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.98); }
}

/* ============================================================
   NUMBER COUNT-UP (for stats)
   ============================================================ */
@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */
@keyframes progressFill {
  from { width: 0; }
  to   { width: var(--progress, 100%); }
}

.progress-bar-animated::after {
  animation: progressFill 1s ease forwards;
}

/* ============================================================
   TOAST SLIDE
   ============================================================ */
@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(-50%) translateY(20px) scale(0.95); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}

/* ============================================================
   REDUCED MOTION — Respect user preference
   Always put last to override everything above
   ============================================================ */
@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;
  }

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