/* ==========================================================================
   ANIMATIONS — Scroll Reveals, Micro-interactions, Keyframes
   ========================================================================== */

/* ---------- Scroll Reveal (JS toggles .revealed) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(5) { transition-delay: 0.32s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(6) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(7) { transition-delay: 0.48s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(8) { transition-delay: 0.56s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(9) { transition-delay: 0.64s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(10) { transition-delay: 0.72s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(11) { transition-delay: 0.8s; opacity: 1; transform: translateY(0); }
.reveal-stagger.revealed > *:nth-child(12) { transition-delay: 0.88s; opacity: 1; transform: translateY(0); }

/* ---------- Keyframe Animations ---------- */

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

/* Slide Up */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Slide Down */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* Float */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

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

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

/* Pulse */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Bounce subtle */
@keyframes bounceSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ---------- Utility Classes ---------- */
.animate-fadeIn      { animation: fadeIn 0.6s var(--ease-out) forwards; }
.animate-slideUp     { animation: slideUp 0.6s var(--ease-out) forwards; }
.animate-slideDown   { animation: slideDown 0.5s var(--ease-out) forwards; }
.animate-scaleIn     { animation: scaleIn 0.5s var(--ease-out) forwards; }
.animate-float       { animation: float 3s ease-in-out infinite; }
.animate-spin        { animation: spin 1s linear infinite; }
.animate-pulse       { animation: pulse 2s ease-in-out infinite; }
.animate-bounce      { animation: bounceSubtle 1.5s ease-in-out infinite; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg,
    var(--color-surface-2) 25%,
    var(--color-surface-offset) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ---------- Image Ken Burns ---------- */
.ken-burns {
  animation: kenBurns 20s ease-in-out infinite alternate;
}

@keyframes kenBurns {
  0% { transform: scale(1) translateX(0); }
  100% { transform: scale(1.08) translateX(-1.5%); }
}

/* ---------- Counter Number Animation ---------- */
.counter-value {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' on;
}

/* ---------- Hover Transitions ---------- */
.hover-lift {
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hover-grow {
  transition: transform var(--duration-normal) var(--ease-spring);
}

.hover-grow:hover {
  transform: scale(1.03);
}

/* ---------- Page Transition ---------- */
.page-transition {
  animation: fadeIn 0.4s var(--ease-out);
}