/* ============================================================
   ExploringLanka — Animations & Transitions
   All keyframes and motion utilities
   ============================================================ */

/* ─── Keyframes ─────────────────────────────────────────── */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to   { transform: translateY(0); }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes kenBurns {
  0%   { transform: scale(1)    translateX(0)    translateY(0); }
  33%  { transform: scale(1.08) translateX(-1%)  translateY(-1%); }
  66%  { transform: scale(1.05) translateX(1%)   translateY(-0.5%); }
  100% { transform: scale(1)    translateX(0)    translateY(0); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

@keyframes bounceSm {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-5px); }
}

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

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

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

@keyframes goldGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(201,150,58,0.2); }
  50%       { box-shadow: 0 0 40px rgba(201,150,58,0.5); }
}

@keyframes textReveal {
  from {
    opacity: 0;
    transform: translateY(24px) skewY(2deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) skewY(0deg);
  }
}

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

@keyframes ripple {
  0%   { transform: scale(0); opacity: 0.6; }
  100% { transform: scale(4); opacity: 0; }
}

@keyframes heartBeat {
  0%   { transform: scale(1); }
  14%  { transform: scale(1.3); }
  28%  { transform: scale(1); }
  42%  { transform: scale(1.2); }
  70%  { transform: scale(1); }
}

@keyframes drawLine {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

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

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes modalSlideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes toastSlideIn {
  from {
    transform: translateX(110%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ─── Animation Utility Classes ─────────────────────────── */

.anim-fade-in {
  animation: fadeIn var(--transition-slow) ease both;
}

.anim-fade-up {
  animation: fadeInUp 0.6s ease both;
}

.anim-fade-down {
  animation: fadeInDown 0.6s ease both;
}

.anim-scale-in {
  animation: scaleIn 0.5s ease both;
}

.anim-ken-burns {
  animation: kenBurns 20s ease-in-out infinite;
}

.anim-bounce {
  animation: bounce 2s ease-in-out infinite;
}

.anim-float {
  animation: float 4s ease-in-out infinite;
}

.anim-pulse {
  animation: pulse 2s ease-in-out infinite;
}

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

.anim-gold-glow {
  animation: goldGlow 3s ease-in-out infinite;
}

/* ─── Scroll-Reveal (JS-triggered) ─────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal--left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal--right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal--scale {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger delays */
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }
.reveal-delay-6 { transition-delay: 600ms; }

/* ─── Hover Transitions ─────────────────────────────────── */

.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  will-change: transform;
}

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

.hover-scale {
  transition: transform var(--transition-normal);
  will-change: transform;
}

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

.hover-glow {
  transition: box-shadow var(--transition-normal);
}

.hover-glow:hover,
.hover-glow:active {
  box-shadow: var(--shadow-glow);
}

/* ─── Image Ken Burns Container ─────────────────────────── */

.kb-container {
  overflow: hidden;
}

.kb-container img,
.kb-container .kb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: kenBurns 20s ease-in-out infinite;
  will-change: transform;
}

/* ─── Shimmer Skeleton ───────────────────────────────────── */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--deep-3) 25%,
    var(--deep-light) 50%,
    var(--deep-3) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ─── 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;
  }

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

  .kb-container img,
  .kb-container .kb-img {
    animation: none;
  }
}