/**
 * Animations & Transitions
 * Elegant scroll effects and hover animations
 */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   ANIMATION CLASSES
   ============================================ */
.animate-fade-in {
  animation: fadeIn 0.8s ease-out;
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.animate-fade-in-down {
  animation: fadeInDown 0.8s ease-out;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.8s ease-out;
}

.animate-fade-in-right {
  animation: fadeInRight 0.8s ease-out;
}

.animate-scale-up {
  animation: scaleUp 0.8s ease-out;
}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.scroll-reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.scroll-reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.scroll-reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ============================================
   STAGGER ANIMATIONS (for groups)
   ============================================ */
.stagger-animation > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.stagger-animation.revealed > *:nth-child(1) {
  transition-delay: 0.1s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(2) {
  transition-delay: 0.2s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(3) {
  transition-delay: 0.3s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(4) {
  transition-delay: 0.4s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(5) {
  transition-delay: 0.5s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(6) {
  transition-delay: 0.6s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(7) {
  transition-delay: 0.7s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(8) {
  transition-delay: 0.8s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(9) {
  transition-delay: 0.9s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(10) {
  transition-delay: 1s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(11) {
  transition-delay: 1.1s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(12) {
  transition-delay: 1.2s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(13) {
  transition-delay: 1.3s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(14) {
  transition-delay: 1.4s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(15) {
  transition-delay: 1.5s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(16) {
  transition-delay: 1.6s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(17) {
  transition-delay: 1.7s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(18) {
  transition-delay: 1.8s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(19) {
  transition-delay: 1.9s;
  opacity: 1;
  transform: translateY(0);
}

.stagger-animation.revealed > *:nth-child(20) {
  transition-delay: 2s;
  opacity: 1;
  transform: translateY(0);
}

/* For any items beyond 20, show them with the same delay as item 20 */
.stagger-animation.revealed > *:nth-child(n+21) {
  transition-delay: 2s;
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   COUNTER ANIMATIONS
   ============================================ */
@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.counter {
  animation: countUp 0.5s ease-out;
}

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

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

/* ============================================
   PULSE ANIMATION
   ============================================ */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================
   SCROLL DOWN INDICATOR
   ============================================ */
@keyframes scrollDown {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateY(15px);
    opacity: 0;
  }
}

.scroll-indicator {
  animation: scrollDown 2s ease-in-out infinite;
}

/* ============================================
   SHIMMER EFFECT
   ============================================ */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.shimmer {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ============================================
   KENBURNS EFFECT (for images)
   ============================================ */
@keyframes kenburns {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(1.1);
  }
}

.kenburns {
  animation: kenburns 20s ease-out infinite alternate;
}

/* ============================================
   BACK TO TOP BUTTON ANIMATION
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-gold);
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   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;
  }

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

  .stagger-animation > * {
    opacity: 1;
    transform: none;
  }
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}