/**
 * VIT Bargarh - Animation Utilities
 * Version: 2.0.0
 *
 * Advanced animation utilities and scroll-triggered animations
 */

/* ================================================
   SCROLL-TRIGGERED ANIMATION CLASSES
   Use with IntersectionObserver in JavaScript
   ================================================ */

/* Base state for scroll animations */
[data-animate] {
  opacity: 0;
  transition-property: opacity, transform;
  transition-duration: var(--duration-700);
  transition-timing-function: var(--ease-out);
}

[data-animate].is-visible {
  opacity: 1;
  transform: none;
}

/* Fade animations */
[data-animate="fade"] {
  opacity: 0;
}

[data-animate="fade-up"] {
  transform: translateY(40px);
}

[data-animate="fade-down"] {
  transform: translateY(-40px);
}

[data-animate="fade-left"] {
  transform: translateX(40px);
}

[data-animate="fade-right"] {
  transform: translateX(-40px);
}

/* Scale animations */
[data-animate="scale"] {
  transform: scale(0.9);
}

[data-animate="scale-up"] {
  transform: scale(0.9) translateY(20px);
}

/* Zoom animations */
[data-animate="zoom-in"] {
  transform: scale(0.5);
}

[data-animate="zoom-out"] {
  transform: scale(1.2);
}

/* Flip animations */
[data-animate="flip-up"] {
  transform: perspective(1000px) rotateX(10deg) translateY(30px);
}

[data-animate="flip-down"] {
  transform: perspective(1000px) rotateX(-10deg) translateY(-30px);
}

/* ================================================
   ANIMATION DELAYS
   ================================================ */

[data-delay="100"] { transition-delay: 100ms; }
[data-delay="200"] { transition-delay: 200ms; }
[data-delay="300"] { transition-delay: 300ms; }
[data-delay="400"] { transition-delay: 400ms; }
[data-delay="500"] { transition-delay: 500ms; }
[data-delay="600"] { transition-delay: 600ms; }
[data-delay="700"] { transition-delay: 700ms; }
[data-delay="800"] { transition-delay: 800ms; }
[data-delay="900"] { transition-delay: 900ms; }
[data-delay="1000"] { transition-delay: 1000ms; }

/* ================================================
   ANIMATION DURATIONS
   ================================================ */

[data-duration="fast"] {
  transition-duration: var(--duration-300);
}

[data-duration="normal"] {
  transition-duration: var(--duration-500);
}

[data-duration="slow"] {
  transition-duration: var(--duration-700);
}

[data-duration="slower"] {
  transition-duration: var(--duration-1000);
}

/* ================================================
   STAGGER ANIMATIONS FOR LISTS
   ================================================ */

.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-500) var(--ease-out),
              transform var(--duration-500) var(--ease-out);
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 500ms; }
.stagger-children.is-visible > *:nth-child(7) { transition-delay: 600ms; }
.stagger-children.is-visible > *:nth-child(8) { transition-delay: 700ms; }
.stagger-children.is-visible > *:nth-child(9) { transition-delay: 800ms; }
.stagger-children.is-visible > *:nth-child(10) { transition-delay: 900ms; }
.stagger-children.is-visible > *:nth-child(11) { transition-delay: 1000ms; }
.stagger-children.is-visible > *:nth-child(12) { transition-delay: 1100ms; }

.stagger-children.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================
   FLOATING ANIMATIONS
   ================================================ */

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

@keyframes floatSlow {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(2deg);
  }
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-float-slow {
  animation: floatSlow 6s ease-in-out infinite;
}

/* ================================================
   BOUNCE ANIMATIONS
   ================================================ */

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-bounce {
  animation: bounce 2s infinite;
}

.animate-bounce-in {
  animation: bounceIn var(--duration-700) var(--ease-out);
}

/* ================================================
   SHAKE ANIMATION
   ================================================ */

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.animate-shake {
  animation: shake 0.5s ease-in-out;
}

/* ================================================
   HEARTBEAT ANIMATION
   ================================================ */

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.1); }
  50% { transform: scale(1); }
  75% { transform: scale(1.1); }
}

.animate-heartbeat {
  animation: heartbeat 1.5s ease-in-out infinite;
}

/* ================================================
   GLOW ANIMATION
   ================================================ */

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px var(--vit-primary-300),
                0 0 10px var(--vit-primary-300),
                0 0 15px var(--vit-primary-300);
  }
  50% {
    box-shadow: 0 0 10px var(--vit-primary-400),
                0 0 20px var(--vit-primary-400),
                0 0 30px var(--vit-primary-400);
  }
}

.animate-glow {
  animation: glow 2s ease-in-out infinite;
}

/* ================================================
   TYPING ANIMATION
   ================================================ */

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink {
  0%, 50% { border-color: transparent; }
  51%, 100% { border-color: var(--vit-primary); }
}

.animate-typing {
  overflow: hidden;
  white-space: nowrap;
  border-right: 3px solid var(--vit-primary);
  animation: typing 3s steps(40, end),
             blink 0.75s step-end infinite;
}

/* ================================================
   MORPHING BACKGROUND
   ================================================ */

@keyframes morphBg {
  0%, 100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  50% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
}

.animate-morph {
  animation: morphBg 8s ease-in-out infinite;
}

/* ================================================
   PARALLAX SCROLL EFFECT
   ================================================ */

.parallax {
  overflow: hidden;
}

.parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 140%;
  background-size: cover;
  background-position: center;
  will-change: transform;
}

/* ================================================
   COUNTER ANIMATION
   ================================================ */

.counter {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ================================================
   NEWS TICKER ANIMATION
   ================================================ */

@keyframes ticker {
  0% {
    transform: translateX(100%);
  }
  100% {
    transform: translateX(-100%);
  }
}

.news-ticker {
  display: flex;
  overflow: hidden;
  white-space: nowrap;
}

.news-ticker-content {
  display: inline-flex;
  animation: ticker 20s linear infinite;
}

.news-ticker:hover .news-ticker-content {
  animation-play-state: paused;
}

/* ================================================
   SLIDE IN/OUT FOR MOBILE MENU
   ================================================ */

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutLeft {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(-100%);
    opacity: 0;
  }
}

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

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

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

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

.animate-slide-in-left {
  animation: slideInLeft var(--duration-300) var(--ease-out) forwards;
}

.animate-slide-out-left {
  animation: slideOutLeft var(--duration-300) var(--ease-in) forwards;
}

.animate-slide-in-right {
  animation: slideInRight var(--duration-300) var(--ease-out) forwards;
}

.animate-slide-out-right {
  animation: slideOutRight var(--duration-300) var(--ease-in) forwards;
}

.animate-slide-in-up {
  animation: slideInUp var(--duration-300) var(--ease-out) forwards;
}

.animate-slide-in-down {
  animation: slideInDown var(--duration-300) var(--ease-out) forwards;
}

/* ================================================
   RIPPLE EFFECT
   ================================================ */

.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease, opacity 0.6s ease;
  opacity: 0;
}

.ripple:active::after {
  width: 300px;
  height: 300px;
  opacity: 1;
  transition: 0s;
}

/* ================================================
   REDUCED MOTION SUPPORT
   ================================================ */

@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;
  }

  [data-animate],
  .scroll-animate {
    opacity: 1;
    transform: none;
  }

  .animate-float,
  .animate-float-slow,
  .animate-bounce,
  .animate-heartbeat,
  .animate-glow,
  .animate-typing,
  .animate-morph,
  .news-ticker-content {
    animation: none;
  }
}