/* ==========================================
   Animation Styles - LearnEase
   ==========================================
   Advanced animations, transitions, and micro-interactions
   ========================================== */

/* Keyframe Animations */
@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 slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes scaleOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.8);
  }
}

@keyframes rotateIn {
  from {
    opacity: 0;
    transform: rotate(-90deg);
  }
  to {
    opacity: 1;
    transform: rotate(0);
  }
}

@keyframes flipIn {
  from {
    opacity: 0;
    transform: perspective(1000px) rotateY(-90deg);
  }
  to {
    opacity: 1;
    transform: perspective(1000px) rotateY(0);
  }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale3d(0.3, 0.3, 0.3);
  }
  50% {
    opacity: 1;
  }
  to {
    transform: scale3d(1, 1, 1);
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    transform: translateY(0);
  }
  40%, 43% {
    animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
    transform: translateY(-30px);
  }
  70% {
    animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
    transform: translateY(-15px);
  }
  90% {
    transform: translateY(-4px);
  }
}

@keyframes pulse {
  0% {
    transform: scale3d(1, 1, 1);
  }
  50% {
    transform: scale3d(1.05, 1.05, 1.05);
  }
  100% {
    transform: scale3d(1, 1, 1);
  }
}

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

@keyframes wiggle {
  0%, 7% {
    transform: rotateZ(0);
  }
  15% {
    transform: rotateZ(-15deg);
  }
  20% {
    transform: rotateZ(10deg);
  }
  25% {
    transform: rotateZ(-10deg);
  }
  30% {
    transform: rotateZ(6deg);
  }
  35% {
    transform: rotateZ(-4deg);
  }
  40%, 100% {
    transform: rotateZ(0);
  }
}

@keyframes rubberBand {
  0% {
    transform: scale3d(1, 1, 1);
  }
  30% {
    transform: scale3d(1.25, 0.75, 1);
  }
  40% {
    transform: scale3d(0.75, 1.25, 1);
  }
  50% {
    transform: scale3d(1.15, 0.85, 1);
  }
  65% {
    transform: scale3d(0.95, 1.05, 1);
  }
  75% {
    transform: scale3d(1.05, 0.95, 1);
  }
  100% {
    transform: scale3d(1, 1, 1);
  }
}

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

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

@keyframes slideInFromRight {
  0% {
    opacity: 0;
    transform: translateX(100%);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes blinkCursor {
  from, to {
    border-color: transparent;
  }
  50% {
    border-color: var(--primary-color);
  }
}

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

@keyframes floatingSlow {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

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

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

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

@keyframes textGlow {
  0%, 100% {
    text-shadow: 0 0 5px var(--primary-color), 0 0 10px var(--primary-color);
  }
  50% {
    text-shadow: 0 0 10px var(--primary-color), 0 0 20px var(--primary-color), 0 0 30px var(--primary-color);
  }
}

@keyframes borderRotate {
  0% {
    border-image-source: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  }
  25% {
    border-image-source: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  }
  50% {
    border-image-source: linear-gradient(225deg, var(--primary-color), var(--secondary-color));
  }
  75% {
    border-image-source: linear-gradient(315deg, var(--primary-color), var(--secondary-color));
  }
  100% {
    border-image-source: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  }
}

/* Animation Classes */
.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fade-in-down {
  animation: fadeInDown 0.6s ease-out forwards;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.6s ease-out forwards;
}

.animate-fade-in-right {
  animation: fadeInRight 0.6s ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn 0.5s ease-out forwards;
}

.animate-rotate-in {
  animation: rotateIn 0.8s ease-out forwards;
}

.animate-flip-in {
  animation: flipIn 0.8s ease-out forwards;
}

.animate-zoom-in {
  animation: zoomIn 0.6s ease-out forwards;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

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

.animate-shake {
  animation: shake 0.8s ease-in-out;
}

.animate-wiggle {
  animation: wiggle 1s ease-in-out;
}

.animate-rubber-band {
  animation: rubberBand 1s ease-out;
}

.animate-heart-beat {
  animation: heartBeat 1.3s ease-in-out infinite;
}

.animate-floating-slow {
  animation: floatingSlow 6s ease-in-out infinite;
}

.animate-floating-fast {
  animation: floatingFast 3s ease-in-out infinite;
}

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

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

.animate-gradient-shift {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  background-size: 400% 400%;
  animation: gradientShift 8s ease infinite;
}

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

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.hover-grow {
  transition: transform var(--transition-fast);
}

.hover-grow:hover {
  transform: scale(1.05);
}

.hover-shrink {
  transition: transform var(--transition-fast);
}

.hover-shrink:hover {
  transform: scale(0.95);
}

.hover-rotate {
  transition: transform var(--transition-normal);
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

.hover-skew {
  transition: transform var(--transition-normal);
}

.hover-skew:hover {
  transform: skew(-5deg, -2deg);
}

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

.hover-bounce:hover {
  animation: bounce 0.8s ease-out;
}

.hover-pulse:hover {
  animation: pulse 0.8s ease-in-out;
}

.hover-wiggle:hover {
  animation: wiggle 0.8s ease-in-out;
}

.hover-glow:hover {
  animation: glow 1s ease-in-out;
}

/* Button Animations */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

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

.btn-ripple:hover::before {
  width: 300px;
  height: 300px;
}

.btn-gradient-slide {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  background-size: 200% 200%;
  transition: background-position var(--transition-normal);
}

.btn-gradient-slide:hover {
  background-position: right center;
}

.btn-shine {
  position: relative;
  overflow: hidden;
}

.btn-shine::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

.btn-shine:hover::before {
  left: 100%;
}

/* Loading Animations */
.loading-dots {
  display: inline-block;
}

.loading-dots::after {
  content: '';
  animation: loadingDots 1.5s infinite;
}

@keyframes loadingDots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-200);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loading-pulse {
  animation: pulse 1.5s ease-in-out infinite;
}

.loading-bounce {
  display: inline-block;
  animation: bounce 1.4s infinite ease-in-out both;
}

.loading-bounce:nth-child(1) { animation-delay: -0.32s; }
.loading-bounce:nth-child(2) { animation-delay: -0.16s; }

/* Scroll-triggered Animations */
.scroll-animation {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.scroll-animation.animate {
  opacity: 1;
  transform: translateY(0);
}

.scroll-fade-in {
  opacity: 0;
  transition: opacity 1s ease-out;
}

.scroll-fade-in.animate {
  opacity: 1;
}

.scroll-slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.8s ease-out;
}

.scroll-slide-in-left.animate {
  opacity: 1;
  transform: translateX(0);
}

.scroll-slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.8s ease-out;
}

.scroll-slide-in-right.animate {
  opacity: 1;
  transform: translateX(0);
}

.scroll-scale-in {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.6s ease-out;
}

.scroll-scale-in.animate {
  opacity: 1;
  transform: scale(1);
}

/* Stagger Animation Delays */
.animate-stagger:nth-child(1) { animation-delay: 0.1s; }
.animate-stagger:nth-child(2) { animation-delay: 0.2s; }
.animate-stagger:nth-child(3) { animation-delay: 0.3s; }
.animate-stagger:nth-child(4) { animation-delay: 0.4s; }
.animate-stagger:nth-child(5) { animation-delay: 0.5s; }
.animate-stagger:nth-child(6) { animation-delay: 0.6s; }
.animate-stagger:nth-child(7) { animation-delay: 0.7s; }
.animate-stagger:nth-child(8) { animation-delay: 0.8s; }
.animate-stagger:nth-child(9) { animation-delay: 0.9s; }
.animate-stagger:nth-child(10) { animation-delay: 1s; }

/* Counter Animation */
.counter {
  font-variant-numeric: tabular-nums;
  transition: all var(--transition-normal);
}

/* Progress Bar Animation */
.progress-animated {
  position: relative;
  overflow: hidden;
}

.progress-animated::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background-image: linear-gradient(
    -45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%,
    transparent
  );
  background-size: 50px 50px;
  animation: progressMove 2s linear infinite;
}

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

/* Text Animations */
.text-reveal {
  overflow: hidden;
}

.text-reveal span {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  animation: textReveal 0.6s ease-out forwards;
}

@keyframes textReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.typewriter-effect {
  overflow: hidden;
  border-right: 3px solid var(--primary-color);
  white-space: nowrap;
  animation: typewriter 4s steps(40, end), blinkCursor 0.75s step-end infinite;
}

.text-gradient-animate {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  background-size: 400% 400%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

/* Card Hover Effects */
.card-flip {
  perspective: 1000px;
}

.card-flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.card-flip:hover .card-flip-inner {
  transform: rotateY(180deg);
}

.card-flip-front,
.card-flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}

.card-flip-back {
  transform: rotateY(180deg);
}

/* Image Animations */
.image-zoom {
  overflow: hidden;
}

.image-zoom img {
  transition: transform var(--transition-slow);
}

.image-zoom:hover img {
  transform: scale(1.1);
}

.image-rotate {
  transition: transform var(--transition-normal);
}

.image-rotate:hover {
  transform: rotate(5deg);
}

.image-tilt {
  transition: transform var(--transition-normal);
}

.image-tilt:hover {
  transform: perspective(1000px) rotateX(10deg) rotateY(10deg);
}

/* Particle Animation */
.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0.7;
  animation: particleFloat 20s infinite linear;
}

@keyframes particleFloat {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Page Transition */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  z-index: 9999;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s ease-in-out;
}

.page-transition.active {
  transform: scaleY(1);
}

/* Smooth Scrollbar */
.smooth-scroll {
  scroll-behavior: smooth;
}

/* Performance Optimizations */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform, opacity;
}

.optimize-animations {
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Accessibility - Respect 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;
  }

  .typewriter-effect {
    animation: none;
    border-right: none;
    overflow: visible;
  }

  .animate-floating-slow,
  .animate-floating-fast,
  .animate-bounce,
  .animate-pulse,
  .animate-glow,
  .loading-spinner {
    animation: none;
  }
}

/* Dark mode animation adjustments */
@media (prefers-color-scheme: dark) {
  .animate-glow {
    animation: none;
  }

  .btn-shine::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  }
}