/* ==========================================================================
   Animation Keyframes & Classes
   ========================================================================== */

/* ==========================================================================
   Keyframes
   ========================================================================== */

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

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* Slide animations */
@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

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

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

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

/* Bounce */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: translateY(-25%);
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}

@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);
  }
}

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

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

/* Float effect */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

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

/* Glow effect */
@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--color-accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--color-accent-glow), 0 0 60px var(--color-accent-glow);
  }
}

@keyframes textGlow {
  0%, 100% {
    text-shadow: 0 0 20px var(--color-accent-glow);
  }
  50% {
    text-shadow: 0 0 40px var(--color-accent-glow), 0 0 60px var(--color-accent-glow);
  }
}

/* Gradient shift */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

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

/* Typewriter cursor */
@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* Line draw */
@keyframes drawLine {
  from {
    stroke-dashoffset: 1000;
  }
  to {
    stroke-dashoffset: 0;
  }
}

/* Reveal mask */
@keyframes revealMask {
  from {
    clip-path: inset(0 100% 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

/* Counter number animation */
@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Marquee / Infinite scroll */
@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@keyframes marqueeReverse {
  from {
    transform: translateX(-50%);
  }
  to {
    transform: translateX(0);
  }
}

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

/* Underline grow */
@keyframes underlineGrow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* Stagger helper - use with animation-delay */
@keyframes staggerFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Background patterns */
@keyframes patternMove {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 100px 100px;
  }
}

/* Blob morph */
@keyframes blobMorph {
  0%, 100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  50% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
}

/* Parallax scroll indicator */
@keyframes scrollIndicator {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 0;
    transform: translateY(20px);
  }
}

/* ==========================================================================
   Animation Classes
   ========================================================================== */

/* Base animation class */
.animated {
  animation-duration: var(--duration-slow);
  animation-fill-mode: both;
}

.animated.fast {
  animation-duration: var(--duration-fast);
}

.animated.slow {
  animation-duration: var(--duration-slower);
}

.animated.slower {
  animation-duration: var(--duration-slowest);
}

/* Animation types */
.fade-in { animation-name: fadeIn; }
.fade-out { animation-name: fadeOut; }
.fade-in-up { animation-name: fadeInUp; }
.fade-in-down { animation-name: fadeInDown; }
.fade-in-left { animation-name: fadeInLeft; }
.fade-in-right { animation-name: fadeInRight; }
.scale-in { animation-name: scaleIn; }
.scale-up { animation-name: scaleUp; }
.slide-in-up { animation-name: slideInUp; }
.slide-in-down { animation-name: slideInDown; }
.slide-in-left { animation-name: slideInLeft; }
.slide-in-right { animation-name: slideInRight; }
.bounce-in { animation-name: bounceIn; }

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

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

.animate-spin-slow {
  animation: spinSlow 8s linear infinite;
}

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

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

.animate-float-slow {
  animation: floatSlow 8s ease-in-out infinite;
}

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

.animate-gradient {
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

.animate-marquee {
  animation: marquee 30s linear infinite;
}

.animate-marquee-reverse {
  animation: marqueeReverse 30s linear infinite;
}

.animate-blob {
  animation: blobMorph 8s ease-in-out infinite;
}

/* ==========================================================================
   Scroll Reveal Classes (Applied by JS)
   ========================================================================== */

/* Initial hidden state */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.from-left {
  transform: translateX(-50px);
}

.reveal.from-right {
  transform: translateX(50px);
}

.reveal.from-bottom {
  transform: translateY(50px);
}

.reveal.scale {
  transform: scale(0.9);
}

/* Revealed state */
.reveal.revealed {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Stagger delays for children */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 300ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 400ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 500ms; }
.reveal-stagger > *:nth-child(7) { transition-delay: 600ms; }
.reveal-stagger > *:nth-child(8) { transition-delay: 700ms; }
.reveal-stagger > *:nth-child(9) { transition-delay: 800ms; }
.reveal-stagger > *:nth-child(10) { transition-delay: 900ms; }

/* ==========================================================================
   Hover Animation Utilities
   ========================================================================== */

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

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

/* Hover scale */
.hover-scale {
  transition: transform var(--duration-normal) var(--ease-out);
}

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

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

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

/* Hover border glow */
.hover-border-glow {
  position: relative;
  transition: border-color var(--duration-normal) var(--ease-out);
}

.hover-border-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient-accent);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.hover-border-glow:hover::before {
  opacity: 1;
}

/* Underline animation on hover */
.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out);
}

.hover-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* 3D tilt effect (controlled by JS) */
.tilt-card {
  transform-style: preserve-3d;
  transition: transform var(--duration-fast) var(--ease-out);
}

.tilt-card .tilt-content {
  transform: translateZ(30px);
}