/* ========================================
   Animations & Transitions
   Scroll-triggered and hover animations
   ======================================== */

/* ========================================
   Keyframe 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 scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

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

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

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--accent-glow-strong);
  }
}

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

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

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

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

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

/* ========================================
   Scroll-Triggered Animation Classes
   Elements start hidden and animate in
   ======================================== */

/* Base state - hidden */
.animate {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate.animated {
  opacity: 1;
}

/* Fade In */
.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}

.fade-in.animated {
  opacity: 1;
}

/* Fade In Up */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Fade In Down */
.fade-in-down {
  opacity: 0;
  transform: translateY(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-down.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Fade In Left */
.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.animated {
  opacity: 1;
  transform: translateX(0);
}

/* Fade In Right */
.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.animated {
  opacity: 1;
  transform: translateX(0);
}

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Zoom In */
.zoom-in {
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.zoom-in.animated {
  opacity: 1;
  transform: scale(1);
}

/* Blur In */
.blur-in {
  opacity: 0;
  filter: blur(10px);
  transition: opacity 0.6s ease, filter 0.6s ease;
}

.blur-in.animated {
  opacity: 1;
  filter: blur(0);
}

/* ========================================
   Animation Delays
   ======================================== */

.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }
.delay-500 { transition-delay: 500ms; }
.delay-600 { transition-delay: 600ms; }
.delay-700 { transition-delay: 700ms; }
.delay-800 { transition-delay: 800ms; }

/* ========================================
   Animation Durations
   ======================================== */

.duration-fast { transition-duration: 300ms; }
.duration-normal { transition-duration: 600ms; }
.duration-slow { transition-duration: 900ms; }

/* ========================================
   Continuous Animations
   ======================================== */

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

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

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

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

.bounce {
  animation: bounce 2s ease infinite;
}

/* ========================================
   Hover Animations
   ======================================== */

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

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

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

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

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

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

.hover-brightness {
  transition: filter var(--transition-fast);
}

.hover-brightness:hover {
  filter: brightness(1.1);
}

/* ========================================
   Loading States
   ======================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-secondary) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ========================================
   Page Transitions
   ======================================== */

.page-transition-enter {
  opacity: 0;
}

.page-transition-enter-active {
  opacity: 1;
  transition: opacity 300ms ease;
}

.page-transition-exit {
  opacity: 1;
}

.page-transition-exit-active {
  opacity: 0;
  transition: opacity 300ms ease;
}

/* ========================================
   Stagger Children
   Automatically staggers children animations
   ======================================== */

.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.animated > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger-children.animated > *:nth-child(2) { transition-delay: 100ms; opacity: 1; transform: translateY(0); }
.stagger-children.animated > *:nth-child(3) { transition-delay: 200ms; opacity: 1; transform: translateY(0); }
.stagger-children.animated > *:nth-child(4) { transition-delay: 300ms; opacity: 1; transform: translateY(0); }
.stagger-children.animated > *:nth-child(5) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.stagger-children.animated > *:nth-child(6) { transition-delay: 500ms; opacity: 1; transform: translateY(0); }

/* ========================================
   Special Effects
   ======================================== */

/* Gradient text animation */
.gradient-text-animate {
  background: linear-gradient(
    90deg,
    var(--accent),
    #00ff88,
    var(--accent)
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

/* Border glow effect */
.border-glow {
  position: relative;
}

.border-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--accent), #00ff88, var(--accent));
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

/* Ripple effect on click */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  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
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .animate,
  .fade-in,
  .fade-in-up,
  .fade-in-down,
  .fade-in-left,
  .fade-in-right,
  .scale-in,
  .zoom-in,
  .blur-in {
    opacity: 1;
    transform: none;
    filter: none;
  }

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