/* ===================================
   ANIMATIONS & TRANSITIONS
   =================================== */

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

/* Fade in up animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade in down animation */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Slide in from left */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide in from right */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Bounce animation */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Pulse animation */
@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Shimmer animation for loading states */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

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

/* ===================================
   ANIMATION UTILITY CLASSES
   =================================== */

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

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

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

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

.animate-slide-in-left {
  animation: slideInLeft 0.7s ease-out forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.7s ease-out forwards;
}

/* Stagger delays for sequential animations */
.animate-delay-1 {
  animation-delay: 0.1s;
}

.animate-delay-2 {
  animation-delay: 0.2s;
}

.animate-delay-3 {
  animation-delay: 0.3s;
}

.animate-delay-4 {
  animation-delay: 0.4s;
}

.animate-delay-5 {
  animation-delay: 0.5s;
}

/* Initial state for scroll animations */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ===================================
   HOVER & INTERACTION EFFECTS
   =================================== */

/* Smooth lift effect */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

/* Glow effect on hover */
.hover-glow {
  position: relative;
  transition: all var(--transition-base);
}

.hover-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: var(--color-primary-gradient);
  opacity: 0;
  z-index: -1;
  filter: blur(8px);
  transition: opacity var(--transition-base);
}

.hover-glow:hover::after {
  opacity: 0.6;
}

/* Subtle scale on hover */
.hover-scale {
  transition: transform var(--transition-fast);
}

.hover-scale:hover {
  transform: scale(1.02);
}

/* Card flip effect */
.card-3d {
  transform-style: preserve-3d;
  transition: transform var(--transition-base);
}

.card-3d:hover {
  transform: perspective(1000px) rotateX(2deg) rotateY(-2deg);
}

/* ===================================
   LOADING STATES
   =================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 0%,
    rgba(255, 255, 255, 0.8) 50%,
    var(--color-bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ===================================
   SCROLL REVEAL ANIMATIONS
   =================================== */

/* Apply to sections for scroll-triggered animations */
.section {
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

/* Stagger section animations */
.section:nth-child(1) {
  animation-delay: 0.1s;
}

.section:nth-child(2) {
  animation-delay: 0.2s;
}

.section:nth-child(3) {
  animation-delay: 0.3s;
}

.section:nth-child(4) {
  animation-delay: 0.4s;
}

/* ===================================
   MICRO-INTERACTIONS
   =================================== */

/* Button ripple effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.ripple:active::after {
  width: 300px;
  height: 300px;
}

/* Icon bounce on hover */
.icon-bounce {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.icon-bounce:hover {
  animation: bounce 0.6s ease;
}

/* Underline grow effect for links */
.link-underline {
  position: relative;
  text-decoration: none;
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width var(--transition-base);
}

.link-underline:hover::after {
  width: 100%;
}

/* ===================================
   PERFORMANCE OPTIMIZATIONS
   =================================== */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scroll-animate {
    opacity: 1;
    transform: none;
  }
}