/**
 * Animation Library - Haverford IFL
 * Reusable animations and micro-interactions
 */

/* ========== Keyframe Animations ========== */

/* Page Enter Animation */
@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered Fade In */
@keyframes staggerFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Fade In Up */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Down */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Left */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fade In Right */
@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* Slide Up */
@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Slide Down */
@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

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

/* Pulse */
@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
}

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

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

/* Enhanced Shimmer for Skeletons */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Dot Pulse for Loading */
@keyframes dotPulse {
  0%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
}

/* Number Count Animation */
@keyframes countUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Glow Pulse */
@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 5px rgba(103, 0, 0, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(103, 0, 0, 0.6);
  }
}

/* Progress Bar */
@keyframes progressBar {
  from { width: 0; }
  to { width: var(--progress-width, 100%); }
}

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

/* Page Animation */
.animate-page {
  animation: pageEnter 0.5s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

/* Fade Animations */
.animate-fadeIn {
  animation: fadeIn 0.3s ease forwards;
}

.animate-fadeInUp {
  animation: fadeInUp 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

.animate-fadeInDown {
  animation: fadeInDown 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

.animate-fadeInLeft {
  animation: fadeInLeft 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

.animate-fadeInRight {
  animation: fadeInRight 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

/* Scale Animation */
.animate-scaleIn {
  animation: scaleIn 0.3s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

/* Slide Animations */
.animate-slideUp {
  animation: slideUp 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

.animate-slideDown {
  animation: slideDown 0.4s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

/* Bounce */
.animate-bounce {
  animation: bounce 1s ease infinite;
}

/* Pulse */
.animate-pulse {
  animation: pulse 2s ease infinite;
}

/* Shake */
.animate-shake {
  animation: shake 0.5s ease;
}

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

/* Glow */
.animate-glow {
  animation: glowPulse 2s ease infinite;
}

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

.stagger-item {
  opacity: 0;
  animation: staggerFadeIn 0.5s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.05s; }
.stagger-item:nth-child(2) { animation-delay: 0.1s; }
.stagger-item:nth-child(3) { animation-delay: 0.15s; }
.stagger-item:nth-child(4) { animation-delay: 0.2s; }
.stagger-item:nth-child(5) { animation-delay: 0.25s; }
.stagger-item:nth-child(6) { animation-delay: 0.3s; }
.stagger-item:nth-child(7) { animation-delay: 0.35s; }
.stagger-item:nth-child(8) { animation-delay: 0.4s; }
.stagger-item:nth-child(9) { animation-delay: 0.45s; }
.stagger-item:nth-child(10) { animation-delay: 0.5s; }
.stagger-item:nth-child(11) { animation-delay: 0.55s; }
.stagger-item:nth-child(12) { animation-delay: 0.6s; }

/* ========== Hover Effects ========== */

/* Hover Lift */
.hover-lift {
  transition: transform 0.3s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)),
              box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover, 0 8px 30px rgba(0, 0, 0, 0.12));
}

/* Hover Scale */
.hover-scale {
  transition: transform 0.3s var(--ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1));
}

.hover-scale:hover {
  transform: scale(1.03);
}

/* Hover Scale Subtle */
.hover-scale-sm {
  transition: transform 0.2s ease;
}

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

/* Hover Grow */
.hover-grow {
  transition: transform 0.3s var(--ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1));
}

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

/* Hover Rotate */
.hover-rotate {
  transition: transform 0.3s ease;
}

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

/* Hover Glow Maroon */
.hover-glow-maroon {
  transition: box-shadow 0.3s ease;
}

.hover-glow-maroon:hover {
  box-shadow: var(--shadow-glow-maroon, 0 0 20px rgba(103, 0, 0, 0.25));
}

/* Hover Glow Gold */
.hover-glow-gold {
  transition: box-shadow 0.3s ease;
}

.hover-glow-gold:hover {
  box-shadow: var(--shadow-glow-gold, 0 0 20px rgba(212, 175, 55, 0.3));
}

/* ========== Button Effects ========== */

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

.btn-ripple::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 10%, transparent 10%);
  transform: scale(10);
  opacity: 0;
  transition: transform 0.5s, opacity 0.5s;
  pointer-events: none;
}

.btn-ripple:active::after {
  transform: scale(0);
  opacity: 1;
  transition: 0s;
}

/* Button Press Effect */
.btn-press {
  transition: transform 0.15s ease;
}

.btn-press:active {
  transform: scale(0.97);
}

/* Button Shine Effect */
.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, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

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

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

/* Skeleton Shimmer */
.skeleton-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-gray-100, #f3f3f3) 25%,
    var(--color-gray-200, #e9ecef) 50%,
    var(--color-gray-100, #f3f3f3) 75%
  );
  background-size: 400% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

/* Loading Dots */
.loading-dots {
  display: inline-flex;
  gap: 6px;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background: var(--color-maroon, #670000);
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

/* ========== Number/Stat Counter ========== */

.stat-counter {
  overflow: hidden;
}

.stat-counter-value {
  display: inline-block;
  animation: countUp 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)) forwards;
}

/* ========== Transition Delays ========== */

.delay-100 { animation-delay: 100ms; transition-delay: 100ms; }
.delay-200 { animation-delay: 200ms; transition-delay: 200ms; }
.delay-300 { animation-delay: 300ms; transition-delay: 300ms; }
.delay-400 { animation-delay: 400ms; transition-delay: 400ms; }
.delay-500 { animation-delay: 500ms; transition-delay: 500ms; }
.delay-600 { animation-delay: 600ms; transition-delay: 600ms; }
.delay-700 { animation-delay: 700ms; transition-delay: 700ms; }
.delay-800 { animation-delay: 800ms; transition-delay: 800ms; }
.delay-900 { animation-delay: 900ms; transition-delay: 900ms; }
.delay-1000 { animation-delay: 1000ms; transition-delay: 1000ms; }

/* ========== Animation Duration Modifiers ========== */

.duration-fast { animation-duration: 150ms; }
.duration-normal { animation-duration: 300ms; }
.duration-slow { animation-duration: 500ms; }
.duration-slower { animation-duration: 700ms; }

/* ========== Animation Fill Modes ========== */

.fill-forwards { animation-fill-mode: forwards; }
.fill-backwards { animation-fill-mode: backwards; }
.fill-both { animation-fill-mode: both; }

/* ========== Scroll Reveal (requires JS to add .is-visible class) ========== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)),
              transform 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1));
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)),
              transform 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1));
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)),
              transform 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1));
}

.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1)),
              transform 0.6s var(--ease-out-expo, cubic-bezier(0.19, 1, 0.22, 1));
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}