/**
 * MomEase Animations - Production Grade Animation System
 *
 * Architecture: BEM methodology for maintainability
 * Performance: GPU-accelerated transforms, will-change hints
 * Accessibility: Full prefers-reduced-motion support
 *
 * @author MomEase Team
 * @version 1.0.0
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
  /* Animation Timing - More dramatic */
  --ease-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-enter: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-exit: cubic-bezier(0.4, 0.0, 1, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-dramatic: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Duration - Slower for more noticeable animations */
  --duration-fast: 300ms;
  --duration-normal: 600ms;
  --duration-slow: 900ms;
  --duration-slower: 1200ms;

  /* Delays for stagger effects - More spaced */
  --delay-1: 150ms;
  --delay-2: 300ms;
  --delay-3: 450ms;
  --delay-4: 600ms;

  /* Transform distances - Larger movements */
  --translate-distance: 100px;
  --translate-distance-sm: 50px;
}

/* ============================================
   ACCESSIBILITY: Reduced Motion Support
   ============================================ */
@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;
  }

  /* Disable parallax and complex transforms */
  .parallax,
  .float,
  .hover-tilt {
    transform: none !important;
  }
}

/* ============================================
   BASE ANIMATION UTILITIES
   ============================================ */

/* GPU Acceleration Hint - Applied to animated elements */
.will-animate {
  will-change: transform, opacity;
}

.will-animate-complete {
  will-change: auto;
}

/* ============================================
   FADE ANIMATIONS
   ============================================ */

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

.anim-fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-smooth) forwards;
}

/* Fade In Up - Premium entrance animation with dramatic effect */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(var(--translate-distance)) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.anim-fade-in-up {
  animation: fadeInUp var(--duration-slow) var(--ease-dramatic) forwards;
  opacity: 0;
}

/* Fade In Down */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(calc(-1 * var(--translate-distance)));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.anim-fade-in-down {
  animation: fadeInDown var(--duration-slow) var(--ease-smooth) forwards;
  opacity: 0;
}

/* Fade In Scale - Used for images */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.anim-fade-in-scale {
  animation: fadeInScale var(--duration-slower) var(--ease-smooth) forwards;
  opacity: 0;
}

/* ============================================
   SCROLL-TRIGGERED ANIMATIONS
   ============================================ */

/* Base state for scroll animations - invisible until triggered */
.scroll-reveal {
  opacity: 0;
  transform: translateY(var(--translate-distance-sm));
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

.scroll-reveal--active {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll Reveal from Left */
.scroll-reveal--left {
  opacity: 0;
  transform: translateX(calc(-1 * var(--translate-distance)));
}

.scroll-reveal--left.scroll-reveal--active {
  opacity: 1;
  transform: translateX(0);
}

/* Scroll Reveal from Right */
.scroll-reveal--right {
  opacity: 0;
  transform: translateX(var(--translate-distance));
}

.scroll-reveal--right.scroll-reveal--active {
  opacity: 1;
  transform: translateX(0);
}

/* Scroll Reveal Scale */
.scroll-reveal--scale {
  opacity: 0;
  transform: scale(0.95);
}

.scroll-reveal--scale.scroll-reveal--active {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
   STAGGER ANIMATIONS (For sequential reveals)
   ============================================ */

.stagger-item {
  opacity: 0;
  transform: translateY(var(--translate-distance-sm));
}

.stagger-item--1 { transition-delay: var(--delay-1); }
.stagger-item--2 { transition-delay: var(--delay-2); }
.stagger-item--3 { transition-delay: var(--delay-3); }
.stagger-item--4 { transition-delay: var(--delay-4); }

.stagger-item.stagger-item--active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

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

/* Button Hover - More dramatic lift effect with shimmer */
.btn-hover {
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth);
}

.btn-hover::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s ease;
}

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

.btn-hover:hover {
  transform: translateY(-6px) scale(1.05);
  box-shadow: 0 15px 35px rgba(236, 72, 153, 0.5),
              0 0 20px rgba(255, 69, 177, 0.3);
}

.btn-hover:active {
  transform: translateY(-2px) scale(1.02);
}

/* Card Hover - More dramatic lift with shadow */
.card-hover {
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
}

.card-hover:hover {
  transform: translateY(-16px) scale(1.03);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
}

/* Image Hover - More noticeable scale */
.image-hover {
  overflow: hidden;
  position: relative;
}

.image-hover img {
  transition: transform var(--duration-slow) var(--ease-smooth);
  will-change: transform;
}

.image-hover:hover img {
  transform: scale(1.15) rotate(2deg);
}

/* Hover Tilt Effect - Premium 3D tilt */
.hover-tilt {
  transition: transform var(--duration-normal) var(--ease-smooth);
  transform-style: preserve-3d;
}

/* ============================================
   FLOATING ANIMATIONS
   ============================================ */

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-30px);
  }
}

.anim-float {
  animation: float 2.5s var(--ease-smooth) infinite;
}

.anim-float--slow {
  animation: float 3.5s var(--ease-smooth) infinite;
}

/* Floating with rotation - For decorative elements */
@keyframes floatRotate {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

.anim-float-rotate {
  animation: floatRotate 4s var(--ease-smooth) infinite;
}

/* ============================================
   PULSE ANIMATIONS
   ============================================ */

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

.anim-pulse {
  animation: pulse 2s var(--ease-smooth) infinite;
}

/* Subtle pulse for attention */
@keyframes pulseSubtle {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

.anim-pulse-subtle {
  animation: pulseSubtle 2s var(--ease-smooth) infinite;
}

/* ============================================
   PARALLAX EFFECTS (Applied via JS)
   ============================================ */

.parallax {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

/* ============================================
   LOADING & SHIMMER EFFECTS
   ============================================ */

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.loading-shimmer {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.4) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ============================================
   GRADIENT ANIMATIONS
   ============================================ */

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

.anim-gradient {
  background-size: 200% 200%;
  animation: gradientShift 8s var(--ease-smooth) infinite;
}

/* ============================================
   TEXT REVEAL ANIMATIONS
   ============================================ */

/* Character-by-character reveal (applied via JS) */
.text-reveal {
  overflow: hidden;
}

.text-reveal__char {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-normal) var(--ease-smooth),
              transform var(--duration-normal) var(--ease-smooth);
}

.text-reveal__char--active {
  opacity: 1;
  transform: translateY(0);
}

/* Word-by-word reveal */
.text-reveal__word {
  display: inline-block;
  opacity: 0;
  transform: translateY(10px);
}

.text-reveal__word--active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

/* ============================================
   NAVBAR ANIMATIONS
   ============================================ */

/* Navbar scroll effect */
.nav-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  transition: background-color var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
}

/* Navbar link hover effect */
.nav-link {
  position: relative;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width var(--duration-normal) var(--ease-smooth);
}

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

/* ============================================
   MODAL & OVERLAY ANIMATIONS
   ============================================ */

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

@keyframes slideUpModal {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.overlay-enter {
  animation: fadeInOverlay var(--duration-normal) var(--ease-smooth) forwards;
}

.modal-enter {
  animation: slideUpModal var(--duration-slow) var(--ease-bounce) forwards;
}

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

/* Delay utilities */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Duration utilities */
.duration-fast { animation-duration: var(--duration-fast); }
.duration-normal { animation-duration: var(--duration-normal); }
.duration-slow { animation-duration: var(--duration-slow); }

/* Transform origin utilities */
.origin-center { transform-origin: center; }
.origin-top { transform-origin: top; }
.origin-bottom { transform-origin: bottom; }

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

/* Prevent layout shifts during animations */
.prevent-layout-shift {
  contain: layout;
}

/* Optimize repaints */
.optimize-repaint {
  backface-visibility: hidden;
  perspective: 1000px;
}

/* ============================================
   ICON ANIMATIONS
   ============================================ */

/* Pulse icon on card hover */
.card-hover svg {
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.card-hover:hover svg {
  transform: scale(1.2) rotate(5deg);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

/* Bounce animation for icons */
@keyframes iconBounce {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-10px) scale(1.1);
  }
}

.icon-bounce {
  animation: iconBounce 2s ease-in-out infinite;
}

/* ============================================
   TEXT GLOW EFFECTS
   ============================================ */

.text-glow {
  text-shadow: 0 0 20px rgba(255, 69, 177, 0.5),
               0 0 40px rgba(255, 69, 177, 0.3);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  :root {
    --translate-distance: 60px;
    --translate-distance-sm: 30px;
  }

  /* Reduce animation complexity on mobile */
  .hover-tilt {
    transform: none !important;
  }

  /* Adjust hover effects on touch devices */
  .card-hover:hover {
    transform: translateY(-8px) scale(1.02);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  /* Disable all animations for print */
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}