/* ============================================================
   Matchic — Animation System v2
   Liquid Glass Motion (from Flutter)
   ============================================================
   
   Design Principles:
   - 250ms default duration (Flutter glassAnimationDuration)
   - easeOutCubic default easing (Flutter glassAnimationCurve)
   - Subtle, purposeful — never gratuitous
   - prefers-reduced-motion fully supported
   
   Animation Categories:
   1. Page Load (hero entrance)
   2. Scroll Reveal (section entry)
   3. Micro-interactions (hover, tap, focus)
   4. Glass Material (shimmer, depth, light)
   5. Ambient (continuous, subtle)
   6. State Transitions (loading, success, error)
   ============================================================ */

/* ============================================================
   1. PAGE LOAD — Hero Entrance Sequence
   ============================================================ */

/* Main orchestrator — applied to body on load */
.page-loaded .hero-content > * {
  animation: hero-entrance var(--duration-slower) var(--ease-out-expo) forwards;
}

.page-loaded .hero-content > *:nth-child(1) { animation-delay: 0.1s; opacity: 0; }
.page-loaded .hero-content > *:nth-child(2) { animation-delay: 0.2s; opacity: 0; }
.page-loaded .hero-content > *:nth-child(3) { animation-delay: 0.3s; opacity: 0; }
.page-loaded .hero-content > *:nth-child(4) { animation-delay: 0.4s; opacity: 0; }
.page-loaded .hero-content > *:nth-child(5) { animation-delay: 0.5s; opacity: 0; }

@keyframes hero-entrance {
  from {
    opacity: 0;
    transform: translateY(30px);
    filter: blur(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

/* Hero image/app mockup entrance */
.page-loaded .hero-visual {
  animation: hero-visual-entrance 1s var(--ease-out-expo) 0.3s forwards;
  opacity: 0;
}

@keyframes hero-visual-entrance {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
    filter: blur(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

/* Floating elements */
.page-loaded .hero-float {
  animation: hero-float-entrance 0.8s var(--ease-out-expo) 0.6s forwards,
             float-gentle 6s ease-in-out 1.4s infinite;
  opacity: 0;
}

@keyframes hero-float-entrance {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes float-gentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ============================================================
   2. SCROLL REVEAL — Section Entry Animations
   ============================================================ */

/* Base reveal state */
.reveal {
  opacity: 0;
  transition: opacity 0.7s var(--ease-out-expo),
              transform 0.7s var(--ease-out-expo);
}

/* Directional reveals */
.reveal-up {
  composes: reveal;
  transform: translateY(40px);
}

.reveal-down {
  composes: reveal;
  transform: translateY(-40px);
}

.reveal-left {
  composes: reveal;
  transform: translateX(-60px);
}

.reveal-right {
  composes: reveal;
  transform: translateX(60px);
}

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

.reveal-scale-up {
  composes: reveal;
  transform: scale(0.9) translateY(30px);
}

/* Revealed state */
.reveal.revealed,
.reveal-up.revealed,
.reveal-down.revealed,
.reveal-left.revealed,
.reveal-right.revealed,
.reveal-scale.revealed,
.reveal-scale-up.revealed {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Stagger delays for children */
.stagger-1 { transition-delay: 0.0s !important; }
.stagger-2 { transition-delay: 0.08s !important; }
.stagger-3 { transition-delay: 0.16s !important; }
.stagger-4 { transition-delay: 0.24s !important; }
.stagger-5 { transition-delay: 0.32s !important; }
.stagger-6 { transition-delay: 0.40s !important; }
.stagger-7 { transition-delay: 0.48s !important; }
.stagger-8 { transition-delay: 0.56s !important; }

/* Auto-stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo);
}

.stagger-children.revealed > *:nth-child(1) { transition-delay: 0.00s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(2) { transition-delay: 0.08s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(3) { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(4) { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(5) { transition-delay: 0.32s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(6) { transition-delay: 0.40s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(7) { transition-delay: 0.48s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(8) { transition-delay: 0.56s; opacity: 1; transform: translateY(0); }

/* ============================================================
   3. MICRO-INTERACTIONS — Hover, Tap, Focus
   ============================================================ */

/* Magnetic hover effect (subtle pull) */
.magnetic-hover {
  transition: transform var(--duration-normal) var(--ease-out-cubic);
}

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

.magnetic-hover:active {
  transform: scale(0.98);
  transition-duration: var(--duration-fast);
}

/* Press feedback */
.press-feedback {
  transition: transform var(--duration-fast) var(--ease-out-cubic),
              box-shadow var(--duration-fast) var(--ease-out-cubic);
}

.press-feedback:active {
  transform: scale(0.96);
}

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

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Focus ring (accessible) */
.focus-ring {
  transition: box-shadow var(--duration-fast) var(--ease-out-cubic);
}

.focus-ring:focus-visible {
  box-shadow: 0 0 0 3px var(--primary-alpha-strong);
}

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

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow-elevated);
}

.hover-lift:active {
  transform: translateY(-1px);
  transition-duration: var(--duration-fast);
}

/* ============================================================
   4. GLASS MATERIAL ANIMATIONS
   ============================================================ */

/* Glass shimmer (light diffusion) */
.glass-shimmer {
  position: relative;
  overflow: hidden;
}

.glass-shimmer::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 30%,
    var(--color-specular-light) 50%,
    transparent 70%
  );
  transform: translateX(-100%) rotate(45deg);
  animation: glass-shimmer 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes glass-shimmer {
  0% { transform: translateX(-100%) rotate(45deg); }
  100% { transform: translateX(100%) rotate(45deg); }
}

/* Glass depth shift on hover */
.glass-depth {
  transition: backdrop-filter var(--duration-normal) var(--ease-out-cubic),
              background var(--duration-normal) var(--ease-out-cubic);
}

.glass-depth:hover {
  backdrop-filter: blur(var(--glass-blur-lg)) saturate(1.3);
  -webkit-backdrop-filter: blur(var(--glass-blur-lg)) saturate(1.3);
  background: var(--surface-high);
}

/* Glass border glow pulse */
.glass-glow {
  animation: glass-glow-pulse 3s ease-in-out infinite;
}

@keyframes glass-glow-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 var(--primary-alpha);
  }
  50% {
    box-shadow: 0 0 0 4px var(--primary-alpha);
  }
}

/* ============================================================
   5. AMBIENT — Continuous Subtle Motion
   ============================================================ */

/* Ambient gradient background */
.ambient-gradient {
  animation: ambient-shift 20s ease-in-out infinite alternate;
}

@keyframes ambient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Floating animation */
.float {
  animation: float 6s ease-in-out infinite;
}

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

.float-fast {
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-6px) rotate(0.5deg); }
  50% { transform: translateY(-10px) rotate(0deg); }
  75% { transform: translateY(-6px) rotate(-0.5deg); }
}

/* Subtle pulse */
.pulse-subtle {
  animation: pulse-subtle 4s ease-in-out infinite;
}

@keyframes pulse-subtle {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Breathing scale */
.breathe {
  animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* Rotating gradient border */
.gradient-border-rotate {
  position: relative;
}

.gradient-border-rotate::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(
    from 0deg,
    var(--primary),
    var(--secondary),
    var(--primary)
  );n  animation: gradient-rotate 4s linear infinite;
  z-index: -1;
}

@keyframes gradient-rotate {
  to { transform: rotate(360deg); }
}

/* ============================================================
   6. STATE TRANSITIONS
   ============================================================ */

/* Loading spinner */
.spin {
  animation: spin 1s linear infinite;
}

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

/* Success checkmark */
.check-draw {
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
  animation: check-draw 0.6s var(--ease-out-expo) forwards;
}

@keyframes check-draw {
  to { stroke-dashoffset: 0; }
}

/* Shake (error feedback) */
.shake {
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* Fade in/out */
.fade-in {
  animation: fade-in var(--duration-normal) var(--ease-out-cubic) forwards;
}

.fade-out {
  animation: fade-out var(--duration-normal) var(--ease-out-cubic) forwards;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Scale pop (for notifications) */
.scale-pop {
  animation: scale-pop 0.4s var(--ease-spring) forwards;
}

@keyframes scale-pop {
  0% { transform: scale(0.5); opacity: 0; }
  70% { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}

/* Slide in from bottom (modal/bottom sheet) */
.slide-up {
  animation: slide-up var(--duration-normal) var(--ease-out-expo) forwards;
}

@keyframes slide-up {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Slide in from top */
.slide-down {
  animation: slide-down var(--duration-normal) var(--ease-out-expo) forwards;
}

@keyframes slide-down {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ============================================================
   7. PARALLAX DEPTH LAYERS
   ============================================================ */

.parallax-layer {
  will-change: transform;
}

.parallax-slow {
  --parallax-speed: 0.3;
}

.parallax-medium {
  --parallax-speed: 0.5;
}

.parallax-fast {
  --parallax-speed: 0.7;
}

/* ============================================================
   8. COUNTDOWN / COUNTER ANIMATION
   ============================================================ */

.count-up {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   ACCESSIBILITY — prefers-reduced-motion
   ============================================================ */

@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;
  }
  
  .page-loaded .hero-content > *,
  .page-loaded .hero-visual,
  .page-loaded .hero-float {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
  
  .reveal,
  .reveal-up,
  .reveal-down,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .reveal-scale-up,
  .stagger-children > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  
  .float,
  .float-slow,
  .float-fast,
  .pulse-subtle,
  .breathe,
  .glass-shimmer::after,
  .glass-glow,
  .gradient-border-rotate::before {
    animation: none !important;
  }
  
  .parallax-layer {
    will-change: auto;
  }
}

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

/* GPU acceleration for animated elements */
.gpu-accelerate {
  transform: translateZ(0);
  will-change: transform, opacity;
}

/* Contain paint for complex animations */
.paint-contain {
  contain: paint;
}

/* Content visibility for off-screen sections */
.content-visibility {
  content-visibility: auto;
  contain-intrinsic-size: 0 500px;
}