/**
 * NUGUI Animation Library
 * Reusable animations and transitions
 */

/* ========================================
   TRANSITIONS
   ======================================== */
:root {
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-slower: 0.8s ease;
}

/* ========================================
   KEYFRAME ANIMATIONS
   ======================================== */

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

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-3deg); }
  75% { transform: rotate(3deg); }
}

/* Slide animations */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Loading animations */
@keyframes loading {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

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

/* Bounce animation - Enhanced */
@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    animation-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1.000);
    transform: translate3d(0,0,0);
  }
  40%, 43% {
    animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
    transform: translate3d(0, -30px, 0);
  }
  70% {
    animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0,-4px,0);
  }
}

/* Additional animations from utilities-apple.css */
@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 slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Additional gradient and glow animations */
@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

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

@keyframes tilt {
  0%, 100% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(1deg);
  }
  75% {
    transform: rotate(-1deg);
  }
}

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

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(var(--color-primary-rgb, 0, 162, 232), 0.3);
  }
  50% {
    box-shadow: 0 0 30px rgba(var(--color-primary-rgb, 0, 162, 232), 0.5);
  }
}

/* ========================================
   ANIMATION CLASSES - ENHANCED
   ======================================== */
.animate-fadeIn {
  animation: fadeIn var(--transition-base);
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fadeInDown {
  animation: fadeInDown var(--transition-base);
}

.animate-fadeInLeft {
  animation: fadeInLeft 0.6s ease-out forwards;
}

.animate-fadeInRight {
  animation: fadeInRight 0.6s ease-out forwards;
}

.animate-slideDown {
  animation: slideDown 0.3s ease-out forwards;
}

.animate-scaleIn {
  animation: scaleIn 0.4s ease-out forwards;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

.animate-bounce {
  animation: bounce 1s infinite;
}

.animate-wiggle {
  animation: wiggle 0.5s ease-in-out;
}

.animate-gradient {
  animation: gradientShift 8s ease infinite;
  background-size: 400% 400%;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

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

.animate-shimmer {
  animation: shimmer 2s linear infinite;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  background-size: 200% 100%;
}

/* Animation delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-500 { animation-delay: 0.5s; }
.delay-700 { animation-delay: 0.7s; }

/* ========================================
   HOVER ANIMATIONS
   ======================================== */
.hover-lift {
  transition: transform var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-grow {
  transition: transform var(--transition-base);
}

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

.hover-shrink {
  transition: transform var(--transition-base);
}

.hover-shrink:hover {
  transform: scale(0.95);
}

.hover-rotate {
  transition: transform var(--transition-base);
}

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

/* ========================================
   LOADING STATES
   ======================================== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface) 25%,
    var(--color-surface-secondary) 50%,
    var(--color-surface) 75%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

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

/* ========================================
   TRANSITION UTILITIES
   ======================================== */
.transition-all {
  transition: all var(--transition-base);
}

.transition-colors {
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base);
}

.transition-transform {
  transition: transform var(--transition-base);
}

.transition-opacity {
  transition: opacity var(--transition-base);
}

.transition-none {
  transition: none !important;
}

/* ========================================
   ACCESSIBILITY RESPECT
   ======================================== */
@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;
  }
  
  .animate-gradient,
  .animate-float,
  .animate-glow,
  .animate-shimmer {
    animation: none !important;
  }
}

/* ========================================
   PERFORMANCE OPTIMIZATIONS
   ======================================== */
.will-change-transform {
  will-change: transform;
}

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

.backface-hidden {
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.gpu-accelerated {
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}