/* ===========================
   Animation Keyframes
   =========================== */

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

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

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

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

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translateY(0);
  }
  40%, 43% {
    transform: translateY(-10px);
  }
  70% {
    transform: translateY(-5px);
  }
  90% {
    transform: translateY(-2px);
  }
}

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

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px var(--primary-300);
  }
  50% {
    box-shadow: 0 0 20px var(--primary-400), 0 0 30px var(--primary-300);
  }
}

@keyframes progressPulse {
  0%, 100% {
    background: linear-gradient(90deg, var(--primary-500), var(--primary-400));
  }
  50% {
    background: linear-gradient(90deg, var(--primary-400), var(--primary-300));
  }
}

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

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

.animate-fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

.animate-slide-up {
  animation: slideUp 0.3s ease-out;
}

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

.animate-slide-in-left {
  animation: slideInLeft 0.3s ease-out;
}

.animate-slide-in-right {
  animation: slideInRight 0.3s ease-out;
}

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

.animate-pulse {
  animation: pulse 2s infinite;
}

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

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

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

/* ===========================
   Hover Animations
   =========================== */

.hover-lift {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: transform var(--transition-fast);
}

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

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

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

.hover-glow {
  transition: box-shadow var(--transition-fast);
}

.hover-glow:hover {
  box-shadow: 0 0 20px var(--primary-200);
}

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

.loading-skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: loading-skeleton 1.5s infinite;
}

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

.loading-dots::after {
  content: '';
  animation: loading-dots 1.5s infinite;
}

@keyframes loading-dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

/* ===========================
   Progress Animations
   =========================== */

.progress-fill {
  background: linear-gradient(90deg, var(--primary-500), var(--primary-400));
  animation: progressPulse 2s ease-in-out infinite;
}

.progress-fill.complete {
  background: linear-gradient(90deg, var(--success-500), var(--success-400));
  animation: none;
}

/* ===========================
   Micro-interactions
   =========================== */

.button-press {
  transition: transform 0.1s ease;
}

.button-press:active {
  transform: scale(0.98);
}

.icon-bounce {
  transition: transform var(--transition-fast);
}

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

.card-flip {
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.card-flip.flipped {
  transform: rotateY(180deg);
}

.ripple-effect {
  position: relative;
  overflow: hidden;
}

.ripple-effect::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.ripple-effect:active::before {
  width: 300px;
  height: 300px;
}

/* ===========================
   Stagger Animations
   =========================== */

.stagger-fade-in > * {
  opacity: 0;
  animation: fadeInUp 0.5s ease-out forwards;
}

.stagger-fade-in > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-fade-in > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-fade-in > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-fade-in > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-fade-in > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-fade-in > *:nth-child(6) { animation-delay: 0.6s; }
.stagger-fade-in > *:nth-child(7) { animation-delay: 0.7s; }
.stagger-fade-in > *:nth-child(8) { animation-delay: 0.8s; }
.stagger-fade-in > *:nth-child(9) { animation-delay: 0.9s; }
.stagger-fade-in > *:nth-child(10) { animation-delay: 1.0s; }

/* ===========================
   Reduced Motion
   =========================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .loading-spinner i {
    animation: none;
  }

  .progress-fill {
    animation: none;
  }
}

/* ===========================
   Performance Optimizations
   =========================== */

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

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

.gpu-acceleration {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}