/* Animations & Transitions */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@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); }
}

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

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

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
  40%, 43% { transform: translate3d(0, -8px, 0); }
  70% { transform: translate3d(0, -4px, 0); }
  90% { transform: translate3d(0, -2px, 0); }
}

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

.fade-in { animation: fadeIn 0.4s ease forwards; }
.slide-up { animation: slideUp 0.5s ease forwards; }
.slide-down { animation: slideDown 0.4s ease forwards; }
.slide-in-right { animation: slideInRight 0.5s ease forwards; }
.scale-in { animation: scaleIn 0.3s ease forwards; }
.pulse { animation: pulse 2s infinite; }
.shimmer { animation: shimmer 1.5s infinite; }
.spin { animation: spin 1s linear infinite; }
.bounce { animation: bounce 1s infinite; }
.float { animation: float 3s ease-in-out infinite; }

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }
.stagger-7 { animation-delay: 0.7s; }
.stagger-8 { animation-delay: 0.8s; }

/* Hover animations */
.hover-lift {
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

/* Loading states */
.skeleton {
  background: linear-gradient(90deg, var(--color-background) 25%, var(--color-border) 50%, var(--color-background) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--spacing);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton-title {
  height: 1.5rem;
  width: 60%;
  margin-bottom: var(--spacing);
}

.skeleton-price {
  height: 1.5rem;
  width: 40%;
}

/* Page transitions */
.page-enter {
  opacity: 0;
  transform: translateY(20px);
}
.page-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* Button animations */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease;
}

.btn:active::before {
  width: 300px;
  height: 300px;
  transition: width 0s, height 0s;
}

/* Card hover effects */
.product-card {
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-card-image img {
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-image img {
  transform: scale(1.08);
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Focus visible */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 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;
  }
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-background);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text);
}

/* Selection */
::selection {
  background: var(--color-primary);
  color: white;
}

/* Input focus */
input:focus, select:focus, textarea:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* Image lazy loading */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s ease;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Modal/overlay */
.modal-overlay {
  animation: fadeIn 0.2s ease forwards;
}

.modal-content {
  animation: scaleIn 0.3s ease forwards;
}

/* Dropdown */
.dropdown-menu {
  animation: slideDown 0.2s ease forwards;
}

/* Tooltip */
.tooltip {
  animation: fadeIn 0.2s ease forwards;
}