/**
 * Skeleton Loading States and Micro-Interactions
 * Beautiful loading experiences and animations
 */

/* Skeleton Base */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
}

[data-theme="light"] .skeleton {
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.05) 0%,
    rgba(0, 0, 0, 0.1) 50%,
    rgba(0, 0, 0, 0.05) 100%
  );
  background-size: 200% 100%;
}

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

/* Skeleton Variants */
.skeleton-text {
  height: 1rem;
  margin-bottom: 0.5rem;
}

.skeleton-text-lg {
  height: 1.5rem;
  margin-bottom: 0.75rem;
}

.skeleton-title {
  height: 2rem;
  width: 60%;
  margin-bottom: 1rem;
}

.skeleton-card {
  height: 200px;
  width: 100%;
  margin-bottom: 1rem;
}

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

.skeleton-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
}

/* Loading Spinner */
.loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-top-color: rgba(59, 130, 246, 1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.loading-spinner-lg {
  width: 60px;
  height: 60px;
  border-width: 6px;
}

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Fade In Animation */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

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

/* Slide Up Animation */
.slide-up {
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Scale Animation */
.scale-in {
  animation: scaleIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(3, 3, 8, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.loading-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.loading-text {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  font-size: 1.125rem;
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, rgba(59, 130, 246, 1) 0%, rgba(147, 51, 234, 1) 100%);
  border-radius: 2px;
  transition: width 0.3s ease;
  animation: progress-shimmer 2s ease-in-out infinite;
}

@keyframes progress-shimmer {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
  100% {
    opacity: 1;
  }
}

/* Skeleton Grid Layout */
.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}

/* Lazy Load Image */
.lazy-image {
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.lazy-image.loaded {
  opacity: 1;
}

.lazy-image-wrapper {
  position: relative;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.lazy-image-wrapper::before {
  content: '';
  display: block;
  padding-top: 56.25%; /* 16:9 aspect ratio */
}

.lazy-image-wrapper img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Micro-Interactions */
.interactive {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.interactive:hover {
  transform: translateY(-2px);
}

.interactive:active {
  transform: translateY(0);
}

/* Button Loading State */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Tooltip */
.tooltip {
  position: absolute;
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.tooltip.show {
  opacity: 1;
}

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

.ripple::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 0.6s ease, height 0.6s ease;
}

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

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .loading-spinner,
  .pulse,
  .fade-in,
  .slide-up,
  .scale-in,
  .ripple::before {
    animation: none !important;
    transition: none !important;
  }
}