/* ===== LOADING STATES & ANIMATIONS ===== */

/* Skeleton Loader Base */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(0, 102, 255, 0.05) 0%,
    rgba(0, 255, 255, 0.1) 50%,
    rgba(0, 102, 255, 0.05) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

/* Skeleton Variants */
.skeleton-text {
  height: 1em;
  margin: 0.5rem 0;
}

.skeleton-text.short {
  width: 40%;
}

.skeleton-text.medium {
  width: 60%;
}

.skeleton-text.long {
  width: 80%;
}

.skeleton-heading {
  height: 2rem;
  width: 60%;
  margin: 1rem 0;
}

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

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-md);
}

.skeleton-stat {
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.08), rgba(0, 255, 255, 0.04));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
  min-height: 80px;
}

/* Skeleton Dashboard Stats */
.skeleton-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 1rem;
}

@media (max-width: 992px) {
  .skeleton-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Skeleton Giveaway Card */
.skeleton-giveaway-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  animation: pulse 2s infinite;
}

.skeleton-giveaway-image {
  height: 200px;
  background: linear-gradient(
    90deg,
    rgba(0, 102, 255, 0.08) 0%,
    rgba(0, 255, 255, 0.15) 50%,
    rgba(0, 102, 255, 0.08) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.skeleton-giveaway-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

/* Spinner */
.spinner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  gap: 1rem;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(0, 102, 255, 0.1);
  border-top: 4px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.spinner-lg {
  width: 64px;
  height: 64px;
  border-width: 5px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* SVG Loaders - Modern animated spinners */
.svg-loader {
  display: inline-block;
}

.svg-loader svg {
  display: block;
}

.svg-loader path {
  fill: var(--accent-primary, #8b5cf6);
}

.svg-loader-sm svg { width: 24px; height: 24px; }
.svg-loader-md svg { width: 40px; height: 40px; }
.svg-loader-lg svg { width: 56px; height: 56px; }

/* Loader type: circular */
.svg-loader-circular path:first-child {
  opacity: 0.2;
}

/* Loader type: bars */
.svg-loader-bars rect {
  fill: var(--accent-primary, #8b5cf6);
}

/* Loader type: dots (pulse effect) */
.svg-loader-dots rect {
  fill: var(--accent-primary, #8b5cf6);
}

/* Button Loading State */
.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-loading .btn-text {
  opacity: 0;
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 4px;
  background: rgba(0, 102, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
  transition: width 0.3s ease;
  position: relative;
  overflow: hidden;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: progress-shimmer 1.5s infinite;
}

@keyframes progress-shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Indeterminate Progress */
.progress-bar.indeterminate .progress-bar-fill {
  width: 40% !important;
  animation: indeterminate 1.5s infinite;
}

@keyframes indeterminate {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(350%);
  }
}

/* Skeleton List Items */
.skeleton-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skeleton-list-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(0, 255, 255, 0.02));
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

/* Shimmer Effect Overlay */
.shimmer-wrapper {
  position: relative;
  overflow: hidden;
}

.shimmer-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 255, 255, 0.2),
    transparent
  );
  animation: shimmer-slide 2s infinite;
}

@keyframes shimmer-slide {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Loading Text Animation */
.loading-text {
  display: inline-block;
  color: var(--text-secondary);
}

.loading-text::after {
  content: '';
  animation: loading-dots 1.5s steps(4) infinite;
}

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

/* Fade In Animation */
.fade-in {
  animation: fadeIn 0.3s ease-in;
}

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

/* Skeleton Leaderboard */
.skeleton-leaderboard-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(0, 255, 255, 0.02));
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.skeleton-leaderboard-item .skeleton-position {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.skeleton-leaderboard-item .skeleton-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Empty State Improvements */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.empty-state-description {
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.empty-state-action {
  display: inline-block;
  margin-top: 1rem;
}

/* Error State */
.error-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--accent-danger);
}

.error-state-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.error-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.error-state-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Content Loading State */
.content-loading {
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Disable interactions during loading */
.is-loading {
  pointer-events: none;
  opacity: 0.6;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading state for specific components */
.dashboard-card.loading {
  position: relative;
  min-height: 200px;
}

.giveaway-card.loading {
  position: relative;
  min-height: 400px;
}

/* Skeleton notification */
.skeleton-notification {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(0, 255, 255, 0.02));
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.skeleton-notification-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-notification-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}