/* ============================================
   LOADING STATES & ANIMATIONS
   Styles pour spinners, skeletons, etc.
   ============================================ */

/* Loading Spinner */
.loading-spinner {
  position: relative;
  display: inline-block;
}

.loading-spinner-sm {
  width: 16px;
  height: 16px;
}

.loading-spinner-md {
  width: 40px;
  height: 40px;
}

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

.spinner-circle {
  width: 100%;
  height: 100%;
  border: 3px solid var(--gray-200, #E2E8F0);
  border-top-color: var(--primary-500, #FF6B35);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

[data-theme="dark"] .spinner-circle {
  border-color: var(--gray-300, #475569);
  border-top-color: var(--primary-500, #FF6B35);
}

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

.loading-spinner-lg .spinner-circle {
  border-width: 4px;
}

/* Skeleton Loading - Enhanced */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-100, #F1F5F9) 25%,
    var(--gray-200, #E2E8F0) 50%,
    var(--gray-100, #F1F5F9) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md, 0.5rem);
}

[data-theme="dark"] .skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-200, #334155) 25%,
    var(--gray-300, #475569) 50%,
    var(--gray-200, #334155) 75%
  );
  background-size: 200% 100%;
}

.skeleton-line {
  height: 1rem;
  margin-bottom: 0.5rem;
  border-radius: var(--radius-sm, 0.375rem);
}

.skeleton-circle {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
}

.skeleton-card {
  background: var(--bg-card, #FFFFFF);
  border: 1px solid var(--border-primary, #E2E8F0);
  border-radius: var(--radius-xl, 1rem);
  padding: var(--space-6, 1.5rem);
}

[data-theme="dark"] .skeleton-card {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

/* Error State */
.error-state {
  min-height: 300px;
}

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

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* Empty State */
.empty-state {
  min-height: 300px;
}

.empty-icon {
  opacity: 0.6;
  animation: float 3s ease-in-out infinite;
}

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

/* Inline Loading */
.inline-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2, 0.5rem);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 4px;
  background-color: var(--gray-200, #E2E8F0);
  border-radius: var(--radius-full, 9999px);
  overflow: hidden;
}

[data-theme="dark"] .progress-bar {
  background-color: var(--gray-300, #475569);
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500, #FF6B35), var(--primary-600, #E84A09));
  border-radius: var(--radius-full, 9999px);
  animation: progress 1.5s ease-in-out infinite;
  transform-origin: left;
}

@keyframes progress {
  0% {
    transform: scaleX(0);
    transform-origin: left;
  }
  50% {
    transform: scaleX(1);
    transform-origin: left;
  }
  100% {
    transform: scaleX(0);
    transform-origin: right;
  }
}

/* Pulse Animation for Loading Indicators */
@keyframes pulse-loading {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

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

/* Dots Loading */
.dots-loading {
  display: inline-flex;
  gap: 0.25rem;
  align-items: center;
}

.dots-loading span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary-500, #FF6B35);
  animation: dots-bounce 1.4s ease-in-out infinite both;
}

.dots-loading span:nth-child(1) {
  animation-delay: -0.32s;
}

.dots-loading span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes dots-bounce {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .spinner-circle,
  .skeleton,
  .skeleton-line,
  .skeleton-circle,
  .empty-icon,
  .progress-bar-fill,
  .pulse-loading,
  .dots-loading span {
    animation: none;
  }

  .skeleton,
  .skeleton-line,
  .skeleton-circle {
    background: var(--gray-200, #E2E8F0);
  }

  [data-theme="dark"] .skeleton,
  [data-theme="dark"] .skeleton-line,
  [data-theme="dark"] .skeleton-circle {
    background: var(--gray-300, #475569);
  }
}