/* ═══════════════════════════════════════════════
   SPINNER — loading indicator
   ═══════════════════════════════════════════════ */

.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.spinner--sm {
  width: 1rem;
  height: 1rem;
  border-width: 2px;
}

.spinner--lg {
  width: 2rem;
  height: 2rem;
  border-width: 3px;
}

.spinner--dark {
  border-color: rgba(0, 0, 0, 0.15);
  border-top-color: var(--color-accent);
}

/* Full-page loading */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

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

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