/* HYPERPART: skeleton */
/*
 * dz-skeleton — loading placeholder. A muted block with a low-contrast
 * sheen sweep derived from the request lifecycle (taste principle 9,
 * TASTE-9): drop it into a swap target while `.htmx-request` is in flight,
 * so the loading state IS the design language, not a spinner bolted on.
 *
 * Shapes via data-dz-shape: `text` (a line of copy), `circle` (avatar),
 * `block` (media / card body). Purely decorative — hide the placeholder
 * from AT (aria-hidden on the region) and announce "loading" on the live
 * region that owns the swap, not here.
 */

.dz-skeleton {
  /* internal tokens (double-dash → never reprefixed, kept out of the API) */
  --dz-skeleton-base: var(--colour-surface-muted);
  --dz-skeleton-sheen: color-mix(in oklab, var(--colour-text) 8%, var(--colour-surface-muted));
  display: block;
  width: 100%;
  border-radius: var(--radius-sm);
  background-color: var(--dz-skeleton-base);
  background-image: linear-gradient(
    90deg,
    transparent 0%,
    var(--dz-skeleton-sheen) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  background-repeat: no-repeat;
  animation: dz-skeleton-sweep 1.4s var(--ease-out, ease) infinite;
}

.dz-skeleton[data-dz-shape="text"] {
  height: 0.75rem;
  border-radius: var(--radius-full);
}

.dz-skeleton[data-dz-shape="text"]:last-child {
  width: 65%;
}

.dz-skeleton[data-dz-shape="circle"] {
  width: 2.5rem;
  height: 2.5rem;
  flex: none;
  border-radius: var(--radius-full);
}

.dz-skeleton[data-dz-shape="block"] {
  min-height: 4rem;
  border-radius: var(--radius-md);
}

/* A stack of text-line skeletons — the most common placeholder shape
   (a paragraph loading). The last line is shortened by the [data-dz-shape]
   rule above for a natural ragged edge. */
.dz-skeleton-lines {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

@keyframes dz-skeleton-sweep {
  from { background-position: 150% 0; }
  to { background-position: -150% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .dz-skeleton { animation: none; }
}