/*
 * Feed list: scroll snap, the new-posts pill and the loading-more skeleton
 * (spec "Feed list", ADR 0001). Prefixed `feed-` classes, tokens only.
 */
.feed .feed-list { scroll-snap-type: y proximity; }

.feed-message { text-align: center; color: var(--ink-3); padding: 32px 16px; }
.feed-message button { margin-top: 8px; }
.feed-center { display: grid; place-items: center; padding: 16px; }
.sentinel { height: 1px; }

.spinner { width: 24px; height: 24px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* The pill floats at the top center of the list. The zero-height sticky
   wrapper takes the entrance animation, so the button keeps its own transforms
   (hover expand, press). */
.feed-pill {
  position: sticky;
  top: 12px;
  z-index: 4;
  display: flex;
  justify-content: center;
  height: 0;
  margin-bottom: -16px;
  overflow: visible;
  animation: feed-pill-in .45s var(--ease) backwards;
}
.feed-pill .btn-grow { flex: none; }
@keyframes feed-pill-in { from { opacity: 0; transform: translateY(-10px) scale(.96); } to { opacity: 1; transform: none; } }

/* Skeleton card: same footprint as a post, with a shimmer band sweeping over it. */
.feed-skel {
  flex: none;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: var(--tile);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  scroll-snap-align: none;
}
.feed-skel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 20%, color-mix(in srgb, var(--ink), transparent 90%) 50%, transparent 80%);
  transform: translateX(-100%);
  animation: feed-shimmer 1.4s ease-in-out infinite;
}
@keyframes feed-shimmer { to { transform: translateX(100%); } }
.feed-skel-head { display: flex; align-items: center; gap: 12px; }
.feed-skel-lines { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.feed-skel-dot { width: 40px; height: 40px; border-radius: 50%; background: var(--tile-3); flex: none; }
.feed-skel-line { display: block; height: 12px; border-radius: 6px; background: var(--tile-3); }
.feed-skel-w25 { width: 25%; }
.feed-skel-w40 { width: 40%; }
.feed-skel-w80 { width: 80%; }
.feed-skel-w100 { width: 100%; }
.feed-skel-media { display: block; aspect-ratio: 16 / 9; border-radius: 12px; background: var(--tile-3); }

/* Refresh button in the feed header. Its disabled state keeps full opacity, so
   the spinning icon is the only sign that a reload is running. */
.refresh-icon { display: block; }
.refresh-icon-spin { animation: spin .8s linear infinite; }
@media (prefers-reduced-motion: reduce) {
  .refresh-icon-spin { animation: none !important; }
}