/* Chapter/mosaic layouts specific to the Achievements storytelling page.
   Requires style.css to be loaded first. */

.chapter { margin-bottom: var(--sp-9); }
.chapter-head {
  display: flex; align-items: flex-start; gap: var(--sp-5);
  margin-bottom: var(--sp-6); padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--gray-200);
}
.chapter-number {
  font-family: var(--font-head); font-size: 3rem; font-weight: 700; line-height: 1;
  color: var(--gray-200); flex-shrink: 0; min-width: 2.6rem; transition: color var(--dur-med);
}
.chapter:hover .chapter-number { color: var(--red-bright); }
.chapter-meta { flex: 1; }
.chapter-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--red); margin-bottom: 8px;
}
.chapter-tag::before { content: ""; width: 20px; height: 2px; background: var(--red); }
.chapter-title { font-size: clamp(1.2rem, 2.4vw, 1.7rem); margin-bottom: 8px; }
.chapter-desc { color: var(--text-muted); font-size: 0.96rem; line-height: 1.8; max-width: 680px; }
.chapter-desc strong { color: var(--text); font-weight: 700; }

.img-tile {
  border-radius: var(--r-sm);
  overflow: hidden;
  cursor: zoom-in;
  background: var(--surface);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}
.img-tile img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.6s var(--ease); }
.img-tile:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.img-tile:hover img { transform: scale(1.04); }

.mosaic { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.mosaic .img-tile { aspect-ratio: 4/3; }

.grid-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--sp-4); }
.grid-tiles .img-tile { aspect-ratio: 4/3; }
.grid-tiles.portrait .img-tile { aspect-ratio: 3/4; background: var(--white); }
.grid-tiles.portrait .img-tile img { object-fit: contain; }

.featured-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: var(--sp-4); }
.featured-layout .img-tile.main { aspect-ratio: 4/3; }
.featured-sides { display: flex; flex-direction: column; gap: var(--sp-4); }
.featured-sides .img-tile { flex: 1; min-height: 0; }
.featured-sides .img-tile img { height: 100%; }

.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.trio .img-tile { aspect-ratio: 4/3; }

.strip { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--sp-4); }
.strip .img-tile { aspect-ratio: 4/3; }

@media (max-width: 900px) {
  .featured-layout { grid-template-columns: 1fr; }
  .featured-layout .img-tile.main { aspect-ratio: 16/9; }
  .featured-sides .img-tile { flex: none; aspect-ratio: 4/3; }
  .mosaic, .trio { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .chapter-head { flex-direction: column; gap: 8px; }
  .chapter-number { font-size: 2rem; }
}
@media (max-width: 420px) {
  .mosaic, .trio { grid-template-columns: 1fr; }
}