/* Carousel — design.md §15/§14.7. Native scroll-snap, 4 cards desktop,
   1.3 visible mobile (teasing next card), arrows on container hover. */

.rail {
  position: relative;
}

.rail__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.rail__eyebrow {
  display: block;
  color: var(--accent-gold);
  margin-bottom: var(--space-2);
}

.rail__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - 16px * 0.3) / 1.3); /* 1.3 visible, mobile */
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--space-1);
  padding-block: var(--space-2) var(--space-6); /* room for hover lift shadow */
  scrollbar-width: none;
}

.rail__track::-webkit-scrollbar { display: none; }

.rail__track > * { scroll-snap-align: start; }

@media (min-width: 640px) {
  .rail__track { grid-auto-columns: calc((100% - 24px * 2) / 2.4); gap: 24px; }
}

@media (min-width: 1024px) {
  .rail__track { grid-auto-columns: calc((100% - 24px * 3) / 4); } /* 4 visible desktop */
}

@media (min-width: 1440px) {
  .rail__track { grid-auto-columns: calc((100% - 32px * 3) / 4); gap: 32px; }
}

/* Arrow nav — appears on container hover, desktop (§14.7) */
.rail__arrow {
  position: absolute;
  top: 40%;
  width: 44px;
  height: 44px;
  display: none;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--surface-primary);
  border: var(--border-hairline);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  z-index: 1;
  opacity: 0;
  transition: opacity 200ms var(--easing-standard);
}

.rail__arrow--prev { left: -22px; }
.rail__arrow--next { right: -22px; }

@media (min-width: 1024px) and (hover: hover) {
  .rail__arrow { display: grid; }
  .rail:hover .rail__arrow { opacity: 1; }
  .rail__arrow:disabled { opacity: 0 !important; }
}

.rail__arrow svg { width: 20px; height: 20px; stroke-width: 1.5; }