/* ============================================================
   COLLECTIONS STAGE — horizontal infinite scroll
============================================================ */
.collections-stage {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-top: var(--nav-height, 64px);
  padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom) + var(--space-8));
  position: relative;
}

.collections-scroll {
  flex: 1;
  min-height: 0;
  overflow-x: scroll;
  overflow-y: hidden;
  scrollbar-width: none;
  display: flex;
  align-items: stretch;
  gap: var(--space-3); /* fallback; overridden by JS calcLayout */
  padding: 0;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}

.collections-scroll::-webkit-scrollbar {
  display: none;
}

.collections-scroll.dragging {
  cursor: grabbing;
}

/* Touch devices only — desktop uses wheel/drag/arrow keys which don't need snap */
@media (hover: none) {
  .collections-scroll {
    scroll-snap-type: x mandatory;
  }
}

/* ============================================================
   COLLECTION CARD
============================================================ */
.collection-card {
  display: block;
  text-decoration: none;
  color: inherit;
  flex: 0 0 auto;
  height: 100%;
  aspect-ratio: 2 / 3;
  max-width: 420px;
  position: relative;
  border-radius: 2px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
  scroll-snap-align: start;
}

.collection-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0);
  border-radius: 2px;
  transition: border-color var(--duration-normal) var(--ease-standard);
  pointer-events: none;
}

.collection-card:hover::after {
  border-color: rgba(255, 255, 255, 0.15);
}

.card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(100%);
  transition: transform var(--duration-cinematic) var(--ease-standard),
              filter var(--duration-cinematic) var(--ease-standard);
  will-change: transform;
}

.collection-card:hover .card-bg {
  transform: scale(1.04);
  filter: grayscale(0%);
}

/* Touch devices: show cards in color since there is no hover state */
@media (hover: none) {
  .card-bg {
    filter: grayscale(0%);
  }
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.25) 50%,
    rgba(0, 0, 0, 0.05) 100%
  );
  pointer-events: none;
}

.card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.card-title {
  font-family: var(--font-body);
  font-size: var(--text-heading);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-primary);
  line-height: 1.1;
}

.card-count {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  color: var(--text-tertiary);
}

/* ============================================================
   DOTS
============================================================ */
.collections-dots {
  position: absolute;
  bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
}

.c-dot {
  width: 4px;
  height: 4px;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--text-secondary);
  cursor: pointer;
  padding: 3px;
  box-sizing: content-box;
  transition: all var(--duration-normal) var(--ease-standard);
}

.c-dot.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
}

/* ============================================================
   TABLET (iPad) — max 2 cards visible
============================================================ */
@media (max-width: 1024px) {
  .collection-card {
    max-width: none;
  }
}

/* ============================================================
   MOBILE — single card, full-width snap
============================================================ */
@media (max-width: 768px) {
  .collection-card {
    max-width: none;
  }

  .collections-scroll {
    padding: 0;
  }

  .card-content {
    padding: var(--space-5) var(--space-4);
  }
}