/* ==========================================================================
   Video carousel — used only by the "Watch" section on content.html.
   Turns a long vertical grid of video cards into a horizontally-scrolling
   2-row x 3-column carousel with prev/next arrows.

   Reuses the existing design tokens (--bg, --accent, --border, etc.) and the
   existing .media-item / .media-thumb / .media-body card styles from
   style.css — this file only lays out the track and styles the arrows.
   ========================================================================== */

/* Wrapper that positions the arrow buttons relative to the scrolling track. */
.carousel {
  position: relative;
}

/* The scrolling track.
   - Two rows, and columns are auto-created as cards flow down-then-right,
     so every 3 columns = one "page" of 6 videos on desktop.
   - Native CSS scroll-snap keeps columns aligned as you scroll or click. */
.carousel-track {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(2, auto);
  /* 3 columns visible at once. Each column is a third of the track width,
     minus its share of the two gaps between the three columns. */
  grid-auto-columns: calc((100% - 2 * 1.5rem) / 3);
  gap: 1.5rem;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  /* Room for the focus ring / hover lift so cards aren't clipped. */
  padding: 4px;
  margin: -4px;
  /* Hide the native scrollbar — navigation is via the arrows / swipe. */
  scrollbar-width: none;          /* Firefox */
  -ms-overflow-style: none;       /* old Edge */
}
.carousel-track::-webkit-scrollbar { display: none; } /* Chrome / Safari */

/* Snap each card's column to the left edge of the track. */
.carousel-track > .media-item {
  scroll-snap-align: start;
}

/* Arrow controls — circular, accent-colored, matching the .play / .btn
   visual language from style.css. */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg);
  font-size: 1.2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease,
              background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}
.carousel-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-elev-2);
  box-shadow: 0 0 24px var(--accent-glow);
}
.carousel-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
/* Dimmed + non-interactive at the start (prev) or end (next) of the track. */
.carousel-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

/* Pull the arrows just outside the track so they don't cover the cards. */
.carousel-btn.prev { left: -22px; }
.carousel-btn.next { right: -22px; }

/* --------------------------------------------------------------------------
   Responsive: as the viewport narrows, show fewer columns per page.
   Horizontal swipe/scroll still works at every size.
   -------------------------------------------------------------------------- */

/* Tablet: 2 columns per page. */
@media (max-width: 900px) {
  .carousel-track {
    grid-auto-columns: calc((100% - 1.5rem) / 2);
  }
}

/* Mobile: 1 column per page. Tuck arrows inside the edges so they stay
   reachable, or the user can simply swipe horizontally. */
@media (max-width: 600px) {
  .carousel-track {
    grid-auto-columns: 100%;
  }
  .carousel-btn.prev { left: 4px; }
  .carousel-btn.next { right: 4px; }
}

/* Respect users who prefer reduced motion: no smooth-scroll animation. */
@media (prefers-reduced-motion: reduce) {
  .carousel-track { scroll-behavior: auto; }
}