/* ═══════════════════════════════════════════════════════════════
   Video slide gallery
   Self-contained: falls back to its own values when the page does
   not define the design tokens below, so it can be dropped into
   another site as-is. Markup + behaviour: static/js/gallery.js
   ═══════════════════════════════════════════════════════════════ */

.gallery {
  /* Active slide width. It is centred; what is left of the track splits
     into the faded previous / next peeks on either side. */
  /* Same width as the page's text column (.container minus its padding),
     so slides line up with the other videos; on narrow screens leave
     1.5rem each side for the peeks. */
  --g-col:     calc(var(--max-width, 900px) - 3rem);
  --g-slide:   min(var(--g-col), calc(100% - 3rem));
  --g-gap:     1.25rem;
  --g-max:     1240px;  /* cap the track, which sets how wide the peeks get */
  --g-fade:    7%;      /* soft fade toward the track edges */
  --g-text:    var(--text, #1a1a1a);
  --g-muted:   var(--text-muted, #6b6b6b);
  --g-border:  var(--border, #e3e3e3);
  --g-strong:  var(--border-strong, #c8c8c8);
  --g-radius:  var(--radius-lg, 6px);
  --g-font:    var(--font-sans, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  font-family: var(--g-font);
}

/* ── Title buttons ─────────────────────────────────────────── */
.gallery-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin: 0 0 1rem;
  padding: 0 1rem;
}
.gallery-tab {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.3;
  padding: 0.42rem 0.95rem;
  color: var(--g-text);
  background: transparent;
  border: 1px solid var(--g-strong);
  border-radius: 999px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.gallery-tab:hover { border-color: var(--g-text); }
.gallery-tab.is-active {
  background: var(--g-text);
  border-color: var(--g-text);
  color: #fff;
}
.gallery-tab:focus-visible,
.gallery-nav:focus-visible,
.gallery-track:focus-visible {
  outline: 2px solid #4f46e5;
  outline-offset: 2px;
}

/* ── Track ─────────────────────────────────────────────────── */
.gallery-track {
  position: relative;            /* offsetParent for slide positions */
  display: flex;
  gap: var(--g-gap);
  max-width: var(--g-max);
  margin: 0 auto;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain; /* no browser back-swipe on trackpads */
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 var(--g-fade), #000 calc(100% - var(--g-fade)), transparent);
          mask-image: linear-gradient(90deg, transparent, #000 var(--g-fade), #000 calc(100% - var(--g-fade)), transparent);
}
.gallery-track::-webkit-scrollbar { display: none; }

/* Spacers so the first and last slides can be centred too */
.gallery-track::before,
.gallery-track::after {
  content: '';
  flex: 0 0 max(0px, calc((100% - var(--g-slide)) / 2 - var(--g-gap)));
}

.gallery-slide {
  flex: 0 0 var(--g-slide);
  margin: 0;
  scroll-snap-align: center;
  opacity: 0.45;
  cursor: pointer;
  transition: opacity .3s ease;
}
.gallery-slide:hover { opacity: 0.7; }
.gallery-slide.is-active { opacity: 1; cursor: auto; }

.gallery-media {
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--g-border);
  border-radius: var(--g-radius);
  overflow: hidden;
}
/* Playback-speed badge, bottom-right of a slide's video */
.gallery-media { position: relative; }
.speed-badge {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 0.3rem 0.85rem;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  background: rgba(18, 18, 18, 0.78);
  border-radius: 9px;
  pointer-events: none;
  transition: bottom .2s ease;
}
/* The active slide shows native controls on hover; lift the badge above them */
.gallery-slide.is-active:hover .speed-badge { bottom: 58px; }

.gallery-media video {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
}

.gallery-slide figcaption {
  margin-top: 0.6rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--g-muted);
  text-align: center;
}

/* ── Prev / next ───────────────────────────────────────────── */
.gallery-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  margin-top: 0.85rem;
}
.gallery-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  font-size: 0.85rem;
  color: var(--g-text);
  background: transparent;
  border: 1px solid var(--g-strong);
  border-radius: 50%;
  cursor: pointer;
  transition: border-color .15s ease, opacity .15s ease;
}
.gallery-nav:hover:not(:disabled) { border-color: var(--g-text); }
.gallery-nav:disabled { opacity: 0.35; cursor: default; }
.gallery-counter {
  min-width: 3.5rem;
  text-align: center;
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  color: var(--g-muted);
}

@media (max-width: 640px) {
  .gallery { --g-gap: 0.5rem; --g-fade: 3%; }
  .gallery-tab { font-size: 0.8rem; padding: 0.36rem 0.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  .gallery-slide, .gallery-tab { transition: none; }
}