/* Activity Library — card grid + detail page (light, matches site shell) */

/* House-style eyebrow: mono pill chip (mint bg, line border) used above
   page titles — "Interactive Library" / "Activity". */
.activity-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 3px 12px;
  margin-bottom: 0.6rem;
  border-radius: 999px;
  background: var(--mint);
  border: 1px solid var(--line);
  color: var(--teal-deep);
  font-family: var(--jm-font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.activities-page h1,
.activity-detail h1 {
  font-family: var(--jm-font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.activity-detail h2 {
  font-family: var(--jm-font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.activity-card {
  border: 1px solid var(--line);
  border-radius: 1rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  height: 100%;
  overflow: hidden;
}
.activity-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.activity-detail {
  max-width: 860px;
}

/* The four canonical Efron dice piece colours (green/yellow/red/purple) as
   the library's signature stripe. Game-piece colours, not theme colours —
   documented exemption from the no-purple theme rule. */
.activity-card__band {
  height: 0.375rem;
  background: linear-gradient(
    90deg,
    #2e8b57 0 25%,
    #e0a800 25% 50%,
    #c0392b 50% 75%,
    #6f42c1 75% 100%
  );
}
.activity-card__band--resource {
  background: var(--teal);
}

/* Cover thumbnail — first page of the activity's primary PDF */
.activity-card__cover {
  position: relative;
  background: var(--bs-tertiary-bg, #f1f3f5);
  border-bottom: 1px solid var(--bs-border-color);
  height: 190px;
  overflow: hidden;
}
.activity-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}
.activity-card__cover .activity-type-badge {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  z-index: 1;
}

/* Cover rendered as a <button> (click-to-preview) — strip native chrome. */
.activity-card__cover--preview {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  text-align: left;
  cursor: zoom-in;
}

/* Hover/focus overlay: "Preview" on previewable tiles, lock on gated ones. */
.activity-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  background: rgba(13, 41, 31, 0.5);
  opacity: 0;
  transition: opacity 0.15s ease;
}
.activity-card__cover--preview:hover .activity-card__overlay,
.activity-card__cover--preview:focus-visible .activity-card__overlay,
.activity-card__cover--locked:hover .activity-card__overlay,
.activity-card__cover--locked:focus-visible .activity-card__overlay {
  opacity: 1;
}
/* Locked tiles read as gated at rest — a faint padlock badge, full label on hover. */
.activity-card__cover--locked .activity-card__overlay {
  opacity: 1;
  background: linear-gradient(180deg, rgba(13, 41, 31, 0) 55%, rgba(13, 41, 31, 0.72));
  align-items: flex-end;
  padding-bottom: 0.6rem;
  font-size: 0.78rem;
}

.activity-preview-frame {
  width: 100%;
  height: 80vh;
  border: 0;
  display: block;
}

/* Type badge — mono eyebrow chip. "Live game" pops tangerine (the
   interactive, gamified idea), "Resource" stays a calm teal/mint pill. */
.activity-type-badge {
  font-family: var(--jm-font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
}
.activity-type-badge--live {
  background: var(--tangerine) !important;
  color: #fff !important;
}
.activity-type-badge--resource {
  background: var(--mint) !important;
  color: var(--teal-deep) !important;
  border-color: var(--line);
}

.activity-filter-label {
  min-width: 4.5rem;
  font-weight: 600;
  font-family: var(--jm-font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.activity-meta {
  font-family: var(--jm-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.activity-filter-row .btn-sm {
  min-height: 0;
  padding: 0.25rem 0.6rem;
}

.activity-filters-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    width: 100%;
}

.activity-filters-sheet {
    --bs-offcanvas-width: min(90vw, 340px);
}

@media (max-width: 991.98px) {
    .activity-filters-sheet .offcanvas-body {
        display: block;
    }
}