/* ============================================================
   GEM — education library (page-scoped, shared ONLY by
   patient-education.html + professional-education.html).
   Cards mirror the site card language (.feature-card): white
   ground, soft purple border, --radius corners, lifted shadow,
   gold-trimmed "Sample" pill. Compat rules as everywhere:
   no :has(), no inset shorthand, no flex gap (grid-gap only).
   ============================================================ */

/* Responsive grid: 1-up at 320px, 2-up on tablet, 3-up on desktop. */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 1.25rem;
}
@media (min-width: 640px)  { .edu-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .edu-grid { grid-template-columns: repeat(3, 1fr); } }

.edu-card {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  background: var(--white);
  border: 1px solid rgba(58, 42, 102, 0.10);
  border-radius: var(--radius);
  box-shadow: 0 8px 26px rgba(46, 33, 80, 0.13);
  color: var(--purple);
}

/* Media zone (YouTube facade / self-hosted video): fixed 16:9 via
   padding-top, so swapping thumbnail -> iframe cannot shift layout. */
.edu-card__media {
  position: relative;
  padding-top: 56.25%;
  margin-bottom: 0.9rem;
  border-radius: calc(var(--radius) - 6px);
  overflow: hidden;
  background: var(--purple-deep);
}
.edu-card__media > * {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;   /* longhand, not inset */
  width: 100%;
  height: 100%;
}
.edu-card__thumb { object-fit: cover; display: block; }
.edu-card__frame { border: 0; }
.edu-card__video { border: 0; object-fit: contain; background: #000; }

/* The whole media zone is the play button — tap target far beyond 44px. */
.edu-card__play {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.edu-card__play:focus-visible { outline: 3px solid var(--focus); outline-offset: -3px; }
.edu-card__playbadge {
  position: absolute;
  top: 50%; left: 50%;
  width: 64px; height: 64px;
  margin: -32px 0 0 -32px;
  border-radius: 50%;
  background: rgba(46, 33, 80, 0.85);
  border: 2px solid var(--white);
  transition: transform 0.15s ease, background-color 0.15s ease;
}
.edu-card__playbadge::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  margin: -11px 0 0 -7px;
  border-style: solid;
  border-width: 11px 0 11px 18px;
  border-color: transparent transparent transparent var(--white);
}
.edu-card__play:hover .edu-card__playbadge,
.edu-card__play:focus-visible .edu-card__playbadge {
  transform: scale(1.06);
  background: rgba(46, 33, 80, 0.95);
}

/* Type line + Sample pill (pill recipe = .feature-card__tag). */
.edu-card__meta { margin: 0 0 0.45rem; }
.edu-card__type {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-deep);   /* same AA-checked gold as .page-banner .eyebrow */
}
.edu-card__tag {
  display: inline-block;
  margin-left: 0.5rem;
  vertical-align: middle;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--purple-deep);
  background: var(--white);
  border: 1px solid var(--gold);
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
}

.edu-card__title {
  font-family: var(--font-head);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--purple);
  margin: 0 0 0.35rem;
}
.edu-card__desc {
  font-size: var(--fs-body);
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
}

/* Article extras: outbound "Read more" link, or native <details> expander. */
.edu-card__more {
  display: inline-block;
  margin-top: 0.55rem;
  padding: 0.65rem 0.1rem;   /* line + padding >= 44px tap height */
  font-weight: 600;
  color: var(--purple);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.edu-card__more:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.edu-card__details { margin-top: 0.55rem; }
.edu-card__details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--purple);
  padding: 0.65rem 0.1rem;   /* >= 44px tap height */
}
.edu-card__details summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.edu-card__details[open] summary { margin-bottom: 0.35rem; }
.edu-card__bodytext p {
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--text);
  margin: 0 0 0.8em;
}
.edu-card__bodytext p:last-child { margin-bottom: 0; }

/* Empty library — honest message instead of a blank grid. */
.edu-empty {
  text-align: center;
  padding: clamp(2rem, 6vw, 4rem) 1rem;
  color: var(--text-muted);
}
.edu-empty__title {
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  color: var(--purple);
  margin: 0 0 0.5rem;
}

@media (prefers-reduced-motion: reduce) {
  .edu-card__playbadge { transition: none; }
  .edu-card__play:hover .edu-card__playbadge,
  .edu-card__play:focus-visible .edu-card__playbadge { transform: none; }
}