/* ============================================================
   Widget · Concept Cards
   ============================================================
   Pair of explainer cards (e.g. GABA / Glutamate). Mirrors the
   `.neuro` block from the Alcohol Withdrawal mockup.

   Layout: 1 column on mobile, 2 columns from 600px so two
   complementary cards sit side-by-side without crowding.
   Decorative corner blob is the `::before` — kept subtle
   (opacity 0.08) so it reads as a tint, not a graphic.
   ============================================================ */

.bdc-concept-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 20px 0 24px;
  font-family: var(--bdc-sans);
}

@media (min-width: 600px) {
  .bdc-concept-cards {
    /* Default 2-col. The `columns` control overrides via the
       `--bdc-cc-cols` custom property on the widget wrapper. */
    grid-template-columns: var(--bdc-cc-cols, 1fr 1fr);
  }
}

.bdc-concept-cards__card {
  background: var(--bdc-surface);
  border: 1px solid var(--bdc-line);
  border-radius: var(--bdc-r-lg);
  padding: 20px;
  box-shadow: var(--bdc-shadow-card);
  position: relative;
  overflow: hidden;
}

/* Linked variant: the whole card is an <a>. Strip default link styling
 * (color inheritance, underline) so child h3/p/span keep their own
 * typography. Subtle lift + accent border on hover/focus to telegraph
 * the click affordance without breaking the calm visual rhythm. */
.bdc-v3 .bdc-concept-cards__card--linked {
  display: block;
  color: inherit;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}
.bdc-v3 .bdc-concept-cards__card--linked:hover,
.bdc-v3 .bdc-concept-cards__card--linked:focus-visible {
  transform: translateY(-2px);
  border-color: var(--bdc-sage);
  box-shadow: 0 8px 24px -10px rgba(31, 63, 51, 0.18);
}
.bdc-v3 .bdc-concept-cards__card--linked:focus-visible {
  outline: 2px solid var(--bdc-accent);
  outline-offset: 2px;
}
.bdc-v3 .bdc-concept-cards__card--linked .bdc-concept-cards__title {
  transition: color 180ms ease;
}
.bdc-v3 .bdc-concept-cards__card--linked:hover .bdc-concept-cards__title {
  color: var(--bdc-sage);
}

.bdc-concept-cards__card::before {
  content: "";
  position: absolute;
  top: -16px;
  right: -16px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  opacity: 0.08;
  pointer-events: none;
}
.bdc-concept-cards__card--sage::before   { background: var(--bdc-sage); }
.bdc-concept-cards__card--accent::before { background: var(--bdc-accent); }

.bdc-concept-cards__tag {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--bdc-r-pill);
  margin-bottom: 10px;
}
.bdc-concept-cards__card--sage   .bdc-concept-cards__tag { background: var(--bdc-sage-soft);   color: var(--bdc-sage); }
.bdc-concept-cards__card--accent .bdc-concept-cards__tag { background: var(--bdc-accent-soft); color: var(--bdc-accent-2); }

.bdc-concept-cards__title {
  font-family: var(--bdc-serif);
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  color: var(--bdc-ink);
  line-height: 1.15;
}

.bdc-concept-cards__subtitle {
  font-family: var(--bdc-mono);
  font-size: 12px;
  color: var(--bdc-ink-3);
  margin-bottom: 10px;
  line-height: 1.4;
}

.bdc-concept-cards__text {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--bdc-ink-2);
  margin: 0;
}

/* ───── Desktop scaling ───── */

@media (min-width: 768px) {
  .bdc-concept-cards {
    gap: 16px;
    margin: 24px 0 32px;
  }
  .bdc-concept-cards__card {
    padding: 24px 24px 26px;
  }
  .bdc-concept-cards__card::before {
    width: 80px;
    height: 80px;
    top: -20px;
    right: -20px;
  }
  .bdc-concept-cards__tag {
    font-size: 11px;
    padding: 5px 12px;
    margin-bottom: 12px;
  }
  .bdc-concept-cards__title {
    font-size: 26px;
  }
  .bdc-concept-cards__subtitle {
    font-size: 12.5px;
    margin-bottom: 12px;
  }
  .bdc-concept-cards__text {
    font-size: 16px;
    line-height: 1.6;
  }
}

@media (min-width: 1200px) {
  .bdc-concept-cards { gap: 20px; }
  .bdc-concept-cards__card { padding: 28px 28px 30px; }
  .bdc-concept-cards__title { font-size: 28px; }
  .bdc-concept-cards__text  { font-size: 17px; }
}

/* ───── Specificity safety ─────
   Same trap as the other widgets: theme rules like
   `.bdc-post-content-col p` and `body h3` win against our
   (0,1,0) selectors. Re-declaring under `.bdc-v3` bumps us to
   (0,2,0). The `__card p` selector also protects against
   WYSIWYG-wrapped paragraphs inside `wp_kses_post` output. */

.bdc-v3 .bdc-concept-cards__title { color: var(--bdc-ink); }
.bdc-v3 .bdc-concept-cards__subtitle { color: var(--bdc-ink-3); }
.bdc-v3 .bdc-concept-cards__text,
.bdc-v3 .bdc-concept-cards__card p { color: var(--bdc-ink-2); }

.bdc-v3 .bdc-concept-cards__card--sage .bdc-concept-cards__tag {
  background: var(--bdc-sage-soft);
  color: var(--bdc-sage);
}
.bdc-v3 .bdc-concept-cards__card--accent .bdc-concept-cards__tag {
  background: var(--bdc-accent-soft);
  color: var(--bdc-accent-2);
}