/* feature-grids.css — 3 layouts */

.feature-grid {
  display: grid;
  gap: 16px;
  margin: 32px 0;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.feature-card .ico {
  width: 36px; height: 36px; flex: none;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid; place-items: center;
  font-weight: 700; font-family: 'JetBrains Mono', monospace;
  margin-bottom: 4px;
}
.feature-card h3 {
  font-family: 'Manrope', sans-serif; font-size: 16px; font-weight: 700;
  color: var(--heading); margin: 0;
}
.feature-card p {
  font-size: 13px; color: var(--text-muted); line-height: 1.55; margin: 0;
}
.feature-card .meta {
  margin-top: auto;
  font-size: 11px; font-family: 'JetBrains Mono', monospace;
  color: var(--text-faint); padding-top: 8px;
}

/* ─── 1 · cards-3x2 (default) ───────────────────────── */
.feature-grid--cards-3x2 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 900px)  { .feature-grid--cards-3x2 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px)  { .feature-grid--cards-3x2 { grid-template-columns: 1fr; } }

/* ─── 2 · featured-2x3 — first card 2× wide ─────────── */
.feature-grid--featured-2x3 {
  grid-template-columns: repeat(3, 1fr);
}
.feature-grid--featured-2x3 > .feature-card:first-child {
  grid-column: span 2; grid-row: span 1;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border-color: var(--accent-ring);
  padding: 32px;
}
.feature-grid--featured-2x3 > .feature-card:first-child h3 { font-size: 24px; }
.feature-grid--featured-2x3 > .feature-card:first-child p  { font-size: 15px; }
.feature-grid--featured-2x3 > .feature-card:first-child .ico {
  width: 44px; height: 44px; background: var(--accent); color: #fff;
}
.feature-grid--featured-2x3 > .feature-card:first-child .featured-tag {
  display: inline-block; padding: 3px 8px; border-radius: 4px;
  background: var(--accent); color: #fff;
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: .08em; text-transform: uppercase;
  align-self: flex-start;
}
@media (max-width: 900px) {
  .feature-grid--featured-2x3 { grid-template-columns: 1fr 1fr; }
  .feature-grid--featured-2x3 > .feature-card:first-child { grid-column: span 2; }
}
@media (max-width: 540px) {
  .feature-grid--featured-2x3 { grid-template-columns: 1fr; }
  .feature-grid--featured-2x3 > .feature-card:first-child { grid-column: span 1; }
}

/* ─── 3 · split-list-detail — 1/3 sidebar + 2/3 detail ─ */
.feature-grid--split-list-detail {
  grid-template-columns: 1fr 2fr;
  align-items: stretch;
}
.split-list {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px;
  max-height: 600px;
  overflow-y: auto;
  min-width: 0;
}
.split-list button {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; text-align: start;
  background: transparent; border: 0; cursor: pointer;
  padding: 10px 12px; border-radius: 8px;
  color: var(--text); font-family: inherit; font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.split-list button:hover { background: var(--bg-card-2); color: var(--heading); }
.split-list button[aria-current="true"] {
  background: var(--accent-soft); color: var(--accent);
}
.split-list button .badge {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  color: var(--text-faint);
}
.split-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  min-width: 0;
}
.split-detail h3 {
  font-family: 'Manrope', sans-serif; font-size: 22px;
  margin: 0 0 8px; color: var(--heading);
}
.split-detail .term-meta {
  font-size: 12px; color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace; margin-bottom: 16px;
}
.split-detail p { font-size: 14px; line-height: 1.7; color: var(--text); }
.split-detail .related-terms {
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border);
  display: flex; gap: 8px; flex-wrap: wrap;
}
.split-detail .related-terms a {
  font-size: 12px; padding: 4px 10px; border-radius: 999px;
  background: var(--bg-card-2); color: var(--text-muted); border: 1px solid var(--border);
}
.split-detail .related-terms a:hover { color: var(--accent); border-color: var(--accent); }
@media (max-width: 900px) {
  .feature-grid--split-list-detail { grid-template-columns: 1fr; }
  .split-list { max-height: 280px; }
}