/* ============================================================
   Four-mechanism framework grid (Section B of copy handoff)
   Component used on the homepage, treatment hubs, and any page
   that introduces the mechanism framework.
   ============================================================ */

.v4-mech {
  margin: 32px 0 0;
}
.v4-mech__lbl {
  display: block;
  margin-bottom: 18px;
  color: var(--accent-blue);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.v4-mech__intro {
  max-width: 720px;
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-size: var(--body-lg-size);
  line-height: var(--body-lg-leading);
}
.v4-mech__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.v4-mech__cell {
  padding: 22px 24px;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.v4-mech__cell h4 {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0;
}
.v4-mech__cell p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: none;
}
.v4-mech__cell--inflam { background: #EAF1F8; }
.v4-mech__cell--inflam h4 { color: #2D6EB1; }
.v4-mech__cell--fibro  { background: #E7F3EC; }
.v4-mech__cell--fibro  h4 { color: #2F7A4F; }
.v4-mech__cell--immuno { background: #F0EAF5; }
.v4-mech__cell--immuno h4 { color: #6B4E8A; }
.v4-mech__cell--angio  { background: #FBEFE4; }
.v4-mech__cell--angio  h4 { color: #B85F2F; }

@media (max-width: 720px) {
  .v4-mech__grid { grid-template-columns: 1fr; }
}