/* ── Overview ── */
#overview {
  padding: 2.5rem 5vw;
  background: var(--green-light);
  border-bottom: 1px solid var(--border);
}

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 900px;
}

.overview-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.overview-block p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.demo-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.demo-stat {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
}

.demo-stat .n {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--green);
}

.demo-stat .t {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

@media (max-width: 640px) {
  .overview-grid { grid-template-columns: 1fr; }
}