.project-groups {
  display: grid;
  gap: 64px;
  margin-top: 64px;
}

.project-group__heading {
  margin: 0 0 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  color: var(--green-dark);
  font-family: var(--heading);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -.025em;
}

.gallery--project figure:nth-child(n) img {
  object-position: center;
}

@media (max-width: 820px) {
  .project-groups {
    gap: 50px;
    margin-top: 50px;
  }
}