.l-container {
  width: min(var(--container), calc(100% - 3rem));
  margin-inline: auto;
}

.l-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

@media (max-width: 900px) {
  .l-grid-3 {
    grid-template-columns: 1fr;
  }
}