.responsive-grid {
  display: grid;
  gap: 15px;
  grid-template-columns: repeat(4, 1fr);
}

.grid-item {
  padding: 20px;
  color: white;
  text-align: center;
  border-radius: 4px;
  font-weight: bold;
}

/* Tablet */
@media (max-width: 768px) {
  .responsive-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 480px) {
  .responsive-grid {
    grid-template-columns: 1fr;
  }
}