.responsive-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 15px;
  background: #e9ecef;
  padding: 20px;
  border-radius: 4px;
}

.responsive-item {
  background: #6610f2;
  color: white;
  padding: 20px;
  text-align: center;
  border-radius: 4px;
  font-weight: bold;
}

.header-resp {
  grid-column: 1 / -1;
  background: #198754;
}

.sidebar-resp {
  grid-column: 1 / 4;
  background: #fd7e14;
}

.main-resp {
  grid-column: 4 / 10;
  background: #0dcaf0;
  color: #212529;
}

.aside-resp {
  grid-column: 10 / -1;
  background: #d63384;
}

.footer-resp {
  grid-column: 1 / -1;
  background: #6c757d;
}

@media (max-width: 768px) {
  .sidebar-resp,
  .main-resp,
  .aside-resp {
    grid-column: 1 / -1;
  }
}