3 CSS с отзывчивой столбцей CSS
.container {
display: grid;
grid-template-columns: 1fr 1fr 1fr; /*fraction*/
}
.section {
border: 1px solid;
}
@media (max-width: 768px) { /*breakpoint*/
.container {
grid-template-columns: none;
}
}
Dangerous Dragonfly