HTML
<div class="parent">
<header class="section coral">Header</header>
<div class="left-side section blue">Left Sidebar</div>
<main class="section green"> Main Content</main>
<div class="right-side section yellow">Right Sidebar</div>
<footer class="section coral">Footer</footer>
</div>
CSS
.parent {
display: grid;
grid-template: auto 1fr auto / auto 1fr auto;
}
header {
padding: 2rem;
grid-column: 1 / 4;
}
.left-side {
grid-column: 1 / 2;
}
main {
grid-column: 2 / 3;
}
.right-side {
grid-column: 3 / 4;
}
footer {
grid-column: 1 / 4;
}