<div class="grid">
	<div class="item"></div>
	<div class="item"></div>
	<div class="item"></div>
	<div class="item"></div>
</div>
@import url("https://fonts.googleapis.com/css?family=Merriweather:700");

* {
	box-sizing: border-box;
}

body {
	background-color: #263238;
	font-family: Merriweather, serif;
	font-weight: 700;
	font-size: 1.8rem;
	margin: 0;
	padding: 40px;
	min-height: 100vh;
	display: flex;
	align-items: center;
}

.grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(20px, 300px)) 1fr;
	grid-template-rows: 300px;
	column-gap: 20px;
	width: 100%;
}

.item {
	background-color: #8BC34A;
}

.item:last-child {
	background-color: #EC407A;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.