<div class="wrapper">
  <div class="box a">A</div>
  <div class="box b">B</div>
  <div class="box c">C</div>
  <div class="box d">
    <div class="box e">E</div>
    <div class="box f">F</div>
    <div class="box g">G</div>
  </div>
</div>
.wrapper {
  display: grid;
  grid-gap: 10px;
	grid-template-columns: repeat(4, [col] 150px ) ;
	grid-template-rows: repeat(2, [row] auto  );
}

.a {
  grid-column: col / span 2;
	grid-row: row;
}

.b {
  grid-column: col 3 / span 2;
	grid-row: row;
}

.c {
  grid-column: col / span 2;
	grid-row: row 2;
}

.d{
  grid-column: col 3 / span 2;
	grid-row: row 2;
	
  display: grid;
  grid-gap: 10px;
	grid-template-columns: 1fr 1fr;
}

.e {
  grid-column: 1 / 3;
	grid-row: 1;
}

.f {
  grid-column: 1;
	grid-row: 2;
}

.g {
  grid-column: 2;
	grid-row: 2;
}

body {
  margin: 20px;
}

.wrapper {
  background-color: #fff;
	color: #444;
  margin:auto;
  max-width: 600px;
}
.box {
  background-color: #444;
	color: #fff;
	border-radius: 5px;
	padding: 20px;
	font-size: 150%;
}

.box .box {
  background-color: #ccc;
	color: #444;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

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