body {
  background-color: #3b404e;
}
.wrapper {
  font-family: "PT Sans";
  display: flex;
  justify-content: center;
  border: 1px solid #ff4136;
  padding: 30px;
}

.grid {
  display: grid;
  border: 1px solid black;
  max-width: 800px;
  grid-template-columns: 4fr 8fr;
  grid-gap: 20px;
  padding: 30px;
  background-color: #fff;
}

.content,
.sidebar,
.ad {
  font-size: 14px;
  border: 1px dotted #0074d9;
  background-color: #e5f1fb;
}

p {
  padding: 0;
  margin: 0;
}

.wrapper,
.grid,
.sidebar,
.content,
.ad {
  position: relative;
}

.wrapper:after,
.grid:after,
.sidebar:after,
.content:after,
.ad:after {
  position: absolute;
  text-transform: uppercase;
  left: 0;
  top: 0;
  color: white;
  padding: 5px;
  font-size: 12px;
}

.grid:after {
  content: "grid";
  background-color: #222;
}

.sidebar:after {
  content: "sidebar";
  background-color: #0074d9;
}

.ad:after {
  content: "ad";
  background-color: #0074d9;
}

.content:after {
  content: "content";
  background-color: #0074d9;
}

.wrapper:after {
  content: "wrapper";
  background-color: #ff4136;
}