body {
  display: grid;
  grid-template-columns: auto 120px;
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: aliceblue;
  color: black;
}

header {
  background-color: #333;
  color: white;
  padding: 10px;
  text-align: center;
}

nav {
  display: grid;
  background-color: #444;
  justify-content: center;
  gap: 10px;
  padding: 10px;
}

nav a {
  float: left;
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

nav a:hover {
  background-color: #555;
}

section {
  padding: 20px;
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 4px;
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
  position: relative;
  bottom: 0;
  width: 100%;
}

header, nav, section, footer {
 border: 2px solid red;
}

header {
  grid-column-start: 1;
  grid-column-end: 3;
  grid-row-start: 1;
  grid-row-end: 2;
}

nav {
  grid-column-start: 2;
  grid-column-end: 3;
  grid-row-start: 2;
  grid-row-end: 3;
}

section {
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 2;
  grid-row-end: 2;

}

footer {
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 3;
  grid-row-end: 4;
}