body {
  background-image: url("background.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

header, nav, main, footer {
  border: 2px solid black;
  padding: 10px;
}

.box {
  max-width: 1000px;
  margin: 100px 200px 300px;
  display: grid;
  grid-gap: 10px;
  grid-template-columns: 250px auto;
}

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

nav {
  grid-row: 2 / 3;
  grid-column: 1 / 2;
  height: max-content;
}

main {
  grid-row: 2 / 3;
  grid-column: 2 / 3;
  height: max-content;
}

footer {
  grid-row: 3 / 4;
  grid-column: 1 / 3;
}