header {
  text-align: center;
  background-color: lightyellow;
  border: 1px solid black;
}
nav {
  background-color: lightgray;
  border: 1px solid black;
}
main {
  background-color: lightgreen;
  border: 1px solid black;
}
footer {
  background-color: lightcyan;
  border: 1px solid black;
  text-align: center;
}
figure {
  background-color: lightcoral;
  border: 1px solid black;
}
figcaption {
  background-color: lightpink;
  border: 1px solid black;
}
details {
  background-color: lightgoldenrodyellow;
  border: 1px solid black;
}
summary {
  background-color: lightskyblue;
  border: 1px solid black;
  cursor: pointer;
}
article {
  background-color: lightseagreen;
  border: 1px solid black;
}
aside {
  background-color: lightsteelblue;
  border: 1px solid black;
}