body {
  margin: 0;
}
nav {
  border-bottom: 1px solid #ccc;
  padding: 1em;
}
nav ul {
  list-style-type: none;
  display: flex;
  gap: 1em;
  margin-block: 0;
}
main {
  padding: 1em;
}
h1 {
  text-decoration: underline;
}
footer {
  margin-inline: auto;
  width: fit-content;
}