/* dark mode (default) */
body {
  color: white;
  background-color: black;
}

a {
  color: white;
}

a:hover {
  color: #aaf;
}

/* light mode */
@media (prefers-color-scheme: light) {
  body {
    color: black;
    background-color: whitesmoke;
  }

  a {
    color: #00f;
  }

  a:hover {
    color: #66f;
  }
}

/* other styles */
body {
  min-height: 100vh;
  margin: 0;
  font-size: 1.5em;
  border-left: 1em solid blue;
  border-top: 1px solid black;
}

main {
  border-top: 2px solid blue;
  border-bottom: 2px solid blue;
  padding-left: 1em;
  padding-right: 1em;
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.center {
  max-width: fit-content;
  margin-inline: auto;
}

.footer {
  font-size: 70%;
}