* {
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: monospace;

  color: var(--fg);
  background-color: var(--bg);
}

a {
  color: var(--link);
  text-decoration: none;
  font-weight: bold;
}

a:visited {
  color: var(--link-visited);
}

header, footer {
  background-color: var(--bg-light);
  height: 150px;
}

footer {
  height: 50px;
}

header {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

header > h1 {
  padding: 0;
  margin: 0;
  text-align: center;
  font-size: 4.5em;
}

:is(header, footer) > nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 1.5em;
}

footer > nav {
  height: 100%;
  flex-direction: column;
}

footer > nav > a {
  margin: auto;
}

:is(header, footer) > nav > a::before {
  content: '< ';
}

:is(header, footer) > nav > a::after {
  content: ' >';
}

:is(header, footer) > nav > a:is(:hover, .active)::before {
  content: '\00a0>';
}

:is(header, footer) > nav > a:is(:hover, .active)::after {
  content: '<\00a0';
}

:is(header, footer) > nav > a:visited {
  color: var(--link);
}

main {
  min-height: calc(100vh - 200px);
}