html {
  cursor: default;
  background-attachment: fixed;
  background-color: yellow;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  font-family: arial, helvetica, verdana, sans-serif;
  font-size: 1.5em;
  height: 3em;
  text-shadow: 2px 1px 3px black;
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
}

nav {
  top: 5%;
  visibility: hidden;
}

ul {
  text-align: center;
  margin-block-end: 0;
  margin-block-start: 1em;
  padding-inline-start: 0;
}

a {
  cursor: pointer;
  text-decoration: none;
}

li {
  color: coral;
  display: none;
  font-size: 2em;
}

header {
  display: inline;
  font-size: 1em;
  margin-block-end: 0;
  margin-block-start: 0;
  position: fixed;
  top: 0;
}

header a {
  color: lime;
}

header:first-child {
  right: 0;
}

figcaption {
  bottom: 50%;
  color: red;
  font-size: 10vw;
  position: fixed;
  text-align: center;
  visibility: visible;
  width: 100%;
}

div {
  color: white;
  font-size: 2.5em;
  position: fixed;
  top: 50%;
}

div a {
  display: none;
}

div:last-child {
  right: 0;
}