Address HTML5 warning

[rbdr/r.bdr.sh] / jekyll / css / application.css

html {
  font-size: 10px;
}

body {
  margin: 0;
  background-color: white;
  font-family: times, 'Times New Roman', serif;
}

header a, header a:visited {
  color: black;
}

h1, h2 {
  display: inline-block;
  margin-left: 1rem;
  font-weight: 300;
}

header {
  margin: -0.3em 0 0 -0.1em;
  font-size: 9.6em;
  font-style: italic;
  text-transform: uppercase;
}

h1, h2 {
  font-size: 4.8em;
}

a {
  color: blue;
}

a:visited {
  color: purple;
}

ul, p {
  font-size: 1.8rem;
  line-height: 1.28em;
  margin-left: 1em;
  max-width: 50em;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

li {
  display: block;
}

li p {
  display: inline-block;
  line-height: 1.82em;
  margin: 0;
}

span {
  display: inline;
  color: grey;
}

img,
video {
  display: block;
  max-width: 100vw;
}

header a, h1, h2, p {
  background-color: white;
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
  body {
    background-color: black;
    color: white;
  }

  header a, header a:visited {
    color: white;
  }

  a {
    color: #53FFFF;
  }

  a:visited {
    color: #FF55FF;
  }

  a[href^="telnet"] {
    color: #55FF55;
  }

  span {
    color: #FFEC27;
  }

  header a, h1, h2, p {
    background-color: black;
  }
}

/*
 * Mini header
 */
@media (max-width: 600px) {
  header {
    font-size: 4.8em;
  }
}

/*
 * Breadsticks
 */
canvas.background {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}