@media (prefers-color-scheme: dark) {
  * {
    background-color: black;
    color: white;
  }
  html {
    background-image:
    radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
    radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
    radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px),
    radial-gradient(rgba(255,255,255,.4), rgba(255,255,255,.1) 2px, transparent 30px);
    background-size: 550px 550px, 350px 350px, 250px 250px, 150px 150px;
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
  }
}

@media (prefers-color-scheme: light) {
  * {
    background-color: white;
    color: black;
  }
}

h1, h2, h3 {
  font-family: monospace;
}

body {
  font-family: system-ui;
  padding: 1%;
  font-size: 18px;
  max-width: 75em;
  margin: auto;
  width: 75%;
  border: 3px solid lightgrey;
  border-radius: 5px;
}