:root {
  color-scheme: dark;
  --ink: #000000;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--ink);
}

#rain {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

h1 {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}