style.css

@custom-media --motionOK (prefers-reduced-motion: no-preference);

:root {
  color-scheme: dark light;
}

* {
  box-sizing: border-box;
  background-origin: border-box;
  background-repeat: no-repeat;
  margin: 0;
}

html {
  block-size: 100%;
}

body {
  min-block-size: 100%;

  display: grid;
  place-content: center;
  gap: 2ch;

  font-family: system-ui, sans-serif;
}