:root {
  color-scheme: light dark;
}

body {
  font-family: system-ui, sans-serif;
  font-size: 1.2em;
  max-width: 640px;
  padding: 0 1em;
  margin: 0 auto 3em;
  line-height: 1.35;
}

h1, h2 {
  border-bottom: 1px solid rgba(128, 128, 128, 0.25);
  padding-bottom: 0.1em;
}

img {
  max-width: 100%;
}

.logo {
  width: 48px;
  height: 48px;
  vertical-align: sub;
}