html.dark, body.dark {
  background-color: #1e1e1e;
  color: #eee;
}

html.light, body.light {
  background-color: #ffffff;
  color: #111;
}

body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

a {
  color: #4dabf7;
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  text-decoration: underline;
}

button#theme-toggle {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
}