:root {
  color-scheme: light;
}

body {
  margin: 0;
  background: #ffffff;
  color: #1e1e1e;
  font-family:
    system-ui, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP',
    sans-serif;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

main,
footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

main {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.4;
  margin: 0 0 1.5rem;
}

h2 {
  font-size: 1.25rem;
  line-height: 1.5;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1rem;
  line-height: 1.6;
  margin: 1.75rem 0 0.25rem;
}

a {
  color: inherit;
}

.source,
footer {
  color: #70706d;
  font-size: 0.875rem;
}

footer {
  padding-bottom: 3rem;
}