:root {
  color-scheme: light;
  --paper: #F3EADA;
  --card: #FBF6EC;
  --ink: #241C17;
  --ink-2: #66584D;
  --rule: #DFD1BA;
  --shu: #C8372A;
  --serif: "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.8 var(--sans);
  overflow-wrap: anywhere;
}
header, main, footer { max-width: 800px; margin: 0 auto; padding: 24px; }
header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: var(--ink); font: 800 22px/1.4 var(--serif); letter-spacing: .12em; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; }
main { background: var(--card); border: 1px solid var(--rule); border-radius: 6px; }
h1 { margin: 0 0 12px; font: 800 clamp(24px, 5vw, 32px)/1.5 var(--serif); }
h2 { margin: 32px 0 8px; font-size: 20px; line-height: 1.6; }
h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 0 0 16px; }
ul { margin: 0 0 16px; padding-left: 24px; }
li + li { margin-top: 6px; }
a { color: var(--shu); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--shu); outline-offset: 3px; }
.updated, .notice, footer { color: var(--ink-2); font-size: 14px; }
.notice { padding: 16px; border-left: 3px solid var(--rule); }
footer p { margin: 0; }
@media (max-width: 848px) {
  main { margin: 0 16px; padding: 24px 20px; }
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #14100D;
    --card: #1D1511;
    --ink: #F1E6D2;
    --ink-2: #BBA88F;
    --rule: #382A22;
    --shu: #E2533F;
  }
}