/* アプリと同じ世界観 (SPEC §5.2): 生成り・墨色・セリフ体・細罫線のみ。
   面ボタンも彩度の高い色も使わない。 */
:root {
  --paper: #f5f1e8;
  --ink: #1a1a1a;
  --rule: rgba(26, 26, 26, 0.28);
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--paper); color: var(--ink);
  font-family: "New York", "Iowan Old Style", Palatino, Georgia,
               "Hiragino Mincho ProN", "Yu Mincho", serif;
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}
.page { max-width: 40rem; margin: 0 auto; padding: 3.5rem 1.5rem 5rem; }
.brand {
  display: block; text-align: center;
  font-size: 0.78rem; letter-spacing: 0.28em; text-transform: uppercase;
  text-decoration: none; color: var(--ink); opacity: 0.75;
}
h1 {
  margin: 2.6rem 0 0.4rem; text-align: center;
  font-size: 1.12rem; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
}
.updated { text-align: center; font-size: 0.78rem; opacity: 0.6; margin: 0 0 2.4rem; }
hr { border: none; border-top: 1px solid var(--rule); margin: 2.6rem 0; }
h2 {
  margin: 2.4rem 0 0.6rem;
  font-size: 0.82rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase; opacity: 0.85;
}
p, li { font-size: 0.95rem; }
ul { padding-left: 1.15rem; }
li { margin: 0.35rem 0; }
a { color: var(--ink); text-underline-offset: 3px; }
.lede { font-size: 1.02rem; }
.lang-switch { text-align: center; font-size: 0.8rem; letter-spacing: 0.1em; opacity: 0.7; }
.foot {
  margin-top: 3.2rem; padding-top: 1.4rem; border-top: 1px solid var(--rule);
  text-align: center; font-size: 0.78rem; opacity: 0.62;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #14161a; --ink: #e8e4dc; --rule: rgba(232, 228, 220, 0.24); }
}