/* 1 ページ分の最小のスタイル。JS は使わず、配色は OS のダークモードに追従する */
:root {
  --bg: #fbfbf9;
  --ink: #1f2430;
  --muted: #5c6370;
  --line: #e2e4e8;
  --accent: #0b7a75;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181f;
    --ink: #e6e9ef;
    --muted: #9aa3b2;
    --line: #2a313d;
    --accent: #4fd1c5;
    --card: #1b2029;
  }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
}
main { max-width: 44rem; margin: 0 auto; padding: 3rem 1rem 2rem; }
footer { max-width: 44rem; margin: 0 auto; padding: 1rem 1rem 3rem; color: var(--muted); border-top: 1px solid var(--line); font-size: .9rem; }
.eyebrow { margin: 0; color: var(--accent); font-weight: 600; letter-spacing: .05em; }
h1 { font-size: 1.9rem; line-height: 1.35; margin: .25rem 0 1rem; }
h2 { font-size: 1.25rem; margin: 2.5rem 0 .75rem; border-left: 4px solid var(--accent); padding-left: .6rem; }
h3 { font-size: 1.05rem; margin: 0 0 .25rem; }
.lead { font-size: 1.05rem; }
.parts { list-style: none; padding: 0; margin: 0; display: grid; gap: .75rem; }
.parts li { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: 1rem 1.1rem; }
.parts p { margin: 0; }
.ref { margin-top: .4rem; font-size: .9rem; }
a { color: var(--accent); }
code { font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; font-size: .92em; background: var(--line); padding: .05em .35em; border-radius: .3em; }