:root {
  --bg: #fbfaf7;
  --text: #2b2a28;
  --muted: #6b6760;
  --accent: #2f6f5e;
  --line: #e4e0d8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1d1c1a; --text: #ecebe7; --muted: #a8a49c; --accent: #7cc3ad; --line: #3a3834; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  line-height: 1.8;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.site-name { font-size: 1.4rem; font-weight: 700; color: var(--text); text-decoration: none; }
.site-tag { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 1.5rem; line-height: 1.4; }
h2 { font-size: 1.15rem; margin-top: 2em; }
a { color: var(--accent); }
footer { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: .85rem; }
footer nav a { margin-right: 16px; }
.pr-note { margin: 12px 0 0; }