:root {
  --bg: #fffdf9;
  --text: #2b2420;
  --muted: #6e625a;
  --accent: #e8590c;
  --line: #eadfd6;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1815;
    --text: #f3ece6;
    --muted: #a99d94;
    --accent: #ff8a4c;
    --line: #3a322c;
    --card: #25201c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.8;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 20px 72px; }
header.site { max-width: 720px; margin: 0 auto; padding: 20px 20px 0; font-weight: 700; letter-spacing: .08em; }
header.site a { color: var(--accent); text-decoration: none; }
h1 { font-size: 1.6rem; margin: 0 0 4px; line-height: 1.4; }
h2 { font-size: 1.15rem; margin: 2.2em 0 .5em; padding-bottom: .3em; border-bottom: 1px solid var(--line); }
p, li { font-size: .98rem; }
.meta { color: var(--muted); font-size: .85rem; margin: 0 0 28px; }
ul { padding-left: 1.3em; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; margin: 14px 0; }
.card h3 { margin: 0 0 4px; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); }
footer { max-width: 720px; margin: 0 auto; padding: 0 20px 40px; color: var(--muted); font-size: .8rem; }