:root {
  --bg: #fbf7f0;
  --surface: #ffffff;
  --text: #3d3631;
  --muted: #8b8178;
  --line: #eee5d8;
  --accent: #d8684e;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}
a { color: var(--accent); }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 32px 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 24px; }
ul, ol { padding-left: 1.4em; }
li { margin: 4px 0; }
.back { display: inline-block; margin-bottom: 16px; font-size: 14px; }
footer { margin-top: 48px; color: var(--muted); font-size: 13px; }