:root {
  --ink: #1a1a1a; --paper: #faf7f0; --bg: #f4f1ea; --line: #d8d3c7;
  --accent: #d4341f; --soft: #4a4740;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #f0ede6; --paper: #1e1d1b; --bg: #141412; --line: #3a3833; --soft: #a8a49a; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink); line-height: 1.85;
  font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Noto Sans JP', sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 56px 22px 80px; }
header { border-bottom: 3px solid var(--ink); padding-bottom: 22px; margin-bottom: 36px; }
.mark {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'Hiragino Mincho ProN', 'Yu Mincho', serif; font-weight: 800;
  font-size: 20px; letter-spacing: 0.06em; text-decoration: none; color: var(--ink);
}
.mark .seal {
  width: 30px; height: 30px; background: var(--ink); color: var(--paper);
  display: grid; place-items: center; font-size: 16px;
}
h1 {
  font-family: 'Hiragino Mincho ProN', 'Yu Mincho', serif; font-weight: 800;
  font-size: clamp(28px, 6vw, 38px); letter-spacing: 0.02em; margin: 18px 0 6px;
}
.updated {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 12px;
  letter-spacing: 0.1em; color: var(--soft);
}
h2 {
  font-family: 'Hiragino Mincho ProN', 'Yu Mincho', serif; font-weight: 800;
  font-size: 20px; margin: 40px 0 12px; padding-top: 22px; border-top: 1px solid var(--line);
}
h2:first-of-type { border-top: none; padding-top: 0; }
h3 { font-size: 15px; font-weight: 700; margin: 26px 0 10px; }
p, li { font-size: 15px; }
.note { font-size: 13.5px; color: var(--soft); margin: -6px 0 18px; }
p { margin: 0 0 14px; }
ul { padding-left: 1.3em; margin: 0 0 14px; }
li { margin-bottom: 7px; }
strong { font-weight: 700; }
a { color: var(--accent); }
.lead {
  background: var(--paper); border-left: 3px solid var(--accent);
  padding: 16px 18px; margin: 0 0 30px; font-size: 15px;
}
.box { background: var(--paper); border: 1px solid var(--line); padding: 16px 18px; margin: 0 0 18px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 0 0 18px; }
th, td { text-align: left; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; letter-spacing: 0.1em; color: var(--soft); font-weight: 600; text-transform: uppercase; }
footer {
  margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--line);
  font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 11.5px;
  letter-spacing: 0.08em; color: var(--soft);
}
footer a { margin-right: 14px; }