:root {
  --bg: #faf8f4;
  --surface: #ffffff;
  --ink: #23201c;
  --muted: #6b645b;
  --line: #e6e0d6;
  --accent: #2f6f5e;
  --accent-soft: #e4efe9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1a18;
    --surface: #242320;
    --ink: #eeeae3;
    --muted: #a8a197;
    --line: #3a3833;
    --accent: #7cc1a8;
    --accent-soft: #263631;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  line-height: 1.85;
  font-size: 16px;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 700; font-size: 20px; letter-spacing: .08em;
  color: var(--ink); text-decoration: none;
}
.logo span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; margin-left: 18px; }
nav a:hover { color: var(--ink); }
.hero { padding: 72px 0 48px; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .12em;
  color: var(--accent); background: var(--accent-soft);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(28px, 6vw, 40px); line-height: 1.4; margin: 0 0 20px; letter-spacing: .04em; }
.hero p { color: var(--muted); margin: 0; max-width: 34em; }
section.block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px 28px;
  margin-bottom: 24px;
}
section.block h2 {
  font-size: 19px; margin: 0 0 16px; padding-left: 12px;
  border-left: 4px solid var(--accent); line-height: 1.5;
}
ol.policy { padding-left: 1.4em; margin: 0; }
ol.policy li { margin-bottom: 10px; }
ol.policy strong { display: block; }
.note { font-size: 14px; color: var(--muted); }
dl.info { display: grid; grid-template-columns: 8em 1fr; gap: 10px 16px; margin: 0; }
dl.info dt { color: var(--muted); }
dl.info dd { margin: 0; }
article.doc h1 { font-size: 26px; margin: 56px 0 24px; }
article.doc h2 { font-size: 18px; margin: 32px 0 8px; }
article.doc p, article.doc li { color: var(--ink); }
footer.site {
  margin-top: 56px; padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  font-size: 13px; color: var(--muted);
}
footer.site a { color: var(--muted); margin-right: 16px; }
@media (max-width: 520px) {
  nav a { margin-left: 12px; font-size: 13px; }
  section.block { padding: 24px 18px; }
  dl.info { grid-template-columns: 1fr; gap: 2px; }
  dl.info dd { margin-bottom: 10px; }
}