:root {
  --bg: #ffffff;
  --paper: #fbf7f4;
  --line: #f0e4df;
  --ink: #2b2a27;
  --sub: #7d776c;
  --muted: #9a948a;
  --rose: #c4807e;
  --rose-deep: #a66563;
  --partner: #8c7b6b;
  --maru: 'Kosugi Maru', 'Hiragino Maru Gothic ProN', sans-serif;
  --body: 'BIZ UDPGothic', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 15px; line-height: 1.9; -webkit-font-smoothing: antialiased; }
a { color: var(--rose); }
a:hover { color: var(--rose-deep); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--maru); font-size: 18px; }
.logo { position: relative; width: 34px; height: 22px; flex: none; }
.logo::before, .logo::after { content: ''; position: absolute; top: 0; width: 22px; height: 22px; border-radius: 50%; }
.logo::before { left: 0; background: var(--rose); }
.logo::after { right: 0; background: var(--partner); opacity: .85; }
header nav a { font-size: 13px; color: var(--sub); text-decoration: none; }
main { padding: 48px 0 72px; }
h1 { font-family: var(--maru); font-weight: 400; font-size: clamp(26px, 5vw, 32px); margin: 0 0 8px; }
.updated { color: var(--muted); font-size: 13px; margin: 0 0 32px; }
.intro { margin: 0 0 32px; }
h2 { font-family: var(--maru); font-weight: 400; font-size: 19px; margin: 40px 0 12px; padding-top: 20px; border-top: 1px solid var(--line); }
h3 { font-size: 15px; margin: 22px 0 6px; }
p { margin: 0 0 12px; }
ol, ul { margin: 0 0 12px; padding-left: 1.4em; }
li { margin: 4px 0; }
.note { background: var(--paper); border-radius: 16px; padding: 16px 18px; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 16px; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { font-weight: 700; white-space: nowrap; color: var(--sub); }
.table-scroll { overflow-x: auto; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 20px; justify-content: space-between; }
footer nav { display: flex; gap: 18px; }
footer nav a { color: var(--sub); text-decoration: none; }
footer nav a:hover { color: var(--ink); }