:root {
  --ink: #16181d;
  --muted: #5b6270;
  --line: #e3e6eb;
  --accent: #d6336c;
  --bg: #ffffff;
  --soft: #f7f8fa;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
}
a { color: var(--accent); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
header.site {
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.logo { font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; letter-spacing: .04em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: .9rem; }
nav a:hover { color: var(--ink); }
.hero { padding: 72px 0 56px; }
.hero p.lead { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; line-height: 1.4; margin: 0 0 12px; }
.hero p.sub { color: var(--muted); margin: 0; }
section { padding: 40px 0; border-top: 1px solid var(--line); }
h1 { font-size: 1.8rem; margin: 48px 0 8px; }
h2 { font-size: 1.25rem; margin: 0 0 16px; }
h3 { font-size: 1.05rem; margin: 28px 0 8px; }
.card { background: var(--soft); border-radius: 10px; padding: 20px 24px; }
.card + .card { margin-top: 12px; }
.card h3 { margin-top: 0; }
table.info { width: 100%; border-collapse: collapse; }
table.info th, table.info td { text-align: left; vertical-align: top; padding: 12px 8px; border-bottom: 1px solid var(--line); }
table.info th { width: 9em; color: var(--muted); font-weight: 600; white-space: nowrap; }
.doc p, .doc li { color: #2b2f37; }
.doc ol, .doc ul { padding-left: 1.4em; }
.meta { color: var(--muted); font-size: .9rem; }
footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: .85rem; }
footer.site a { color: var(--muted); margin-right: 16px; }
@media (max-width: 560px) {
  nav a { margin-left: 12px; }
  table.info th { width: auto; display: block; border-bottom: none; padding-bottom: 0; }
  table.info td { display: block; padding-top: 4px; }
}