:root {
  --bg: #0e1410;
  --bg-soft: #16211a;
  --bg-card: #101a14;
  --border: rgba(255, 255, 255, 0.12);
  --fg: #e9f2ec;
  --muted: #9db3a6;
  --accent: #34c07a;
  --accent-2: #1f9d63;
  --max: 860px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #69d79d; }
a:focus-visible { outline: 3px solid rgba(52, 192, 122, 0.45); outline-offset: 4px; border-radius: 4px; }
.wrap { width: min(100% - 40px, var(--max)); margin: 0 auto; }

header.site { border-bottom: 1px solid var(--border); background: rgba(14, 20, 16, 0.94); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px 0; }
.brand { display: flex; align-items: baseline; gap: 10px; color: var(--fg); text-decoration: none; }
.brand .logo { font-size: 19px; font-weight: 800; }
.brand .logo span { color: var(--accent); }
.brand .tag { color: var(--muted); font-size: 12px; }
nav { display: flex; gap: 18px; }
nav a { color: var(--fg); font-size: 14px; font-weight: 650; text-decoration: none; }
nav a:hover { color: var(--accent); }

main { padding: 58px 0 80px; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 13px; font-weight: 750; letter-spacing: 0.08em; }
h1 { margin: 0; font-size: clamp(30px, 5vw, 42px); line-height: 1.35; letter-spacing: 0.01em; }
.intro { max-width: 720px; margin: 18px 0 0; color: var(--muted); font-size: 16px; }
.updated { margin: 20px 0 0; color: var(--muted); font-size: 13px; }

.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 34px 0 8px;
}
.summary article, .contact-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-soft);
  padding: 18px;
}
.summary h2 { margin: 0 0 6px; font-size: 15px; }
.summary p { margin: 0; color: var(--muted); font-size: 13px; }

.content { margin-top: 44px; }
.content section { padding: 32px 0; border-top: 1px solid var(--border); }
.content h2 { margin: 0 0 14px; font-size: 22px; line-height: 1.45; }
.content h3 { margin: 24px 0 8px; font-size: 16px; }
.content p { margin: 10px 0; }
.content ul, .content ol { margin: 10px 0; padding-left: 1.5em; }
.content li + li { margin-top: 8px; }
.muted { color: var(--muted); }
.note {
  margin: 18px 0;
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  background: var(--bg-card);
  padding: 14px 16px;
}
.note p { margin: 0; }

.data-list { display: grid; gap: 12px; margin-top: 16px; }
.data-item { border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card); padding: 16px 18px; }
.data-item h3 { margin: 0 0 6px; }
.data-item p { margin: 0; color: var(--muted); font-size: 14px; }

.table-scroll { overflow-x: auto; margin: 14px 0; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; min-width: 620px; border-collapse: collapse; background: var(--bg-card); font-size: 14px; }
th, td { padding: 13px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--fg); background: var(--bg-soft); }
td { color: var(--muted); }
tr:last-child td { border-bottom: 0; }

.contact-card { margin-top: 18px; }
.contact-card strong { display: block; margin-bottom: 4px; }
.contact-card p { margin: 0; color: var(--muted); }
.contact-card .button {
  display: inline-block;
  margin-top: 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 700;
  padding: 10px 22px;
  text-decoration: none;
}

details { border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card); padding: 0 16px; }
details + details { margin-top: 10px; }
summary { cursor: pointer; padding: 15px 0; font-weight: 700; }
details p, details ul { color: var(--muted); font-size: 14px; }

footer.site { border-top: 1px solid var(--border); background: var(--bg-soft); }
footer.site .wrap { padding: 26px 0 34px; color: var(--muted); font-size: 12px; }
footer.site p { margin: 6px 0; }
footer.site a { color: var(--muted); }

@media (max-width: 700px) {
  header.site .wrap { align-items: flex-start; flex-direction: column; gap: 10px; }
  .brand .tag { display: none; }
  nav { width: 100%; justify-content: space-between; gap: 10px; }
  nav a { font-size: 13px; }
  main { padding-top: 40px; }
  .summary { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}