:root {
  --bg: #f7f4ee;
  --surface: #fffdf8;
  --ink: #172026;
  --muted: #66716e;
  --line: #ddd6c8;
  --accent: #167a5b;
  --accent-soft: #e2f0e9;
  --deep: #09111f;
  --shadow: 0 18px 60px rgba(23, 32, 38, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(22, 122, 91, 0.08), transparent 30%),
    linear-gradient(180deg, var(--bg), #fbfaf6 52%, #f3f7f2);
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Yu Gothic UI",
    "Noto Sans JP", sans-serif;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-header {
  border-bottom: 1px solid rgba(23, 32, 38, 0.08);
  background: rgba(247, 244, 238, 0.86);
  backdrop-filter: blur(18px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, #167a5b, #5bbf95);
  box-shadow: 0 0 24px rgba(22, 122, 91, 0.28);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-copy strong {
  font-size: 0.96rem;
  letter-spacing: 0.02em;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.76rem;
}

.site-nav {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  font-size: 0.92rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--ink);
}

.site-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 54px 24px 88px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(260px, 0.48fr);
  gap: 48px;
  align-items: end;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 12ch;
  margin: 0;
  color: var(--deep);
  font-size: clamp(2.7rem, 8vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.lede {
  max-width: 42rem;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.9;
}

.meta-panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.72);
  box-shadow: var(--shadow);
}

.meta-panel dl {
  display: grid;
  gap: 14px;
  margin: 0;
}

.meta-panel dt {
  color: var(--muted);
  font-size: 0.78rem;
}

.meta-panel dd {
  margin: 3px 0 0;
  font-weight: 700;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(190px, 0.28fr) minmax(0, 0.72fr);
  gap: 48px;
  padding-top: 42px;
}

.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  display: grid;
  gap: 10px;
  padding: 18px 0;
}

.toc a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.toc a:hover {
  color: var(--accent);
}

.legal-stack {
  display: grid;
  gap: 28px;
}

.legal-section {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.legal-section h2 {
  margin: 0 0 12px;
  color: var(--deep);
  font-size: 1.26rem;
  line-height: 1.45;
}

.legal-section p,
.legal-section li {
  color: #35413e;
  line-height: 1.9;
}

.legal-section p {
  margin: 0;
}

.legal-section p + p,
.legal-section ul + p,
.legal-section p + ul {
  margin-top: 12px;
}

.legal-section ul {
  margin: 0;
  padding-left: 1.2rem;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.link-panel {
  display: block;
  min-height: 148px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.76);
  text-decoration: none;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.link-panel:hover {
  transform: translateY(-2px);
  border-color: rgba(22, 122, 91, 0.42);
  background: var(--surface);
}

.link-panel span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.link-panel strong {
  display: block;
  margin-top: 12px;
  font-size: 1.35rem;
}

.link-panel p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.notice {
  margin-top: 32px;
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  color: #28433a;
  line-height: 1.8;
}

.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 36px;
  color: var(--muted);
  font-size: 0.84rem;
}

@media (max-width: 820px) {
  .site-header-inner,
  .hero,
  .page-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .site-header-inner {
    align-items: flex-start;
  }

  .site-nav {
    gap: 12px;
  }

  .site-shell {
    padding-top: 38px;
  }

  .hero {
    gap: 28px;
  }

  .toc {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 0;
  }
}

@media (max-width: 520px) {
  .site-header-inner,
  .site-shell,
  .site-footer {
    padding-right: 18px;
    padding-left: 18px;
  }

  h1 {
    font-size: clamp(2.45rem, 17vw, 3.7rem);
  }

  .toc {
    grid-template-columns: 1fr;
  }
}