:root {
  color-scheme: light;
  --ink: #1f2933;
  --muted: #667085;
  --line: #d9e2ec;
  --soft: #f5f8fb;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --warn: #b45309;
  --white: #fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.8;
  background: var(--white);
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: .08em;
  text-underline-offset: .2em;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 20px 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #facc15;
  color: #713f12;
  font-weight: 700;
}

.brand strong {
  display: block;
  font-size: 1.25rem;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: .85rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 16px;
}

.site-nav a {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--ink);
  text-decoration: none;
  font-size: .92rem;
}

.site-nav a[aria-current="page"] {
  border-color: var(--accent);
  background: #ecfdf5;
  color: var(--accent-dark);
}

.site-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 34px 20px 56px;
}

.hero {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr);
  align-items: center;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.hero h1,
.page h1 {
  margin: 0 0 14px;
  line-height: 1.35;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
}

.lead {
  color: #344054;
  font-size: 1.08rem;
}

.hero-panel {
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 20px;
}

.hero-panel ul,
.card ul,
.page ul {
  padding-left: 1.4em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 6px;
  padding: 9px 16px;
  background: var(--accent);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  background: var(--white);
  color: var(--accent-dark);
  border: 1px solid var(--accent);
}

.section {
  margin-top: 46px;
}

.section h2,
.page h2 {
  margin: 0 0 14px;
  line-height: 1.45;
  font-size: 1.45rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: var(--white);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.note {
  border-left: 4px solid var(--accent);
  background: #f0fdfa;
  padding: 14px 16px;
  color: #134e4a;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
}

.info-table th,
.info-table td {
  border: 1px solid var(--line);
  padding: 12px;
  vertical-align: top;
}

.info-table th {
  width: 28%;
  text-align: left;
  background: var(--soft);
}

.page {
  max-width: 860px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--soft);
  padding: 24px 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 18px;
}

.copyright {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 760px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 22px;
  }

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

  .site-nav {
    gap: 6px;
  }

  .site-nav a {
    flex: 1 1 auto;
    text-align: center;
  }

  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }
}