:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --ink: #1f2528;
  --muted: #667176;
  --line: #dcded8;
  --card: #ffffff;
  --accent: #0b6f63;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Avenir Next", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
}

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

.site-shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 247, 244, 0.92);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  display: block;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 6px 8px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

.language-switch a {
  color: var(--muted);
  text-decoration: none;
}

.language-switch span {
  color: var(--ink);
  padding: 4px 8px;
  background: #eceee8;
  border-radius: 999px;
}

.nav-language {
  margin: 0;
}

.hero {
  padding: 56px 0 32px;
}

.hero-grid {
  display: block;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1 {
  margin: 14px 0 16px;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero-copy {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--card);
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  color: white;
  background: var(--ink);
  border-color: var(--ink);
}

.button-secondary {
  color: var(--ink);
}

.section {
  padding: 22px 0 64px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.info-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.info-card h2,
.info-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.info-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.document {
  padding: 34px 0 72px;
}

.document-card {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(22px, 5vw, 44px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.document-card h1 {
  margin-top: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.12;
}

.document-card h2 {
  margin: 36px 0 12px;
  padding-top: 4px;
  font-size: 1.25rem;
}

.document-card h3 {
  margin: 24px 0 8px;
}

.document-card p,
.document-card li {
  color: var(--muted);
  line-height: 1.85;
}

.document-card ul {
  padding-left: 1.2rem;
}

.meta {
  color: var(--muted);
  font-weight: 700;
}

.site-footer {
  padding: 28px 0 38px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 38px;
  }
}