:root {
  color-scheme: light;
  --background: #f7f2eb;
  --surface: #fffdf9;
  --text: #2f241d;
  --muted: #6f6259;
  --accent: #8b4f2f;
  --accent-dark: #66371f;
  --line: #e7d9cc;
  --note: #f1e5d8;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Noto Sans JP", sans-serif;
  font-size: 17px;
  line-height: 1.72;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(196, 139, 92, 0.15), transparent 30rem),
    var(--background);
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

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

a:focus-visible {
  outline: 3px solid rgba(139, 79, 47, 0.35);
  outline-offset: 3px;
  border-radius: 0.2rem;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.9);
}

.header-inner,
main,
.site-footer {
  width: min(100% - 2rem, 760px);
  margin-inline: auto;
}

.header-inner {
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 0.7rem;
  color: #fff;
  background: var(--accent);
  font-size: 1.05rem;
}

.language-link {
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: 650;
}

main {
  padding-block: clamp(2.5rem, 8vw, 5rem);
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.3;
  text-wrap: balance;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.35rem);
  letter-spacing: -0.035em;
}

.lead {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.meta {
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.summary {
  margin: 2rem 0 0;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--note);
}

.summary strong {
  display: block;
  margin-bottom: 0.2rem;
}

.content {
  margin-top: 3rem;
}

section + section {
  margin-top: 2.75rem;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.42rem;
}

h3 {
  margin: 1.4rem 0 0.45rem;
  font-size: 1.05rem;
}

p,
ul {
  margin-block: 0.7rem;
}

ul {
  padding-left: 1.35rem;
}

li + li {
  margin-top: 0.4rem;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.data-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--surface);
}

.data-card h3 {
  margin: 0 0 0.35rem;
}

.data-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 0.8rem;
  color: #fff;
  background: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  color: #fff;
  background: var(--accent-dark);
}

.button.secondary {
  color: var(--accent-dark);
  background: transparent;
}

.button.secondary:hover {
  color: var(--accent-dark);
  background: var(--note);
}

.site-footer {
  padding-block: 1.8rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 600px) {
  :root {
    font-size: 16px;
  }

  .header-inner,
  main,
  .site-footer {
    width: min(100% - 1.5rem, 760px);
  }

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

  .button {
    width: 100%;
  }
}

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