:root {
  color-scheme: light;
  --ink: #342c27;
  --muted: #756b63;
  --accent: #ff984a;
  --paper: #fffdf9;
  --wash: #fff3e9;
  --line: #eadfd7;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Segoe UI", sans-serif;
  line-height: 1.75;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 176, 116, 0.22), transparent 32rem),
    radial-gradient(circle at 85% 12%, rgba(255, 218, 190, 0.30), transparent 28rem),
    #faf7f4;
  overflow-wrap: anywhere;
}

main {
  width: min(960px, calc(100% - 32px));
  margin: 40px auto;
  padding: clamp(24px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 253, 249, 0.96);
  box-shadow: 0 24px 80px rgba(65, 45, 32, 0.10);
}

h1, h2, h3 {
  line-height: 1.3;
  color: var(--ink);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 6vw, 52px);
}

h2 {
  margin: 48px 0 14px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: clamp(24px, 4vw, 32px);
}

h3 {
  margin: 30px 0 8px;
  font-size: 20px;
}

p, ul { margin: 0 0 16px; }
ul { padding-left: 1.35em; }
a { color: #b95c19; font-weight: 700; }

.brand {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--muted);
  text-decoration: none;
}

.lead {
  margin: 12px 0 24px;
  color: var(--muted);
  font-size: 17px;
}

.meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 14px;
}

.language-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 24px 0 34px;
}

.language-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--wash);
  text-decoration: none;
}

.section { scroll-margin-top: 24px; }

.related {
  margin-top: 44px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--wash);
}

footer {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 560px) {
  main {
    width: min(960px, calc(100% - 20px));
    margin: 10px auto;
    border-radius: 14px;
  }

  h1 { font-size: 32px; }
}