:root {
  --bg: #fbfaf7;
  --text: #1f2328;
  --muted: #5b6168;
  --line: #dcd8cf;
  --accent: #2f6f4e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17191c;
    --text: #e8e6e1;
    --muted: #a3a7ad;
    --line: #34383d;
    --accent: #8fcfa9;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.8;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; padding-top: 16px; border-top: 1px solid var(--line); }
h3 { font-size: 1rem; margin: 20px 0 4px; }
p, li { overflow-wrap: anywhere; }
a { color: var(--accent); }

.lead { color: var(--muted); margin: 0 0 24px; }
.lang { margin-top: 48px; padding-top: 8px; border-top: 3px double var(--line); }
.badge { margin: 0 0 0 -36px; }
.badge img { height: 88px; width: auto; display: block; }

nav, footer {
  font-size: 0.92rem;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}
nav { margin-bottom: 24px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); }