:root {
  --ink: #0a0a0a;
  --gold: #d4af37;
  --cream: #f8f4ed;
  --sub: #6b6b6b;
  --border: #e8d9a8;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
header {
  background: var(--ink);
  color: #fff;
  padding: 32px 0;
}
header .inner { max-width: 800px; margin: 0 auto; padding: 0 24px; }
.brand {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  text-decoration: none;
}
.brand .dot { color: var(--gold); }
h1 {
  font-size: 28px;
  margin: 16px 0 0;
  letter-spacing: -0.01em;
}
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
h2 { font-size: 20px; margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--border); }
h3 { font-size: 16px; margin-top: 24px; }
p, li { font-size: 15px; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
th, td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--cream); font-weight: 700; }
ul, ol { padding-left: 24px; }
hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
a { color: var(--gold); }
footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  font-size: 12px;
  color: var(--sub);
  text-align: center;
}
.meta { color: var(--sub); font-size: 13px; margin-top: 8px; }
.warn {
  background: #fff8e1;
  border-left: 4px solid var(--gold);
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 14px;
}
.toc-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 16px 0;
  display: block;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.2s;
}
.toc-card:hover { border-color: var(--gold); box-shadow: 0 4px 16px rgba(212,175,55,0.15); }
.toc-card h3 { margin: 0 0 8px; font-size: 18px; }
.toc-card p { margin: 0; color: var(--sub); font-size: 13px; }