:root {
  --bg: #ffffff;
  --surface: #f6f6f4;
  --text: #1f1f1f;
  --muted: #5f5f5f;
  --border: #e2e2dd;
  --accent: #8a6d33;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --surface: #151515;
    --text: #ececec;
    --muted: #9a9a9a;
    --border: #2a2a2a;
    --accent: #c8a96e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header.site {
  border-bottom: 1px solid var(--border);
  padding: 16px;
}

header.site a {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
}

h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 40px 0 8px; padding-top: 8px; border-top: 1px solid var(--border); }
h3 { font-size: 1rem; margin: 24px 0 4px; }
p, li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.4em; }

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

.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 24px; }

.box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
}

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--border); }
th { white-space: nowrap; color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }

footer.site {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  padding: 24px 16px;
  text-align: center;
}