:root {
  --bg: #fdfbf7;
  --text: #3a3532;
  --muted: #8a817b;
  --accent: #c96f5e;
  --card-bg: #ffffff;
  --border: #e8e1d8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #201d1b;
    --text: #e8e2dc;
    --muted: #9c948d;
    --accent: #e09080;
    --card-bg: #2a2624;
    --border: #3a3532;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.9;
  font-size: 16px;
}
.site-header {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 0.5rem;
}
.site-header a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}
.site-header.home a { font-size: 1.6rem; }
.tagline { color: var(--muted); font-size: 0.92rem; margin-top: 0.75rem; }
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}
h1 { font-size: 1.55rem; line-height: 1.5; margin: 1rem 0 0.25rem; }
h2 { font-size: 1.2rem; margin-top: 2.5rem; padding-bottom: 0.3rem; border-bottom: 2px solid var(--border); }
h3 { font-size: 1.05rem; margin-top: 2rem; color: var(--accent); }
a { color: var(--accent); }
.post-date { color: var(--muted); font-size: 0.88rem; margin-bottom: 2rem; }
.card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
  text-decoration: none;
  color: var(--text);
}
.card h2 { border: none; margin: 0.25rem 0; font-size: 1.1rem; padding: 0; }
.card p { color: var(--muted); font-size: 0.9rem; margin: 0.25rem 0 0; }
.card-date { color: var(--muted); font-size: 0.82rem; }
blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--card-bg);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
}
table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.92rem; }
th, td { border: 1px solid var(--border); padding: 0.5rem 0.75rem; text-align: left; vertical-align: top; }
th { background: var(--card-bg); }
.table-wrap { overflow-x: auto; }
.site-footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.post-footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); font-size: 0.92rem; }