:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #2c4a6b;
  --border: #e5e7eb;
  --max-width: 720px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 17px; line-height: 1.6; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 32px 20px;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: var(--max-width); margin: 0 auto; }
header {
  padding-bottom: 24px;
  margin-bottom: 40px;
  border-bottom: 3px solid var(--accent);
}
header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.3px;
}
header h1 a { color: inherit; text-decoration: none; }
header .tagline {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 6px;
}
nav {
  margin-top: 20px;
  font-size: 0.9rem;
}
nav a {
  color: var(--text);
  text-decoration: none;
  margin-right: 20px;
  font-weight: 500;
  transition: color 0.15s;
}
nav a:hover { color: var(--accent); }
main h2 {
  font-size: 1.35rem;
  margin: 32px 0 12px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.2px;
}
main h3 {
  font-size: 1.1rem;
  margin: 24px 0 10px;
  font-weight: 600;
  color: var(--text);
}
main p { margin-bottom: 18px; }
main a { color: var(--accent); font-weight: 500; }
main a:hover { text-decoration: underline; }
main ul, main ol { padding-left: 24px; margin-bottom: 18px; }
main li { margin-bottom: 6px; }
article time { color: var(--muted); font-size: 0.85rem; display: block; margin-bottom: 16px; }
.article-list { list-style: none; padding: 0; }
.article-list li { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.article-list li:last-child { border-bottom: none; }
.article-list a { font-size: 1.05rem; color: var(--accent); text-decoration: none; font-weight: 600; }
.article-list a:hover { text-decoration: underline; }
.article-list .excerpt { color: var(--muted); font-size: 0.9rem; margin-top: 4px; font-weight: 400; }
footer {
  margin-top: 64px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
footer a { color: var(--muted); }
footer p { margin-bottom: 6px; }
@media (max-width: 600px) {
  html { font-size: 16px; }
  body { padding: 20px 16px; }
  header h1 { font-size: 1.5rem; }
  nav a { margin-right: 14px; display: inline-block; padding: 4px 0; }
}