:root {
  --text: #222;
  --muted: #6b6b6b;
  --accent: #5025d1;
  --border: #e3e3e9;
  --bg-soft: #f7f7fa;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", sans-serif;
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  line-height: 1.65;
  color: var(--text);
  background: #fff;
}
a { color: var(--accent); }
a:hover { text-decoration: underline; }
header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}
header h1 { margin: 0; font-size: 1.6rem; }
header h1 a { color: var(--text); text-decoration: none; }
.tagline { color: var(--muted); margin: 0.25rem 0 0.75rem; font-size: 0.95rem; }
nav a { margin-right: 0.75rem; font-size: 0.9rem; }
main section { margin-bottom: 2.5rem; }
main h2 { font-size: 1.35rem; border-left: 3px solid var(--accent); padding-left: 0.6rem; }
main article {
  padding: 1rem 1.1rem;
  background: var(--bg-soft);
  border-radius: 6px;
  margin-bottom: 1rem;
}
main article h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.meta { color: var(--muted); font-size: 0.85rem; margin: 0 0 0.6rem; }
footer {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}