:root {
  --bg: #ffffff; --fg: #1a1d23; --muted: #6a7180; --accent: #2b5fd9;
  --border: #e3e6eb; --code-bg: #f4f6f8; --maxw: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --fg: #e6e9ee; --muted: #9aa3b2; --accent: #7aa2ff;
          --border: #262a33; --code-bg: #171a21; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.7 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
header { border-bottom: 1px solid var(--border); }
header nav {
  max-width: var(--maxw); margin: 0 auto; padding: 0.9rem 1.25rem;
  display: flex; justify-content: space-between; align-items: center;
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 700;
         color: var(--fg); text-decoration: none; font-size: 1.05rem; }
nav .links a { color: var(--muted); text-decoration: none; margin-left: 1.15rem;
               font-size: 0.97rem; }
nav .links a:hover, .brand:hover span { color: var(--accent); }
main { max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.25rem 3.5rem; }
.hero { padding: 3rem 0 1.25rem; text-align: left; }
.hero-logo { margin-bottom: 0.75rem; }
.hero h1 { font-size: 2.3rem; line-height: 1.15; margin: 0 0 0.8rem;
           letter-spacing: -0.02em; }
.tagline { color: var(--muted); font-size: 1.18rem; margin: 0; max-width: 38rem; }
h1 { font-size: 1.75rem; letter-spacing: -0.015em; }
h2 { margin-top: 2.4rem; letter-spacing: -0.01em; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
article > h1 { margin-bottom: 0.3rem; }
.meta { color: var(--muted); font-size: 0.9rem; }
.series-note { color: var(--muted); font-style: italic; }
.post-list { list-style: none; padding: 0; margin-top: 0.75rem; }
.post-list li { display: flex; gap: 1rem; padding: 0.5rem 0;
                border-bottom: 1px solid var(--border); align-items: baseline; }
.post-list .meta { flex: 0 0 6.5rem; font-variant-numeric: tabular-nums; }
.post-list a { text-decoration: none; }
.post-list a:hover { text-decoration: underline; }
code { background: var(--code-bg); padding: 0.15em 0.4em; border-radius: 4px; font-size: 0.9em; }
pre { background: var(--code-bg); padding: 1rem 1.2rem; border-radius: 10px;
      overflow-x: auto; border: 1px solid var(--border); }
pre code { background: none; padding: 0; }
blockquote { border-left: 3px solid var(--accent); margin: 1.4rem 0;
             padding: 0.1rem 1.1rem; color: var(--muted); }
table { border-collapse: collapse; width: 100%; margin: 1.2rem 0; font-size: 0.95rem; }
th, td { border: 1px solid var(--border); padding: 0.45rem 0.65rem; text-align: left; }
th { background: var(--code-bg); }
hr { border: none; border-top: 1px solid var(--border); margin: 2.2rem 0; }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.foot-inner { max-width: var(--maxw); margin: 0 auto; padding: 1.4rem 1.25rem;
              display: flex; justify-content: space-between; }
.foot-links a { color: var(--muted); }
@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  nav .links a { margin-left: 0.8rem; }
}