:root{
  --bg:#0b0d10; --fg:#e8f0f2; --muted:#b6c2c9; --brand:#26d0ce;
  --card:#12161a; --accent:#ffd166; --link:#82d4f2;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;line-height:1.5}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1040px;margin:0 auto;padding:1.25rem}
.site-header,.site-footer{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;background:#0d1117;border-bottom:1px solid #1f2a33}
.site-footer{border-top:1px solid #1f2a33;border-bottom:none}
.top-nav a{margin-left:1rem;color:var(--muted)}
.top-nav a[aria-current="page"]{color:var(--fg);font-weight:600}
.hero{text-align:center;padding:1rem}
.hero .lead{color:var(--muted)}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap;justify-content:center;margin:1rem 0}
.btn{display:inline-block;padding:.75rem 1rem;border-radius:.65rem;border:1px solid #2b3740}
.btn.primary{background:linear-gradient(135deg,var(--brand),#1a9cb7);color:#061015;font-weight:700}
.btn.secondary{background:#141b22}
.btn.tiny{padding:.35rem .6rem;font-size:.9rem}
.highlights{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:1.5rem}
.card{background:var(--card);padding:1rem;border-radius:1rem;border:1px solid #1e2630}
.article h1{font-size:2rem;margin-top:.5rem}
.byline{color:var(--muted)}
.article-nav{margin:2rem 0}
blockquote.tip{border-left:.35rem solid var(--accent);padding:.5rem 1rem;background:#191e24;border-radius:.5rem}
.authors .author-card{display:flex;gap:1rem;align-items:center;background:var(--card);border:1px solid #1e2630;border-radius:1rem;padding:1rem;margin:.75rem 0}
img{height:auto}