:root { --bg:#161B22; --panel:#0D1117; --accent:#00FF41; --text:#C9D1D9; }
* { box-sizing:border-box; }
body { margin:0; background:var(--bg); color:var(--text);
  font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif; }
a { color:var(--accent); text-decoration:none; }
a:hover { text-decoration:underline; }
header { background:var(--panel); padding:1.2rem 1rem; border-bottom:1px solid #30363d; }
header .wrap, main, footer .wrap { max-width:860px; margin:0 auto; padding:0 1rem; }
header a.logo { font-size:1.4rem; font-weight:700; color:var(--text); }
header a.logo span { color:var(--accent); }
header p { margin:.2rem 0 0; opacity:.7; font-size:.95rem; }
main { padding:2rem 1rem 4rem; }
h1 { line-height:1.25; } h2 { margin-top:2.2rem; color:var(--accent); }
.card { background:var(--panel); border:1px solid #30363d; border-radius:8px;
  padding:1.1rem 1.3rem; margin:1rem 0; }
.card h3 { margin:.1rem 0 .4rem; }
.card p { margin:.3rem 0; opacity:.85; font-size:.95rem; }
.meta { opacity:.6; font-size:.85rem; }
.cat { text-transform:uppercase; letter-spacing:.08em; font-size:.75rem;
  color:var(--accent); }
details { background:var(--panel); border:1px solid #30363d; border-radius:6px;
  padding:.6rem 1rem; margin:.6rem 0; }
summary { cursor:pointer; font-weight:600; }
footer { border-top:1px solid #30363d; padding:1.5rem 0 3rem; font-size:.85rem;
  opacity:.7; }
footer a { margin-right:1.2rem; }
article img { max-width:100%; }
table { border-collapse:collapse; width:100%; } td,th { border:1px solid #30363d; padding:.5rem; }