:root {
  --ink: #0f172a;
  --muted: #334155;
  --line: #cbd5e1;
  --bg: #f8fafc;
  --panel: #ffffff;
  --accent: #0f766e;
  --code-bg: #f1f5f9;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: linear-gradient(120deg, #f8fafc, #f1f5f9); font-family: "IBM Plex Sans", "Segoe UI", sans-serif; }
header, main, footer { max-width: 1080px; margin: 0 auto; padding: 1rem 1.25rem; }
header h1 { margin: 0; font-size: 1.8rem; }
header p { margin: .5rem 0 1rem; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .75rem; }
nav a { text-decoration: none; color: var(--ink); border: 1px solid var(--line); background: var(--panel); padding: .45rem .6rem; border-radius: .5rem; }
nav a.active { border-color: var(--accent); color: var(--accent); }
section, article { background: var(--panel); border: 1px solid var(--line); border-radius: .75rem; padding: 1rem; margin: .75rem 0; }
h2, h3 { margin-top: 0; }
code { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: .92em; background: var(--code-bg); padding: .06rem .25rem; border-radius: .25rem; }
pre code { display: block; padding: 1rem; overflow-x: auto; line-height: 1.4; }
table { width: 100%; border-collapse: collapse; margin-top: .5rem; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: .45rem; vertical-align: top; }
ul { padding-left: 1.2rem; }
footer { color: var(--muted); }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin-top: 1.4rem; }
.markdown-body h1:first-child, .markdown-body h2:first-child, .markdown-body h3:first-child { margin-top: 0; }
.markdown-body a { color: var(--accent); }