:root { --bg:#F5FBF5; --card:#fff; --ink:#171D19; --muted:#404943; --line:#C0C9C1; --primary:#2E7D5B; --tonal:#B8F0D0; --on-tonal:#00210F; --code:#EAF0EA; }
  @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg:#0F1511; --card:#171D19; --ink:#DFE4DE; --muted:#C0C9C1; --line:#404943; --primary:#9CD4B4; --tonal:#1F5139; --on-tonal:#B8F0D0; --code:#1F2621; } }
  :root[data-theme="dark"] { --bg:#0F1511; --card:#171D19; --ink:#DFE4DE; --muted:#C0C9C1; --line:#404943; --primary:#9CD4B4; --tonal:#1F5139; --on-tonal:#B8F0D0; --code:#1F2621; }
  * { box-sizing: border-box; }
  body { margin:0; background:var(--bg); color:var(--ink); font:16px/1.7 "IBM Plex Sans Arabic", system-ui, sans-serif; }
  main { max-width: 860px; margin: 0 auto; padding: 40px 16px 64px; }
  h1 { font-size: 2rem; font-weight: 600; margin: 0 0 4px; }
  h2 { font-size: 1.25rem; font-weight: 600; margin: 36px 0 12px; }
  .lead { color: var(--muted); margin: 0 0 28px; }
  .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
  a.card { display: block; padding: 18px 20px; background: var(--card); border: 1px solid var(--line); border-radius: 20px; color: inherit; text-decoration: none; transition: border-color .15s; }
  a.card:hover { border-color: var(--primary); }
  a.card.main { background: var(--tonal); color: var(--on-tonal); border-color: transparent; }
  .card b { display: block; font-weight: 600; margin-bottom: 2px; }
  .card span { font-size: .875rem; opacity: .8; }
  code, pre { font-family: ui-monospace, Consolas, monospace; font-size: .85rem; direction: ltr; unicode-bidi: isolate; }
  code { background: var(--code); padding: 1px 6px; border-radius: 6px; }
  pre { background: var(--code); padding: 14px 16px; border-radius: 12px; overflow-x: auto; text-align: left; }
  ol, ul { padding-inline-start: 22px; } li { margin: 4px 0; }
  .warn { background: var(--card); border: 1px solid var(--line); border-inline-start: 4px solid #B3261E; border-radius: 12px; padding: 12px 16px; }

  nav.toc { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 16px 20px; margin: 0 0 8px; }
  nav.toc ol { margin: 0; columns: 2; column-gap: 32px; } @media (max-width: 600px) { nav.toc ol { columns: 1; } }
  nav.toc a, main a { color: var(--primary); }
  table { width: 100%; border-collapse: collapse; font-size: .9rem; margin: 8px 0; display: block; overflow-x: auto; }
  th, td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: start; vertical-align: top; }
  th { font-weight: 600; background: var(--code); }
  td code { white-space: normal; overflow-wrap: anywhere; }
  h3 { font-size: 1.05rem; font-weight: 600; margin: 22px 0 8px; }
  .tip { background: var(--tonal); color: var(--on-tonal); border-radius: 12px; padding: 12px 16px; }
  .back { display: inline-block; margin-bottom: 16px; text-decoration: none; }
  .m { font-family: ui-monospace, Consolas, monospace; font-size: .75rem; font-weight: 700; padding: 1px 6px; border-radius: 6px; background: var(--code); direction: ltr; unicode-bidi: isolate; }