:root {
  --bg: #0b0d12;
  --surface: #151924;
  --text: #f2f4f8;
  --muted: #a3abbd;
  --accent: #d4a24c;
  --line: #262c3a;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f7f5f0; --surface: #ffffff; --text: #16181d; --muted: #5b6272; --accent: #a8761f; --line: #e3ded3; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans Arabic", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 48px 16px 80px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
header .logo { width: 44px; height: 44px; border-radius: 10px; background: var(--accent); display: grid; place-items: center; font-weight: 800; color: #111; }
h1 { font-size: 30px; margin: 0; }
h2 { font-size: 21px; margin: 40px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, li { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--accent); }
nav { margin: 4px 0 28px; display: flex; gap: 18px; font-size: 15px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin: 16px 0; }
.rtl { direction: rtl; text-align: right; }
footer { margin-top: 56px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 18px; }
code { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 15px; }