:root {
  --bg: #fbfaf7;
  --fg: #23211d;
  --muted: #6d675d;
  --rule: #e4e0d7;
  --link: #2f5d50;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#17181a; --fg:#e7e4de; --muted:#9a958b; --rule:#2d2f32; --link:#8fc3b1; }
}
* { box-sizing: border-box; }
html { direction: rtl; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, "Segoe UI", Tahoma, "Iranian Sans", "IRANSans", sans-serif;
  font-size: 16px;
  line-height: 1.95;
}
.wrap { max-width: 40rem; margin: 0 auto; padding: 2.5rem 1.1rem 4rem; }
header { border-bottom: 1px solid var(--rule); padding-bottom: 1rem; margin-bottom: 2rem; }
header h1 { font-size: 1.2rem; margin: 0 0 .2rem; }
header p { margin: 0; color: var(--muted); font-size: .9rem; }
nav { margin-top: .8rem; font-size: .92rem; }
nav a { margin-left: 1.1rem; }
a { color: var(--link); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover { border-bottom-color: currentColor; }
h2 { font-size: 1.3rem; line-height: 1.6; margin: 2.2rem 0 .4rem; }
h3 { font-size: 1.05rem; margin: 1.8rem 0 .4rem; }
p { margin: 1rem 0; text-align: justify; }
.date { color: var(--muted); font-size: .85rem; }
ul.index { list-style: none; padding: 0; margin: 0; }
ul.index li { padding: 1rem 0; border-bottom: 1px solid var(--rule); }
ul.index li p { margin: .3rem 0 0; color: var(--muted); font-size: .92rem; text-align: right; }
ul.index li a { font-size: 1.05rem; }
ul, ol { padding-right: 1.2rem; }
li { margin: .4rem 0; }
pre {
  direction: ltr; text-align: left;
  background: rgba(127,127,127,.09);
  padding: .8rem 1rem; overflow-x: auto; border-radius: 4px;
  font-size: .85rem; line-height: 1.6;
}
code { direction: ltr; unicode-bidi: embed; font-size: .9em; }
blockquote {
  margin: 1.2rem 0; padding-right: 1rem;
  border-right: 3px solid var(--rule); color: var(--muted);
}
footer { margin-top: 3.5rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: .85rem; }