:root {
  --bg: #f7f7f4;
  --surface: #ffffff;
  --text: #1b1f1d;
  --muted: #5f6763;
  --border: #e3e5e1;
  --primary: #1f6f5c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111413;
    --surface: #1a1e1c;
    --text: #e9ecea;
    --muted: #a3aba7;
    --border: #2b312e;
    --primary: #4fbf9f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, "Segoe UI", Roboto, "Noto Sans Arabic", Tahoma, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 8px; }
.brand { color: var(--primary); font-weight: 800; font-size: 22px; text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-inline-start: 16px; font-size: 15px; }
nav a:hover { color: var(--primary); }
h1 { font-size: 30px; line-height: 1.2; margin: 24px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px 24px; margin: 16px 0; }
a { color: var(--primary); }
ul { padding-inline-start: 22px; }
li { margin: 4px 0; }
.lang-switch { margin: 8px 0 0; font-size: 15px; }
section[dir="rtl"] { text-align: right; }
.hero { text-align: center; padding: 32px 0 8px; }
.hero p { color: var(--muted); font-size: 18px; max-width: 520px; margin: 8px auto 0; }
footer { color: var(--muted); font-size: 14px; padding-top: 32px; padding-bottom: 40px; text-align: center; }
hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }