:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #17202b;
  --muted: #55606e;
  --line: #dde3ea;
  --accent: #036a4d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1318;
    --card: #171c23;
    --text: #e8edf3;
    --muted: #b8bfc9;
    --line: #2a313b;
    --accent: #4ade9d;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 system-ui, -apple-system, "Segoe UI", Tahoma, "Noto Sans Arabic", sans-serif;
}
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}
article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px clamp(16px, 4vw, 40px);
}
h1 {
  font-size: 1.6rem;
  line-height: 1.3;
  margin: 0 0 4px;
}
h2 {
  font-size: 1.15rem;
  margin: 28px 0 8px;
}
h3 {
  font-size: 1rem;
  margin: 16px 0 4px;
  color: var(--muted);
}
ul,
ol {
  padding-inline-start: 1.4em;
}
a {
  color: var(--accent);
}
.meta {
  color: var(--muted);
  font-size: 0.9rem;
}
.lang {
  text-align: center;
  margin-bottom: 16px;
  font-size: 0.95rem;
}
hr {
  border: 0;
  margin: 24px 0;
}