:root {
  --navy: #07172f;
  --brand: #1677ff;
  --brand-soft: #e8f1ff;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --ink: #0b1220;
  --muted: #5d6878;
  --line: #e3e8f0;
  --shadow: 0 10px 28px rgba(7, 23, 47, 0.06);
  --radius: 14px;
  --font: "Segoe UI", "Avenir Next", Tahoma, "Noto Sans Arabic", "Noto Naskh Arabic", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--ink); line-height: 1.6; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.side {
  background: var(--navy); color: #eef3fb; padding: 20px 16px;
  position: sticky; top: 0; height: 100vh; overflow: auto;
}
.side strong { display: block; font-size: 1.1rem; margin-bottom: 12px; letter-spacing: -0.02em; }
.side .search, .side input {
  width: 100%; border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.06);
  color: #fff; border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; min-height: 42px;
}
.side a {
  display: block; color: rgba(238,243,251,0.88); text-decoration: none;
  padding: 8px 10px; border-radius: 10px; font-weight: 600; font-size: 0.92rem;
}
.side a:hover { background: rgba(22,119,255,0.22); color: #fff; }
.top {
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  padding: 16px 28px; border-bottom: 1px solid var(--line); background: rgba(247,249,252,0.92);
  position: sticky; top: 0; z-index: 10; flex-wrap: wrap;
}
.top a { font-weight: 650; }
.top button, .menu, .copy, [data-lang] {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface); color: var(--ink); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 12px; min-height: 38px; font-weight: 700; cursor: pointer;
}
[data-lang] { background: var(--brand); color: #fff; border-color: var(--brand); }
.content { padding: 22px 28px 56px; max-width: 860px; }
.callout, section, .card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.callout { background: var(--brand-soft); border-color: #c9dcff; }
h1, h2 { letter-spacing: -0.02em; margin: 0 0 10px; color: var(--ink); }
h1 { font-size: 1.8rem; }
h2 { font-size: 1.25rem; }
p, li { color: var(--muted); }
.toc { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 10px; }
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  direction: ltr; unicode-bidi: isolate;
}
pre {
  background: #0b1220; color: #eef3fb; border-radius: 12px; padding: 14px; overflow: auto;
}
.menu { display: none; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side {
    position: fixed; inset-block: 0; inset-inline-start: 0; z-index: 40; width: min(280px, 86vw);
    transform: translateX(-105%); transition: transform .2s ease;
  }
  html[dir="rtl"] .side { transform: translateX(105%); }
  .side.open { transform: none; }
  .menu { display: inline-flex; }
  .top, .content { padding-inline: 16px; }
}