@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
  --ink: #131A24;
  --paper: #FBFAF7;
  --signal: #E8A33D;
  --plate: #1F4B8E;
  --rule: #DDD8CE;
  --muted: #5C6570;
  --measure: 64ch;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

body[dir="rtl"] {
  font-family: 'IBM Plex Sans Arabic', system-ui, sans-serif;
  line-height: 1.9;
}

/* ---------- header ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.masthead-inner {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 22px 24px 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-decoration: none;
}

.wordmark::after {
  content: "";
  display: block;
  height: 3px;
  width: 100%;
  margin-top: 5px;
  background: var(--signal);
  border-radius: 2px;
}

.langtoggle {
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  padding: 5px 13px;
  border-radius: 999px;
  cursor: pointer;
}

.langtoggle:hover { border-color: var(--ink); color: var(--ink); }
.langtoggle:focus-visible { outline: 2px solid var(--plate); outline-offset: 2px; }

/* ---------- document ---------- */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

body[dir="rtl"] h1 { line-height: 1.4; letter-spacing: 0; }

.updated {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 44px;
}

h2 {
  font-size: 1.16rem;
  font-weight: 600;
  margin: 44px 0 12px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}

h2 .num {
  color: var(--signal);
  font-variant-numeric: tabular-nums;
  margin-inline-end: 10px;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 26px 0 8px;
}

p { margin: 0 0 16px; }

ul { margin: 0 0 18px; padding-inline-start: 22px; }
li { margin-bottom: 9px; }

a { color: var(--plate); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:focus-visible { outline: 2px solid var(--plate); outline-offset: 2px; }

strong { font-weight: 600; }

/* ---------- callout ---------- */

.callout {
  border-inline-start: 3px solid var(--signal);
  background: #fff;
  padding: 18px 22px;
  margin: 28px 0;
}

.callout p:last-child { margin-bottom: 0; }

/* ---------- contact block ---------- */

.contact {
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 15px;
}

.contact a { color: var(--plate); }

/* ---------- language switching ---------- */

[data-lang] { display: none; }
body[data-active="en"] [data-lang="en"] { display: block; }
body[data-active="ar"] [data-lang="ar"] { display: block; }

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  body { font-size: 16px; }
  main { padding: 40px 20px 72px; }
  h1 { font-size: 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}