:root {
  color-scheme: light dark;
  --bg: #f6f7f4;
  --surface: #ffffff;
  --text: #1b211c;
  --muted: #5c665f;
  --border: #dce2dc;
  --accent: #285b3f;
  --accent-soft: #e7f0ea;
  --danger-soft: #f8eeee;
  --shadow: 0 10px 30px rgba(27, 33, 28, .08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a { color: var(--accent); }

.container {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header { padding: 28px 0 10px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: white;
  font-weight: 900;
}

.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 24px;
  padding: clamp(24px, 5vw, 48px);
  margin: 16px 0 24px;
}

h1, h2, h3 { line-height: 1.3; }
h1 { margin-top: 0; font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { margin-top: 2rem; font-size: 1.45rem; }
h3 { margin-top: 1.4rem; font-size: 1.12rem; }

p, li { max-width: 78ch; }
.meta, .muted { color: var(--muted); }

.lang-nav, .quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.button, .lang-nav a, .quick-links a {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 14px;
  background: var(--surface);
  color: var(--text);
  font-weight: 650;
}

.button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.notice {
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  margin: 18px 0;
}

.notice.danger { background: var(--danger-soft); }

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: clamp(20px, 4vw, 34px);
  margin: 0 0 22px;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
footer { padding: 12px 0 40px; color: var(--muted); font-size: .95rem; }
[dir="ltr"] { text-align: left; }
[dir="rtl"] { text-align: right; }

/* Legal-page navigation: neutral by default, app identity only for the active language. */
.lang-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 7px 14px;
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  font-weight: 700;
  transition:
    background-color .18s ease,
    border-color .18s ease,
    color .18s ease,
    box-shadow .18s ease;
}

.lang-nav a:hover {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--accent);
}

.lang-nav a:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

/* Arabic is the default active language on page load. */
.hero .lang-nav a[href="#ar"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* When English is selected, switch the active state in the top language navigation. */
main:has(#en:target) .hero .lang-nav a[href="#ar"] {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

main:has(#en:target) .hero .lang-nav a[href="#en"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Explicitly returning to Arabic restores the Arabic active state. */
main:has(#ar:target) .hero .lang-nav a[href="#ar"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

main:has(#ar:target) .hero .lang-nav a[href="#en"] {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101512;
    --surface: #171e19;
    --text: #eef3ef;
    --muted: #abb7ae;
    --border: #334139;
    --accent: #8fd0a8;
    --accent-soft: #1d3025;
    --danger-soft: #321f1f;
    --shadow: none;
  }

  .button.primary,
  .hero .lang-nav a[href="#ar"],
  main:has(#en:target) .hero .lang-nav a[href="#en"],
  main:has(#ar:target) .hero .lang-nav a[href="#ar"] {
    color: #102016;
  }
}