:root{
  --bg:#f7f8fa;--surface:#fff;--ink:#14213d;--muted:#5b6578;--line:#e3e7ee;
  --brand:#2f5bea;--brand-ink:#1d3fb3;--brand-soft:#eaf0ff;--warn-bg:#fff4cc;--warn-ink:#6b4e00;--warn-line:#f0c53a;
  --radius:14px;--max:1040px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1320;--surface:#161d2e;--ink:#eef1f8;--muted:#9aa6bf;--line:#26304a;
    --brand:#7c9bff;--brand-ink:#a9bdff;--brand-soft:#1b2542;--warn-bg:#3a2f08;--warn-ink:#ffe08a;--warn-line:#8a6d12}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.8;font-size:17px;
  font-family:"Segoe UI",Tahoma,"Noto Sans Arabic","Helvetica Neue",Arial,system-ui,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--brand-ink)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
/* language switching: Arabic default, no-JS safe */
html[lang="ar"] [data-l="en"],html[lang="en"] [data-l="ar"]{display:none!important}
html[lang="en"] body{line-height:1.7}

header.site{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none}
.brand .logo{width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:700}
nav.links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
nav.links a{padding:6px 12px;border-radius:8px;text-decoration:none;color:var(--muted);font-size:15px}
nav.links a:hover,nav.links a[aria-current="page"]{background:var(--brand-soft);color:var(--brand-ink)}
button.lang{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:8px;
  padding:6px 12px;font:inherit;font-size:14px;cursor:pointer}
button.lang:hover{border-color:var(--brand)}

.hero{padding:64px 0 40px}
.hero .tag{display:inline-block;background:var(--brand-soft);color:var(--brand-ink);border-radius:99px;
  padding:4px 14px;font-size:14px;margin-bottom:16px}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.25;margin:0 0 16px}
.hero p.lead{font-size:clamp(17px,2.2vw,20px);color:var(--muted);max-width:720px;margin:0 0 24px}
.btn{display:inline-block;padding:10px 20px;border-radius:10px;text-decoration:none;font-weight:600;
  border:1px solid var(--brand);background:var(--brand);color:#fff;margin-inline-end:8px;margin-block-end:8px}
.btn.ghost{background:transparent;color:var(--brand-ink)}
section{padding:32px 0}
section h2{font-size:26px;margin:0 0 8px}
section>.wrap>p.sub{color:var(--muted);margin:0 0 20px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:16px}
.note{background:var(--surface);border:1px solid var(--line);border-inline-start:4px solid var(--brand);
  border-radius:var(--radius);padding:18px 20px}

/* legal pages */
main.doc{padding:40px 0 56px}
main.doc .paper{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,4vw,44px);
  max-width:820px;margin:0 auto}
main.doc h1{font-size:clamp(26px,4vw,34px);margin:0 0 4px;line-height:1.3}
main.doc .meta{color:var(--muted);font-size:15px;margin:0 0 24px}
main.doc h2{font-size:21px;margin:32px 0 8px;padding-top:8px}
main.doc ul{padding-inline-start:22px}
main.doc li{margin:4px 0}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px 18px;margin-bottom:8px;font-size:15px}
.toc ol{margin:6px 0 0;padding-inline-start:20px}
mark.todo{background:var(--warn-bg);color:var(--warn-ink);border:1px dashed var(--warn-line);
  border-radius:6px;padding:0 6px;font-weight:600}
.banner-todo{background:var(--warn-bg);color:var(--warn-ink);border:1px solid var(--warn-line);
  border-radius:10px;padding:12px 16px;margin:0 0 24px;font-size:15px}

footer.site{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:15px;margin-top:24px}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between}
footer.site a{color:var(--muted)}
footer.site .limited{flex-basis:100%;font-size:14px}

@media (max-width:560px){
  header.site .wrap{flex-wrap:wrap;padding-block:8px}
  body{font-size:16px}
}
@media print{header.site,footer.site,.banner-todo{display:none}.paper{border:0}}