/* Layout: navy hero band, sticky table of contents beside numbered sections, navy footer. Arabic first, English on toggle. */
:root{
 --navy:#1a2b47; --navy-2:#243a5e; --orange:#e8851a; --orange-ink:#b5610a;
 --bg:#f6f7fa; --surface:#ffffff; --fg:#1a2b47; --muted:#5a6780; --line:#dfe3ec;
 --hero-bg:#1a2b47; --hero-fg:#ffffff; --hero-muted:#b8c2d6; --tab-bg:rgba(255,255,255,.08); --tab-on:#e8851a; --tab-on-fg:#1a2b47;
 --foot-bg:#132039; --foot-fg:#c9d2e3;
 --font:'Cairo','Segoe UI',Tahoma,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
 --bg:#0d1626; --surface:#15213a; --fg:#e8edf6; --muted:#9aa8c2; --line:#26344f; --orange-ink:#f0a04b;
 --hero-bg:#101c33; --foot-bg:#0a1220; color-scheme:dark}}
:root[data-theme="dark"]{
 --bg:#0d1626; --surface:#15213a; --fg:#e8edf6; --muted:#9aa8c2; --line:#26344f; --orange-ink:#f0a04b;
 --hero-bg:#101c33; --foot-bg:#0a1220; color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);line-height:1.85;font-size:1rem;padding-inline:0}
.wrap{max-width:70rem;margin-inline:auto;padding-inline:1rem}
a{color:inherit}
:focus-visible{outline:3px solid var(--orange);outline-offset:2px;border-radius:4px}
/* language switching */
html[lang="ar"] .en{display:none!important}
html[lang="en"] .ar{display:none!important}
/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:var(--surface);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.75rem}
.logo{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;font-weight:800;font-size:1.35rem;color:var(--navy)}
:root[data-theme="dark"] .logo{color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo{color:#fff}}
.logo.on-dark{color:#fff}
.logo-dot{width:.45rem;height:.45rem;border-radius:50%;background:var(--orange)}
.logo-en{font-weight:600;font-size:1rem;opacity:.75;direction:ltr}
.bar-links{display:flex;align-items:center;gap:1rem;font-weight:600}
.bar-links a{text-decoration:none;color:var(--muted)}
.bar-links a:hover{color:var(--orange-ink)}
.lang{font:inherit;font-weight:700;font-size:.9rem;background:var(--orange);color:#1a2b47;border:0;border-radius:.5rem;padding:.3rem .9rem;cursor:pointer}
.lang:hover{filter:brightness(1.08)}
/* hero */
.hero{background:var(--hero-bg);color:var(--hero-fg);padding-block:2.5rem 0}
.eyebrow{margin:0 0 .5rem;color:var(--orange);font-weight:700;letter-spacing:.04em;font-size:.9rem}
h1{margin:0 0 .75rem;font-size:clamp(1.9rem,5vw,2.9rem);line-height:1.25;font-weight:800;text-wrap:balance}
.lead{margin:0;max-width:46rem;color:var(--hero-muted);font-size:1.05rem}
.meta{margin:1rem 0 0;color:var(--hero-muted);font-size:.9rem}
.tabs{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.75rem}
.tabs a{text-decoration:none;font-weight:700;padding:.65rem 1.1rem;border-radius:.6rem .6rem 0 0;background:var(--tab-bg);color:var(--hero-fg)}
.tabs a:hover{background:rgba(255,255,255,.16)}
.tabs a[aria-current="page"]{background:var(--bg);color:var(--fg)}
/* body */
.layout{display:grid;grid-template-columns:15rem minmax(0,1fr);gap:2.5rem;padding-block:2.5rem 4rem;align-items:start}
.toc{position:sticky;top:5rem;font-size:.92rem;line-height:1.5}
.toc-h{margin:0 0 .75rem;font-weight:700;color:var(--muted);font-size:.8rem;letter-spacing:.06em}
.toc nav>span{display:flex;flex-direction:column}
.toc a{display:flex;gap:.6rem;padding:.4rem .6rem;text-decoration:none;color:var(--muted);border-radius:.4rem}
.toc a:hover{background:var(--surface);color:var(--fg)}
.toc .num{color:var(--orange-ink);font-weight:700;font-variant-numeric:tabular-nums;min-width:1.4em}
.doc{min-width:0}
.sec{background:var(--surface);border:1px solid var(--line);border-radius:.75rem;padding:1.5rem 1.6rem;margin-bottom:1rem}
.sec h2{margin:0 0 .6rem;display:flex;align-items:baseline;gap:.7rem;font-size:1.3rem;line-height:1.4;text-wrap:balance}
.sec h2 .num{color:var(--orange-ink);font-variant-numeric:tabular-nums}
.sec p{margin:.5rem 0;max-width:46rem}
.sec ul{margin:.5rem 0;padding-inline-start:1.3rem;display:flex;flex-direction:column;gap:.35rem;max-width:46rem}
.sec li::marker{color:var(--orange)}
.contact{display:grid;gap:.1rem;margin:.5rem 0 0}
.contact div{display:grid;grid-template-columns:11rem minmax(0,1fr);gap:1rem;padding:.6rem 0;border-top:1px solid var(--line)}
.contact div:first-child{border-top:0}
.contact dt{color:var(--muted);font-weight:600}
.contact dd{margin:0;overflow-wrap:anywhere}
.contact a{color:var(--orange-ink);font-weight:600}
.sel{user-select:all}
bdi{unicode-bidi:isolate}
/* footer */
.foot{background:var(--foot-bg);color:var(--foot-fg);padding-block:2.5rem 1.5rem}
.foot-in{display:grid;grid-template-columns:minmax(0,1.6fr) 1fr 1fr;gap:2rem}
.foot-c{margin:.75rem 0 0;font-size:.9rem;line-height:1.7}
.foot-l,.foot-s{display:flex;flex-direction:column;gap:.4rem}
.foot a{text-decoration:none;color:var(--foot-fg)}
.foot a:hover{color:var(--orange)}
.copy{margin-top:1.5rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.12);font-size:.85rem;opacity:.8}
@media (max-width:52rem){
 .layout{grid-template-columns:minmax(0,1fr);gap:1.25rem}
 .toc{position:static}
 .toc nav>span{flex-direction:row;flex-wrap:wrap;gap:.25rem}
 .toc a{background:var(--surface);border:1px solid var(--line)}
 .foot-in{grid-template-columns:minmax(0,1fr)}
 .contact div{grid-template-columns:minmax(0,1fr);gap:.1rem}
 .sec{padding:1.2rem 1.1rem}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}