:root{--bg:#fff;--fg:#1b2333;--muted:#5b6578;--brand:#1e3a8a;--brand-2:#15803d;--line:#e4e8f0;--soft:#f5f7fb;--warn-bg:#fff7ed;--warn-fg:#9a3412}
@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--fg:#e8ecf5;--muted:#9aa5bb;--brand:#8ab0ff;--brand-2:#4ade80;--line:#243049;--soft:#161d2e;--warn-bg:#2a1a10;--warn-fg:#fdba74}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.8 system-ui,-apple-system,"Segoe UI",Tahoma,"Noto Naskh Arabic",sans-serif}
a{color:var(--brand)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:1.3rem;color:var(--brand);text-decoration:none}
nav a{margin-inline-start:18px;text-decoration:none;color:var(--muted);font-size:.95rem}
nav a:hover{color:var(--fg)}
.hero{padding:72px 0 56px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.25;margin:0 0 16px}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:640px;margin:0 0 28px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
@media (prefers-color-scheme:dark){.btn{color:#0f1420}}
.btn.alt{background:transparent;color:var(--brand);border:1px solid var(--line);margin-inline-start:10px}
.badge{display:inline-block;background:var(--warn-bg);color:var(--warn-fg);border-radius:999px;padding:4px 14px;font-size:.85rem;margin-bottom:18px}
section{padding:52px 0;border-top:1px solid var(--line)}
section h2{font-size:1.7rem;margin:0 0 8px}
section p.sub{color:var(--muted);margin:0 0 28px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:20px}
.card h3{margin:0 0 6px;font-size:1.1rem}.card p{margin:0;color:var(--muted);font-size:.95rem}
table{width:100%;border-collapse:collapse;font-size:.95rem}th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:start}
th{color:var(--muted);font-weight:600}
.note{background:var(--warn-bg);color:var(--warn-fg);border-radius:12px;padding:14px 18px;font-size:.95rem}
details{border-bottom:1px solid var(--line);padding:12px 0}summary{cursor:pointer;font-weight:600}
details p{color:var(--muted);margin:8px 0 0}
footer{padding:36px 0;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}
.ph{background:#fde68a;color:#000;padding:0 6px;border-radius:4px;font-family:monospace}
.prose{max-width:760px;margin:40px auto}.prose h1{font-size:2rem}.prose h2{margin-top:32px;font-size:1.3rem}
@media (max-width:640px){nav{display:none}.btn.alt{margin:10px 0 0}}