*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--c-bg:#fff;--c-off:#f1f5f9;--c-text:#1e293b;--c-mute:#64748b;--c-line:#e2e8f0;--c-blue:#4f46e5;--c-dark:#1e1e2e;--w-side:245px;--h-nav:50px}
[data-theme=dark]{--c-bg:#0f172a;--c-off:#1e293b;--c-text:#e2e8f0;--c-mute:#94a3b8;--c-line:#334155;--c-dark:#111827}
html{scroll-behavior:smooth;scroll-padding-block-start:calc(var(--h-nav) + 12px)}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15px;line-height:1.7;color:var(--c-text);background:var(--c-bg)}
html[lang=ar] body{font-family:"Noto Sans Arabic","Noto Naskh Arabic","Segoe UI",Tahoma,"Geeza Pro",sans-serif;font-size:16px;line-height:1.85}
a{color:var(--c-blue);text-decoration:none}
a:hover{text-decoration:underline}
.skip-link{position:absolute;inset-block-start:-48px;inset-inline-start:12px;z-index:200;background:var(--c-blue);color:#fff;padding:.4rem .75rem;border-radius:0 0 5px 5px;font-size:13px}
.skip-link:focus{inset-block-start:0}
.nav{position:fixed;inset-block-start:0;inset-inline:0;height:var(--h-nav);background:var(--c-bg);border-bottom:1px solid var(--c-line);display:flex;align-items:center;padding:0 16px;gap:10px;z-index:100}
.logo{font-weight:700;font-size:14px;color:var(--c-text);white-space:nowrap}
.portal-link{font-size:12px;font-weight:600;color:var(--c-mute);border:1px solid var(--c-line);border-radius:999px;padding:3px 9px;white-space:nowrap}
.portal-link:hover{color:var(--c-blue);border-color:var(--c-blue);text-decoration:none}
.nav-links{display:flex;gap:8px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{font-size:13px;color:var(--c-mute);white-space:nowrap;padding:2px 0;border-bottom:2px solid transparent}
.nav-links a:hover{color:var(--c-blue);border-color:var(--c-blue);text-decoration:none}
.lang-switch{font-size:12px;font-weight:600;color:var(--c-mute);border:1px solid var(--c-line);border-radius:5px;padding:3px 8px;white-space:nowrap}
.lang-switch:hover{color:var(--c-blue);border-color:var(--c-blue);text-decoration:none}
.theme-btn,.menu-btn{background:none;border:1px solid var(--c-line);border-radius:5px;padding:4px 8px;cursor:pointer;color:var(--c-mute);font-size:16px;line-height:1.2}
.theme-btn:hover,.menu-btn:hover{color:var(--c-blue);border-color:var(--c-blue)}
.layout{display:flex;margin-top:var(--h-nav);min-height:calc(100vh - var(--h-nav))}
.sidebar{width:var(--w-side);flex-shrink:0;border-inline-end:1px solid var(--c-line);padding:10px;overflow-y:auto;position:sticky;top:var(--h-nav);height:calc(100vh - var(--h-nav));background:var(--c-off);font-size:13px}
.search-input{width:100%;padding:6px 8px;border:1px solid var(--c-line);border-radius:4px;font-size:13px;background:var(--c-bg);color:var(--c-text);outline:none;margin-bottom:8px}
.search-input:focus{border-color:var(--c-blue)}
.tree{display:flex;flex-direction:column;gap:1px}
.tree a{display:block;padding:3px 6px;border-radius:3px;color:var(--c-text);text-decoration:none;line-height:1.5}
.tree a:hover{background:var(--c-line);text-decoration:none}
.tree .active>a{background:var(--c-blue);color:#fff;font-weight:500}
.tree .sec{padding:8px 6px 2px;font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--c-mute)}
html[lang=ar] .tree .sec{text-transform:none;letter-spacing:0;font-size:12.5px}
html[lang=ar] .tree a{line-height:1.8}
.main{flex:1;padding:24px 32px 40px;min-width:0;max-width:860px;margin-inline:auto}
.main h1{font-size:1.7rem;font-weight:700;margin-bottom:1rem;line-height:1.4}
.main h2{font-size:1.3rem;font-weight:600;margin-top:1.8rem;margin-bottom:.6rem;padding-bottom:.3rem;border-bottom:1px solid var(--c-line);line-height:1.5}
.main h3{font-size:1.05rem;font-weight:600;margin-top:1.4rem;margin-bottom:.4rem;line-height:1.5}
.main p{margin-bottom:.75rem}
.main ul,.main ol{margin-bottom:.75rem;padding-inline-start:1.4rem}
.main li{margin-bottom:.15rem}
.main blockquote{border-inline-start:3px solid var(--c-blue);padding-inline-start:.8rem;margin:.75rem 0;color:var(--c-mute);font-style:italic}
.main hr{border:none;border-top:1px solid var(--c-line);margin:1.5rem 0}
.main img{max-width:100%;border-radius:6px}
pre{margin:.6rem 0;border-radius:5px;overflow-x:auto;font-size:13px;line-height:1.45;direction:ltr;text-align:left;unicode-bidi:isolate}
pre code{background:var(--c-dark);color:#e2e8f0;display:block;padding:10px;font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;direction:ltr;text-align:left}
code{background:var(--c-off);padding:2px 5px;border-radius:3px;font-size:.85em;font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;direction:ltr;unicode-bidi:isolate}
table{width:100%;border-collapse:collapse;margin:.6rem 0;overflow-x:auto;display:block;font-size:13px}
th,td{padding:5px 8px;border:1px solid var(--c-line);text-align:start;vertical-align:top}
th{background:var(--c-off);font-weight:600}
.admonition{padding:.6rem .8rem;margin:.6rem 0;border-radius:5px;border-inline-start:4px solid var(--c-blue);background:var(--c-off);font-size:13px}
.page-nav{display:flex;justify-content:space-between;gap:10px;margin-top:2rem;padding-top:1rem;border-top:1px solid var(--c-line)}
.page-nav a{padding:5px 10px;border:1px solid var(--c-line);border-radius:4px;font-size:13px;color:var(--c-text);max-width:48%}
.page-nav a:hover{border-color:var(--c-blue);color:var(--c-blue);text-decoration:none}
.page-nav .next{text-align:end;margin-inline-start:auto}
.page-nav .arrow{display:inline-block}
.footer{margin-top:2rem;padding:16px;border-top:1px solid var(--c-line);text-align:center;font-size:12px;color:var(--c-mute)}

/* Tutorials portal */
.portal-main{max-width:1120px;margin:0 auto;padding:calc(var(--h-nav) + 40px) 28px 40px}
body.portal{min-height:100vh;display:flex;flex-direction:column}
body.portal .portal-main{flex:1 0 auto}
body.portal .footer{margin-top:0}
.hero{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(280px,.8fr);gap:44px;align-items:center;padding-block-end:32px;border-bottom:1px solid var(--c-line);margin-bottom:30px}
.hero-copy{min-width:0}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--c-blue);margin-bottom:8px}
html[lang=ar] .eyebrow{letter-spacing:0;text-transform:none;font-size:13px}
.hero h1{font-size:2.25rem;line-height:1.25;margin-bottom:12px;letter-spacing:-.01em;text-wrap:balance}
html[lang=ar] .hero h1{font-size:2.3rem;line-height:1.4;letter-spacing:0}
.lead{font-size:1.03rem;color:var(--c-mute);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.btn{display:inline-block;font-size:13px;font-weight:600;padding:9px 16px;border-radius:8px;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--c-blue);color:#fff}
.btn-primary:hover{background:#4338ca;color:#fff}
.btn-ghost{border-color:var(--c-line);color:var(--c-text);background:var(--c-bg)}
.btn-ghost:hover{border-color:var(--c-blue);color:var(--c-blue)}
.hero-panel{background:var(--c-off);border:1px solid var(--c-line);border-radius:16px;padding:18px 20px}
.panel-title{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--c-mute);margin-bottom:4px}
html[lang=ar] .panel-title{letter-spacing:0;text-transform:none;font-size:12.5px}
.stats{display:flex;flex-direction:column}
.stat{display:flex;align-items:baseline;justify-content:flex-start;gap:12px;padding:10px 0;border-bottom:1px solid var(--c-line)}
.stat:last-child{border-bottom:none}
.stat strong{font-size:1.45rem;font-weight:700;color:var(--c-text);line-height:1.15;direction:ltr;unicode-bidi:isolate}
.stat span{font-size:13px;color:var(--c-mute)}
.tutorials h2{font-size:1.05rem;font-weight:600;margin-bottom:14px}
.portal-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,1fr);gap:20px;align-items:stretch}
.cards{display:grid;gap:18px;grid-template-columns:1fr}
.card{border:1px solid var(--c-line);border-radius:14px;background:var(--c-bg);overflow:hidden;display:grid;grid-template-columns:150px minmax(0,1fr);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--c-blue);transform:translateY(-2px)}
.card-visual{background:linear-gradient(150deg,#4f46e5,#7c3aed);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:18px;text-align:center}
.card-glyph{font-size:2.2rem;font-weight:800;letter-spacing:-.02em;line-height:1;direction:ltr}
.card-glyph-sub{font-size:11px;opacity:.82;letter-spacing:.1em;text-transform:uppercase;direction:ltr}
.card-body{padding:18px 20px;display:flex;flex-direction:column;gap:9px;min-width:0}
.card h3{font-size:1.08rem;line-height:1.5;margin:0;text-wrap:balance}
.card h3 a{color:var(--c-text)}
.card h3 a:hover{color:var(--c-blue)}
.card p{font-size:13.5px;color:var(--c-mute);margin:0}
.card .card-meta{font-size:12px;color:var(--c-mute)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.tags span{font-size:11px;background:var(--c-off);color:var(--c-mute);border:1px solid var(--c-line);border-radius:999px;padding:2px 8px;direction:ltr}
.card-cta{font-size:13px;font-weight:600;margin-top:4px}
.card-cta .arrow{display:inline-block}
.portal-note{margin:0;padding:20px 22px;border-radius:14px;background:var(--c-off);border:1px solid var(--c-line)}
.portal-note h2{font-size:1rem;margin-bottom:8px}
.portal-note p{font-size:13.5px;color:var(--c-mute)}
@media(max-width:900px){
  .hero{grid-template-columns:1fr;gap:24px;padding-block-end:26px;margin-bottom:24px}
  .hero-panel{padding:16px 18px}
  .stats{flex-direction:row;flex-wrap:wrap;gap:16px}
  .stat{flex:1;min-width:90px;border-bottom:none;padding:0;display:flex;flex-direction:column;align-items:flex-start;gap:1px}
  .portal-grid{grid-template-columns:1fr}
}
@media(max-width:800px){
  .portal-main{padding:calc(var(--h-nav) + 24px) 18px 28px}
  .hero h1,html[lang=ar] .hero h1{font-size:1.75rem}
  .lead{font-size:.98rem}
  .card{grid-template-columns:1fr}
  .card-visual{flex-direction:row;gap:8px;padding:10px 16px;justify-content:flex-start}
  .card-glyph{font-size:1.25rem}
  .card-glyph-sub{font-size:10px}
  .card-body{padding:16px}
}
@media(max-width:800px){
  .sidebar{position:fixed;inset-inline-start:-270px;z-index:99;transition:inset-inline-start .2s;box-shadow:0 0 8px rgba(0,0,0,.15)}
  .sidebar.open{inset-inline-start:0}
  .main{padding:16px 16px 32px}
  .main h1{font-size:1.45rem}
  .main h2{font-size:1.2rem}
  .nav-links{display:none}
}
@media(max-width:800px){.menu-btn{display:block!important}}
@media(min-width:801px){.menu-btn{display:none!important}}
@media print{.sidebar,.nav,.page-nav,.footer,.skip-link{display:none!important}.main{padding:0;margin-top:0;max-width:none}@page{margin:.5in}}