@font-face{font-family:"Vazirmatn";src:url(/static/fonts/Vazirmatn.woff2) format("woff2");font-weight:100 900;font-display:swap}
/* Public site stylesheet. Dark is the default; [data-theme="light"] overrides it.
   No inline styles are used anywhere (strict CSP). */
:root{
  --bg:#080d16;--bg2:#0b1220;--surface:#0f1726;--surface2:#141f33;--line:#1b2840;--line2:#2a3b5a;
  --ink:#e8eef9;--muted:#95a5c0;--faint:#64748f;
  --accent:#6d97ff;--accent-ink:#06101f;--accent-soft:rgba(109,151,255,.12);--glow:rgba(109,151,255,.20);
  --ok:#3ddc84;--warn:#f2b441;--err:#ff6b6b;
  --term-bg:#050a12;--term-ink:#d3e1ff;--term-dim:#6b7fa3;
  --t-accent:#7aa2ff;--t-ok:#3ddc84;--t-warn:#f2b441;--t-err:#ff6b6b;
  --shadow:0 24px 60px -24px rgba(0,0,0,.7);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --radius:.8rem;--wrap:72rem;color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f5f7fb;--bg2:#eef2f8;--surface:#ffffff;--surface2:#f3f6fb;--line:#dde4ef;--line2:#c8d2e4;
  --ink:#0b1423;--muted:#566782;--faint:#8493ab;
  --accent:#2f5bff;--accent-ink:#ffffff;--accent-soft:rgba(47,91,255,.08);--glow:rgba(47,91,255,.14);
  --ok:#12803f;--warn:#a86b00;--err:#c0392b;--shadow:0 24px 50px -28px rgba(15,30,60,.35);color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.95 "Vazirmatn",Tahoma,"Segoe UI",system-ui,sans-serif;-webkit-text-size-adjust:100%}
::selection{background:var(--accent);color:var(--accent-ink)}
img{max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip{position:absolute;inset-inline-start:1rem;top:-4rem;background:var(--accent);color:var(--accent-ink);padding:.5rem 1rem;border-radius:.4rem;z-index:30}
.skip:focus{top:1rem}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 1.25rem}
.muted{color:var(--muted)}
.hl{color:var(--accent)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:1.5rem;padding-block:.75rem}
.brand{display:inline-flex;align-items:center;gap:.65rem;font-weight:800;font-size:1.15rem;text-decoration:none}
.mark{display:grid;place-items:center;width:2rem;height:2rem;border-radius:.55rem;background:var(--surface2);border:1px solid var(--line2);color:var(--accent);font:700 .78rem/1 var(--mono);direction:ltr}
.mark::before{content:">_"}
.bar nav{display:flex;gap:.3rem;margin-inline-start:1rem;overflow-x:auto;white-space:nowrap}
.bar nav a{text-decoration:none;color:var(--muted);font-size:.96rem;padding:.25rem .8rem;border-radius:99px;transition:color .15s,background .15s}
.bar nav a:hover{color:var(--ink);background:var(--surface)}
.bar nav a[aria-current]{color:var(--ink);background:var(--surface2)}
.bar-end{display:flex;align-items:center;gap:.6rem;margin-inline-start:auto}
.theme-toggle{display:none;place-items:center;width:2.3rem;height:2.3rem;border-radius:50%;border:1px solid var(--line2);background:var(--surface);color:var(--ink);cursor:pointer}
.js .theme-toggle{display:inline-grid}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.i-moon{display:none}
:root[data-theme="light"] .i-sun{display:none}
:root[data-theme="light"] .i-moon{display:block}

/* ---------- buttons ---------- */
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:.7rem 1.6rem;border-radius:.65rem;font-weight:700;text-decoration:none;border:1px solid var(--accent);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px -10px var(--glow),0 0 0 4px var(--accent-soft)}
.btn-sm{padding:.4rem 1.1rem;font-size:.92rem}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line2)}
.btn-ghost:hover{border-color:var(--ink);box-shadow:none}
.btn-light{background:var(--ink);color:var(--bg);border-color:var(--ink)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:5rem 0 4.5rem;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:3.2rem 3.2rem;-webkit-mask-image:radial-gradient(ellipse 70% 90% at 25% 10%,#000 10%,transparent 75%);mask-image:radial-gradient(ellipse 70% 90% at 25% 10%,#000 10%,transparent 75%);opacity:.7}
.hero::after{content:"";position:absolute;width:42rem;height:42rem;inset-inline-start:-12rem;top:-18rem;background:radial-gradient(circle,var(--glow),transparent 65%);pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:3.5rem;align-items:center}
h1{font-size:clamp(1.9rem,4vw,2.85rem);line-height:1.55;margin:0 0 1.2rem;font-weight:800}
h2{font-size:clamp(1.55rem,3vw,2.1rem);line-height:1.5;margin:0 0 .7rem;font-weight:800}
h3{font-size:1.15rem;line-height:1.7;margin:0 0 .4rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:38rem;margin:0 0 2rem}
.actions{display:flex;gap:.75rem;flex-wrap:wrap}

/* terminal */
.term{direction:ltr;text-align:left;background:var(--term-bg);color:var(--term-ink);border:1px solid var(--line2);border-radius:1rem;box-shadow:var(--shadow);overflow:hidden;font:.84rem/1.9 var(--mono)}
.term-bar{display:flex;align-items:center;gap:.4rem;padding:.65rem 1rem;border-bottom:1px solid rgba(255,255,255,.07);color:var(--term-dim);font-size:.75rem}
.term-bar i{width:.6rem;height:.6rem;border-radius:50%;background:#2a3b5a}
.term-bar span{margin-left:.6rem}
.term-body{padding:1rem 1.25rem 1.2rem;white-space:pre;overflow-x:auto}
.ln{display:block;opacity:0;animation:ln .4s ease forwards}
.ln.cmd::before{content:"$ ";color:var(--t-accent)}
.ln.ok::before{content:"✔ ";color:var(--t-ok)}
.ln.warn::before{content:"! ";color:var(--t-warn);font-weight:700}
.ln.err::before{content:"✖ ";color:var(--t-err)}
.ln.dim{color:var(--term-dim)}
.ln.dim::before{content:"# "}
.ln:nth-child(1){animation-delay:.1s}.ln:nth-child(2){animation-delay:.4s}.ln:nth-child(3){animation-delay:.65s}
.ln:nth-child(4){animation-delay:.85s}.ln:nth-child(5){animation-delay:1.05s}.ln:nth-child(6){animation-delay:1.25s}
.ln:nth-child(7){animation-delay:1.45s}.ln:nth-child(8){animation-delay:1.7s}.ln:nth-child(n+9){animation-delay:1.9s}
.cursor{display:inline-block;width:.55em;height:1.05em;background:var(--t-accent);vertical-align:-.18em;animation:blink 1.1s steps(1) infinite}
@keyframes ln{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@keyframes blink{50%{opacity:0}}

/* stack strip */
.stack{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;padding-block:1.2rem;direction:ltr;font:.82rem var(--mono);color:var(--faint)}
.stack ul{display:flex;gap:.5rem;flex-wrap:wrap;list-style:none;margin:0;padding:0}
.stack li{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:.45rem;padding:.1rem .7rem}

/* ---------- sections ---------- */
.block{padding:5rem 0}
.block-tight{padding:1rem 1.25rem 4rem}
.alt{background:var(--bg2);border-block:1px solid var(--line)}
.sec-head{max-width:40rem;margin-bottom:2.2rem}
.sec-head p{color:var(--muted);margin:0}
.row-head{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:1.5rem}
.row-head a{color:var(--accent);text-decoration:none}

.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.bento.many .svc:first-child{grid-column:span 2;grid-row:span 2;padding:2.2rem}
.bento.many .svc:first-child h3{font-size:1.5rem}
.bento.many .svc:first-child p{font-size:1.08rem;max-width:30rem}
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.svc{position:relative;display:flex;flex-direction:column;gap:.3rem;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;overflow:hidden;transition:transform .2s,border-color .2s,box-shadow .2s}
.svc::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 100% 0,var(--glow),transparent 55%);opacity:0;transition:opacity .25s}
.svc:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:var(--shadow)}
.svc:hover::before{opacity:1}
.svc>*{position:relative}
.svc h2,.svc h3{margin:0}
.svc p{margin:0;color:var(--muted)}
.go{margin-top:auto;padding-top:1rem;align-self:flex-start}
.go::after{content:"";display:block;width:.65rem;height:.65rem;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(45deg);transition:transform .2s}
.svc:hover .go::after{transform:translateX(-5px) rotate(45deg)}

.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.6rem;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding-top:2.4rem;border-top:1px solid var(--line2)}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;top:.5rem;inset-inline-start:0;font:700 .95rem var(--mono);color:var(--accent);direction:ltr}
.steps li::after{content:"";position:absolute;top:-.33rem;inset-inline-start:0;width:.65rem;height:.65rem;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.steps b{display:block;margin-bottom:.2rem}
.steps span{color:var(--muted);font-size:.96rem}

.author-card{display:flex;gap:1.3rem;align-items:flex-start;max-width:46rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.avatar{flex:none;display:grid;place-items:center;width:3.6rem;height:3.6rem;border-radius:50%;background:var(--accent-soft);color:var(--accent);border:1px solid var(--line2);font-weight:800;font-size:1.4rem}
.author-card h3{margin:0}.author-card p{margin:.3rem 0 0;color:var(--muted)}

/* ---------- cards ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,border-color .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);border-color:var(--line2);box-shadow:var(--shadow)}
.card-img{display:block;aspect-ratio:16/9;background:var(--surface2);overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:1.1rem 1.25rem 1.3rem;display:flex;flex-direction:column;gap:.35rem;flex:1}
.card h3{margin:.2rem 0 0}
.card h3 a{text-decoration:none}.card h3 a:hover{color:var(--accent)}
.card p{margin:0;color:var(--muted);font-size:.95rem;line-height:1.85}
.card time{margin-top:auto;padding-top:.6rem;color:var(--faint);font-size:.85rem}
.chip{display:inline-block;align-self:flex-start;font-size:.8rem;font-weight:700;color:var(--accent);text-decoration:none;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent);border-radius:99px;padding:0 .8rem}

/* ---------- list pages ---------- */
.page-head{padding-block:3rem 1.5rem}
.page-head h1{font-size:clamp(1.8rem,3.6vw,2.6rem)}
.cat-tabs{list-style:none;display:flex;gap:.5rem;flex-wrap:wrap;margin:1.6rem 0 0;padding:0}
.cat-tabs a{display:inline-block;text-decoration:none;border:1px solid var(--line);border-radius:99px;padding:.1rem 1.1rem;font-size:.93rem;background:var(--surface);color:var(--muted)}
.cat-tabs a:hover{color:var(--ink);border-color:var(--line2)}
.cat-tabs a[aria-current]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.cat-tabs small{opacity:.75}
.pager{display:flex;gap:.4rem;justify-content:center;margin-top:2.5rem;flex-wrap:wrap}
.pager a{min-width:2.5rem;text-align:center;padding:.2rem .7rem;border:1px solid var(--line);border-radius:.5rem;text-decoration:none;background:var(--surface)}
.pager a[aria-current]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.2rem .6rem;margin:0 0 1.2rem;padding:0;font-size:.88rem;color:var(--faint)}
.crumbs li+li::before{content:"/";margin-inline-end:.6rem;opacity:.5}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ink)}

/* ---------- article ---------- */
.progress{position:fixed;top:0;inset-inline:0;height:3px;background:var(--accent);transform-origin:right;transform:scaleX(0);z-index:40;display:none}
@supports (animation-timeline:scroll()){.progress{display:block;animation:grow linear both;animation-timeline:scroll(root)}}
@keyframes grow{to{transform:scaleX(1)}}
.article{padding-block:2.5rem 3rem}
.article-head,.hero-img{max-width:50rem}
.article-head h1{margin-top:.7rem;font-size:clamp(1.8rem,3.8vw,2.7rem)}
.byline{display:flex;flex-wrap:wrap;gap:.3rem 1.2rem;color:var(--faint);font-size:.9rem;margin:0 0 1.6rem}
.byline span:first-child{color:var(--muted);font-weight:600}
.hero-img{margin:0 0 2.2rem}.hero-img img{width:100%;border-radius:var(--radius);display:block;border:1px solid var(--line)}
.article-grid{display:grid;grid-template-columns:minmax(0,46rem);gap:3.5rem;align-items:start}
.article-grid.has-toc{grid-template-columns:minmax(0,46rem) 16rem}
.article-side{position:sticky;top:5.5rem}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:.8rem 1.2rem}
.toc summary{cursor:pointer;font-weight:700;font-size:.95rem}
.toc ol{margin:.6rem 0 0;padding:0;list-style:none}
.toc li{padding:.15rem 0;font-size:.9rem;line-height:1.7}.toc li.l3{padding-inline-start:1rem;font-size:.86rem}
.toc a{text-decoration:none;color:var(--muted)}.toc a:hover{color:var(--accent)}
.prose{font-size:1.08rem}
.prose h2{margin:2.8rem 0 .8rem;font-size:1.65rem;padding-top:.5rem}
.prose h3{margin:2.2rem 0 .5rem;font-size:1.25rem}
.prose p,.prose ul,.prose ol{margin:0 0 1.25rem}
.prose a{color:var(--accent);text-underline-offset:.25em}
.prose img{display:block;margin:1.8rem auto;border-radius:var(--radius);border:1px solid var(--line)}
.prose code{direction:ltr;unicode-bidi:isolate;font:.86em var(--mono);background:var(--surface2);border:1px solid var(--line);border-radius:.35rem;padding:.05rem .4rem}
.prose pre{position:relative;direction:ltr;text-align:left;background:var(--term-bg);color:var(--term-ink);border:1px solid var(--line2);border-radius:var(--radius);padding:2.4rem 1.2rem 1.1rem;overflow-x:auto;line-height:1.75;margin:0 0 1.5rem}
.prose pre[data-lang]::before{content:attr(data-lang);position:absolute;top:.55rem;inset-inline-end:1rem;font:.72rem var(--mono);color:var(--term-dim)}
.prose pre code{background:none;border:0;padding:0;color:inherit;font-size:.88rem}
.copy{position:absolute;top:.4rem;inset-inline-start:.7rem;font:.72rem var(--mono);color:var(--term-dim);background:transparent;border:1px solid rgba(255,255,255,.12);border-radius:.35rem;padding:0 .6rem;cursor:pointer}
.copy:hover{color:var(--term-ink);border-color:var(--accent)}
.prose blockquote{margin:1.6rem 0;padding:.4rem 1.3rem;border-inline-start:3px solid var(--accent);background:var(--accent-soft);border-radius:0 var(--radius) var(--radius) 0}
.prose blockquote p{margin:.4rem 0}
.prose table{border-collapse:collapse;display:block;overflow-x:auto;margin-bottom:1.5rem}
.prose th,.prose td{border:1px solid var(--line);padding:.5rem .9rem}
.prose th{background:var(--surface2)}
.faq{margin-top:3.2rem}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:.7rem;margin-bottom:.6rem;padding:.2rem 1.2rem}
.faq details[open]{border-color:var(--line2)}
.faq summary{cursor:pointer;font-weight:700;padding:.7rem 0;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 1.4rem/1.3 var(--mono);color:var(--accent)}
.faq details[open] summary::after{content:"−"}
.faq-a{color:var(--muted);padding-bottom:.7rem}.faq-a p{margin:.3rem 0}
.author-box{margin-top:3rem;padding:1.3rem 1.5rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.author-box p{margin:.4rem 0 0;color:var(--muted)}
.author-box span{margin-inline-start:.8rem}

/* ---------- call to action ---------- */
.cta{padding:1rem 0 5rem}
.cta-panel{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line2);border-radius:1.2rem;padding:3.2rem 3rem;display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap}
.cta-panel::before{content:"";position:absolute;width:30rem;height:30rem;inset-inline-end:-8rem;top:-14rem;background:radial-gradient(circle,var(--glow),transparent 65%)}
.cta-panel>*{position:relative}
.prompt{display:block;direction:ltr;text-align:left;font:.85rem var(--mono);color:var(--accent);margin-bottom:.6rem}
.prompt::before{content:"$ "}
.cta-panel h2{margin:0 0 .3rem}.cta-panel p{margin:0;color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding-top:3.2rem;font-size:.95rem;background:var(--bg2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem}
.foot-grid h2{font-size:.95rem;margin:0 0 .7rem;color:var(--ink)}
.foot-grid ul{list-style:none;margin:0;padding:0}.foot-grid li{padding:.15rem 0}
.foot-grid a{text-decoration:none;color:var(--muted)}.foot-grid a:hover{color:var(--accent)}
.foot-grid p{color:var(--muted);margin:.6rem 0 0}
.legal{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-block:2.2rem 2.5rem;color:var(--faint);font-size:.85rem}
.legal .mono{direction:ltr;font-family:var(--mono);display:flex;gap:1rem}
.legal a{text-decoration:none}.legal a:hover{color:var(--accent)}

@media (max-width:60rem){
  .hero-grid{grid-template-columns:1fr;gap:2.5rem}
  .hero{padding:3rem 0}
  .grid{grid-template-columns:1fr 1fr}
  .bento,.bento.many{grid-template-columns:1fr 1fr}
  .bento.many .svc:first-child{grid-column:span 2;grid-row:auto}
  .steps{grid-template-columns:1fr 1fr;gap:2.4rem 1.6rem}
  .article-grid.has-toc{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;order:-1}
  .foot-grid{grid-template-columns:1fr 1fr}
  .bar{flex-wrap:wrap;gap:.4rem 1rem}
  .bar nav{order:3;width:100%;margin:0}
}
@media (max-width:38rem){
  .grid,.steps,.foot-grid,.svc-grid,.bento,.bento.many{grid-template-columns:1fr}
  .bento.many .svc:first-child{grid-column:auto}
  .block{padding:3.2rem 0}.cta-panel{padding:2rem 1.5rem}.bar-cta{display:none}
  .term{font-size:.76rem}.author-card{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}*{transition:none!important}
  .ln{opacity:1;animation:none}.cursor{animation:none}.progress{display:none!important}
}
@media print{.site-header,.cta,.site-footer,.skip,.progress,.copy{display:none}body{background:#fff;color:#000}}