:root{
  --bg:#f6f7f9; --bg2:#ffffff; --fg:#16181d; --fg2:#5a6270;
  --line:#e3e6ea; --brand:#1f7a5a; --brand2:#26a37a; --brand-soft:#e6f4ee;
  --accent:#2b6cb0; --warn-bg:#fff6e5; --warn-line:#e8c37a; --warn-fg:#6b4a05;
  --code-bg:#eceff3; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0f1115; --bg2:#161a21; --fg:#e8eaee; --fg2:#a0a8b6;
    --line:#262c36; --brand:#3ec49a; --brand2:#2f9d7b; --brand-soft:#13251f;
    --accent:#7db4ec; --warn-bg:#2a2313; --warn-line:#5c4a1d; --warn-fg:#e8c98a;
    --code-bg:#1d222b; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.3);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:Vazirmatn,"Segoe UI",Tahoma,"Iranian Sans",system-ui,sans-serif;
  line-height:1.9;font-size:16.5px;-webkit-text-size-adjust:100%;
}
html[dir="ltr"] body{
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.75;
}
img{max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}

/* header */
header.top{
  position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.topbar{display:flex;align-items:center;gap:14px;padding:12px 0;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.logo .mark{
  width:32px;height:32px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,var(--brand2),var(--brand));
  display:grid;place-items:center;color:#fff;font-size:17px;
}
nav.topnav{margin-inline-start:auto;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
nav.topnav a{color:var(--fg2);padding:6px 11px;border-radius:8px;font-size:14.5px}
nav.topnav a:hover{background:var(--bg2);color:var(--fg);text-decoration:none}

/* language switcher */
.langs{display:flex;gap:4px;align-items:center;margin-inline-start:10px;
  padding-inline-start:10px;border-inline-start:1px solid var(--line)}
.langs a{
  font-size:13.5px;padding:5px 10px;border-radius:7px;color:var(--fg2);font-weight:600;
}
.langs a[aria-current="true"]{background:var(--brand);color:#fff}
.langs a:hover{text-decoration:none}
.langs a:not([aria-current="true"]):hover{background:var(--bg2);color:var(--fg)}

/* hero */
.hero{padding:56px 0 40px;text-align:center}
.hero h1{font-size:clamp(30px,6vw,46px);margin:0 0 12px;letter-spacing:-.5px}
.hero p.lead{font-size:clamp(16px,2.6vw,19px);color:var(--fg2);max-width:640px;margin:0 auto 26px}
.badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.badge{
  font-size:13px;padding:4px 11px;border-radius:99px;
  background:var(--brand-soft);color:var(--brand);
  border:1px solid color-mix(in srgb,var(--brand) 25%,transparent);
}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:11px;
  font-weight:700;font-size:16px;border:1px solid transparent;transition:.15s;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand2)}
.btn-ghost{background:var(--bg2);color:var(--fg);border-color:var(--line);box-shadow:var(--shadow)}

/* sections */
section{padding:44px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:none}
h2{font-size:clamp(22px,4vw,29px);margin:0 0 8px;display:flex;align-items:center;gap:11px;flex-wrap:wrap}
h2 .num{
  width:34px;height:34px;flex:none;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:800;
}
h3{font-size:19px;margin:30px 0 8px}
.sub{color:var(--fg2);margin:0 0 22px;font-size:15.5px}
p{margin:0 0 14px}

/* cards */
.card{
  background:var(--bg2);border:1px solid var(--line);border-radius:14px;
  padding:20px 22px;box-shadow:var(--shadow);margin-bottom:16px;
}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card h4{margin:0 0 6px;font-size:17px;display:flex;align-items:center;gap:8px}
.card p:last-child{margin-bottom:0}
.card .ico{font-size:20px}

/* steps */
ol.steps{list-style:none;counter-reset:s;padding:0;margin:0}
ol.steps>li{
  counter-increment:s;position:relative;margin-bottom:26px;
  padding-inline-start:52px;padding-bottom:4px;
}
ol.steps>li::before{
  content:counter(s);position:absolute;inset-inline-start:0;top:2px;
  width:34px;height:34px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  border:1px solid color-mix(in srgb,var(--brand) 30%,transparent);
  display:grid;place-items:center;font-weight:800;font-size:15px;
}
ol.steps>li>strong{display:block;font-size:17.5px;margin-bottom:4px}
ol.steps>li p{margin:0 0 8px;color:var(--fg2)}
ol.steps ul{margin:8px 0;padding-inline-start:20px;color:var(--fg2)}

/* table */
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:14px 0;
  border:1px solid var(--line);border-radius:12px;background:var(--bg2)}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:15px}
th,td{padding:11px 14px;text-align:start;border-bottom:1px solid var(--line)}
th{background:color-mix(in srgb,var(--brand) 7%,var(--bg2));font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:none}
code{background:var(--code-bg);padding:2px 7px;border-radius:6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;direction:ltr;display:inline-block}

/* callouts */
.note,.warn{border-radius:12px;padding:14px 18px;margin:16px 0;border:1px solid;font-size:15.5px}
.note{background:var(--brand-soft);border-color:color-mix(in srgb,var(--brand) 28%,transparent)}
.warn{background:var(--warn-bg);border-color:var(--warn-line);color:var(--warn-fg)}
.note p:last-child,.warn p:last-child{margin-bottom:0}
.note strong,.warn strong{font-weight:800}

/* path chip */
.path{
  display:inline-flex;align-items:center;gap:6px;background:var(--code-bg);
  border-radius:8px;padding:3px 10px;font-size:14.5px;font-weight:600;
}

/* faq */
details{background:var(--bg2);border:1px solid var(--line);border-radius:12px;
  padding:0 18px;margin-bottom:10px;box-shadow:var(--shadow)}
details[open]{padding-bottom:6px}
summary{cursor:pointer;padding:15px 0;font-weight:700;list-style:none;font-size:16.5px;
  display:flex;align-items:center;gap:10px}
summary::-webkit-details-marker{display:none}
summary::before{content:"›";color:var(--brand);font-size:22px;font-weight:800;
  transition:transform .2s;display:inline-block}
html[dir="rtl"] summary::before{transform:rotate(180deg)}
details[open] summary::before{transform:rotate(90deg)}
html[dir="rtl"] details[open] summary::before{transform:rotate(270deg)}
details p{color:var(--fg2);margin:0 0 12px}

/* footer */
footer{border-top:1px solid var(--line);padding:34px 0 44px;color:var(--fg2);font-size:15px}
.flinks{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:14px}
.disclaimer{font-size:13.5px;opacity:.85;line-height:1.8}