:root{
  --sand:#f7f8fa; --sand-2:#eef1f0; --paper:#fff;
  --ink:#0d1117; --ink-2:#44505a; --ink-3:#7c8891;
  --teal:#16a34a; --teal-2:#22c55e; --teal-soft:#e6f9ee;
  --gold:#e9b949; --red:#e5484d;
  --line:#e7eaec; --line-2:#d7dcdf;
  --r-lg:22px; --r-md:16px; --r-sm:12px;
  --shadow:0 1px 2px rgba(15,42,51,.06), 0 18px 40px -22px rgba(15,42,51,.30);
  --maxw:900px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--sand);color:var(--ink);
  font-family:'Vazirmatn',system-ui,sans-serif;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--teal);color:#fff}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

header.nav{position:sticky;top:0;z-index:60;background:rgba(247,248,250,.9);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;
  max-width:1140px;margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px}
.brand .mark{width:36px;height:36px;border-radius:11px;background:var(--ink);display:grid;place-items:center;flex:none}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{font-size:15px;font-weight:600;color:var(--ink-2)}
.nav-links a:hover{color:var(--teal)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;
  font-weight:700;font-size:15px;cursor:pointer;border:none;border-radius:13px;padding:11px 20px;
  transition:background .2s,transform .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:#128038}
.btn-lg{padding:15px 30px;font-size:16px;border-radius:15px}

.crumb{background:var(--sand-2);border-bottom:1px solid var(--line);font-size:13.5px;color:var(--ink-3)}
.crumb .wrap{padding-top:10px;padding-bottom:10px}
.crumb a{color:var(--ink-2);font-weight:600}
.crumb a:hover{color:var(--teal)}
.crumb .sep{margin:0 8px;color:var(--ink-3)}

.page{padding:34px 0 10px}
.page-head{margin-bottom:26px}
.page-ico{font-size:38px;display:block;line-height:1;margin-bottom:12px}
.page h1{font-size:clamp(26px,4.4vw,38px);line-height:1.35;margin:0 0 14px;letter-spacing:-.3px}
.lead{color:var(--ink-2);font-size:16.5px}
.lead p{margin:0 0 10px}
.hub-head{text-align:center;max-width:640px;margin-inline:auto}

.calc-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px;margin:0 0 30px}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:15px}
.field{display:flex;flex-direction:column;gap:6px}
.flabel{font-size:13.5px;font-weight:700;color:var(--ink-2)}
.fhint{font-size:12px;color:var(--ink-3);line-height:1.6}
.finput{position:relative;display:block}
.field input,.field select{width:100%;font-family:inherit;font-size:16px;font-weight:600;color:var(--ink);
  background:var(--sand);border:1.5px solid var(--line-2);border-radius:var(--r-sm);padding:11px 13px;
  outline:none;transition:border-color .15s,background .15s}
.field input{padding-left:62px;direction:ltr;text-align:left}
.field input:focus,.field select:focus{border-color:var(--teal);background:#fff}
.fsuffix{position:absolute;left:12px;top:50%;transform:translateY(-50%);
  font-size:12.5px;color:var(--ink-3);pointer-events:none;font-weight:600}

.calc-out{margin-top:20px;padding-top:18px;border-top:1.5px dashed var(--line-2)}
.out-primary{display:flex;flex-direction:column;gap:2px;background:var(--teal-soft);
  border-radius:var(--r-md);padding:16px 18px;margin-bottom:14px}
.out-label{font-size:13.5px;font-weight:700;color:#0f7a38}
.out-value{font-size:clamp(22px,4vw,30px);font-weight:900;color:#0b5f2c;letter-spacing:-.4px}
.out-rows{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:2px 18px;margin:0}
.out-rows>div{display:flex;justify-content:space-between;gap:12px;align-items:baseline;
  padding:9px 2px;border-bottom:1px solid var(--line)}
.out-rows dt{font-size:14px;color:var(--ink-2);margin:0}
.out-rows dd{margin:0;font-size:15px;font-weight:700}
.out-note{margin:12px 0 0;font-size:13px;color:var(--ink-3)}

.block{margin:0 0 30px}
.block h2{font-size:clamp(20px,3vw,25px);margin:0 0 12px;letter-spacing:-.2px}
.block p{margin:0 0 12px;color:var(--ink-2)}
.block ul,.block ol{margin:0 0 12px;padding-inline-start:22px;color:var(--ink-2)}
.block li{margin-bottom:7px}
.block a{color:var(--teal);font-weight:600}
.block a:hover{text-decoration:underline}
.muted{color:var(--ink-3)}
.small{font-size:13px}
pre{background:var(--ink);color:#e6edf3;padding:15px 17px;border-radius:var(--r-md);
  overflow-x:auto;font-size:13.5px;line-height:2;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
code{background:var(--sand-2);padding:2px 6px;border-radius:6px;font-size:.92em}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--paper)}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
th,td{padding:11px 14px;text-align:right;border-bottom:1px solid var(--line)}
thead th{background:var(--sand-2);font-size:13px;font-weight:800;color:var(--ink-2);white-space:nowrap}
tbody th{font-weight:700}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fbfcfd}

.faq details{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:9px;overflow:hidden}
.faq summary{cursor:pointer;padding:14px 17px;font-weight:700;font-size:15.5px;list-style:none;
  display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--teal);font-weight:400;flex:none}
.faq details[open] summary::after{content:"−"}
.faq-a{padding:0 17px 15px;color:var(--ink-2);font-size:15px}
.faq-a p{margin:0}

.rel-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:11px}
.rel{display:flex;gap:12px;align-items:center;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r-md);padding:13px 15px;transition:border-color .18s,transform .18s}
.rel:hover{border-color:var(--teal);transform:translateY(-2px)}
.rel-ico{font-size:22px;flex:none}
.rel strong{display:block;font-size:15px}
.rel small{display:block;color:var(--ink-3);font-size:12.5px;line-height:1.6}
.more{font-weight:700}

.hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:13px;margin-bottom:38px}
.hub-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;transition:border-color .18s,transform .18s,box-shadow .18s}
.hub-card:hover{border-color:var(--teal);transform:translateY(-3px);box-shadow:var(--shadow)}
.hub-ico{font-size:30px;display:block;margin-bottom:10px;line-height:1}
.hub-card strong{display:block;font-size:16.5px;margin-bottom:4px}
.hub-card small{color:var(--ink-3);font-size:13px;line-height:1.7}

.cta-block{background:var(--ink);color:#fff;margin-top:20px}
.cta-in{max-width:var(--maxw);margin:0 auto;padding:44px 20px;text-align:center}
.cta-in h2{font-size:clamp(21px,3.4vw,28px);margin:0 0 10px}
.cta-in p{color:rgba(255,255,255,.72);margin:0 auto 20px;max-width:520px}

footer{background:var(--sand-2);border-top:1px solid var(--line);padding:26px 0;font-size:14px;color:var(--ink-3)}
.foot-in{display:flex;flex-direction:column;gap:9px;align-items:center;text-align:center;
  max-width:1140px;margin:0 auto;padding:0 20px}
.foot-brand{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--ink);font-size:16px}
.foot-brand .mark{width:28px;height:28px;border-radius:9px;background:var(--ink);display:grid;place-items:center}
footer a{color:var(--teal);font-weight:700}

@media (max-width:760px){
  .nav-links{display:none}
  .page{padding:24px 0 6px}
  .calc-card{padding:17px;border-radius:var(--r-md)}
  .out-rows{grid-template-columns:1fr}
}

/* ---------- ویجت تبدیل ---------- */
.conv-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:20px;margin:0 0 30px}
.conv-form{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:stretch}

.conv-box{display:flex;flex-direction:column;justify-content:center;gap:3px;min-width:0;
  background:var(--sand);border:1.5px solid var(--line-2);border-radius:var(--r-md);
  padding:14px 16px;transition:border-color .18s,background .18s;cursor:text}
.conv-box:focus-within{border-color:var(--teal);background:#fff}
.conv-box.result{background:var(--teal-soft);border-color:transparent;cursor:default}

.conv-label{font-size:12.5px;font-weight:700;color:var(--ink-3);letter-spacing:.1px}
.conv-box.result .conv-label{color:#0f7a38;opacity:.8}

.conv-box input,.conv-value{display:block;width:100%;min-width:0;border:0;outline:0;background:transparent;
  font-family:inherit;font-size:clamp(21px,4vw,28px);font-weight:900;letter-spacing:-.6px;
  color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.45;padding:0;
  direction:ltr;text-align:right}
.conv-box input::placeholder{color:var(--ink-3);font-weight:700}
.conv-value{color:#0b5f2c;word-break:break-all}

.conv-unit{font-size:12px;font-weight:600;color:var(--ink-3)}
.conv-box.result .conv-unit{color:#0f7a38;opacity:.75}

.conv-swap{align-self:center;display:grid;place-items:center;width:40px;height:40px;flex:none;
  border-radius:50%;background:var(--paper);border:1.5px solid var(--line-2);color:var(--ink-2);
  transition:border-color .18s,color .18s,transform .18s}
a.conv-swap:hover{border-color:var(--teal);color:var(--teal);transform:rotate(180deg)}
.conv-swap.static{font-size:17px;font-weight:800;color:var(--ink-3);border-style:dashed}

.conv-rate{margin:14px 0 0;padding-top:13px;border-top:1px dashed var(--line-2);
  font-size:13.5px;color:var(--ink-2);text-align:center}
.conv-rate strong{color:var(--ink);font-weight:800;font-variant-numeric:tabular-nums}
.live-badge{display:inline-block;background:var(--teal-soft);color:#0f7a38;font-size:11px;
  font-weight:800;padding:2px 9px;border-radius:999px;margin-inline-start:7px;vertical-align:1px}

/* پاسخ بزرگ در زیرصفحه‌های عددی */
.answer{padding:20px}
.answer .big-answer{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:center;
  gap:8px 14px;background:var(--teal-soft);border-radius:var(--r-md);padding:22px 20px;text-align:center}
.ba-from{font-size:16.5px;font-weight:700;color:#0f7a38;opacity:.85}
.ba-eq{font-size:18px;color:#0f7a38;opacity:.5}
.ba-to{font-size:clamp(23px,5vw,34px);font-weight:900;color:#0b5f2c;
  letter-spacing:-.6px;font-variant-numeric:tabular-nums}

.tlink{color:var(--teal);font-weight:700;font-size:13px;white-space:nowrap}
.tlink:hover{text-decoration:underline}
td.num{font-weight:700;font-variant-numeric:tabular-nums}

@media (max-width:620px){
  .conv-card{padding:15px}
  .conv-form{grid-template-columns:1fr;gap:9px}
  .conv-swap{justify-self:center;transform:rotate(90deg);width:36px;height:36px}
  a.conv-swap:hover{transform:rotate(270deg)}
}