/* Moshtariat tools — moshtariat.ir/tools
   Palette and radius ladder follow the main site's brand tokens so a visitor
   moving between /pricing and /tools/vat reads one product. Zero external
   requests: the font ships with this repo. */

@font-face{
  font-family:"Vazirmatn";
  src:url("fonts/Vazirmatn.woff2") format("woff2");
  font-weight:100 900;font-style:normal;font-display:swap;
}

:root{
  --indigo:#4F46E5;--indigo-dark:#3730A3;--indigo-light:#6366F1;
  --lav:#EEF2FF;--lav2:#F5F7FF;
  --navy:#0F172A;--ink:#1E293B;--muted:#64748B;--faint:#94A3B8;
  --border:#DBE3EF;--surface:#F8FAFC;--white:#fff;
  --green:#16A34A;--red:#DC2626;--amber:#D97706;--mint:#ECFDF5;
  --r-xl:24px;--r-lg:16px;--r-md:13px;--r-sm:10px;--r-pill:999px;
  --shadow-card:0 1px 2px rgba(15,23,42,.04),0 8px 24px -18px rgba(15,23,42,.18);
  --ring:0 0 0 3px rgba(79,70,229,.16);
  --maxw:1140px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--surface);color:var(--ink);font-family:"Vazirmatn",Tahoma,Arial,sans-serif;font-size:15.5px;line-height:1.9;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
svg{width:18px;height:18px;flex:none}
a{color:var(--indigo);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3{margin:0;color:var(--navy);line-height:1.5;font-weight:800}
p{margin:0}
ul,ol{margin:0;padding:0}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}
.skip{position:absolute;right:-999px;top:8px;background:var(--navy);color:#fff;padding:6px 12px;border-radius:8px;z-index:50}
.skip:focus{right:8px}
.muted{color:var(--muted)}
.tiny{font-size:12.5px;color:var(--muted)}
.lat{direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}
[hidden]{display:none!important}

/* ---------- header / footer ------------------------------------------ */
.hdr{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.hdr-in{display:flex;align-items:center;gap:18px;height:62px}
.brand{display:flex;align-items:center;gap:8px;color:var(--navy);font-weight:800;font-size:18px}
.brand:hover{text-decoration:none}
.brand img{width:44px;height:auto}
.brand small{font-weight:500;color:var(--muted);font-size:13px;border-right:1px solid var(--border);padding-right:8px;margin-right:2px}
.nav{display:flex;gap:4px;margin-inline-start:8px}
.nav a{color:var(--ink);padding:6px 11px;border-radius:var(--r-pill);font-size:14.5px}
.nav a:hover{background:var(--lav2);text-decoration:none}
.nav a[aria-current]{color:var(--indigo);background:var(--lav);font-weight:700}
.hdr-act{margin-inline-start:auto;display:flex;gap:8px;align-items:center}
@media(max-width:880px){
  .nav{display:none}
  .hdr-act .btn-ghost{display:none}
  .brand small{display:none}
}
.subnav{display:none;border-top:1px solid var(--border);overflow-x:auto;white-space:nowrap;scrollbar-width:none}
.subnav a{display:inline-block;padding:9px 12px;color:var(--ink);font-size:14px}
.subnav a[aria-current]{color:var(--indigo);font-weight:700}
@media(max-width:880px){.subnav{display:block}}

.ftr{background:var(--navy);color:#CBD5E1;margin-top:64px;padding:44px 0 26px;font-size:14px}
.ftr a{color:#E2E8F0}
.ftr-grid{display:grid;gap:26px;grid-template-columns:1fr}
@media(min-width:800px){.ftr-grid{grid-template-columns:1.4fr 1fr 1fr}}
.ftr h2{color:#fff;font-size:15px;margin-bottom:10px}
.ftr ul{list-style:none}
.ftr li+li{margin-top:6px}
.ftr .brand{color:#fff;margin-bottom:10px}
.ftr-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:16px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;color:#94A3B8;font-size:13px}

/* ---------- buttons --------------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid transparent;border-radius:var(--r-md);padding:9px 16px;font-weight:700;font-size:14.5px;cursor:pointer;line-height:1.4;background:none;white-space:nowrap;transition:background .15s,border-color .15s,color .15s}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--indigo);color:#fff}
.btn-primary:hover{background:var(--indigo-dark)}
.btn-ghost{border-color:var(--border);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.btn-soft{background:var(--lav);color:var(--indigo)}
.btn-soft:hover{background:#E0E7FF}
.btn-sm{padding:6px 12px;font-size:13.5px;border-radius:var(--r-sm)}
.btn-lg{padding:12px 22px;font-size:16px}
.btn-icon{padding:6px;border-radius:var(--r-sm);color:var(--muted)}
.btn-icon:hover{color:var(--red);background:#FEF2F2}
.btn-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- page head ------------------------------------------------- */
.crumbs{font-size:13px;color:var(--muted);padding:16px 0 0}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{margin:0 6px;color:var(--faint)}
.page-head{padding:14px 0 22px}
.page-head h1{font-size:26px}
@media(min-width:800px){.page-head h1{font-size:32px}}
.page-head .lede{color:var(--muted);margin-top:6px;max-width:720px;font-size:16px}

/* ---------- tool layout ----------------------------------------------- */
.tool{display:grid;gap:18px;align-items:start}
.tool>*{min-width:0}
@media(min-width:960px){.tool{grid-template-columns:1.1fr .9fr}.tool-result{position:sticky;top:80px}}
.tool.tool-wide{grid-template-columns:1fr}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);padding:20px}
@media(min-width:800px){.card{padding:24px}}
.card h2{font-size:17px;margin-bottom:12px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.card-head h2{margin:0}

/* segmented control */
.seg{display:flex;flex-wrap:wrap;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:4px;gap:4px;margin-bottom:16px}
.seg button{flex:1 1 auto;border:0;background:none;border-radius:9px;padding:7px 10px;font-size:14px;cursor:pointer;color:var(--muted);font-weight:600}
.seg button[aria-pressed="true"]{background:#fff;color:var(--indigo);box-shadow:0 1px 3px rgba(15,23,42,.12)}
.seg-sm{display:inline-flex;margin:0;padding:3px}
.seg-sm button{padding:3px 10px;font-size:12.5px;flex:none}

/* fields */
.fields{display:grid;gap:14px}
.fields>*{min-width:0}
.fields.two{grid-template-columns:1fr}
@media(min-width:560px){.fields.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.field{min-width:0}
.field label{display:block;font-size:14px;font-weight:700;color:var(--navy);margin-bottom:5px}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:4px;min-height:1.2em}
.field .words{font-size:12.5px;color:var(--indigo);margin-top:4px;min-height:1.2em}
.inp{display:flex;align-items:stretch;border:1px solid var(--border);border-radius:var(--r-md);background:#fff;transition:border-color .15s,box-shadow .15s;overflow:hidden}
.inp:focus-within{border-color:var(--indigo);box-shadow:var(--ring)}
.inp input,.inp select,.inp textarea{flex:1;min-width:0;border:0;outline:0;background:none;padding:10px 12px;font-size:16px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.inp input.num,.inp input.date,.inp input.ltr{direction:ltr;text-align:left;font-variant-numeric:tabular-nums;letter-spacing:.2px}
.inp .unit{display:flex;align-items:center;padding:0 12px;background:var(--surface);color:var(--muted);font-size:13.5px;border-inline-start:1px solid var(--border);white-space:nowrap}
.inp.invalid{border-color:var(--red)}
textarea{resize:vertical;min-height:70px}
.check{display:flex;align-items:center;gap:8px;font-size:14.5px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--indigo)}

/* repeatable rows (cheques, invoice items, cost lines) */
.rows{display:grid;gap:10px}
.row{display:grid;gap:8px;align-items:end;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;max-width:100%}background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:10px}
.row .idx{font-size:12px;color:var(--muted);grid-column:1/-1;margin-bottom:-4px}
.row .field label{font-size:12.5px;font-weight:600;margin-bottom:3px}
.row .inp input{padding:8px 10px;font-size:15px}
.add-row{margin-top:10px}
.item-row{display:grid;grid-column:1/-1;grid-template-columns:repeat(3,minmax(0,1fr)) auto;gap:8px;align-items:end;min-width:0;max-width:100%}
.item-row .field-title{grid-column:1/-1}
@media(max-width:520px){.item-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto}.item-row .field-title{grid-column:1/-2}}

/* results */
.result{background:linear-gradient(160deg,var(--lav) 0%,#fff 70%);border:1px solid #C7D2FE}
.result-main{text-align:center;padding:6px 0 14px;border-bottom:1px dashed #C7D2FE;margin-bottom:12px}
.result-main .label{font-size:14px;color:var(--muted)}
.result-main .value{font-size:30px;font-weight:900;color:var(--indigo-dark);line-height:1.5;word-break:break-word}
@media(min-width:800px){.result-main .value{font-size:34px}}
.result-main .value small{font-size:15px;font-weight:600;color:var(--muted);margin-inline-start:4px}
.result-main .sub{font-size:14px;color:var(--ink)}
.kv{display:grid;gap:2px}
.kv div{display:flex;justify-content:space-between;gap:12px;padding:6px 0;border-bottom:1px solid #EEF2F7;font-size:14.5px}
.kv div:last-child{border-bottom:0}
.kv dt{color:var(--muted)}
.kv dd{margin:0;font-weight:700;color:var(--navy);text-align:left}
.kv .pos{color:var(--green)}
.kv .neg{color:var(--red)}
.empty{color:var(--muted);text-align:center;padding:26px 6px;font-size:14.5px}
.alert{background:#FFFBEB;border:1px solid #FDE68A;color:#92400E;border-radius:var(--r-md);padding:10px 12px;font-size:14px}
.share{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;padding-top:14px;border-top:1px solid #E0E7FF}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--navy);color:#fff;padding:9px 16px;border-radius:var(--r-pill);font-size:14px;opacity:0;transition:.2s;pointer-events:none;z-index:60}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--r-md);background:#fff}
table.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
.tbl th,.tbl td{padding:8px 10px;text-align:right;border-bottom:1px solid #EEF2F7;white-space:nowrap}
.tbl th{background:var(--surface);color:var(--muted);font-weight:600;font-size:13px}
.tbl td.n{text-align:left;font-variant-numeric:tabular-nums}
.tbl tfoot td{font-weight:800;color:var(--navy);background:var(--lav2)}
.tbl tr:last-child td{border-bottom:0}

/* bar for shares */
.bar{height:6px;background:#E0E7FF;border-radius:4px;overflow:hidden;min-width:60px}
.bar i{display:block;height:100%;background:var(--indigo)}

/* chart */
.chart{width:100%;height:auto;margin-top:8px}
.chart text{font-family:inherit;font-size:11px;fill:var(--muted)}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-top:4px}
.legend i{display:inline-block;width:12px;height:3px;border-radius:2px;vertical-align:middle;margin-inline-end:5px}

/* ---------- content sections ----------------------------------------- */
.section{margin-top:34px}
.prose{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:22px}
@media(min-width:800px){.prose{padding:30px 34px}}
.prose h2{font-size:21px;margin:0 0 10px}
.prose h3{font-size:17px;margin:22px 0 6px}
.prose p+p,.prose p+ul,.prose ul+p,.prose p+ol,.prose ol+p{margin-top:10px}
.prose ul,.prose ol{padding-inline-start:22px}
.prose li+li{margin-top:4px}
.formula{direction:rtl;background:var(--surface);border:1px solid var(--border);border-inline-start:4px solid var(--indigo);border-radius:var(--r-sm);padding:10px 14px;margin:12px 0;font-weight:700;color:var(--navy)}
.example{background:var(--mint);border:1px solid #A7F3D0;border-radius:var(--r-md);padding:14px 16px;margin-top:14px}
.example strong{color:#065F46}
.faq details{border-bottom:1px solid var(--border);padding:12px 0}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--indigo);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:8px;color:var(--ink)}

.grid-tools{display:grid;gap:14px;grid-template-columns:1fr}
@media(min-width:620px){.grid-tools{grid-template-columns:1fr 1fr}}
@media(min-width:980px){.grid-tools{grid-template-columns:repeat(3,1fr)}}
.tcard{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:18px;color:var(--ink);transition:border-color .15s,transform .15s,box-shadow .15s;height:100%}
.tcard:hover{text-decoration:none;border-color:#A5B4FC;transform:translateY(-2px);box-shadow:var(--shadow-card)}
.tcard .ico{width:40px;height:40px;border-radius:12px;background:var(--lav);color:var(--indigo);display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.tcard .ico svg{width:21px;height:21px}
.tcard h3{font-size:16.5px}
.tcard p{font-size:14px;color:var(--muted)}
.tcard .go{margin-top:auto;padding-top:6px;font-size:13.5px;color:var(--indigo);font-weight:700}
.group-title{font-size:19px;margin:30px 0 12px}

.cta{background:linear-gradient(135deg,var(--indigo) 0%,var(--indigo-dark) 100%);color:#fff;border-radius:var(--r-xl);padding:26px;display:grid;gap:14px;align-items:center}
@media(min-width:800px){.cta{grid-template-columns:1fr auto;padding:30px 36px}}
.cta h2{color:#fff;font-size:21px}
.cta p{color:#E0E7FF;margin-top:4px}
.cta .btn-primary{background:#fff;color:var(--indigo-dark)}
.cta .btn-primary:hover{background:var(--lav)}
.cta .btn-ghost{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}

.related{display:grid;gap:10px;grid-template-columns:1fr}
@media(min-width:700px){.related{grid-template-columns:1fr 1fr}}
.related a{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:12px 14px;color:var(--ink);font-weight:600}
.related a:hover{border-color:#A5B4FC;text-decoration:none;color:var(--indigo)}
.privacy{display:flex;gap:8px;align-items:flex-start;font-size:13px;color:var(--muted);margin-top:12px}
.privacy svg{width:16px;height:16px;color:var(--green);margin-top:3px}

/* ---------- invoice document ----------------------------------------- */
.inv{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:26px;color:#111827;font-size:14px}
.inv-head{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:2px solid var(--navy);padding-bottom:12px;margin-bottom:14px}
.inv-title{font-size:22px;font-weight:900;color:var(--navy)}
.inv-meta{text-align:left;font-size:13.5px}
.inv-meta div{display:flex;gap:8px;justify-content:flex-end}
.inv-parties{display:grid;gap:12px;grid-template-columns:1fr 1fr;margin-bottom:14px}
.inv-party{background:var(--surface);border-radius:var(--r-sm);padding:10px 12px;font-size:13.5px}
.inv-party b{display:block;color:var(--muted);font-size:12px;font-weight:600}
.inv .tbl{min-width:0}
.inv .tbl th,.inv .tbl td{white-space:normal}
.inv-totals{margin-top:12px;margin-inline-start:auto;max-width:340px}
.inv-words{margin-top:10px;background:var(--lav2);border-radius:var(--r-sm);padding:8px 12px;font-size:13.5px}
.inv-notes{margin-top:12px;font-size:13px;white-space:pre-wrap;color:var(--ink)}
.inv-sign{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:34px;font-size:13px;color:var(--muted);text-align:center}
.inv-sign div{border-top:1px dashed var(--faint);padding-top:6px}
.inv-foot{margin-top:18px;font-size:11px;color:var(--faint);text-align:center}

@media print{
  @page{size:A4;margin:12mm}
  body{background:#fff}
  .hdr,.subnav,.ftr,.crumbs,.page-head,.section,.no-print,.toast,.skip{display:none!important}
  .tool{display:block}
  .print-only{display:block!important}
  .inv{border:0;padding:0;border-radius:0}
  .tbl-wrap{border:0;overflow:visible}
  main{padding:0}
}
.print-only{display:none}