:root{
  --bg:#0b1020;
  --bg-2:#111a33;
  --panel:#16203c;
  --panel-2:#1c2949;
  --line:#2a3760;
  --txt:#e8edf9;
  --muted:#9aa8cc;
  --gold:#e9b949;
  --gold-2:#f7d580;
  --accent:#4e8cff;
  --green:#3ec98a;
  --red:#ff6b6b;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.28);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Vazirmatn',system-ui,'Segoe UI',Tahoma,sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%,#1a2a55 0%,var(--bg) 55%) no-repeat,var(--bg);
  color:var(--txt);
  line-height:2;
  font-size:15px;
}
.wrap{max-width:1240px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.7;margin:0 0 .6em}
h2{font-size:1.5rem;color:var(--gold-2)}
h3{font-size:1.05rem;color:var(--gold)}
p{margin:0 0 1em}
a{color:var(--accent);text-decoration:none}
ul,ol{margin:0 0 1em;padding-inline-start:1.4em}
.muted{color:var(--muted)}
.small{font-size:.85rem}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:0;z-index:40;background:rgba(11,16,32,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px}
.brand small{display:block;color:var(--muted);font-size:.75rem;line-height:1.4}
.logo{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--gold),#b98b1d);color:#231a02;font-weight:800}
.nav{display:flex;gap:6px;flex-wrap:wrap}
.nav a{color:var(--muted);padding:5px 11px;border-radius:999px;font-size:.85rem;border:1px solid transparent}
.nav a:hover{color:var(--txt);border-color:var(--line);background:var(--panel)}

/* ---------- hero ---------- */
.hero{padding:64px 0 40px;border-bottom:1px solid var(--line)}
.hero h1{font-size:2rem;max-width:22ch;background:linear-gradient(90deg,#fff,var(--gold-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:80ch;color:#cdd7f0}
.pill{display:inline-block;font-size:.78rem;color:var(--gold);border:1px solid rgba(233,185,73,.35);background:rgba(233,185,73,.08);padding:3px 12px;border-radius:999px;margin-bottom:18px}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 28px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.kpi b{display:block;font-size:1.6rem;color:var(--gold)}
.kpi span{color:var(--muted);font-size:.85rem}

/* ---------- blocks ---------- */
.block{padding:46px 0;border-bottom:1px solid var(--line)}
.block:last-of-type{border-bottom:none}
.disclaimer p{border-inline-start:3px solid var(--gold);background:rgba(233,185,73,.06);padding:14px 16px;border-radius:10px;max-width:100ch}

.grid{display:grid;gap:14px}
.cards{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card p,.card li{color:#c6d0ea;font-size:.92rem}
.card ul{margin-bottom:0}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:14px}

/* ---------- tables ---------- */
.table-scroll{overflow-x:auto;border-radius:12px;border:1px solid var(--line);margin-bottom:14px}
.tbl{width:100%;border-collapse:collapse;min-width:620px;background:var(--panel)}
.tbl th,.tbl td{padding:10px 12px;text-align:right;border-bottom:1px solid var(--line);font-size:.9rem;vertical-align:middle}
.tbl thead th{background:var(--panel-2);color:var(--gold);font-weight:700;white-space:nowrap}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl tbody tr:hover{background:rgba(78,140,255,.06)}
.tbl.compact th,.tbl.compact td{padding:7px 10px;font-size:.85rem}
.tbl .num{font-variant-numeric:tabular-nums;white-space:nowrap}
.tbl .grp td{background:var(--panel-2);color:var(--gold-2);font-weight:700}
.badge{display:inline-block;font-size:.72rem;padding:1px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.badge.once{border-color:rgba(78,140,255,.4);color:#8fb6ff}
.badge.monthly{border-color:rgba(62,201,138,.4);color:var(--green)}
.badge.yearly{border-color:rgba(233,185,73,.4);color:var(--gold)}

/* ---------- buttons & fields ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--panel-2);color:var(--txt);
  padding:9px 16px;border-radius:10px;cursor:pointer;font:inherit;font-size:.88rem;transition:.15s}
.btn:hover{border-color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--gold),#c9962a);color:#231a02;border-color:transparent;font-weight:700}
.btn.ghost{background:transparent}
.btn.danger:hover{border-color:var(--red);color:var(--red)}
.btn.tiny{padding:5px 11px;font-size:.8rem}
.btn.active{border-color:var(--gold);box-shadow:0 0 0 1px var(--gold) inset}
.btn-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.file-btn{position:relative}

.field{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.field span{color:var(--muted);font-size:.85rem;flex:1}
.field input,.field select{
  width:140px;background:var(--bg-2);border:1px solid var(--line);color:var(--txt);
  border-radius:9px;padding:6px 10px;font:inherit;font-size:.85rem;text-align:center
}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent)}
.field.wide input{width:180px}

.field-col{display:block;margin-bottom:10px}
.field-col > span{display:block;color:var(--muted);font-size:.82rem;margin-bottom:4px}
.field-col textarea,.field-col input{
  width:100%;background:var(--bg-2);border:1px solid var(--line);color:var(--txt);
  border-radius:9px;padding:8px 10px;font:inherit;font-size:.82rem;line-height:1.9;resize:vertical
}
.field-col textarea:focus,.field-col input:focus{outline:none;border-color:var(--accent)}

.proposal-pre{
  white-space:pre-wrap;word-break:break-word;direction:rtl;text-align:right;
  font-family:'Vazirmatn',system-ui,Tahoma,sans-serif;font-size:.87rem;line-height:2.1;
  background:var(--bg-2);border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;margin:0;max-height:70vh;overflow:auto;color:#dde4f6
}
.proposal-pre::-webkit-scrollbar{width:7px}
.proposal-pre::-webkit-scrollbar-thumb{background:var(--line);border-radius:9px}

/* برگهٔ پیش‌فاکتور رسمی — همیشه با تم روشن، هم برای پیش‌نمایش و هم برای گرفتن خروجی PDF */
.print-invoice{
  display:block;background:#ffffff;color:#1a1a1a;border-radius:14px;
  box-shadow:0 12px 32px rgba(0,0,0,.35);padding:22px 24px;max-width:780px;
  margin:16px auto 0;font-size:.85rem;line-height:1.9
}
.invoice-head,.invoice-meta,.invoice-summary,.invoice-foot{display:flex;justify-content:space-between;gap:18px}
.invoice-head{align-items:center;flex-wrap:wrap}
.invoice-brand{display:flex;align-items:center;gap:12px}
.invoice-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#e9b949,#b98b1d);color:#231a02;font-weight:900;font-size:1.05rem;flex-shrink:0}
.invoice-brand strong,.invoice-brand small{display:block;color:#1a1a1a}
.invoice-brand small{color:#666;font-size:.72rem}
.invoice-title{text-align:left}.invoice-title span,.invoice-title strong{display:block}.invoice-title span{color:#666;font-size:.82rem}.invoice-title strong{font-size:1.2rem;color:#a8791c}
.invoice-rule{height:3px;background:linear-gradient(90deg,#e9b949,#4e8cff);margin:14px 0 18px;border-radius:3px}
.invoice-meta{border:1px solid #ddd;border-radius:10px;padding:10px 14px;margin-bottom:16px;flex-wrap:wrap}
.invoice-meta span,.invoice-meta strong,.invoice-summary span,.invoice-summary strong{display:block}.invoice-meta span,.invoice-summary span{color:#777;font-size:.72rem}.invoice-meta strong{font-size:.85rem;color:#1a1a1a}
.invoice-intro{color:#333;font-size:.82rem;margin-bottom:14px}
.invoice-table{width:100%;border-collapse:collapse;margin-bottom:14px}.invoice-table th,.invoice-table td{border:1px solid #ddd;padding:7px 8px;text-align:right;font-size:.78rem;color:#1a1a1a}.invoice-table th{background:#f3f3f3;color:#a8791c}.invoice-table td small{display:block;color:#777;font-size:.66rem}.invoice-table td:first-child{width:42px;text-align:center}.invoice-table td:nth-child(3){width:70px;text-align:center;white-space:nowrap}.invoice-table td:nth-child(n+4){white-space:nowrap}
.invoice-summary{justify-content:flex-start;flex-wrap:wrap;border:1px solid #ddd;padding:10px 12px;border-radius:10px}.invoice-summary > div{min-width:145px}.invoice-summary strong{font-size:.88rem;color:#1a1a1a}.invoice-summary .invoice-total{margin-inline-start:auto;padding:8px 14px;border-radius:8px;background:#f7f0dd;border:1px solid #b98b1d}.invoice-summary .invoice-total span{color:#a8791c}.invoice-summary .invoice-total strong{font-size:1.08rem;color:#7d5a0d}
.invoice-foot{margin-top:18px;border-top:1px solid #ddd;padding-top:12px}.invoice-foot > div{flex:1}.invoice-foot strong{font-size:.82rem;color:#a8791c}.invoice-foot p{color:#666;font-size:.72rem;margin:4px 0 0}.signature-line{padding-top:20px;border-bottom:1px dashed #999;max-width:180px}
.invoice-footer{text-align:center;color:#888;font-size:.68rem;margin-top:24px;padding-top:8px;border-top:1px solid #ddd}
@media (max-width:760px){
  .print-invoice{padding:16px;font-size:.78rem}
  .invoice-head,.invoice-meta,.invoice-summary,.invoice-foot{flex-direction:column;gap:10px}
  .invoice-title{text-align:right}
}

/* ---------- calculator ---------- */
.calc{display:grid;grid-template-columns:minmax(300px,380px) 1fr;gap:16px;align-items:start}
.calc-inputs{position:sticky;top:78px;max-height:calc(100vh - 96px);overflow-y:auto;padding-inline-start:4px}
.calc-inputs::-webkit-scrollbar{width:7px}
.calc-inputs::-webkit-scrollbar-thumb{background:var(--line);border-radius:9px}
.qgroup{margin-bottom:14px}
.qgroup > h4{margin:0 0 6px;font-size:.86rem;color:var(--gold);border-bottom:1px dashed var(--line);padding-bottom:4px}

.totals{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-bottom:14px}
.total-box{background:linear-gradient(160deg,var(--panel-2),var(--panel));border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.total-box span{display:block;color:var(--muted);font-size:.8rem}
.total-box b{display:block;font-size:1.12rem;color:var(--gold-2);font-variant-numeric:tabular-nums;margin-top:2px;white-space:nowrap}
.total-box.main{border-color:var(--gold);box-shadow:0 0 0 1px rgba(233,185,73,.25) inset}
.total-box.main b{color:#fff;font-size:1.28rem}
.total-box small{color:var(--muted);font-size:.72rem}

.coeffs{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
#priceEditor .qgroup{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:12px}
.note{color:var(--green);font-size:.85rem;min-height:1.6em}

@media (max-width:960px){
  .calc{grid-template-columns:1fr}
  .calc-inputs{position:static;max-height:none;overflow:visible}
  .hero h1{font-size:1.55rem}
}

@media print{
  .topbar,.hero,.nav,.btn-row,.calc-inputs,#settings,#principles,#discovery,.footer{display:none !important}
  body{background:#fff;color:#000}
  .panel,.card,.tbl{background:#fff;border-color:#bbb}
  .tbl th{background:#eee;color:#000}
  .total-box b,h2,h3{color:#000}
  .proposal-pre{background:#fff;color:#000;border:none;max-height:none;overflow:visible;padding:0}
  .print-invoice{box-shadow:none}
}

/* چاپ فقط متن پیش‌فاکتور */
@media print{
  body.print-proposal > main > section:not(#proposal){display:none !important}
  body.print-proposal #proposal > h2,
  body.print-proposal #proposal > p.muted{display:none !important}
}

@media print{
  body.print-invoice-mode > .topbar,
  body.print-invoice-mode > .hero,
  body.print-invoice-mode > main > section:not(#proposal),
  body.print-invoice-mode > .footer,
  body.print-invoice-mode #proposal > h2,
  body.print-invoice-mode #proposal > p.muted,
  body.print-invoice-mode #proposal > .calc,
  body.print-invoice-mode #proposal > .btn-row,
  body.print-invoice-mode #proposal > .note{display:none !important}
  body.print-invoice-mode{background:#fff;color:#000}
  body.print-invoice-mode #proposal{display:block;padding:0;margin:0}
  body.print-invoice-mode #invoiceSheet{display:block;color:#000;background:#fff;padding:0;max-width:none}
}