:root{
  --bg:#f6f3ec; --surface:#ffffff; --surface-2:#faf7f0; --ink:#1d1a14; --muted:#6c6557; --line:#e6dfd0;
  --gold:#a8790f; --gold-ink:#7a5608; --gold-soft:#f5ead0; --accent-ink:#ffffff;
  --good:#1f7a4a; --bad:#b3372b; --wa:#1fa855;
  --seg-bg:#efe9dc;
  --c-seller:#a8790f; --c-holder:#4f6fb3; --c-state:#8a5aa8; --c-costs:#8a8577; --c-buyer:#1f7a4a;
  --radius:14px; --shadow:0 1px 2px rgba(40,30,10,.06),0 4px 16px rgba(40,30,10,.05);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#15130f; --surface:#1f1c16; --surface-2:#26221b; --ink:#f2ede2; --muted:#a79f8e; --line:#353026;
    --gold:#e0b54a; --gold-ink:#f0c95e; --gold-soft:#3a3020; --accent-ink:#1b1507;
    --good:#4cc283; --bad:#f07a6b; --seg-bg:#2a261e;
    --c-seller:#e0b54a; --c-holder:#7f9ee0; --c-state:#b98ad6; --c-costs:#8f8a7d; --c-buyer:#4cc283;
    --shadow:none; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#15130f; --surface:#1f1c16; --surface-2:#26221b; --ink:#f2ede2; --muted:#a79f8e; --line:#353026;
  --gold:#e0b54a; --gold-ink:#f0c95e; --gold-soft:#3a3020; --accent-ink:#1b1507;
  --good:#4cc283; --bad:#f07a6b; --seg-bg:#2a261e;
  --c-seller:#e0b54a; --c-holder:#7f9ee0; --c-state:#b98ad6; --c-costs:#8f8a7d; --c-buyer:#4cc283;
  --shadow:none; color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
main{max-width:640px;margin:0 auto;padding:0 16px 24px}
button,input,select{font:inherit;color:inherit}
.num,.big,.huge input,table td{font-variant-numeric:tabular-nums}

.top{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:10px 16px;background:#1c1710;color:#f3e6c4;padding-top:max(10px,env(safe-area-inset-top))}
.brand{display:flex;align-items:center;gap:10px}
.brand strong{display:block;font-size:17px;letter-spacing:.2px}
.brand small{display:block;font-size:12px;opacity:.75}
.logo{width:30px;height:30px;color:#e0b54a}
.lang{display:flex;border:1px solid #5a4a28;border-radius:999px;overflow:hidden}
.lang button{background:none;border:0;color:#f3e6c4;padding:6px 12px;font-weight:600;font-size:14px;cursor:pointer}
.lang button[aria-pressed="true"]{background:#e0b54a;color:#1c1710}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;box-shadow:var(--shadow)}
.label{display:block;font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.2px;margin:0 0 6px}
.sub{font-size:13px;color:var(--muted)}
.hint{font-size:12.5px;color:var(--muted);margin:10px 0 0}
h2{font-size:18px;margin:0 0 12px}
h3{font-size:15px;margin:0 0 10px}

.market{margin-top:14px}
.market-row{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}
.big{font-size:30px;font-weight:750;letter-spacing:-.5px;line-height:1.15}
.icon-btn{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;width:42px;height:42px;display:grid;place-items:center;cursor:pointer}
.icon-btn svg{width:20px;height:20px}
.icon-btn.spin svg{animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.fx-line{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px 12px;margin-top:12px;font-size:14px}
.switch{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);cursor:pointer}
.switch input{width:18px;height:18px;accent-color:var(--gold)}
.extra-cur{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:10px;font-size:13px;color:var(--muted)}
.chip-chk{display:inline-flex}
.chip-chk input{position:absolute;opacity:0;pointer-events:none}
.chip-chk span{border:1px solid var(--line);border-radius:999px;padding:4px 10px;cursor:pointer;color:var(--ink);background:var(--surface-2)}
.chip-chk input:checked+span{background:var(--gold-soft);border-color:var(--gold);color:var(--gold-ink);font-weight:600}
.chip-chk input:focus-visible+span{outline:2px solid var(--gold);outline-offset:2px}
.inline-field{margin-top:10px}
.inline-field label{font-size:13px;color:var(--muted);display:block;margin-bottom:4px}

.seg{display:flex;background:var(--seg-bg);border-radius:12px;padding:4px;gap:4px;margin:12px 0 0}
.seg button{flex:1;border:0;background:none;padding:10px 6px;border-radius:9px;font-weight:650;font-size:14.5px;cursor:pointer;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.seg.small button{padding:7px 4px;font-size:13px}

.tabs{display:flex;gap:4px;margin:16px 0 0;border-bottom:1px solid var(--line)}
.tabs button{flex:1;border:0;background:none;padding:12px 4px;font-weight:650;font-size:15px;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-1px}
.tabs button[aria-selected="true"]{color:var(--gold-ink);border-bottom-color:var(--gold)}

.suffix,.with-unit{display:flex;align-items:stretch;border:1.5px solid var(--line);border-radius:12px;background:var(--surface-2);overflow:hidden}
.suffix:focus-within,.with-unit:focus-within{border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft)}
.suffix input,.with-unit input{flex:1;min-width:0;border:0;background:none;padding:11px 12px;font-size:17px;outline:none}
.suffix span{display:flex;align-items:center;padding:0 12px;color:var(--muted);font-weight:600;font-size:14px;white-space:nowrap}
.huge input{font-size:30px;font-weight:750;padding:10px 14px}
.huge span{font-size:22px}
.unit-select{border:0;border-left:1.5px solid var(--line);background:var(--surface);padding:0 10px;font-weight:650;font-size:14px;cursor:pointer;max-width:48%}
.fee-head .unit-select{border:1.5px solid var(--line);border-radius:10px;padding:8px 10px;max-width:60%}
.suffix.sm,.with-unit.sm{width:150px}
.with-unit.sm input{font-size:16px;padding:8px 10px;text-align:right}
.with-unit.sm .unit-select{padding:0 6px;max-width:none}
.suffix.sm input{font-size:16px;padding:8px 10px;text-align:right}
.row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin-top:14px}
.row2 .label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.qty-row{margin-top:14px}
.purity-box{margin-top:16px}
.kchips{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;margin:0 0 10px}
.kchips button{border:1px solid var(--line);background:var(--surface-2);border-radius:10px;padding:6px 2px;cursor:pointer;line-height:1.15}
.kchips button b{display:block;font-size:15px}
.kchips button small{display:block;font-size:11px;color:var(--muted);font-weight:600}
.kchips button[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:var(--accent-ink)}
.kchips button[aria-pressed="true"] small{color:var(--accent-ink);opacity:.85}
.purity-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px;align-items:center}
.purity-row .eq{color:var(--muted);font-weight:700}
.big-switch{font-size:14.5px;color:var(--ink);font-weight:650}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chips button{flex:1 0 auto;border:1px solid var(--line);background:var(--surface-2);border-radius:999px;padding:7px 10px;font-weight:650;cursor:pointer;font-size:14px}
.chips button[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:var(--accent-ink)}

.result{background:linear-gradient(180deg,var(--gold-soft),var(--surface) 70%);border-color:var(--gold)}
.result .headline{font-size:13px;color:var(--gold-ink);font-weight:700;text-transform:uppercase;letter-spacing:.6px}
.result .hero{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0 12px}
.result .hero div{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.result .hero b{display:block;font-size:24px;font-weight:780;letter-spacing:-.4px;line-height:1.2;word-break:break-word}
.result .hero small{color:var(--muted);font-size:12.5px;font-weight:600}
.result .discount-hero{font-size:42px;font-weight:800;letter-spacing:-1px;line-height:1.1;margin:6px 0}
.result .discount-hero.premium{color:var(--bad)}
.result .verdict{font-size:14px;font-weight:600;margin-bottom:10px}
.grid-table{width:100%;border-collapse:collapse;font-size:14px}
.grid-table th,.grid-table td{padding:7px 6px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
.grid-table th:first-child,.grid-table td:first-child{text-align:left;color:var(--muted);font-weight:600}
.grid-table thead th{font-size:12px;color:var(--muted);font-weight:700}
.grid-table tr.total td{font-weight:750;border-bottom:0;padding-top:10px}
.grid-table.stack td{white-space:normal;vertical-align:top}
.grid-table.stack td:first-child{color:var(--ink);font-weight:500}
.grid-table.stack td:first-child small{color:var(--muted)}
.grid-table.stack td:last-child{white-space:nowrap}
.grid-table.stack td:last-child small{display:block;color:var(--muted);font-weight:500;font-size:12.5px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.warn{color:var(--bad);font-weight:600;font-size:13.5px;margin-top:8px}

.actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--line);background:var(--surface);border-radius:12px;padding:11px 14px;font-weight:700;font-size:14.5px;cursor:pointer;flex:1 1 auto;min-height:46px}
.btn svg{width:18px;height:18px}
.btn.wa{background:var(--wa);border-color:var(--wa);color:#fff}
.btn.primary{background:var(--gold);border-color:var(--gold);color:var(--accent-ink)}
.btn:active{transform:translateY(1px)}

.ladder summary,details.card summary{font-weight:700;cursor:pointer;list-style:none}
details.card summary::-webkit-details-marker{display:none}
details.card summary::after{content:"▾";float:right;color:var(--muted)}
details.card:not([open]) summary::after{content:"▸"}
#ladder{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:10px}
#ladder th,#ladder td{padding:8px 6px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
#ladder th:first-child,#ladder td:first-child{text-align:left}
#ladder th{font-size:12px;color:var(--muted)}
#ladder tbody tr{cursor:pointer}
#ladder tbody tr.on{background:var(--gold-soft);font-weight:700}

.fee{padding:12px 0;border-top:1px solid var(--line)}
.fee:first-of-type{border-top:0;padding-top:0}
.fee-head{display:flex;justify-content:space-between;align-items:center;gap:10px;font-weight:650;font-size:14.5px}
.payer{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap;font-size:12.5px}
.payer span{color:var(--muted);align-self:center}
.payer button{border:1px solid var(--line);background:var(--surface-2);border-radius:999px;padding:4px 10px;cursor:pointer;font-size:12.5px;font-weight:600}
.payer button[aria-pressed="true"]{background:var(--ink);color:var(--surface);border-color:var(--ink)}
#royCustomWrap{margin-top:8px;margin-left:auto}

.split{display:flex;height:22px;border-radius:8px;overflow:hidden;margin:12px 0 8px;background:var(--line)}
.split i{display:block;height:100%}
.legend{display:grid;grid-template-columns:1fr auto auto;gap:4px 10px;font-size:13.5px;align-items:center}
.legend .sw{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.legend .v{text-align:right;font-variant-numeric:tabular-nums;font-weight:650}
.legend .p{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}
.who{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.who div{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface)}
.who small{display:block;color:var(--muted);font-weight:650;font-size:12px}
.who b{display:block;font-size:17px;line-height:1.25}
.who em{font-style:normal;color:var(--muted);font-size:12.5px}

.parties{display:grid;gap:10px;margin-top:12px}
.parties label span{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px}
.parties input{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--surface-2)}

.guide h2{margin-top:0}
.guide h3{margin:18px 0 6px;color:var(--gold-ink)}
.guide p,.guide li{font-size:15px}
.guide code{background:var(--surface-2);border:1px solid var(--line);padding:2px 6px;border-radius:6px;font-size:14px}
.guide dl{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;font-size:14.5px}
.guide dt{font-weight:700}
.guide dd{margin:0;color:var(--muted)}
.guide table{width:100%;border-collapse:collapse;font-size:14px}
.guide td,.guide th{border-bottom:1px solid var(--line);padding:6px;text-align:left}
#karatTable td,#karatTable th{white-space:nowrap;text-align:right;font-variant-numeric:tabular-nums}
#karatTable td:first-child,#karatTable th:first-child{text-align:left}

.foot{max-width:640px;margin:0 auto;padding:8px 16px 32px;font-size:12.5px;color:var(--muted);text-align:center}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--surface);padding:10px 16px;border-radius:10px;font-weight:600;opacity:0;transition:.2s;pointer-events:none;z-index:20}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
[hidden]{display:none!important}
button:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

@media (max-width:380px){
  .big{font-size:26px}
  .huge input{font-size:26px}
  .result .hero b{font-size:20px}
  .suffix.sm{width:130px}
}

/* Print: deal sheet only */
.sheet{display:none}
@media print{
  @page{size:A4;margin:14mm}
  body{background:#fff;color:#000}
  .top,main,.foot,.toast{display:none!important}
  .sheet{display:block;font:11pt/1.4 Georgia,"Times New Roman",serif;color:#000}
  .sheet h1{font-size:18pt;margin:0 0 2mm}
  .sheet .meta{font-size:9.5pt;color:#333;margin-bottom:5mm}
  .sheet table{width:100%;border-collapse:collapse;margin:3mm 0 5mm}
  .sheet th,.sheet td{border:1px solid #999;padding:2mm 3mm;text-align:right;font-size:10pt}
  .sheet th:first-child,.sheet td:first-child{text-align:left}
  .sheet thead th{background:#f1ead6}
  .sheet tr.total td{font-weight:bold;background:#faf6ea}
  .sheet h2{font-size:12pt;margin:5mm 0 1mm;border-bottom:1.5px solid #a8790f;padding-bottom:1mm}
  .sheet .sign{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8mm;margin-top:14mm}
  .sheet .sign div{border-top:1px solid #000;padding-top:2mm;font-size:9.5pt;text-align:center}
  .sheet .note{font-size:8.5pt;color:#444;margin-top:8mm}
}