:root{
  --bg:#eeeff2; --ink:#000; --acc:#6a5033; --acc2:#855f4e; --dark:#1d1d1d; --line:#b3b7c2;
  --paper:#fff; --muted:#5b5e66; --rule:#e2e3e7; --soft:#f6f3ee;
  --mono:'Red Hat Mono',ui-monospace,Menlo,monospace;
  --text:'Red Hat Text',system-ui,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font:15px/1.55 var(--text);-webkit-font-smoothing:antialiased;
  background:var(--bg);
  background-image:linear-gradient(to bottom,rgba(179,183,194,.18) 1px,transparent 1px);
  background-size:100% 32px}
a{color:inherit}
button{font:inherit;color:inherit}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;z-index:99;background:#fff;padding:8px}
.mono{font-family:var(--mono)}

/* ---------- top ---------- */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:60px;padding:0 max(24px,calc((100vw - 1320px)/2 + 24px));background:rgba(238,239,242,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{font:600 18px/1 var(--mono);letter-spacing:-.02em;text-decoration:none}
.brand.sm{font-size:14px}
.nav{display:flex;gap:28px}
.nav a{font:500 13px var(--mono);text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--ink)}

/* ---------- desk ---------- */
.desk{max-width:1320px;margin:0 auto;padding:40px 24px 96px;display:grid;
  grid-template-columns:300px minmax(0,1fr);gap:56px;align-items:start}
.panel{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;padding-right:6px;scrollbar-width:thin}
.intro h1{font:500 34px/1.08 var(--mono);letter-spacing:-.035em;margin:0 0 14px}
.intro p{margin:0 0 22px;color:#2b2c30}
.grp{border-top:1px solid var(--line);padding:16px 0 18px}
.grp h3{font:500 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.hint{font-size:12.5px;color:var(--muted);margin:10px 0 0;line-height:1.5}
.hint b{font-weight:500;color:var(--ink);font-family:var(--mono);font-size:12px}
.saved{font:12px var(--mono);color:var(--muted);margin:10px 0 0}
.demo{display:flex;flex-direction:column;gap:6px;padding:12px 14px;margin-bottom:18px;background:var(--paper);
  border-left:3px solid var(--acc);font-size:13.5px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:500 14px/1 var(--mono);
  border:1px solid var(--ink);background:transparent;padding:11px 14px;cursor:pointer;border-radius:2px;
  text-decoration:none;transition:background .15s,color .15s,border-color .15s}
.btn:hover{background:var(--ink);color:var(--bg)}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn.primary:hover{background:var(--acc);border-color:var(--acc)}
.btn.big{width:100%;padding:15px 16px;font-size:15px}
.btn.sm{padding:7px 10px;font-size:12px}
.btn.light{border-color:var(--bg);color:var(--bg)}
.btn.light:hover{background:var(--bg);color:var(--dark)}
.btn[disabled]{opacity:.55;cursor:progress}
kbd{font:11px var(--mono);opacity:.6;border:1px solid currentColor;padding:2px 5px;border-radius:2px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.link{background:none;border:0;padding:0;font:inherit;font-size:inherit;color:var(--acc);text-decoration:underline;
  text-underline-offset:3px;cursor:pointer;align-self:flex-start}
.seg{display:flex;border:1px solid var(--ink);border-radius:2px}
.seg button{flex:1;border:0;background:transparent;padding:10px 8px;font:500 13px var(--mono);cursor:pointer}
.seg button+button{border-left:1px solid var(--ink)}
.seg button[aria-pressed=true]{background:var(--ink);color:var(--bg)}
.in{width:100%;min-width:0;font:14px var(--text);padding:10px 11px;border:1px solid var(--line);background:#fff;
  border-radius:2px;color:var(--ink)}
.in:focus{outline:2px solid var(--acc);outline-offset:-1px;border-color:var(--acc)}
.inline{display:flex;gap:8px;margin-top:10px}
.inline .btn{flex:none}
.tpl{display:flex;flex-wrap:wrap;gap:6px}
.tpl .t{display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--paper);border-radius:2px;font-size:13px}
.tpl .t button{border:0;background:none;padding:7px 10px;cursor:pointer}
.tpl .t button:hover{color:var(--acc)}
.tpl .t .rm{padding:7px 8px 7px 0;color:var(--muted)}
.tpl .t.own{border-color:var(--acc2)}
.cat{list-style:none;margin:10px 0 0;padding:0;max-height:240px;overflow:auto}
.cat li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--rule);font-size:13.5px}
.cat li span{flex:1;min-width:0}
.cat li em{font:normal 12px var(--mono);color:var(--muted);white-space:nowrap}
.cat li button{border:1px solid var(--ink);background:none;width:26px;height:26px;cursor:pointer;flex:none}
.cat li button:hover{background:var(--ink);color:#fff}
.share-out{display:flex;gap:8px;margin-top:10px}

/* ---------- sheet ---------- */
.paper-wrap{display:flex;justify-content:center;min-width:0}
.sheet{position:relative;width:100%;max-width:794px;min-height:1123px;background:var(--paper);padding:56px 56px 40px;
  box-shadow:0 0 0 1px rgba(179,183,194,.7),0 30px 60px -34px rgba(29,29,29,.45);
  container-type:inline-size;font-size:13px;line-height:1.45;display:flex;flex-direction:column}
.lbl{display:block;font:500 9.5px/1.2 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.lbl-in{font:500 10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);flex:none}

.f{display:block;width:100%;min-width:0;font:inherit;color:inherit;background:transparent;border:0;border-radius:0;
  border-bottom:1px dashed transparent;padding:2px 0;outline:0;resize:none;overflow:hidden;
  transition:background .12s,border-color .12s}
.f:hover{border-bottom-color:var(--line)}
.f:placeholder-shown{border-bottom-color:var(--line)}
.f:focus{border-bottom:1px solid var(--acc);background:var(--soft)}
.f::placeholder{color:#a3a7b1;opacity:1}
.f[type=date]{font-family:var(--mono);font-size:12.5px;min-height:24px}
.sel:not(.out){appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:14px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%23b3b7c2'/%3E%3C/svg%3E") no-repeat right 2px center}
.f.bad{border-bottom:1px solid #b3261e;background:rgba(179,38,30,.05)}
.out{display:block;white-space:pre-wrap;border:0!important;background:none!important;min-height:1em}

.s-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;padding-bottom:22px;border-bottom:2px solid var(--ink)}
.logo-box{position:relative;width:170px;height:64px;border:1px dashed var(--line);display:grid;place-items:center;
  color:var(--muted);font:12px var(--mono);cursor:pointer;flex:none}
.logo-box:hover{border-color:var(--acc);color:var(--acc)}
.logo-box.has{border-color:transparent;place-items:center start}
.logo-box.has .logo-ph{display:none}
.logo-box img{max-width:170px;max-height:64px;object-fit:contain;object-position:left center}
.logo-x{position:absolute;top:-10px;right:-10px;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);
  background:#fff;cursor:pointer;line-height:1;font-size:14px}
.doc-title{text-align:right;min-width:0}
.doc-kind{font:600 12px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;margin-bottom:10px}
.doc-no{display:flex;align-items:baseline;gap:10px;justify-content:flex-end}
.doc-no .f{font:500 26px/1.1 var(--mono);letter-spacing:-.02em;text-align:right;width:auto;min-width:4ch;field-sizing:content;max-width:420px}

.s-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 28px;padding:20px 0;border-bottom:1px solid var(--line)}
.s-parties{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:24px 0 26px}
.party{display:flex;flex-direction:column;gap:3px;min-width:0}
.p-name{font-weight:700;font-size:15px}
.nip{display:flex;align-items:baseline;gap:8px;margin-top:2px}
.nip .f{font-family:var(--mono);font-size:12.5px}

.s-items{--cols:22px minmax(0,1fr) 46px 42px 78px 50px 84px 88px 18px}
.sheet[data-mode=zw] .s-items{--cols:22px minmax(0,1fr) 50px 46px 96px 100px 18px}
.sheet.x .s-items{--cols:22px minmax(0,1fr) 46px 42px 78px 50px 84px 88px}
.sheet.x[data-mode=zw] .s-items{--cols:22px minmax(0,1fr) 50px 46px 96px 100px}
.sheet[data-mode=vat] .only-zw,.sheet[data-mode=zw] .only-vat{display:none!important}
.it-head,.it-row{display:grid;grid-template-columns:var(--cols);gap:8px;align-items:start}
.it-head{font:500 9px/1.25 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  padding:0 0 8px;border-bottom:1px solid var(--ink)}
.it-row{padding:8px 0;border-bottom:1px solid var(--rule)}
.r,.num{text-align:right}
.cell{display:block;min-width:0}
.ml{display:none}
.c-lp{font:12px var(--mono);color:var(--muted);padding-top:3px}
.it-row .num,.it-row output,.it-row .c-vat .f,.it-row .c-unit .f{font-family:var(--mono);font-size:12px}
.it-row output{display:block;padding-top:3px;text-align:right;white-space:nowrap}
.c-del button{border:0;background:none;color:var(--line);cursor:pointer;font-size:16px;line-height:1;padding:3px 0 0}
.c-del button:hover{color:var(--acc2)}
.add-row{margin-top:10px;width:100%;text-align:left;font:500 12px var(--mono);color:var(--acc);background:none;
  border:1px dashed var(--line);padding:9px 12px;cursor:pointer}
.add-row:hover{border-color:var(--acc);background:var(--soft)}

.s-sum{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:36px;margin-top:26px}
.s-left{display:flex;flex-direction:column;gap:16px;min-width:0}
.blk .f.mono{font-size:12.5px}
.vt{font:12px var(--mono)}
.vt .vr{display:grid;grid-template-columns:44px 1fr 1fr 1fr;gap:8px;padding:4px 0;text-align:right}
.vt .vr span:first-child{text-align:left}
.vt .vh{font-size:9px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--rule)}
.vt .vs{border-top:1px solid var(--ink);font-weight:500}
.total{margin-top:14px;padding-top:12px;border-top:2px solid var(--ink)}
.amt{font:500 30px/1.1 var(--mono);letter-spacing:-.03em;color:var(--acc);white-space:nowrap}
.words{margin-top:6px;font-size:12px;font-style:italic;color:var(--acc2)}
.zw-note{margin-top:22px;padding:10px 12px;background:var(--soft);border-left:2px solid var(--acc2);font-size:12px}
.s-sign{margin-top:auto;padding-top:56px;display:grid;grid-template-columns:1fr 1fr;gap:80px}
.s-sign>div{display:flex;flex-direction:column;align-items:center}
.s-sign .f{text-align:center}
.s-sign .blank{display:block;height:23px}
.s-sign .sl{display:block;width:100%;margin-top:4px;padding-top:6px;border-top:1px dotted var(--muted);text-align:center;
  font:500 9px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.s-foot{margin-top:26px;text-align:right;font:9px var(--mono);color:#a3a7b1;letter-spacing:.06em}

/* export copy: always the A4 layout */
/* PDF page = A4 with 14 mm top/bottom and 16 mm side margins set in jsPDF; inner area 178 x 269 mm = 673 x 1016 px.
   The sheet fills the inner width exactly and stays a little shorter than the inner height, so it is always one page. */
.sheet.x{width:673px;max-width:none;min-height:1000px;padding:0;box-shadow:none}
.sheet.x .s-sign{padding-top:40px}
.sheet.x .s-foot{margin-top:18px}
.x-host{position:fixed;left:-12000px;top:0;width:673px}
[data-t=hVat]{padding-left:8px}
.c-vat .f{padding-left:8px}
#printArea{display:none}

@container (max-width:620px){
  .s-head{flex-direction:column-reverse;align-items:stretch;gap:18px}
  .doc-title{text-align:left}
  .doc-no{justify-content:flex-start}
  .doc-no .f{text-align:left;font-size:22px}
  .s-meta{grid-template-columns:1fr 1fr;gap:12px 18px}
  .s-parties{grid-template-columns:1fr;gap:22px}
  .it-head{display:none}
  .it-row{grid-template-columns:repeat(4,minmax(0,1fr));grid-template-areas:"name name name del" "qty unit price vat" "net net bru bru";gap:8px 10px;padding:12px 0}
  .sheet[data-mode=zw] .it-row{grid-template-areas:"name name name del" "qty unit price price" "net net net net"}
  .c-lp{display:none}
  .c-name{grid-area:name}.c-qty{grid-area:qty}.c-unit{grid-area:unit}.c-price{grid-area:price}.c-vat{grid-area:vat}
  .c-net{grid-area:net}.c-bru{grid-area:bru}.c-del{grid-area:del;text-align:right}
  .ml{display:block;font:500 9px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:2px}
  .c-net .ml,.c-bru .ml{text-align:right}
  .it-row .num{text-align:left}
  .s-sum{grid-template-columns:1fr;gap:22px}
  .amt{font-size:26px}
  .s-sign{gap:28px}
}

/* ---------- sections ---------- */
.wrap{max-width:1320px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:760px}
.dark{background:var(--dark);color:var(--bg);padding:96px 0}
.dark h2,.faq h2{font:500 clamp(28px,4vw,44px)/1.05 var(--mono);letter-spacing:-.035em;margin:0 0 40px}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.steps li{border-top:1px solid #3a3a3a;padding-top:22px}
.steps .n{font:500 44px/1 var(--mono);color:var(--acc2)}
.steps h3{font:500 17px var(--mono);margin:18px 0 8px}
.steps p{margin:0;color:#b9bbc2}
.faq{padding:96px 0}
.faq details{border-top:1px solid var(--line);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font:500 17px var(--text);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 20px/1 var(--mono);color:var(--acc)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:12px 0 0;color:#2b2c30;max-width:62ch}
.faq code{font:13px var(--mono);background:#fff;padding:1px 5px}
.pay p{color:#b9bbc2;max-width:56ch;margin:-20px 0 28px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.chips button,.chips .own{border:1px solid #4a4a4a;background:none;color:var(--bg);padding:12px 18px;font:500 15px var(--mono);cursor:pointer;border-radius:2px}
.chips button[aria-pressed=true]{background:var(--bg);color:var(--dark);border-color:var(--bg)}
.chips .own{display:flex;align-items:center;gap:6px;cursor:text}
.chips .own input{width:64px;background:none;border:0;border-bottom:1px solid #6a6a6a;color:var(--bg);font:inherit;outline:0}
.pay .btn.big{max-width:340px}
.pay-note{margin:16px 0 0!important;font-size:14px;color:#d8c7b3!important}
.foot{padding:28px 0 40px;border-top:1px solid var(--line);font:12.5px var(--mono);color:var(--muted)}
.foot .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between}
.foot .links{display:flex;gap:18px}
.received{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px max(24px,calc((100vw - 1320px)/2 + 24px));
  background:var(--acc);color:#fff;font-size:14px}
.received .btn{border-color:#fff;color:#fff}
.mbar{display:none}

.lock{position:fixed;inset:0;z-index:60;display:grid;place-items:center;background:rgba(29,29,29,.94);padding:16px}
.lock[hidden]{display:none}
.lock-card{width:100%;max-width:390px;background:var(--bg);padding:32px;display:flex;flex-direction:column;gap:14px}
.lock-card h2{font:500 24px/1.15 var(--mono);letter-spacing:-.02em;margin:8px 0 0}
.lock-card p{margin:0;color:#2b2c30;font-size:14px}
.lock-err{color:#9b2c1f!important;min-height:1.2em}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:70;
  background:var(--dark);color:var(--bg);font:13px var(--mono);padding:12px 16px;border-radius:2px;transition:.25s;max-width:calc(100vw - 32px)}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- motion ---------- */
@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise .55s cubic-bezier(.2,.7,.2,1) both}
  .rise:nth-child(2){animation-delay:.05s}.rise:nth-child(3){animation-delay:.1s}.rise:nth-child(4){animation-delay:.15s}
  .rise:nth-child(5){animation-delay:.2s}.rise:nth-child(6){animation-delay:.25s}.rise:nth-child(7){animation-delay:.3s}
  .rise-sheet{animation:sheet .8s cubic-bezier(.2,.7,.2,1) .1s both}
  .amt.bump{animation:bump .35s ease}
}
@keyframes rise{from{opacity:0;transform:translateY(10px)}}
@keyframes sheet{from{opacity:0;transform:translateY(28px) rotate(-.4deg)}}
@keyframes bump{50%{color:var(--acc2)}}

/* ---------- responsive ---------- */
@media (max-width:1060px){
  .desk{grid-template-columns:1fr;gap:28px;padding-top:28px}
  .panel{position:static;max-height:none;overflow:visible;display:grid;grid-template-columns:1fr 1fr;gap:0 32px;padding:0}
  .panel .intro,.panel .demo{grid-column:1/-1}
  .paper-wrap{order:-1}
  .desk{grid-template-areas:none}
}
@media (max-width:1060px){ .desk>.panel{order:2} .desk>.paper-wrap{order:1} .desk::before{content:none} }
@media (max-width:700px){
  .top{padding:0 16px}
  .nav{gap:16px}.nav a:nth-child(3){display:none}
  .desk{padding:20px 16px 110px}
  .panel{grid-template-columns:1fr}
  .sheet{padding:26px 18px 24px;min-height:0}
  .wrap{padding:0 16px}
  .steps{grid-template-columns:1fr;gap:28px}
  .dark,.faq{padding:64px 0}
  .mbar{display:block;position:fixed;left:0;right:0;bottom:0;z-index:30;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(238,239,242,.95);border-top:1px solid var(--line);backdrop-filter:blur(8px)}
  .received{padding:12px 16px;flex-direction:column;align-items:flex-start}
}

/* ---------- print ---------- */
@media print{
  @page{size:A4;margin:14mm 16mm}
  body{background:#fff}
  body>*:not(#printArea){display:none!important}
  #printArea{display:block}
  #printArea .sheet{box-shadow:none}
}
.lang{display:flex;border:1px solid var(--ink);border-radius:2px}
.lang button{border:0;background:none;padding:6px 9px;font:500 12px/1 var(--mono);cursor:pointer}
.lang button[aria-pressed=true]{background:var(--ink);color:var(--bg)}
.top .nav{margin-left:auto;margin-right:20px}