:root{
  --bg:#f4f5f7; --panel:#fff; --ink:#1b1f24; --muted:#6b7380; --line:#e3e6ea; --soft:#f8f9fa;
  --brand:#c8102e; --brand-ink:#fff; --brand-soft:#fdecef;
  --side:#15181d; --side-ink:#c9ced6; --side-hi:#fff;
  --ok:#147a3d; --ok-bg:#e6f4ea; --bad:#b42318; --bad-bg:#fdecea; --warn:#8a5a00; --warn-bg:#fff4dc; --info:#1d4ed8; --info-bg:#e8efff;
  --r:10px; --font:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:14px/1.5 var(--font);color:var(--ink);background:var(--bg)}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 .5em;line-height:1.25}
h2{font-size:18px} h3{font-size:15px}
code{background:var(--soft);padding:1px 5px;border-radius:4px;border:1px solid var(--line)}
.muted{color:var(--muted)} .center{text-align:center} .right{text-align:right} .nowrap{white-space:nowrap}
.inline{display:inline}

/* shell */
.shell{display:flex;min-height:100vh}
.side{width:236px;flex:none;background:var(--side);color:var(--side-ink);padding:18px 12px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:block;font-weight:800;font-size:22px;letter-spacing:-.5px;color:#fff;margin:0 8px 6px}
.brand span{color:var(--brand)}
.brand:hover{text-decoration:none}
.shopname{margin:0 8px 14px;color:#fff;font-weight:600;font-size:13px;border-bottom:1px solid #2a2f37;padding-bottom:12px}
.shopname small{display:block;color:var(--side-ink);font-weight:400}
.navgroup{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#7d8590;margin:14px 8px 4px}
.side nav a{display:flex;align-items:center;gap:10px;color:var(--side-ink);padding:7px 8px;border-radius:7px;font-size:13.5px}
.side nav a:hover{background:#20252c;text-decoration:none;color:#fff}
.side nav a.on{background:var(--brand);color:#fff}
.side svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.main{flex:1;min-width:0}
.top{display:flex;align-items:center;gap:14px;background:var(--panel);border-bottom:1px solid var(--line);padding:12px 24px;position:sticky;top:0;z-index:5}
.top h1{font-size:18px;margin:0;flex:1}
.who{font-size:13px}
.menu{display:none}
.content{padding:22px 24px;max-width:1280px}

/* elements */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--panel);color:var(--ink);padding:8px 14px;border-radius:8px;font:inherit;font-weight:600;cursor:pointer;white-space:nowrap}
.btn:hover{text-decoration:none;border-color:#c9ced6}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{filter:brightness(1.05)}
.btn.danger{color:var(--bad);border-color:#f2c1bc}
.btn.sm{padding:4px 10px;font-size:12.5px}
.btn.block{width:100%;justify-content:center}
.link{background:none;border:0;color:var(--brand);cursor:pointer;font:inherit;padding:0}
.iconbtn{background:none;border:1px solid var(--line);border-radius:7px;padding:4px 9px;cursor:pointer;font-size:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:18px}
.card.empty{text-align:center;padding:40px}
.bar{display:flex;flex-wrap:wrap;gap:10px;align-items:end;margin-bottom:14px}
.bar .grow{flex:1}
.bar form{display:flex;flex-wrap:wrap;gap:8px;align-items:end}

label{display:flex;flex-direction:column;gap:4px;font-size:12.5px;font-weight:600;color:#3b424c}
input,select,textarea{font:inherit;font-weight:400;color:var(--ink);background:#fff;border:1px solid #cfd4da;border-radius:7px;padding:8px 10px;width:100%;min-width:0}
input:focus,select:focus,textarea:focus{outline:2px solid #f3b3bd;border-color:var(--brand)}
textarea{min-height:70px;resize:vertical}
input[type=checkbox]{width:auto}
.check{flex-direction:row;align-items:center;gap:8px;font-weight:500}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 16px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px 16px}
.span2{grid-column:span 2} .span3{grid-column:span 3} .span4{grid-column:1/-1}
.stack{display:flex;flex-direction:column;gap:12px}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}

table.t{width:100%;border-collapse:collapse;background:var(--panel)}
.t th,.t td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.t th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:var(--soft);font-weight:600}
.t tr:hover td{background:#fcfcfd}
.t td.num,.t th.num{text-align:right;white-space:nowrap}
.t tfoot td{font-weight:700;background:var(--soft)}
.tablewrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow-x:auto;margin-bottom:18px}
.tablewrap .t tr:last-child td{border-bottom:0}

.badge{display:inline-block;padding:1px 8px;border-radius:20px;font-size:11.5px;font-weight:600}
.badge.ok{background:var(--ok-bg);color:var(--ok)} .badge.bad{background:var(--bad-bg);color:var(--bad)}
.badge.warn{background:var(--warn-bg);color:var(--warn)} .badge.info{background:var(--info-bg);color:var(--info)}
.badge.muted{background:#eef0f2;color:var(--muted)}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-weight:500}
.flash.ok{background:var(--ok-bg);color:var(--ok)} .flash.bad{background:var(--bad-bg);color:var(--bad)} .flash.warn{background:var(--warn-bg);color:var(--warn)}
.chip{display:inline-block;background:#eef0f2;border-radius:5px;padding:0 6px;font-size:11.5px;margin:1px 2px 1px 0;color:#3b424c}
.low{color:var(--bad);font-weight:700}

.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.kpi b{display:block;font-size:22px;letter-spacing:-.5px;margin-top:2px}
.kpi span{font-size:12.5px;color:var(--muted)}
.kpi.accent{border-top:3px solid var(--brand)}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}

.pager{display:flex;gap:6px;align-items:center;justify-content:flex-end;margin:-6px 0 18px;font-size:13px}
.pager span{margin-right:auto;color:var(--muted)}
.pager a,.pager b{padding:3px 9px;border-radius:6px;border:1px solid var(--line);background:#fff}
.pager b{background:var(--brand);color:#fff;border-color:var(--brand)}

/* line item editor */
.lines td{padding:6px}
.lines input{padding:6px 8px}
.lines .desc{min-width:240px}
.lines .n{width:90px;text-align:right}
.lines .del{color:var(--bad);background:none;border:0;cursor:pointer;font-size:18px}
.picker{position:relative}
.picker .drop{position:absolute;z-index:20;left:0;right:0;top:100%;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.12);max-height:280px;overflow:auto;display:none}
.picker .drop div{padding:7px 10px;cursor:pointer;border-bottom:1px solid #f1f2f4}
.picker .drop div:hover,.picker .drop div.hi{background:var(--brand-soft)}
.picker .drop small{color:var(--muted);display:block}
.totals{margin-left:auto;width:320px}
.totals td{padding:5px 8px}
.totals tr.grand td{font-size:17px;font-weight:800;border-top:2px solid var(--ink)}

/* auth */
body.auth{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;background:linear-gradient(160deg,#15181d 0 40%,var(--bg) 40%)}
.auth-card{background:#fff;border-radius:14px;padding:30px;width:100%;max-width:400px;box-shadow:0 20px 50px rgba(0,0,0,.15)}
.auth-card.wide{max-width:620px}
.auth-card .brand{color:var(--ink);margin:0 0 2px;font-size:26px}
.auth-card .tag{color:var(--muted);margin:0 0 20px}

/* print documents */
.doc{background:#fff;max-width:820px;margin:0 auto;padding:28px;border:1px solid var(--line);border-radius:var(--r)}
.doc-head{display:flex;justify-content:space-between;gap:20px;border-bottom:3px solid var(--brand);padding-bottom:12px;margin-bottom:14px}
.doc-head h2{font-size:22px;margin:0}
.doc-head img{max-height:64px;max-width:160px}
.doc-title{font-size:18px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;text-align:right}
.doc-meta{display:grid;grid-template-columns:1fr 1fr;gap:4px 24px;margin-bottom:14px;font-size:13px}
.doc .t th{background:#f2f3f5}
.doc-foot{margin-top:24px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}
.sign{margin-top:46px;display:flex;justify-content:space-between}
.sign div{border-top:1px solid #999;padding-top:4px;width:200px;text-align:center;font-size:12px}
.doc.thermal{max-width:302px;padding:8px;font-size:12px;border:0}
.doc.thermal .doc-head{display:block;text-align:center;border-bottom:1px dashed #000}
.doc.thermal .doc-title{text-align:center;font-size:14px}
.doc.thermal .doc-meta{grid-template-columns:1fr}
.doc.thermal .t th,.doc.thermal .t td{padding:3px 2px;font-size:11.5px}
.doc.thermal .sign{display:none}
.noprint{}
@media print{
  body{background:#fff}
  .side,.top,.noprint,.flash{display:none!important}
  .content{padding:0;max-width:none}
  .doc{border:0;padding:0;max-width:none}
  .doc.thermal{max-width:72mm}
  @page{margin:10mm}
}

@media (max-width:900px){
  .side{position:fixed;left:-260px;z-index:30;transition:left .2s}
  .side.open{left:0}
  .menu{display:inline-block}
  .kpis{grid-template-columns:1fr 1fr}
  .cols,.grid3,.grid4{grid-template-columns:1fr 1fr}
  .content{padding:16px}
  .who .muted{display:none}
}
@media (max-width:560px){
  .grid2,.grid3,.grid4,.cols{grid-template-columns:1fr}
  .span2,.span3{grid-column:auto}
  .totals{width:100%}
}