:root{--red:#b3202a;--red-dark:#8f1720;--ink:#171717;--muted:#6d6d69;--paper:#f4f4f1;--white:#fff;--line:#d9d9d4;--soft:#ecece7;--green:#1f7a3f;--warn:#fbeaea}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);-webkit-text-size-adjust:100%}
body{margin:0;font-size:15px}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1{margin:0;font-size:clamp(22px,3vw,30px)}
h2{font-size:18px;margin:34px 0 12px}
.muted{color:var(--muted)}
.nowrap{white-space:nowrap}
.r{text-align:right}

/* top bar */
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:20px;padding:10px clamp(14px,3vw,36px);background:var(--ink);color:#fff}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:38px;height:38px;object-fit:cover}
.brand strong,.brand small{display:block}
.brand strong{font-size:14px;letter-spacing:.04em}
.brand small{color:#999;font-size:11px;margin-top:2px}
.top nav{display:flex;gap:4px;margin-left:12px;flex:1}
.top nav a{padding:10px 12px;color:#aaa;font-size:14px;font-weight:700;border-bottom:3px solid transparent}
.top nav a:hover{color:#fff}
.top nav a.active{color:#fff;border-color:var(--red)}
.top nav a.cta{margin-left:auto;color:#fff;background:var(--red);border:0}
.top nav a.cta:hover{background:var(--red-dark)}
.top form{margin:0}
.top .link{color:#aaa}

.wrap{max-width:1240px;margin:0 auto;padding:28px clamp(14px,3vw,36px) 80px}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.head p{margin:6px 0 0}
.back{display:inline-block;margin-bottom:8px;color:var(--muted);font-size:13px;font-weight:700}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:42px;padding:0 16px;border:1px solid var(--line);background:var(--white);font-weight:700;font-size:14px;cursor:pointer}
.btn:hover{border-color:var(--ink)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:hover{background:var(--red-dark)}
.btn.in{color:var(--green)}
.btn.out{color:var(--red)}
.btn.sm{min-height:36px;width:40px;padding:0;font-size:20px;line-height:1}
.btn.full{width:100%}
.link{background:none;border:0;padding:0;cursor:pointer;font-weight:700;text-decoration:underline}
.link.danger{color:var(--red)}
.row{display:flex;gap:8px;flex-wrap:wrap}
.row.end{justify-content:flex-end}
.moves-btns{display:inline-flex;gap:6px}

/* flash */
.flash{padding:12px 16px;margin:0 0 20px;border-left:4px solid var(--green);background:#e9f4ec;font-weight:700}
.flash.err{border-color:var(--red);background:var(--warn)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:22px}
.stat{display:block;padding:16px 18px;background:var(--white);border:1px solid var(--line)}
.stat small{display:block;color:var(--muted);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.stat strong{display:block;margin-top:6px;font-size:24px}
.stat em{font-style:normal;font-size:15px;color:var(--muted)}
.stat span{display:block;margin-top:4px;color:var(--red);font-size:13px;font-weight:700}
.stat.warn{border-color:var(--red);background:var(--warn)}
a.stat:hover{border-color:var(--ink)}

/* filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.filters input[type=search]{flex:1 1 260px}
.filters input[type=search],.filters select{min-height:42px;padding:0 12px;border:1px solid var(--line);background:var(--white)}
.check{display:flex;flex-direction:row;align-items:center;gap:8px;padding:0 6px;font-weight:700;font-size:14px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--red)}

/* tables */
.table-wrap{background:var(--white);border:1px solid var(--line);overflow-x:auto}
table{width:100%;border-collapse:collapse}
th{padding:11px 14px;text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:var(--soft);white-space:nowrap}
th.r{text-align:right}
td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:middle}
.stock .name{font-weight:700}
.stock .name:hover{color:var(--red)}
.stock small{display:block;margin-top:3px;color:var(--muted);font-size:12px}
.stock tr.low{background:var(--warn)}
.qtycell{white-space:nowrap}
.qtycell b{font-size:17px}
.badge{display:inline-block;margin-left:8px;padding:2px 6px;background:var(--red);color:#fff;font-size:11px;font-weight:700;text-transform:uppercase;vertical-align:2px}
.tag{display:inline-block;padding:3px 8px;font-size:12px;font-weight:700;background:var(--soft)}
.tag.in{color:var(--green);background:#e9f4ec}
.tag.out{color:var(--red);background:var(--warn)}
.pos{color:var(--green);font-weight:700}
.neg{color:var(--red);font-weight:700}
.empty{padding:40px 20px;text-align:center;background:var(--white);border:1px dashed var(--line);color:var(--muted)}
.empty .btn{margin-left:10px}

/* forms */
.card{background:var(--white);border:1px solid var(--line);padding:22px}
.notes{margin:0 0 10px;line-height:1.5}
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 20px;max-width:820px}
.span2{grid-column:1/-1}
label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:700}
label small{color:var(--muted);font-weight:400}
input:not([type=radio]):not([type=checkbox]),textarea,select{width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--line);background:var(--white);font-weight:400;font-size:16px;border-radius:0}
input:focus,textarea:focus,select:focus{outline:2px solid var(--ink);outline-offset:-1px}
.danger-zone{margin-top:40px;padding-top:16px;border-top:1px solid var(--line)}

/* move dialog */
dialog{width:min(460px,calc(100vw - 24px));padding:0;border:0;box-shadow:0 20px 60px rgba(0,0,0,.35)}
dialog::backdrop{background:rgba(23,23,23,.55)}
dialog form{display:flex;flex-direction:column;gap:14px;padding:22px}
dialog h2{margin:0;font-size:19px}
dialog p{margin:-8px 0 0}
.seg{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line)}
.seg label{display:block;font-size:14px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;padding:11px 4px;text-align:center;cursor:pointer;border-right:1px solid var(--line)}
.seg label:last-child span{border-right:0}
.seg input:checked+span{background:var(--ink);color:#fff}
.seg input[value=in]:checked+span{background:var(--green)}
.seg input[value=out]:checked+span{background:var(--red)}
.qty{display:flex;align-items:center;gap:10px}
.qty input{font-size:22px!important;font-weight:700!important}
.qty b{min-width:40px;color:var(--muted)}

/* login */
.login{max-width:380px;margin:12vh auto 0;padding:32px;background:var(--white);border:1px solid var(--line)}
.login .brand{margin-bottom:24px}
.login .brand small{color:var(--muted)}
.login h1{margin-bottom:18px;font-size:24px}
.login form{display:flex;flex-direction:column;gap:14px}

@media (max-width:820px){
  .top{flex-wrap:wrap;gap:8px}
  .top nav{order:3;flex-basis:100%;margin:0;overflow-x:auto}
  .top nav{scrollbar-width:none}
  .top nav a{padding:8px 9px;white-space:nowrap;flex:none}
  .top form{margin-left:auto}
  .stats{grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:8px}
  .stat{padding:12px}
  .stat strong{font-size:20px}
  .form{grid-template-columns:1fr}
  /* stock table as cards */
  .table-wrap:has(.stock){background:none;border:0}
  .stock thead{display:none}
  .stock,.stock tbody{display:block}
  .stock tr{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:12px 14px;margin-bottom:8px;background:var(--white);border:1px solid var(--line)}
  .stock tr.low{border-color:var(--red)}
  .stock td{padding:0;border:0}
  .stock td:nth-child(1){grid-column:1}
  .stock td:nth-child(2){grid-column:1;grid-row:2;font-size:13px}
  .stock td:nth-child(3){grid-column:1;grid-row:3;font-size:13px}
  .stock td:nth-child(3):empty,.stock td:nth-child(5){display:none}
  .stock td:nth-child(4){grid-column:2;grid-row:1}
  .stock td:nth-child(6){grid-column:2;grid-row:2/span 2;align-self:end}
}

/* QR, skaner, etykiety */
.small{font-size:13px}
.row.between{justify-content:space-between;align-items:center}
.qr-card{display:flex;gap:20px;align-items:center;margin:0 0 10px}
.qr-card canvas{flex:none;width:132px;height:132px;image-rendering:pixelated}
.qr-card p{margin:6px 0 12px}
.scan{max-width:560px;padding:12px}
#reader{width:100%;background:#000;min-height:240px}
#reader video{display:block;width:100%!important}
.scan p{margin:10px 4px 2px}
.scan-manual{max-width:560px;margin-top:12px}
.scan-manual input{flex:1 1 200px;min-height:42px}
.labels{display:grid;grid-template-columns:300px minmax(0,1fr);grid-template-areas:"opts pick" "opts preview";gap:16px;align-items:start}
.labels h2{margin:0 0 12px;font-size:16px}
.label-opts{grid-area:opts;display:flex;flex-direction:column;gap:14px;position:sticky;top:80px}
.label-opts .row label{flex:1}
.label-actions{display:flex;flex-direction:column;gap:8px}
.label-pick{grid-area:pick}
.label-pick input[type=search]{margin-bottom:10px}
.pick-list{max-height:300px;overflow:auto;border:1px solid var(--line)}
.pick{padding:9px 12px;border-bottom:1px solid var(--soft);font-weight:400;font-size:14px}
.pick:last-child{border-bottom:0}
.pick small{margin-left:6px}
.label-preview{grid-area:preview}
[data-preview]{display:flex;flex-wrap:wrap;gap:12px}
[data-preview] canvas{background:#fff;border:1px solid var(--line);box-shadow:0 2px 6px rgba(0,0,0,.08);height:auto;image-rendering:pixelated}
.print-area{display:none}
@media print{
  body>*:not(.print-area){display:none!important}
  .print-area{display:block}
  .print-area img{display:block;break-after:page;image-rendering:pixelated}
  html,body{background:#fff;margin:0}
}
@media (max-width:820px){
  .labels{grid-template-columns:1fr;grid-template-areas:"pick" "opts" "preview"}
  .label-opts{position:static}
  .qr-card{flex-direction:column;align-items:flex-start}
}

/* diagnostyka Bluetooth */
.bt{display:flex;flex-direction:column;gap:14px;max-width:900px}
.bt-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:12px}
.bt-log{margin:0;min-height:220px;max-height:420px;overflow:auto;padding:12px;background:#111;color:#cfe8d0;font:12px/1.5 ui-monospace,Menlo,monospace;white-space:pre-wrap}
@media (max-width:820px){.bt-grid{grid-template-columns:1fr 1fr}}