:root{
  --bg:#0b0f14; --bg2:#111823; --card:#151d29; --card2:#1b2432; --line:#26313f;
  --txt:#e8eef6; --muted:#8fa0b4; --acc:#3ea6ff; --ok:#2ecc71; --warn:#f5a524; --err:#ff5d5d;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 600px at 20% -10%,#16243a 0%,var(--bg) 55%) fixed,var(--bg);
  color:var(--txt); font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; padding-bottom:40px;
}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);background:rgba(11,15,20,.75);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px}
.logo{font-size:20px;color:var(--acc);letter-spacing:-2px}
.brand-name{font-weight:700;font-size:17px;letter-spacing:.3px}
.brand-sub{font-size:11px;color:var(--muted)}
.chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.chip{background:var(--card2);border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:12px;color:var(--muted)}
.chip b{color:var(--txt)}
.chip.warn b{color:var(--warn)}
.chip.err b{color:var(--err)}

.tabs{display:flex;gap:6px;padding:10px 16px 0;overflow-x:auto;position:sticky;top:59px;background:linear-gradient(180deg,rgba(11,15,20,.95),rgba(11,15,20,.75));z-index:15;backdrop-filter:blur(8px)}
.tab{background:transparent;border:1px solid transparent;color:var(--muted);padding:9px 16px;border-radius:10px 10px 0 0;font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap}
.tab.active{color:var(--txt);background:var(--card);border-color:var(--line);border-bottom-color:var(--card)}
main{padding:16px;max-width:1100px;margin:0 auto}
.panel-view{display:none}
.panel-view.active{display:block}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.card-title{font-weight:700;margin-bottom:6px}
.muted{color:var(--muted);font-size:13px}
code{background:var(--card2);padding:1px 5px;border-radius:5px;font-size:12px}

.input,.select{width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:11px 12px;font-size:15px;outline:none}
.input:focus,.select:focus{border-color:var(--acc);box-shadow:0 0 0 3px rgba(62,166,255,.15)}
.input::placeholder{color:#5f7286}
select.select{appearance:none}
.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);white-space:nowrap}

.btn{border:1px solid var(--line);background:var(--card2);color:var(--txt);border-radius:10px;padding:10px 14px;font-size:14px;font-weight:600;cursor:pointer;transition:.12s}
.btn:hover{border-color:#3a4a5e}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#04121f}
.btn.primary:hover{filter:brightness(1.08)}
.btn.big{width:100%;padding:15px;font-size:16px;margin-top:10px}
.btn.ghost{background:transparent;border:1px solid var(--line);min-width:44px;min-height:44px}
.kbd{font-size:11px;opacity:.7;border:1px solid rgba(0,0,0,.3);border-radius:5px;padding:1px 5px;margin-left:6px}

.scan-card{padding:12px}
.scan-row{display:flex;gap:8px}
.scan-input{flex:1;background:#0a121b;border:2px solid var(--acc);border-radius:12px;color:#fff;padding:16px;font-size:20px;letter-spacing:.5px;outline:none;font-weight:600}
.scan-input::placeholder{font-size:15px;font-weight:400;color:#54687d;letter-spacing:0}
.scan-hint{font-size:12px;color:var(--muted);margin-top:8px}

.flash{border-radius:12px;padding:12px 14px;margin-bottom:12px;font-weight:600;border:1px solid}
.flash.ok{background:rgba(46,204,113,.12);border-color:rgba(46,204,113,.5);color:#9df3c0}
.flash.err{background:rgba(255,93,93,.12);border-color:rgba(255,93,93,.5);color:#ffb3b3}
.flash.info{background:rgba(62,166,255,.12);border-color:rgba(62,166,255,.5);color:#a9d7ff}

.item-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px}
.item-name{font-size:19px;font-weight:700}
.item-meta{font-size:12.5px;color:var(--muted);margin-top:3px}
.qty-now{text-align:right;min-width:120px}
.qty-now-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.6px}
.qty-now-value{font-size:30px;font-weight:800;color:var(--acc);line-height:1.1}
.barcode-pill{background:var(--card2);border:1px solid var(--line);border-radius:8px;padding:7px 11px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}

.seg{display:inline-flex;background:var(--bg2);border:1px solid var(--line);border-radius:11px;padding:3px;gap:3px;margin-bottom:12px}
.seg.small{margin-bottom:0}
.seg-btn{background:transparent;border:0;color:var(--muted);padding:8px 16px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer}
.seg-btn.active{background:var(--acc);color:#04121f}
.seg.small .seg-btn{padding:7px 12px;font-size:13px}

.qty-editor{display:flex;gap:8px;align-items:stretch;margin-bottom:10px}
.qty-input{flex:1;min-width:0;text-align:center;font-size:26px;font-weight:800;background:#0a121b;border:2px solid var(--line);border-radius:12px;color:#fff;padding:8px;outline:none}
.qty-input:focus{border-color:var(--acc)}
.step{width:64px;font-size:17px;font-weight:700;background:var(--card2);border:1px solid var(--line);color:var(--txt);border-radius:12px;cursor:pointer}
.step:active{background:var(--acc);color:#04121f}
.row{margin-top:10px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.field{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted)}
.new-card{border-color:#3a4a5e}

.session-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.session-title{font-weight:700;font-size:16px}
.label-input{max-width:220px}
.badge{background:var(--acc);color:#04121f;border-radius:999px;padding:2px 9px;font-size:12px;font-weight:800}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
.table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:520px}
.table th{text-align:left;padding:9px 10px;background:var(--card2);color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px;white-space:nowrap}
.table td{padding:9px 10px;border-top:1px solid var(--line);vertical-align:middle}
.table tr:hover td{background:rgba(62,166,255,.04)}
.empty-row td{color:var(--muted);text-align:center;padding:22px;font-size:13px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}
.pos{color:var(--ok);font-weight:700}
.neg{color:var(--err);font-weight:700}
.pill{display:inline-block;background:var(--card2);border:1px solid var(--line);border-radius:999px;padding:2px 9px;font-size:11.5px;color:var(--muted)}
.session-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.session-actions .btn.big{width:auto;flex:1;min-width:200px}
.icon-btn{background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:8px;width:30px;height:30px;cursor:pointer;font-size:15px;line-height:1}
.icon-btn:hover{color:var(--err);border-color:var(--err)}
.qty-cell{display:flex;align-items:center;gap:6px}
.qty-cell input{width:78px;text-align:center;background:var(--bg2);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:6px;font-weight:700;font-size:14px}
.gen-result{margin-top:12px;background:rgba(46,204,113,.1);border:1px solid rgba(46,204,113,.45);border-radius:12px;padding:12px;font-size:14px}
.gen-result a{color:#9df3c0;font-weight:700}
.toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.toolbar .input{flex:1;min-width:170px}
.toolbar .select{width:auto;min-width:150px}
@media (max-width:640px){
  .grid2{grid-template-columns:1fr}
  .qty-now{min-width:90px}
  .step{width:52px}
  .scan-input{font-size:18px;padding:14px}
  .item-name{font-size:17px}
  .session-actions .btn.big{min-width:100%}
  .brand-sub{display:none}
}

/* number inputs: the ± buttons are the intended control, not the native spinner */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield;appearance:textfield}

/* ------------------------------------------------------------ camera scan */
.cam-card{margin-top:12px;padding-top:12px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.cam-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.cam-title{font-weight:600;font-size:14px;display:flex;align-items:center;gap:8px}
.cam-chip{font-size:11px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;padding:2px 8px;border-radius:999px;background:var(--card2);border:1px solid var(--line);color:var(--muted)}
.cam-btns{display:flex;gap:6px}
.cam-btns .btn{min-width:46px;min-height:46px;padding:6px;font-size:16px}
.cam-stage{position:relative;background:#000;border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9;width:100%}
.cam-stage video{width:100%;height:100%;object-fit:contain;display:block}
.cam-reticle{position:absolute;left:7%;right:7%;top:26%;bottom:26%;border:2px solid rgba(62,166,255,.85);border-radius:12px;box-shadow:0 0 0 9999px rgba(0,0,0,.35);pointer-events:none}
.cam-status{position:absolute;left:10px;bottom:10px;right:10px;font-size:12px;background:rgba(0,0,0,.7);color:var(--txt);padding:5px 10px;border-radius:999px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cam-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;line-height:1.4}
.cam-foot select{max-width:45%;background:var(--card2);color:var(--txt);border:1px solid var(--line);border-radius:8px;padding:6px 8px;font-size:12px}
.btn.cam-on{border-color:var(--acc);color:var(--acc)}
@media (max-width:640px){
  .cam-reticle{top:30%;bottom:30%}
}