:root{
  --bg:#f4f5f7;--card:#fff;--text:#1d2330;--muted:#6b7280;--line:#e5e7eb;
  --pri:#2563eb;--pri-ink:#fff;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--soft:#eef2ff;
  --radius:14px;--shadow:0 1px 3px rgba(0,0,0,.08);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0f1218;--card:#181c25;--text:#e8eaf0;--muted:#9aa3b2;--line:#2a303c;
  --pri:#4f8cff;--soft:#1e2740;--shadow:none;
}}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);
  font-family:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15px;line-height:1.45}
a{color:var(--pri)}
button,input,select,textarea{font:inherit;color:inherit}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);min-height:42px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--pri);outline-offset:-1px}
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 14px;min-height:42px;border-radius:10px;
  border:1px solid var(--line);background:var(--card);cursor:pointer;font-weight:500;white-space:nowrap}
.btn.pri{background:var(--pri);border-color:var(--pri);color:var(--pri-ink)}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.bad{background:var(--bad);border-color:var(--bad);color:#fff}
.btn.ghost{background:transparent;border-color:transparent}
.btn.sm{padding:6px 10px;min-height:34px;font-size:14px}
.btn.block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:8px;align-items:center}
.row>*{flex:1}
.row>.auto{flex:0 0 auto}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 10px}
.muted{color:var(--muted)}
.small{font-size:13px}
.right{text-align:right}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.3px}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-bottom:12px;border:1px solid var(--line)}
.hidden{display:none!important}
.badge{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;background:var(--soft);color:var(--pri)}
.badge.bad{background:#fee2e2;color:#b91c1c}.badge.ok{background:#dcfce7;color:#15803d}.badge.warn{background:#fef3c7;color:#b45309}
.low{color:var(--bad);font-weight:600}

/* app shell */
header.top{position:sticky;top:0;z-index:20;background:var(--card);border-bottom:1px solid var(--line);
  padding:10px 16px;display:flex;align-items:center;gap:10px}
header.top h1{font-size:17px;margin:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.asbar{background:#fef3c7;color:#92400e;padding:6px 16px;font-size:13px}
main{max-width:760px;margin:0 auto;padding:12px 16px 96px}
nav.bottom{position:fixed;bottom:0;left:0;right:0;z-index:20;background:var(--card);border-top:1px solid var(--line);
  display:flex;padding-bottom:env(safe-area-inset-bottom)}
nav.bottom button{flex:1;border:0;background:none;padding:8px 2px 6px;display:flex;flex-direction:column;align-items:center;gap:2px;
  font-size:12px;color:var(--muted);cursor:pointer}
nav.bottom button .ico{font-size:21px;line-height:1}
nav.bottom button.on{color:var(--pri);font-weight:600}
.seg{display:flex;background:var(--line);border-radius:10px;padding:3px;gap:3px;margin-bottom:10px}
.seg button{flex:1;border:0;background:none;padding:8px 4px;border-radius:8px;cursor:pointer;font-weight:500;font-size:14px}
.seg button.on{background:var(--card);box-shadow:var(--shadow);color:var(--pri)}
.seg.sale button.on{color:var(--ok)}

/* scanner */
.scanbox{background:#000;border-radius:var(--radius);overflow:hidden;position:relative;margin-bottom:10px}
.scanbox .reader{width:100%;min-height:10px}
.scanbox .reader video{width:100%!important;display:block;object-fit:cover}
.scanbox .tools{position:absolute;right:8px;top:8px;display:flex;gap:6px;z-index:5}
.scanbox .tools button{background:rgba(0,0,0,.55);color:#fff;border:0;border-radius:99px;width:38px;height:38px;font-size:18px;cursor:pointer}
.scanbox .zoom{position:absolute;left:12px;right:12px;bottom:10px;z-index:5}
.scanbox .zoom input{min-height:0;padding:0;background:transparent;border:0}
.scanbox .flash{position:absolute;inset:0;border:4px solid var(--ok);border-radius:var(--radius);opacity:0;pointer-events:none;transition:opacity .3s;z-index:6}
.scanbox .flash.on{opacity:1;transition:none}
.scanbox .flash.err{border-color:var(--bad)}
.scanbox .status{position:absolute;left:0;right:0;top:0;z-index:4;padding:8px 54px 8px 12px;color:#fff;font-size:13px;
  background:linear-gradient(rgba(0,0,0,.55),transparent)}
.scanbar{display:flex;gap:8px;margin-bottom:12px}
.scanbar input{flex:1}
.notice{background:#fef3c7;color:#78350f;border-radius:10px;padding:10px 12px;font-size:13px;margin-bottom:10px}
@media (prefers-color-scheme:dark){.notice{background:#3b2f12;color:#fde68a}}
#html5-qrcode-anchor-scan-type-change,#reader__dashboard_section_csr span{display:none!important}

/* product list */
.chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px;margin-bottom:8px;scrollbar-width:none}
.chips button{flex:0 0 auto;border:1px solid var(--line);background:var(--card);border-radius:99px;padding:6px 12px;cursor:pointer;font-size:14px}
.chips button.on{background:var(--pri);border-color:var(--pri);color:#fff}
.group-h{display:flex;align-items:center;gap:8px;margin:16px 2px 6px;font-weight:600}
.group-h .muted{font-weight:400;font-size:13px}
.group-h span:first-child{flex:1}
.list{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);overflow:hidden}
.item{display:flex;gap:10px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.item:last-child{border-bottom:0}
.item:active{background:var(--soft)}
.item .main{flex:1;min-width:0}
.item .name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .qty{text-align:right;min-width:64px}
.item .qty b{font-size:17px}
.empty{text-align:center;color:var(--muted);padding:30px 10px}
.fab{position:fixed;right:18px;bottom:78px;z-index:15;width:56px;height:56px;border-radius:50%;border:0;background:var(--pri);color:#fff;
  font-size:28px;box-shadow:0 4px 14px rgba(37,99,235,.4);cursor:pointer}

/* scanned product card */
.pcard .pname{font-size:18px;font-weight:600}
.pcard .bigqty{font-size:34px;font-weight:700;line-height:1.1}
.pcard .stepper{display:flex;align-items:center;gap:6px}
.pcard .stepper input{text-align:center;font-size:18px;font-weight:600}
.pcard .stepper button{width:46px;flex:0 0 46px;font-size:20px}

/* cart */
.cart .line{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line)}
.cart .line:last-child{border-bottom:0}
.cart .line .main{flex:1;min-width:0}
.cart .line .q{display:flex;align-items:center;gap:4px}
.cart .line .q button{width:34px;height:34px;border-radius:8px;border:1px solid var(--line);background:var(--card);font-size:18px;cursor:pointer}
.cart .line .q span{min-width:28px;text-align:center;font-weight:600}
.cart .line .lt{min-width:70px;text-align:right;font-weight:600}
.totalbar{position:fixed;left:0;right:0;bottom:58px;z-index:16;background:var(--card);border-top:1px solid var(--line);padding:10px 16px calc(10px);
  display:flex;align-items:center;gap:12px;max-width:760px;margin:0 auto}
.totalbar .t{flex:1}
.totalbar .t b{font-size:24px;color:var(--ok)}
.suggest{position:relative}
.suggest .dd{position:absolute;left:0;right:0;top:100%;z-index:30;background:var(--card);border:1px solid var(--line);border-radius:10px;
  max-height:260px;overflow:auto;box-shadow:0 8px 20px rgba(0,0,0,.15)}
.suggest .dd div{padding:9px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.suggest .dd div:hover{background:var(--soft)}

/* modal */
.modal{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.45);display:flex;align-items:flex-end;justify-content:center}
.modal .sheet{background:var(--bg);width:100%;max-width:560px;max-height:94vh;overflow:auto;border-radius:18px 18px 0 0;padding:16px 16px calc(16px + env(safe-area-inset-bottom))}
@media (min-width:640px){.modal{align-items:center}.modal .sheet{border-radius:18px}}
.modal .sheet h2{margin:0 0 6px;font-size:19px;display:flex;align-items:center;gap:8px}
.modal .sheet h2 span{flex:1}
.modal .actions{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.modal .actions .btn{flex:1}
.bcprev{background:#fff;border-radius:10px;padding:6px;text-align:center;margin-top:6px}
.bcprev svg{max-width:100%;height:80px}
.bcinfo{font-size:12px;margin-top:4px}

/* toast */
#toast{position:fixed;left:50%;top:14px;transform:translateX(-50%);z-index:99;display:flex;flex-direction:column;gap:6px;width:min(92vw,420px)}
#toast div{background:#111827;color:#fff;padding:10px 14px;border-radius:10px;box-shadow:0 6px 18px rgba(0,0,0,.25);font-size:14px;animation:tin .2s}
#toast div.bad{background:var(--bad)}#toast div.ok{background:var(--ok)}
@keyframes tin{from{opacity:0;transform:translateY(-8px)}}

/* reports */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:12px}
@media (min-width:600px){.stats{grid-template-columns:repeat(3,1fr)}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px}
.stat .k{font-size:12px;color:var(--muted)}
.stat .v{font-size:21px;font-weight:700}
.stat .s{font-size:12px;color:var(--muted)}
.bars{display:flex;align-items:flex-end;gap:4px;height:120px;padding-top:8px}
.bars .b{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:10px;color:var(--muted)}
.bars .b i{display:block;width:100%;background:var(--pri);border-radius:4px 4px 0 0;min-height:2px}
table.t{width:100%;border-collapse:collapse;font-size:14px}
table.t th,table.t td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
table.t th{font-size:12px;color:var(--muted);font-weight:500}
table.t td.n,table.t th.n{text-align:right}
.tablewrap{overflow-x:auto}

/* receipt */
.receipt{background:#fff;color:#000;padding:14px;border-radius:10px;font-size:14px}
.receipt .c{text-align:center}
.receipt hr{border:0;border-top:1px dashed #999}
.receipt table{width:100%;border-collapse:collapse}
.receipt td{padding:2px 0}
@media print{
  body *{visibility:hidden}
  .printable,.printable *{visibility:visible}
  .printable{position:absolute;left:0;top:0;width:100%}
}

/* รูปสินค้า + OCR */
.thumb{width:44px;height:44px;flex:0 0 44px;border-radius:8px;object-fit:cover;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:20px}
.thumb.lg{width:72px;height:72px;flex:0 0 72px}
.photo{margin:4px 0 6px}
.photo img{display:block;width:100%;max-height:200px;object-fit:contain;background:#000;border-radius:10px;margin-bottom:8px}
.ocrchips{display:flex;flex-wrap:wrap;gap:4px}
.ocrchips span{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;max-width:100%}
.ocrchips .btn{border:0;border-radius:0;min-height:32px;white-space:normal;text-align:left}