:root{--bg:#f3f6f8;--card:#fff;--ink:#14262f;--mu:#5d7280;--line:#dbe3e8;--ac:#0e7c86;--ac2:#0a5f67;--acs:#dff1f3;--ok:#1d7a46;--oks:#e0f4e8;--bad:#b3261e;--bads:#fbe4e2;--warn:#8a5300;--warns:#fdecc8;--sh:0 1px 2px rgba(10,30,40,.06),0 4px 14px rgba(10,30,40,.05);--r:10px;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#0e1a21;--card:#16252e;--ink:#e6eef2;--mu:#93a6b2;--line:#2a3d49;--ac:#3fb8c3;--ac2:#6ad0d9;--acs:#143d45;--ok:#6fd39a;--oks:#14382a;--bad:#ff8a80;--bads:#4a2220;--warn:#f2b552;--warns:#4a3512;--sh:0 1px 2px rgba(0,0,0,.4);color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font:14px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-text-size-adjust:100%}
h1,h2,h3{margin:0}
a{color:var(--ac)}
.muted{color:var(--mu)}.r{text-align:right}.c{text-align:center}.b{font-weight:700}.nw{white-space:nowrap}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.grow{flex:1}.sp{flex:1}
.inp{padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);font:inherit;min-width:0}
.inp:focus,.btn:focus-visible,button:focus-visible{outline:2px solid var(--ac);outline-offset:1px}
textarea.inp{width:100%;resize:vertical}
label.f{display:block;font-size:12px;color:var(--mu);font-weight:600}
label.f .inp{display:block;width:100%;margin-top:3px;font-weight:400;color:var(--ink);font-size:14px}
.fg{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.fg .full{grid-column:1/-1}
.btn{display:inline-flex;align-items:center;gap:6px;justify-content:center;background:var(--ac);color:#fff;border:1px solid var(--ac);border-radius:8px;padding:8px 14px;font:inherit;font-weight:600;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--ac2)}
@media (prefers-color-scheme:dark){.btn{color:#062a30}}
.btn.sec{background:transparent;color:var(--ink);border-color:var(--line)}.btn.sec:hover{background:var(--bg)}
.btn.danger{background:var(--bad);border-color:var(--bad);color:#fff}
.btn.ghost{background:transparent;border-color:transparent;color:var(--ac)}
.btn.sm{padding:4px 9px;font-size:12px}.btn.lg{padding:12px 18px;font-size:16px}
.btn:disabled{opacity:.5;cursor:default}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;box-shadow:var(--sh);margin-bottom:12px}
.card>h3{font-size:14px;margin-bottom:10px}
.badge{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;font-weight:600;white-space:nowrap;background:var(--bg);color:var(--mu)}
.badge.ok{background:var(--oks);color:var(--ok)}.badge.bad{background:var(--bads);color:var(--bad)}.badge.warn{background:var(--warns);color:var(--warn)}.badge.ac{background:var(--acs);color:var(--ac)}
.wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{padding:8px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{font-size:12px;color:var(--mu);font-weight:600;white-space:nowrap;position:sticky;top:0;background:var(--card)}
.tbl tr.click{cursor:pointer}.tbl tr.click:hover td{background:var(--bg)}
.tbl small,.sm{font-size:12px;color:var(--mu)}
.empty{padding:22px;text-align:center;color:var(--mu)}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;margin-bottom:12px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px;box-shadow:var(--sh)}
.kpi small{display:block;color:var(--mu)}.kpi b{font-size:20px}.kpi.good b{color:var(--ok)}.kpi.bad b{color:var(--bad)}
.tabs{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:10px}
.tab{padding:6px 12px;border-radius:99px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer;font:inherit;font-size:13px}
.tab.on{background:var(--ac);color:#fff;border-color:var(--ac)}
@media (prefers-color-scheme:dark){.tab.on{color:#062a30}}
.phead{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.phead h2{font-size:20px;flex:0 0 auto}.phead .sp{flex:1}

/* ===== Khung app ===== */
#app{display:grid;grid-template-columns:224px 1fr;min-height:100vh}
#side{background:var(--card);border-right:1px solid var(--line);padding:12px 10px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{font-weight:800;font-size:16px;padding:6px 10px 14px;color:var(--ac)}
.nav a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:500}
.nav a:hover{background:var(--bg)}.nav a.on{background:var(--acs);color:var(--ac);font-weight:700}
.ico{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto}
#mainc{min-width:0;display:flex;flex-direction:column}
#top{display:flex;align-items:center;gap:10px;padding:8px 16px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
#top .ttl{font-weight:700;font-size:15px}
#view{padding:16px;max-width:1500px;width:100%}
.sync{font-size:12px;padding:2px 8px;border-radius:99px;background:var(--oks);color:var(--ok);white-space:nowrap}
.sync.off{background:var(--warns);color:var(--warn)}.sync.loc{background:var(--acs);color:var(--ac)}
#bnav{display:none}
@media (max-width:860px){
 #app{grid-template-columns:1fr}
 #side{display:none}
 #view{padding:10px 10px 84px}
 #bnav{display:flex;position:fixed;left:0;right:0;bottom:0;background:var(--card);border-top:1px solid var(--line);z-index:25;padding-bottom:env(safe-area-inset-bottom,0)}
 #bnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 2px;font-size:11px;color:var(--mu);text-decoration:none;cursor:pointer}
 #bnav a.on{color:var(--ac);font-weight:700}
 .hide-m{display:none!important}
}
#toasts{position:fixed;left:50%;transform:translateX(-50%);bottom:84px;z-index:90;display:flex;flex-direction:column;gap:6px;align-items:center;max-width:94%}
.toast{background:var(--ink);color:var(--bg);padding:9px 14px;border-radius:8px;box-shadow:var(--sh);text-align:center}.toast.err{background:var(--bad);color:#fff}
.ovl{position:fixed;inset:0;background:rgba(5,15,20,.55);z-index:60;display:flex;align-items:flex-start;justify-content:center;padding:4vh 10px;overflow:auto}
.mdl{background:var(--card);color:var(--ink);border-radius:12px;width:100%;max-width:620px;box-shadow:0 10px 40px rgba(0,0,0,.35);display:flex;flex-direction:column;max-height:92vh}
.mdl.sm{max-width:420px}.mdl.lg{max-width:900px}.mdl.xl{max-width:1100px}.mdl.scan{max-width:520px}
.mh{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line);font-size:16px}
.mh .x{background:none;border:0;font-size:24px;line-height:1;color:var(--mu);cursor:pointer}
.mb{padding:14px 16px;overflow:auto;flex:1}
.mf{padding:10px 16px;border-top:1px solid var(--line);display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.scanbox{position:relative;background:#000;border-radius:10px;overflow:hidden;aspect-ratio:4/3}
.scanbox video{width:100%;height:100%;object-fit:cover}
.scanline{position:absolute;left:8%;right:8%;top:50%;height:2px;background:rgba(255,60,60,.85);box-shadow:0 0 8px rgba(255,60,60,.9)}
.dd{position:absolute;z-index:30;left:0;right:0;top:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;box-shadow:var(--sh);max-height:340px;overflow:auto}
.dd .it{padding:8px 10px;border-bottom:1px solid var(--line);cursor:pointer;display:flex;justify-content:space-between;gap:8px}
.dd .it:hover,.dd .it.hl{background:var(--acs)}

/* ===== Đăng nhập ===== */
#login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
#login .card{max-width:380px;width:100%}
#login h1{font-size:22px;color:var(--ac);margin-bottom:4px}

/* ===== Bán hàng ===== */
.pos{display:grid;grid-template-columns:minmax(0,1fr) 430px;grid-template-areas:"s c" "g c";grid-template-rows:auto 1fr;gap:12px;align-items:start}
.pos-s{grid-area:s;position:relative}.pos-g{grid-area:g}.pos-c{grid-area:c}
@media (max-width:1100px){.pos{grid-template-columns:1fr;grid-template-areas:"s" "c" "g"}}
.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{background:var(--bg2,#eef2f3);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:13px}.chip a{cursor:pointer;color:var(--bad);margin-left:4px;font-weight:700}
.dd-it:hover{background:rgba(14,124,134,.08)}
.posl{position:relative}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:9px;cursor:pointer;text-align:left;font:inherit;color:inherit;display:flex;flex-direction:column;gap:3px;min-height:84px}
.pcard:hover{border-color:var(--ac)}.pcard .n{font-weight:600;line-height:1.25}.pcard .p{color:var(--ac);font-weight:700;margin-top:auto}
.pcard.out{opacity:.5}
.ctabs{display:flex;gap:6px;overflow:auto;margin-bottom:8px}
.ctab{display:flex;align-items:center;gap:6px;padding:6px 10px;border:1px solid var(--line);border-radius:8px 8px 0 0;background:var(--card);cursor:pointer;white-space:nowrap}
.ctab.on{background:var(--ac);color:#fff;border-color:var(--ac)}
@media (prefers-color-scheme:dark){.ctab.on{color:#062a30}}
.cart .ln{display:grid;grid-template-columns:1fr auto;gap:2px 8px;padding:8px 0;border-bottom:1px solid var(--line)}
.cart .ln .t{font-weight:600}.cart .ln input.q{width:56px;text-align:center}.cart .ln input.pr{width:110px;text-align:right}
.sumrow{display:flex;justify-content:space-between;padding:3px 0}.sumrow.big{font-size:18px;font-weight:800;color:var(--ac)}
.paybar{position:sticky;bottom:0;background:var(--card);padding-top:8px}

/* ===== Biểu đồ ===== */
.bars{display:flex;align-items:flex-end;gap:6px;height:150px;padding-top:8px}
.bars .col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;min-width:0}
.bars .bar{width:100%;background:var(--ac);border-radius:4px 4px 0 0;min-height:2px}
.bars small{font-size:10px;color:var(--mu);margin-top:3px;white-space:nowrap}

/* ===== In ấn ===== */
#pa{display:none}
.pvwrap{background:#8a98a0;padding:12px;border-radius:8px;overflow:auto;max-height:62vh;display:flex;justify-content:center}
.pv{background:#fff;color:#000;box-shadow:0 2px 10px rgba(0,0,0,.3);height:fit-content}
.pv.k80{width:74mm;padding:3mm}.pv.a4{width:210mm;padding:12mm;zoom:.62}.pv.lab{padding:2mm;background:#ddd}
.doc,.doc *{color:#000}.doc{font-family:Arial,Helvetica,sans-serif;font-size:9pt;line-height:1.3;background:#fff}
.doc .big{font-size:12pt}.doc .c{text-align:center}.doc .r{text-align:right}.doc .mt{margin-top:6px}.doc .sm{font-size:7.5pt;color:#333}
.doc hr{border:0;border-top:1px dashed #666;margin:5px 0}
.doc .it{padding:2px 0}.doc .it .n{font-weight:700}
.doc .tt{display:flex;justify-content:space-between;gap:6px}.doc .tt.b{font-weight:700;font-size:10.5pt}
.doc svg{display:block;width:100%}
.doc.a4{font-size:11pt}.doc.a4 h1{text-align:center;font-size:18pt;margin:8px 0}
.doc.a4 table{width:100%;border-collapse:collapse;margin:8px 0}.doc.a4 th,.doc.a4 td{border:1px solid #444;padding:4px 6px;text-align:left}.doc.a4 .r{text-align:right}
.doc.a4 .tots{margin-left:50%}.doc .sig{display:flex;justify-content:space-around;margin-top:22px}
.doc.a4 .meta{margin:6px 0}
.doc .lrow{display:flex;break-after:page;overflow:hidden}.doc .lrow:last-child{break-after:auto}
.doc.labels .lrow{margin-bottom:2mm;outline:1px dotted #999}
.lb{box-sizing:border-box;padding:1.2mm 1.5mm;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;line-height:1.1;background:#fff}
.lb .ln{font-size:8.5pt;font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lb .lc{font-size:7pt}.lb .lp{font-size:12pt;font-weight:700}
@media print{
 html,body{background:#fff!important;color:#000!important;height:auto}
 body>*:not(#pa){display:none!important}
 #pa{display:block!important;background:#fff}
 .doc.labels .lrow{margin-bottom:0;outline:0}
}

/* Mobile: không cho trang tràn ngang */
html,body{max-width:100%;overflow-x:hidden}
#app{grid-template-columns:minmax(0,224px) minmax(0,1fr)}
@media (max-width:860px){
  #app{grid-template-columns:minmax(0,1fr)}
  #top{padding:8px 10px;gap:6px;min-width:0}
  #top .ttl{flex:0 1 auto;min-width:0;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #ubtn{max-width:44vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:0 1 auto}
  #syncb{flex:0 0 auto;font-size:11px;white-space:nowrap}
  #view{min-width:0;overflow-x:hidden}
  .card,.kpis,.pos,.row{min-width:0}
  img,svg,canvas,video{max-width:100%}
}
@media (max-width:860px){
  html,body,#app,#mainc{width:100%;max-width:100vw}
  .kpis{grid-template-columns:repeat(2,minmax(0,1fr))}
  .kpi{min-width:0;overflow:hidden}
  .kpi b{overflow-wrap:anywhere}
  .fg{grid-template-columns:minmax(0,1fr)}
  .tbl{font-size:13px}
  .wrap{max-width:100%;overflow-x:auto}
}
@media (max-width:860px){ input,select,textarea,.inp{font-size:16px!important} }

/* Tem: căn giữa tên máy, tình trạng, giá, mã vạch */
.lb{align-items:center;text-align:center}
.lb .ln{width:100%;text-align:center;font-size:9.5pt;-webkit-box-pack:center}
.lb .lc,.lb .lp{width:100%;text-align:center}
.lb .bc{display:block;margin:0 auto;max-width:100%}

/* Bán hàng kiểu KiotViet trên điện thoại: danh sách hàng + thanh khách/giá + nút Bán hàng nổi */
.mbar,.pfab,.cback{display:none}
.pcard .pi{display:none}
.pcard .pm{display:flex;flex-direction:column;gap:4px;min-width:0}
.pcard .mt{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.pcard .sku{font-weight:600;color:var(--ink);font-size:13px}
.pcard .chip{background:var(--bg);border-radius:6px;padding:2px 8px;color:var(--mu);font-size:12px}
.pcard .inc{background:var(--ac);color:#fff;border-radius:10px;padding:2px 8px;font-size:12px;font-weight:700}
@media (prefers-color-scheme:dark){.pcard .inc{color:#062a30}}
@media (max-width:860px){
 .pos{display:block}
 .pos.v-list .pos-c{display:none}
 .pos.v-cart .pos-s,.pos.v-cart .pos-g,.pos.v-cart .pfab{display:none}
 .pos.v-list{padding-bottom:64px}
 .cback{display:block;margin-bottom:8px}
 .mbar{display:flex;gap:8px;align-items:center;margin-top:8px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px 10px}
 .mbar .cb{flex:1;min-width:0;background:none;border:0;font:inherit;color:inherit;font-weight:600;font-size:16px;text-align:left;padding:8px 0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;cursor:pointer}
 .mbar select{border:0;background:none;font-weight:600;width:auto;max-width:42%}
 .pgrid{grid-template-columns:1fr;gap:0;background:var(--card);border-radius:12px;overflow:hidden;border:1px solid var(--line)}
 .pcard{flex-direction:row;align-items:center;gap:12px;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:12px;min-height:0;width:100%}
 .pcard .pi{display:block;flex:0 0 52px;height:52px;border-radius:12px;background:#e8effc url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 52 52'%3E%3Ccircle cx='19' cy='17' r='5' fill='%235b8def'/%3E%3Cpath d='M7 40l13-14 8 9 7-8 10 13z' fill='%235b8def'/%3E%3C/svg%3E") center/70% no-repeat}
 .pcard .pm{flex:1}
 .pcard .n{font-size:16px;font-weight:600}
 .pcard .p{margin-top:0;font-size:17px;white-space:nowrap;align-self:flex-end;color:#2563eb}
 .pfab{display:flex;position:fixed;left:50%;transform:translateX(-50%);width:min(94vw,520px);bottom:calc(60px + env(safe-area-inset-bottom,0px));z-index:24}
 .pfab .btn{width:100%;border-radius:26px;padding:14px 18px;font-size:17px;font-weight:700;box-shadow:0 4px 14px rgba(0,0,0,.25)}
}
@media (max-width:860px){ #toasts{bottom:138px} }
@media (max-width:860px){ #pst{flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch} #pst .tab{flex:0 0 auto} }
/* Nút to, chữ rõ trong hộp chọn khách */
.btn.bigb{font-size:15px;padding:10px 16px}
.btn.newc{background:#0f766e;border-color:#0f766e;color:#fff!important;font-weight:700}
.btn.newc:hover{background:#115e59}
/* Nút chính luôn nền xanh đậm + chữ trắng (đọc rõ ở cả chế độ sáng và tối) */
.btn:not(.sec):not(.ghost):not(.danger){background:#0f766e;border-color:#0f766e;color:#fff}
.btn:not(.sec):not(.ghost):not(.danger):hover{background:#115e59}
.tab.on,.ctab.on,.pcard .inc{background:#0f766e;border-color:#0f766e;color:#fff}
.btn.danger{background:#b3261e;border-color:#b3261e;color:#fff}
.btn.danger:hover{background:#8c1d18}
.toast.err{background:#b3261e;color:#fff}