:root{
  --bg:#f5f7f7; --card:#fff; --ink:#14201f; --muted:#66767a; --line:#dde5e6;
  --brand:#0f766e; --brand-d:#0b5a54; --brand-l:#e3f4f2; --red:#c62828; --red-l:#fdecec; --amber:#b45309;
  --r:12px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali",sans-serif;-webkit-text-size-adjust:100%}
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:#fff;min-height:42px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px;border-color:var(--brand)}
textarea{min-height:80px;resize:vertical}
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}
h2{margin:0 0 12px;font-size:19px}
h3{margin:0 0 8px;font-size:15px}
.hidden{display:none!important}
.center{display:flex;align-items:center;justify-content:center;min-height:100vh;color:var(--muted)}
.muted{color:var(--muted)} .small{font-size:12.5px} .right{text-align:right} .red{color:var(--red)} .green{color:var(--brand)} .bold{font-weight:600}

/* buttons */
.btn{border:1px solid var(--line);background:#fff;padding:9px 14px;border-radius:10px;cursor:pointer;min-height:42px;white-space:nowrap}
.btn:hover{background:#f0f4f4}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--brand-d)}
.btn.danger{color:var(--red);border-color:#efc4c4}
.btn.big{min-height:52px;font-size:17px;width:100%}
.btn.sm{min-height:34px;padding:5px 10px;font-size:13px}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* layout */
.page{padding:12px;max-width:1280px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;margin-bottom:12px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.row>.grow{flex:1;min-width:120px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}

/* login */
.login{max-width:380px;margin:12vh auto;padding:0 16px}
.login .card{padding:22px}
.login h1{margin:0 0 4px;font-size:24px;color:var(--brand)}

/* POS */
#q{font-size:18px;min-height:52px;border-width:2px}
.results{margin-top:10px;display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.item{display:flex;flex-direction:column;gap:2px;text-align:left;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;cursor:pointer}
.item:hover{border-color:var(--brand);background:var(--brand-l)}
.item .t{font-weight:600}
.item .s{font-size:12.5px;color:var(--muted)}
.item .p{font-weight:700;color:var(--brand)}
.item.out{opacity:.55}
.line{display:grid;grid-template-columns:1fr auto;gap:6px 10px;padding:10px 0;border-bottom:1px solid var(--line)}
.line .nm{font-weight:600}
.qty{display:flex;align-items:center;gap:4px}
.qty button{width:34px;height:34px;border-radius:8px;border:1px solid var(--line);background:#fff;font-size:18px;cursor:pointer}
.qty input{width:52px;text-align:center;padding:4px;min-height:34px}
.priceinp{width:90px;min-height:34px;padding:4px 8px}
.totals>div{display:flex;justify-content:space-between;padding:4px 0}
.totals .grand{font-size:24px;font-weight:800;border-top:2px solid var(--ink);margin-top:6px;padding-top:8px}
.payrow{display:grid;grid-template-columns:1fr 130px 38px;gap:6px;margin-bottom:6px}
.badge{display:inline-block;padding:2px 8px;border-radius:99px;font-size:12px;background:var(--brand-l);color:var(--brand);font-weight:600}
.badge.red{background:var(--red-l);color:var(--red)}
.badge.gray{background:#eceff0;color:var(--muted)}
.note{padding:8px 10px;border-radius:9px;background:var(--brand-l);font-size:13px;margin-top:8px}
.note.warn{background:var(--red-l);color:var(--red)}

/* tables / lists */
.tbl{width:100%;border-collapse:collapse}
.tbl th{font-size:12px;text-align:left;color:var(--muted);padding:8px 6px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:9px 6px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr.click{cursor:pointer}.tbl tr.click:hover{background:#f3f8f8}
.tblwrap{overflow-x:auto}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:12px}
.stat .v{font-size:20px;font-weight:800}
.stat .l{font-size:12.5px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:12px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;border-radius:99px;padding:6px 12px;cursor:pointer;font-size:13px}
.chip:hover{background:var(--brand-l)}

/* modal + toast */
.modal{position:fixed;inset:0;background:rgba(10,20,20,.5);display:flex;align-items:flex-end;justify-content:center;z-index:50;padding:0}
@media(min-width:700px){.modal{align-items:center;padding:20px}}
.sheet{background:#fff;width:100%;max-width:640px;max-height:92vh;overflow:auto;border-radius:16px 16px 0 0;padding:16px}
@media(min-width:700px){.sheet{border-radius:16px}}
.sheet.wide{max-width:860px}
.sheet .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:18px;z-index:99;display:flex;flex-direction:column;gap:6px;align-items:center;pointer-events:none}
.toast{background:#14201f;color:#fff;padding:10px 16px;border-radius:10px;max-width:92vw;box-shadow:0 4px 18px rgba(0,0,0,.25)}
.toast.err{background:var(--red)}
.switch{display:flex;justify-content:space-between;align-items:center;padding:9px 0;border-bottom:1px solid var(--line)}
.switch input{width:22px;height:22px;min-height:0}
.logoprev{max-height:70px;max-width:200px;border:1px dashed var(--line);padding:4px;border-radius:8px;background:#fff}
.vrow{display:grid;grid-template-columns:1fr 1fr 1.4fr 70px 38px;gap:6px;margin-bottom:6px}
@media(max-width:560px){.vrow{grid-template-columns:1fr 1fr;}.grid3{grid-template-columns:1fr}.grid2{grid-template-columns:1fr}}

/* ================= app shell: side menu (computer) + bottom bar (phone) ================= */
#app{min-height:100vh}
#main{min-width:0}
.topbar{display:flex;align-items:center;gap:10px;padding:8px 14px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;min-height:56px}
.topbar .ttl{flex:1;min-width:0}
.topbar .shop{font-size:11.5px;color:var(--muted);line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar h1{margin:0;font-size:19px;line-height:1.2}
.avatar{width:38px;height:38px;border-radius:50%;border:0;background:var(--brand);color:#fff;font-weight:700;font-size:16px;cursor:pointer}
.ico{flex:none;display:block}
#side{display:none}
#bottom{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.bn{flex:1;border:0;background:none;padding:8px 2px 7px;display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--muted);font-size:11px;font-weight:600;cursor:pointer;min-width:0}
.bn span{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bn.on{color:var(--brand)}
.bn.on .ico{stroke-width:2.4}
#page{padding-bottom:84px}
#toast{bottom:86px}

/* "More" sheet */
.grp2{margin:14px 0 6px;font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.6px}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.tile{border:1px solid var(--line);background:#fff;border-radius:12px;padding:14px 4px 10px;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:13px;font-weight:600;cursor:pointer;color:var(--ink)}
.tile .ico{color:var(--brand)}
.tile.on{background:var(--brand-l);border-color:var(--brand)}

/* POS on a phone: search, bill, customer, payment, then a fixed total bar */
.pos{display:flex;flex-direction:column;gap:0}
.pos-left,.pos-right{display:contents}
.c-search{order:1}.c-bill{order:2}.c-cust{order:3}.c-pay{order:4}
.c-cust{padding:0}
.c-cust>summary{list-style:none;padding:13px 14px;cursor:pointer;display:flex;gap:8px;align-items:center;justify-content:space-between}
.c-cust>summary::-webkit-details-marker{display:none}
.c-cust>summary::after{content:"▾";color:var(--muted)}
.c-cust[open]>summary::after{content:"▴"}
.c-cust>.grid3,.c-cust>#cnote{padding:0 14px 14px}
.cbar{position:fixed;left:0;right:0;bottom:calc(58px + env(safe-area-inset-bottom));z-index:25;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 14px rgba(0,0,0,.08);padding:10px 14px}
.cbar .btn{min-height:46px;padding:8px 22px;font-size:16px}
.pos.has-cbar{padding-bottom:70px}
.hm{display:none}

/* compact numbers on a phone */
@media(max-width:699px){
  .stat{padding:10px}.stat .v{font-size:17px}.stat .l{font-size:12px}
  .stats{grid-template-columns:repeat(2,1fr);gap:8px}
  .card{padding:12px;border-radius:12px}
  .page{padding:10px}
  .tbl td,.tbl th{padding:8px 4px}
}
@media(min-width:700px){.hm{display:table-cell}}

/* computer: left menu, content on the right, no bottom bars */
@media(min-width:900px){
  #app{display:grid;grid-template-columns:230px minmax(0,1fr)}
  #side{display:flex;flex-direction:column;position:sticky;top:0;height:100vh;background:#0b5a54;color:#fff;padding:14px 10px;overflow-y:auto}
  #side .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;padding:6px 10px 14px}
  #side .sidelist{flex:1}
  #side .grp{font-size:11px;letter-spacing:.8px;text-transform:uppercase;color:rgba(255,255,255,.55);padding:14px 10px 4px}
  #side .nv{width:100%;display:flex;align-items:center;gap:10px;border:0;background:none;color:rgba(255,255,255,.88);padding:10px 12px;border-radius:10px;cursor:pointer;font-size:14.5px;font-weight:600;text-align:left}
  #side .nv:hover{background:rgba(255,255,255,.1)}
  #side .nv.on{background:rgba(255,255,255,.18);color:#fff}
  #side .sidefoot{border-top:1px solid rgba(255,255,255,.18);padding-top:8px}
  #bottom,.cbar{display:none}
  #page{padding-bottom:20px}
  #toast{bottom:20px}
  .topbar{padding:10px 20px}
  .page{padding:16px 20px}
  .pos{display:grid;grid-template-columns:1.1fr 1fr;gap:12px;align-items:start}
  .pos-left,.pos-right{display:block}
  .c-search,.c-bill,.c-cust,.c-pay{order:0}
  .pos-right{position:sticky;top:76px}
  .pos.has-cbar{padding-bottom:0}
}
@media(max-width:899px){body:has(.cbar) #toast{bottom:170px}}

/* toolbar (filters + downloads) */
.tb-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;align-items:end}
.tb-row+.tb-row{margin-top:12px}
.tb .f{min-width:0}.tb .f.full{grid-column:1/-1}
.tb .f label{display:block;margin:0 0 4px;font-size:12px;font-weight:600;color:var(--muted)}
.tb select,.tb input{width:100%}
.tb-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.tb-actions .small{margin-right:auto}
@media(min-width:900px){.tb-row{grid-template-columns:minmax(200px,1.4fr) repeat(3,minmax(140px,1fr))}.tb .f.full{grid-column:auto}}
@media(max-width:560px){.tb-actions .btn{flex:1}.tb-actions .small{flex-basis:100%}}

.tb-row{align-items:start}
.tb-sub{display:contents}
.tb-sub[style*="none"]{display:none!important}

/* section headings: keep parts of a page clearly separate */
.sec{display:flex;align-items:center;gap:10px;margin:22px 0 10px;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.sec::after{content:"";flex:1;height:1px;background:var(--line)}
.page>.sec:first-child{margin-top:4px}
.page .card+.card{margin-top:14px}
.page .card h3{margin:0 0 10px}
@media(min-width:900px){.page[style*="max-width"]{margin-left:0}}
.page .grid2>.card,.page .grid3>.card{margin-top:0}

.changebox{display:flex;justify-content:space-between;align-items:center;margin:8px 0;padding:10px 12px;border-radius:10px;background:#e6f6ee;color:#0b6b3a;font-size:17px}
.changebox b{font-size:22px}

/* tidy button groups */
.tabbar{display:flex;gap:4px;overflow-x:auto;white-space:nowrap;border-bottom:1px solid var(--line);margin:0 0 14px;padding:0 2px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.tabbar::-webkit-scrollbar{display:none}
.tabbar button{flex:none;border:0;background:none;padding:10px 12px;font-size:14px;color:var(--muted,#667);border-bottom:3px solid transparent;cursor:pointer;margin-bottom:-1px}
.tabbar button.on{color:var(--brand);font-weight:700;border-bottom-color:var(--brand)}
.tgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.tgrid .btn,.tgrid .qa{width:100%;justify-content:center;text-align:center}
.tgrid .full{grid-column:1/-1}
.qa{border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 8px;font-size:14px;cursor:pointer;min-height:46px}
.qa:hover{background:var(--brand-l)}
.qa.in{border-color:#bfe3d0;background:#f1faf5}
.qa.out{border-color:#f0cfcf;background:#fdf4f4}
.qlbl{font-size:12px;color:var(--muted,#667);margin:12px 0 6px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.qlbl:first-child{margin-top:0}
@media(min-width:700px){.tgrid{grid-template-columns:repeat(4,1fr)}.tgrid .full{grid-column:auto}}
.tgrid.t3{grid-template-columns:repeat(3,1fr)}.tgrid.t3 .qa{font-size:13px;padding:10px 4px;line-height:1.2}

.chipbar{display:flex;gap:8px;overflow-x:auto;white-space:nowrap;padding:2px 0 6px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.chipbar::-webkit-scrollbar{display:none}
.chipbar .chip{flex:none;padding:8px 14px}
.chipbar .chip.on{background:var(--brand-l);border-color:var(--brand);color:var(--brand);font-weight:700}
.rgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}
.rgrid label{display:block;margin:0 0 4px;font-size:13px;color:var(--muted,#667)}
.rgrid input{width:100%}
label.row{display:flex;align-items:center;gap:10px;color:inherit;font-size:inherit}
label.row{flex-wrap:nowrap}label.row>input[type=checkbox]{flex:none;width:20px;min-width:20px}