:root{
  --brand:#0a8fc4;--brand-d:#0873a1;--purple:#5b00a8;--yellow:#ffb70f;--orange:#f58220;--red:#e5372a;--green:#1f9d5b;--navy:#2f4a6b;
  --bg:#f3f6fa;--card:#fff;--line:#e2e8f0;--text:#1c2733;--muted:#6b7a8c;--radius:10px;
  --rainbow:linear-gradient(90deg,#0a8fc4,#5b00a8 30%,#e5372a 55%,#ffb70f 78%,#1f9d5b);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font:14px/1.45 "Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--brand-d);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .5em;font-weight:600}
h1{font-size:22px}h2{font-size:19px}h3{font-size:16px}h4{font-size:14px}
code{background:#eef2f7;padding:1px 5px;border-radius:4px;font-size:12px}
.muted{color:var(--muted)}.right{text-align:right}.center{text-align:center}.nowrap{white-space:nowrap}
.mt{margin-top:14px}.mb{margin-bottom:14px}.hide{display:none!important}
.flex{display:flex;gap:10px;align-items:center}.flex.wrap{flex-wrap:wrap}.grow{flex:1}

/* shell */
.shell{display:flex;min-height:100vh}
.side{width:224px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto;flex-shrink:0}
.side .brand{padding:14px 14px 10px;border-bottom:1px solid var(--line)}
.side .brand img{width:100%;height:auto;display:block}
.side nav{padding:8px}
.side nav .grp{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:12px 10px 4px}
.side nav a{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;color:var(--text);font-weight:500}
.side nav a:hover{background:#eef5fb;text-decoration:none}
.side nav a.active{background:linear-gradient(90deg,var(--brand),var(--purple));color:#fff}
.side nav a .k{margin-left:auto;font-size:10px;opacity:.7;border:1px solid currentColor;border-radius:4px;padding:0 4px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.top{background:#fff;border-bottom:1px solid var(--line);padding:8px 18px;display:flex;align-items:center;gap:14px;position:sticky;top:0;z-index:20}
.top::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:var(--rainbow)}
.top .title{font-weight:600;font-size:16px}
.top .who{margin-left:auto;display:flex;gap:12px;align-items:center;font-size:13px}
.content{padding:18px;max-width:1500px;width:100%}
.burger{display:none;background:none;border:0;font-size:22px;cursor:pointer}
.offline-pill{background:var(--orange);color:#fff;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:600}
.online-pill{background:var(--green);color:#fff;padding:2px 10px;border-radius:99px;font-size:12px}

/* cards, grid */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}
.card h3{margin-bottom:10px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;border-left:4px solid var(--brand)}
.stat .l{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.stat .v{font-size:22px;font-weight:700;margin-top:2px}
.stat.g{border-left-color:var(--green)}.stat.o{border-left-color:var(--orange)}.stat.r{border-left-color:var(--red)}.stat.p{border-left-color:var(--purple)}.stat.y{border-left-color:var(--yellow)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 14px}
.form-grid.c3{grid-template-columns:repeat(3,1fr)}.form-grid.c4{grid-template-columns:repeat(4,1fr)}
.span2{grid-column:span 2}.span3{grid-column:span 3}.span4{grid-column:1/-1}

/* forms */
label{display:flex;flex-direction:column;gap:4px;font-weight:500;font-size:13px}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--text);width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid #9fd6ee;border-color:var(--brand)}
input[type=checkbox],input[type=radio]{width:auto}
label.chk{flex-direction:row;align-items:center;gap:8px;font-weight:500}
textarea{min-height:70px;resize:vertical}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid #cbd5e1;background:#fff;color:var(--text);font:inherit;font-weight:500;cursor:pointer;white-space:nowrap}
.btn:hover{background:#f1f5f9;text-decoration:none}
.btn.primary{background:linear-gradient(90deg,var(--brand),var(--purple));color:#fff;border-color:transparent}
.btn.primary:hover{filter:brightness(1.08)}
.btn.green{background:var(--green);color:#fff;border-color:transparent}
.btn.danger{background:var(--red);color:#fff;border-color:transparent}
.btn.warn{background:var(--yellow);border-color:transparent}
.btn.sm{padding:4px 9px;font-size:12px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.hint{font-size:11px;color:var(--muted)}

/* tables */
.tbl-wrap{overflow-x:auto}
table.t{width:100%;border-collapse:collapse;background:#fff}
table.t th{background:#f0f4f9;text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:#475569;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
table.t td{padding:7px 10px;border-bottom:1px solid #eef1f5;vertical-align:middle}
table.t tr:hover td{background:#fafcff}
table.t td.num,table.t th.num{text-align:right;font-variant-numeric:tabular-nums}
table.t tfoot td{font-weight:700;background:#f8fafc}
.badge{display:inline-block;padding:1px 8px;border-radius:99px;font-size:11px;font-weight:600;background:#e2e8f0;color:#334155}
.badge.green{background:#d9f5e6;color:#0d6b3a}.badge.red{background:#fde1de;color:#a3241b}.badge.yellow{background:#fff1cc;color:#8a5b00}.badge.blue{background:#dbeefa;color:#075985}.badge.purple{background:#ecdcfa;color:#5b00a8}.badge.gray{background:#e5e7eb;color:#4b5563}

.alert{padding:10px 14px;border-radius:8px;margin-bottom:12px;border:1px solid}
.alert.ok{background:#e6f7ee;border-color:#b6e5cb;color:#0d5c33}
.alert.err{background:#fdecea;border-color:#f5c2bd;color:#8f1d14}
.alert.warn{background:#fff6e0;border-color:#f6dc9b;color:#7a5200}
.alert.info{background:#e6f3fb;border-color:#b7dcf1;color:#075985}
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--line);margin-bottom:14px;flex-wrap:wrap}
.tabs a{padding:8px 14px;border-radius:8px 8px 0 0;color:var(--muted);font-weight:500}
.tabs a.on{color:var(--brand-d);border-bottom:3px solid var(--brand);margin-bottom:-2px;background:#fff}
.pager{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.pager a,.pager span{padding:4px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
.pager span{background:var(--brand);color:#fff;border-color:var(--brand)}
.bars{display:flex;align-items:flex-end;gap:10px;height:150px;padding:6px 0}
.bars .b{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:11px;color:var(--muted)}
.bars .b i{display:block;width:100%;background:linear-gradient(180deg,var(--brand),var(--purple));border-radius:6px 6px 0 0;min-height:2px}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;align-items:center;justify-content:center;z-index:100;padding:14px}
.modal-bg.open{display:flex}
.modal{background:#fff;border-radius:12px;max-width:640px;width:100%;max-height:90vh;overflow:auto;padding:18px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.modal h3{margin-bottom:12px}

/* auth */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 20% 10%,#dff3fb,transparent 40%),radial-gradient(circle at 90% 90%,#efe0fb,transparent 40%),#f6f8fb;padding:16px}
.auth-card{background:#fff;border-radius:16px;padding:28px;width:100%;max-width:420px;box-shadow:0 10px 40px rgba(20,40,80,.12);border-top:5px solid transparent;border-image:var(--rainbow) 1}
.auth-logo{display:block;width:230px;margin:0 auto 14px}
.auth-card form{display:flex;flex-direction:column;gap:12px}
.auth-card form.form-grid{display:grid}

/* ---------- POS / billing ---------- */
.pos{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:14px}
.pos>div{min-width:0}
label .kbd{align-self:flex-start;margin-left:0}
.pos .panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px}
.pos-head{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:10px;align-items:end;margin-bottom:10px}
.search-box{position:relative}
.search-box input{font-size:17px;padding:11px 12px;border:2px solid var(--brand)}
.results{position:absolute;left:0;right:0;top:100%;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 12px 30px rgba(0,0,0,.18);z-index:30;max-height:380px;overflow:auto}
.results .r{display:grid;grid-template-columns:2.2fr 1.6fr .8fr .8fr;gap:8px;padding:7px 12px;cursor:pointer;border-bottom:1px solid #f1f5f9;align-items:center}
.results .r.sel,.results .r:hover{background:#e3f3fb}
.results .r.oos{opacity:.55}
.results .r small{color:var(--muted);display:block}
table.lines input{padding:4px 6px;border-radius:6px;text-align:right}
table.lines td{padding:5px 6px}
table.lines tr.cur td{background:#fff8e1}
.totals .row{display:flex;justify-content:space-between;padding:4px 0}
.totals .grand{font-size:26px;font-weight:800;color:var(--purple);border-top:2px solid var(--line);margin-top:6px;padding-top:8px}
.paymodes{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:8px 0}
.paymodes button{padding:9px 4px;border:2px solid var(--line);border-radius:8px;background:#fff;font-weight:600;cursor:pointer}
.paymodes button.on{border-color:var(--brand);background:#e3f3fb;color:var(--brand-d)}
.kbd{display:inline-block;font-size:10px;border:1px solid #94a3b8;border-radius:4px;padding:0 4px;margin-left:4px;background:#f8fafc;color:#475569;font-weight:600}
.btn.primary .kbd{background:rgba(255,255,255,.2);color:#fff;border-color:rgba(255,255,255,.6)}
.expiry-warn{color:var(--red);font-weight:600}.expiry-near{color:var(--orange);font-weight:600}
.qr-box{text-align:center;padding:8px}
.toast{position:fixed;bottom:18px;right:18px;background:#1c2733;color:#fff;padding:10px 16px;border-radius:8px;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.3)}
.toast.err{background:var(--red)}

/* ---------- invoice print ---------- */
.inv{background:#fff;margin:0 auto;color:#000;font-family:"Segoe UI",Arial,sans-serif}
.inv h2{margin:0}.inv table{width:100%;border-collapse:collapse}
.inv.a4{width:210mm;padding:10mm;font-size:12px}
.inv.a5{width:148mm;padding:6mm;font-size:10.5px}
.inv.a4 th,.inv.a4 td,.inv.a5 th,.inv.a5 td{border:1px solid #444;padding:3px 5px}
.inv th{background:#eee}
.inv .hd{display:flex;justify-content:space-between;gap:10px;border-bottom:2px solid #000;padding-bottom:6px;margin-bottom:6px}
.inv .num{text-align:right}
.inv.thermal{font-size:11px;padding:2mm;line-height:1.3}
.inv.thermal.w3{width:76mm}.inv.thermal.w2{width:52mm;font-size:10px}
.inv.thermal table td,.inv.thermal table th{border:0;border-bottom:1px dashed #777;padding:2px 1px;text-align:left}
.inv.thermal .num{text-align:right}
.inv.thermal hr{border:0;border-top:1px dashed #000}
/* invoice templates */
.inv.tpl-modern{font-family:"Segoe UI",system-ui,Arial,sans-serif}
.inv.tpl-modern .hd{background:linear-gradient(90deg,#0a8fc4,#5b00a8);color:#fff;padding:12px 14px;border:0;border-radius:10px;margin-bottom:10px}
.inv.tpl-modern th,.inv.tpl-modern td{border:0!important;border-bottom:1px solid #e5e9f0!important}
.inv.tpl-modern th{background:#eaf4fb;color:#075985;font-size:.92em}
.inv.tpl-modern tbody tr:nth-child(even) td{background:#f8fafc}
.inv.tpl-modern table table td{border-bottom:1px solid #e5e9f0!important}
.inv.tpl-modern .num b{color:#5b00a8}
.inv.tpl-minimal{font-family:Arial,Helvetica,sans-serif;color:#222}
.inv.tpl-minimal .hd{border-bottom:1px solid #999}
.inv.tpl-minimal h2{font-weight:600;font-size:1.25em}
.inv.tpl-minimal th,.inv.tpl-minimal td{border:0!important;border-bottom:1px solid #ddd!important}
.inv.tpl-minimal th{background:#fff;text-transform:uppercase;font-size:.8em;letter-spacing:.05em;color:#555;border-bottom:1px solid #444!important}
.inv.tpl-detailed th{background:#dfe7f1}
.inv.tpl-detailed.a4{font-size:11px}
.inv.thermal.tpl-compact{font-size:10.5px;line-height:1.2}
.inv.thermal.tpl-compact hr{margin:2px 0}
.tplcard{border:2px solid var(--line);border-radius:12px;padding:10px;cursor:pointer;background:#fff;display:block}
.tplcard.on{border-color:var(--brand);box-shadow:0 0 0 3px #d5edf8}
.tplprev{height:250px;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#f8fafc;position:relative}
.grid3>*,.grid2>*{min-width:0}
.tplcard{min-width:0;overflow:hidden}
.tplprev .inv{position:absolute;top:0;left:0;transform-origin:top left;transform:scale(.3);width:210mm!important;margin:0;pointer-events:none}
.tplprev.th .inv{transform:scale(.7);width:76mm!important;margin:6px}
.print-bar{max-width:210mm;margin:10px auto;display:flex;gap:8px;flex-wrap:wrap;align-items:center}

@media (max-width:1100px){
  .pos{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:1000px){
  .grid2,.grid3,.form-grid,.form-grid.c3,.form-grid.c4{grid-template-columns:1fr}.span2,.span3{grid-column:auto}
}
@media (max-width:820px){
  .side{position:fixed;left:-240px;z-index:60;transition:left .2s;box-shadow:4px 0 20px rgba(0,0,0,.2)}
  .side.open{left:0}.burger{display:block}
  .content{padding:12px}
  .top{gap:8px;padding:8px 10px}.top .title{white-space:nowrap}
  .top .who{gap:6px}.top .who .muted,.top .who .badge,.top .who .btn:not(.logout-btn){display:none}
  .pos-head{grid-template-columns:1fr 1fr}
}
@media print{
  body{background:#fff}.side,.top,.print-bar,.no-print{display:none!important}
  .content{padding:0}.card{border:0;padding:0}
  .inv{margin:0}
}