:root{--bg:#f4f6f9;--card:#fff;--ink:#1d2330;--muted:#6b7385;--line:#e3e7ee;--pri:#1f6feb;--pri-d:#1557c0;--good:#11845b;--bad:#c62f2f;--warn:#b26b00;--side:#17202e}
*{box-sizing:border-box}
body{margin:0;font:14px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali",Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--pri);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:22px;margin:0 0 14px}h2{font-size:16px;margin:0 0 10px}h3{font-size:15px;margin:0 0 8px}h4{margin:0 0 8px}
.top{position:fixed;top:0;left:0;right:0;height:52px;background:var(--side);color:#fff;display:flex;align-items:center;gap:14px;padding:0 16px;z-index:20}
.top .brand{color:#fff;font-weight:700;font-size:16px}.top .who{margin-left:auto;font-size:13px}.top .who a{color:#9cc3ff}
.menu-btn{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
nav.side{position:fixed;top:52px;bottom:0;left:0;width:210px;background:var(--side);overflow-y:auto;padding:8px 0;z-index:15}
nav.side a{display:block;color:#c9d2e3;padding:9px 18px;font-size:14px}nav.side a:hover{background:#243045;text-decoration:none;color:#fff}
nav.side a.on{background:var(--pri);color:#fff}
main{margin:52px 0 0 210px;padding:20px 24px;max-width:1400px}main.bare{margin:0 auto;max-width:420px;padding-top:10vh}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:16px}
.card.login h1{text-align:center}.card.login p{text-align:center}
.head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}.head h1{margin:0}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px;margin-bottom:16px}
.stat{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--pri);border-radius:8px;padding:12px}
.stat span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.3px}.stat b{font-size:19px;display:block;margin-top:2px}
.stat small{color:var(--muted)}.stat.good{border-left-color:var(--good)}.stat.warn{border-left-color:var(--warn)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid2>.card{margin-bottom:0}.grid2{margin-bottom:16px}
table{width:100%;border-collapse:collapse}th,td{padding:8px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:12px;text-transform:uppercase;color:var(--muted);background:#fafbfd;font-weight:600}
tr.sum td{font-weight:700;background:#fafbfd}tr.dim{opacity:.5}
.r{text-align:right}.muted{color:var(--muted)}.good{color:var(--good)}.bad{color:var(--bad)}
.scroll{overflow-x:auto}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid #cfd6e2;border-radius:6px;background:#fff;width:100%;color:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid #b8d3ff;border-color:var(--pri)}
input[type=checkbox]{width:auto}
label{display:block;font-size:13px;color:#3a4252;margin-bottom:10px}label.check{display:flex;gap:8px;align-items:center}
.form .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.narrow{max-width:420px}
button,.btn{font:inherit;display:inline-block;padding:8px 14px;border-radius:6px;border:1px solid #cfd6e2;background:#fff;color:var(--ink);cursor:pointer;text-decoration:none!important}
button:hover,.btn:hover{background:#f0f3f8}
.primary{background:var(--pri)!important;color:#fff!important;border-color:var(--pri)!important}.primary:hover{background:var(--pri-d)!important}
.big{padding:12px 22px;font-size:16px}.wide{width:100%}
button.bad,.btn.bad{color:var(--bad);border-color:#f0b9b9}button.link{background:none;border:0;padding:0;color:var(--pri)}button.link.bad{color:var(--bad)}
button:disabled{opacity:.6;cursor:wait}
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}.filters input,.filters select{width:auto;min-width:150px}
.filters label{margin:0;display:flex;gap:6px;align-items:center}
form.inline{display:inline}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:14px;background:#e6f6ee;color:#0c6844;border:1px solid #b7e3cc}
.flash.err{background:#fdecec;color:#9c2020;border-color:#f3c0c0}.flash.warn{background:#fff6e5;color:#8a5300;border-color:#f5d9a3}
.badge{display:inline-block;padding:1px 7px;border-radius:10px;font-size:11px;background:#e8eefb;color:#2a4d8f;font-weight:600;vertical-align:middle}
.role-admin{background:#fde2e2;color:#9c2020}.role-manager{background:#fff0d6;color:#8a5300}.role-staff{background:#e2f3ea;color:#0c6844}
.st-in_stock{background:#e2f3ea;color:#0c6844}.st-sold{background:#e8eefb;color:#2a4d8f}.st-defective{background:#fde2e2;color:#9c2020}.st-returned_supplier{background:#eee;color:#555}
.picker{position:relative;margin:6px 0 10px}.picker input{font-size:16px;padding:11px 12px;border:2px solid var(--pri)}
.results{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,.12);max-height:320px;overflow:auto;z-index:30}
label .results{font-size:14px}
.res{padding:9px 12px;cursor:pointer;border-bottom:1px solid var(--line)}.res:hover{background:#eef4ff}
#items td{vertical-align:middle}#items input.qty{width:80px}#items input.price{width:120px}#items textarea{min-width:200px}
.sn-box{max-height:140px;overflow:auto;border:1px solid var(--line);border-radius:6px;padding:4px 8px;min-width:200px;margin-top:4px}
.sn-box label{margin:2px 0;display:flex;gap:6px;align-items:center;font-family:ui-monospace,Consolas,monospace;font-size:12px}
.sn-filter{padding:5px 8px!important;font-size:12px}
.totals{margin:14px 0 14px auto;max-width:420px}.totals>div{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:5px 0;border-bottom:1px dashed var(--line)}
.totals input{width:140px;text-align:right}.totals select{width:100px}.totals b{font-size:17px}
.tabs{display:flex;gap:4px;margin-bottom:14px;border-bottom:2px solid var(--line);flex-wrap:wrap}
.tabs a{padding:9px 16px;border-radius:6px 6px 0 0;color:var(--muted)}.tabs a.on{background:var(--pri);color:#fff}
form.sub{background:#fafbfd;border:1px solid var(--line);border-radius:8px;padding:12px}
.danger-zone{margin-top:24px;padding-top:12px;border-top:1px dashed #f0b9b9}
details summary{cursor:pointer}details[open] summary{margin-bottom:12px}
code{background:#eef1f6;padding:1px 5px;border-radius:4px}
@media (max-width:900px){
 nav.side{transform:translateX(-100%);transition:transform .2s}body.nav-open nav.side{transform:none}
 .menu-btn{display:block}main{margin-left:0;padding:16px 12px}.grid2{grid-template-columns:1fr}
 .top .who a{display:none}.top .who a[href="?p=logout"]{display:inline}
}
@media print{.top,nav.side,.filters,button,.btn{display:none!important}main{margin:0}}