:root{
--nav:#0e3764;
--nav2:#174e86;
--bg:#f3f6fa;
--card:#fff;
--text:#132238;
--muted:#6b7280;
--line:#d8e0ea;
--accent:#1769aa;
--green:#16824b;
--amber:#b7791f;
--red:#c9362b;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,"Noto Sans Devanagari","Mangal",sans-serif;background:var(--bg);color:var(--text)}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
/* LOGIN */
.login-screen{
min-height:100vh;
display:flex;
align-items:center;
justify-content:center;
padding:20px;
background:linear-gradient(135deg,#0d2d52,#1b72b8);
}
.login-card{
width:min(420px,100%);
background:#fff;
border-radius:18px;
padding:28px;
box-shadow:0 20px 60px rgba(0,0,0,.22);
}
.login-logo{
width:64px;height:64px;border-radius:16px;
display:flex;align-items:center;justify-content:center;
background:#eaf3fb;color:#0e4b82;font-size:30px;font-weight:900;margin-bottom:14px
}
.login-card h1{margin:0 0 5px;font-size:25px}
.login-card p{margin:0 0 22px;color:var(--muted)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12px;font-weight:800;color:#526273;margin-bottom:6px}
.field input,.field select,.field textarea{
width:100%;border:1px solid #ccd5e0;border-radius:9px;padding:10px 11px;outline:none;background:#fff;
}
.field textarea{resize:vertical;min-height:70px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#3387ca;box-shadow:0 0 0 3px rgba(51,135,202,.12)}
.btn{border:0;border-radius:9px;padding:10px 14px;font-weight:800}
.btn-primary{background:#0f5f9c;color:#fff}
.btn-secondary{background:#edf3f8;color:#26445e}
.btn-success{background:#16824b;color:#fff}
.btn-danger{background:#ffe8e5;color:#b42318}
.btn-warning{background:#fff4d6;color:#805700}
.login-btn{width:100%;padding:12px}
.demo-cred{margin-top:14px;padding:10px 12px;background:#f3f6f9;border-radius:9px;font-size:12px;color:#526273}
/* APP */
.app{min-height:100vh}
.sidebar{
position:fixed;left:0;top:0;bottom:0;width:240px;background:linear-gradient(#0d3159,#0f477c);color:#fff;padding:18px 12px;z-index:5
}
.brand{padding:6px 10px 18px;border-bottom:1px solid rgba(255,255,255,.14);margin-bottom:13px}
.brand b{display:block;font-size:19px}
.brand span{font-size:11px;opacity:.78}
.nav-btn{
width:100%;border:0;background:transparent;color:#fff;text-align:left;border-radius:9px;padding:10px 12px;margin:3px 0;font-weight:700;
}
.nav-btn:hover,.nav-btn.active{background:rgba(255,255,255,.14)}
.nav-icon{display:inline-block;width:24px}
.logout{position:absolute;bottom:16px;left:12px;right:12px}
.main{margin-left:240px;min-height:100vh}
.topbar{
height:64px;background:#fff;border-bottom:1px solid #e3e8ef;display:flex;align-items:center;justify-content:space-between;padding:0 22px;
position:sticky;top:0;z-index:3
}
.topbar h2{margin:0;font-size:20px}
.topbar small{color:var(--muted)}
.content{padding:22px}
.page{display:none}
.page.active{display:block}
.grid{display:grid;gap:16px}
.stats{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{
background:#fff;border:1px solid #e4e9ef;border-radius:14px;padding:17px;box-shadow:0 5px 18px rgba(13,49,89,.05)
}
.stat .label{font-size:12px;color:#697586;font-weight:800}
.stat .value{font-size:28px;font-weight:900;color:#0e3764;margin:5px 0 2px}
.stat .sub{font-size:11px;color:#7c8795}
.card{background:#fff;border:1px solid #e4e9ef;border-radius:14px;box-shadow:0 5px 18px rgba(13,49,89,.05);overflow:hidden}
.card-head{padding:14px 16px;border-bottom:1px solid #e7ebf0;display:flex;align-items:center;justify-content:space-between;gap:10px}
.card-head h3{margin:0;font-size:16px}
.card-body{padding:16px}
.two-col{grid-template-columns:1.2fr .8fr}
.row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.row-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:10px 9px;border-bottom:1px solid #e7ebf0;text-align:left;font-size:13px;vertical-align:middle}
th{font-size:11px;color:#657286;text-transform:uppercase;background:#f8fafc;white-space:nowrap}
.badge{display:inline-block;padding:5px 8px;border-radius:999px;font-size:11px;font-weight:800}
.badge.green{background:#e7f6ee;color:#0d6c3c}
.badge.amber{background:#fff5db;color:#8b6400}
.badge.red{background:#ffe8e5;color:#b42318}
.note{font-size:12px;color:#687485}
.section-title{margin:0 0 14px;font-size:20px}
.empty{text-align:center;color:#7b8794;padding:30px}
.product-picker{display:grid;grid-template-columns:1fr 120px 120px auto;gap:8px;align-items:end}
.totalbar{display:flex;justify-content:flex-end;margin-top:15px}
.totalbox{min-width:270px;border:1px solid #d7dee7;border-radius:10px;overflow:hidden}
.totalrow{display:flex;justify-content:space-between;padding:10px 12px;border-bottom:1px solid #edf0f3}
.totalrow:last-child{border:0;background:#eef5fb;font-size:18px;font-weight:900;color:#0f477c}
/* Invoice */
.invoice-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.invoice-stage{background:#79bf93;padding:20px;overflow:auto;border-radius:14px}
.invoice-paper{
width:210mm;min-height:297mm;margin:0 auto;background:#eef7e9;padding:16mm 14mm 13mm;box-shadow:0 14px 30px rgba(0,0,0,.24)
}
.invoice-inner{background:#fff;min-height:267mm;padding:9mm 11mm 12mm}
.inv-small{text-align:center;font-size:13px;font-weight:800;color:#123d80}
.inv-gst{display:flex;justify-content:space-between;font-size:15px;font-weight:900;color:#0b3979;margin:3px 0}
.inv-brand{display:grid;grid-template-columns:78px 1fr;align-items:center}
.inv-logo{width:72px;height:72px;border:2px solid #0b3979;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:40px;font-weight:900;color:#0b3979}
.inv-shop{text-align:center;font-size:34px;color:#d71313;font-weight:900;line-height:1.1}
.inv-address{width:max-content;max-width:100%;margin:5px auto;border:2px solid #0b3979;padding:3px 10px;text-align:center;font-size:16px;font-weight:800;color:#0b3979}
.inv-brands{text-align:center;font-size:14px;line-height:1.35;font-weight:800;color:#0b3979;margin:7px 0 13px}
.inv-info{display:grid;grid-template-columns:1fr 1fr;gap:6px 18px;color:#0b3979;font-weight:800;font-size:14px;margin-bottom:9px}
.inv-line{display:flex;gap:5px;align-items:flex-end}
.inv-line span:last-child{flex:1;border-bottom:1.7px solid #0b3979;min-height:20px;color:#111;padding:0 4px}
.inv-full{grid-column:1/-1}
.inv-table{width:100%;border-collapse:separate;border-spacing:0;border:2px solid #0b3979;border-radius:8px;overflow:hidden;color:#0b3979;table-layout:fixed}
.inv-table th,.inv-table td{border-right:2px solid #0b3979;border-bottom:1px solid #7890ae;padding:6px}
.inv-table th:last-child,.inv-table td:last-child{border-right:0}
.inv-table th{color:#d71313;background:#fff;text-align:center;font-size:14px;border-bottom:2px solid #0b3979}
.inv-table td{height:30px;color:#111;font-size:13px}
.inv-sno{width:9%;text-align:center}.inv-desc{width:48%}.inv-qty{width:11%;text-align:center}.inv-rate{width:15%;text-align:right}.inv-amt{width:17%;text-align:right}
.inv-bottom{display:grid;grid-template-columns:1fr 190px}
.inv-words{border-left:2px solid #0b3979;border-bottom:2px solid #0b3979;padding:8px;font-size:13px;font-weight:800;color:#0b3979}
.inv-total{border:2px solid #0b3979;border-top:0;border-radius:0 0 8px 8px;padding:9px;font-size:17px;font-weight:900;color:#0b3979;display:flex;justify-content:space-between}
.inv-sign{display:flex;justify-content:space-between;margin-top:38px;color:#0b3979;font-weight:800;font-size:13px}
.inv-sign span{min-width:170px;border-top:1.7px solid #0b3979;padding-top:5px;text-align:center}
@media(max-width:1000px){
.stats{grid-template-columns:repeat(2,1fr)}
.two-col{grid-template-columns:1fr}
.product-picker{grid-template-columns:1fr 100px 110px}
.product-picker .addpick{grid-column:1/-1}
}
@media(max-width:760px){
.sidebar{position:static;width:100%;height:auto;display:flex;overflow:auto;padding:8px}
.brand,.logout{display:none}
.nav-btn{min-width:max-content}
.main{margin-left:0}
.topbar{height:auto;padding:12px 14px}
.content{padding:12px}
.stats{grid-template-columns:1fr 1fr}
.row,.row-3{grid-template-columns:1fr}
.invoice-stage{padding:6px}
.invoice-paper{transform-origin:top left}
}
@media print{
@page{size:A4;margin:0}
body{background:#fff}
.sidebar,.topbar,.content>.page:not(#invoicePage),.invoice-toolbar{display:none!important}
.main{margin:0}
.content{padding:0}
#invoicePage{display:block!important}
.invoice-stage{padding:0;background:#fff;border-radius:0;overflow:visible}
.invoice-paper{width:210mm;min-height:297mm;margin:0;padding:14mm 12mm 12mm;box-shadow:none;background:#eef7e9}
.invoice-inner{min-height:271mm}
}

/* PHP integration helpers — keeps the same reference UI style */
button.nav-btn{display:block}
.alert{padding:10px 12px;border-radius:9px;margin-bottom:14px;font-size:13px;font-weight:700}
.alert.success{background:#e7f6ee;color:#0d6c3c}.alert.error{background:#ffe8e5;color:#b42318}.alert.warning{background:#fff5db;color:#8b6400}
.btn-sm{padding:7px 9px;font-size:12px}
.inline-form{display:inline}
.search-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.search-form input{border:1px solid #ccd5e0;border-radius:9px;padding:9px 10px;outline:none}
.search-form input:focus{border-color:#3387ca;box-shadow:0 0 0 3px rgba(51,135,202,.12)}
.muted{color:var(--muted)}
.stock-number{font-weight:900}
.lang-switch{display:flex;gap:8px;flex-wrap:wrap}
.table-link{color:#0f5f9c;font-weight:800}
.user-tag{display:inline-block;padding:5px 8px;border-radius:999px;font-size:11px;font-weight:800;background:#eaf3fb;color:#0e4b82}
@media(max-width:760px){.logout{position:static}.sidebar form{margin:0}.search-form{width:100%}.search-form input{flex:1;min-width:140px}}