/* NEXUS POS — shared app stylesheet (same design tokens as the approved HTML mockup) */
:root{
  --ink:#0F172A; --blue:#2563EB; --blue-dim:#1D4ED8; --green:#22C55E; --green-dim:#16A34A;
  --paper:#F8FAFC; --paper-dim:#EEF2F7; --line:#E2E8F0; --muted:#64748B;
  --surface:rgba(255,255,255,.7); --shadow-card:0 4px 18px -6px rgba(15,23,42,.10);
  --radius-lg:22px; --radius-md:16px; --radius-sm:10px; --sidebar-w:260px;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Inter',sans-serif;background:var(--paper);color:var(--ink);}
h1,h2,h3{font-family:'Poppins',sans-serif;}
a{text-decoration:none;color:inherit;}
.app-shell{display:flex;min-height:100vh;}
.sidebar{width:var(--sidebar-w);background:linear-gradient(180deg,var(--ink),#16233F);color:#E5EAF3;padding:20px 14px;}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:6px 8px 20px;color:#fff;font-weight:700;}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--green));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;}
.nav-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#64748B;margin:14px 10px 6px;font-weight:700;}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;font-size:13px;color:#C7D0E0;margin-bottom:2px;}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(37,99,235,.5));color:#fff;}
.main{flex:1;min-width:0;}
.topbar{display:flex;align-items:center;gap:14px;padding:14px 26px;background:var(--surface);border-bottom:1px solid var(--line);}
.content{padding:24px 26px 48px;}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);}
.card-pad{padding:20px;}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:20px;flex-wrap:wrap;gap:10px;}
.page-head h1{font-size:21px;font-weight:600;}
.sub{color:var(--muted);font-size:13px;}
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 16px;border-radius:10px;font-size:13px;font-weight:600;border:none;cursor:pointer;text-decoration:none;}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-dim));color:#fff;}
.btn-success{background:linear-gradient(135deg,var(--green),var(--green-dim));color:#fff;}
.btn-ghost{background:var(--paper-dim);color:var(--ink);border:1px solid var(--line);}
.btn-danger{background:#FEE2E2;color:#B91C1C;}
table{width:100%;border-collapse:collapse;font-size:13px;}
thead th{text-align:left;font-size:11px;text-transform:uppercase;color:var(--muted);padding:0 10px 8px;}
tbody td{padding:11px 10px;border-top:1px solid var(--line);}
tbody tr:hover{background:var(--paper-dim);}
.status-pill{font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px;}
.status-pill.paid,.status-pill.active,.status-pill.in_stock{background:rgba(34,197,94,.12);color:var(--green-dim);}
.status-pill.pending,.status-pill.low{background:rgba(245,158,11,.14);color:#B45309;}
.status-pill.due,.status-pill.inactive,.status-pill.out{background:rgba(239,68,68,.1);color:#DC2626;}
.field{margin-bottom:14px;}
.field label{font-size:12px;font-weight:600;color:var(--muted);display:block;margin-bottom:5px;}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;font-size:13px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.alert{padding:12px 16px;border-radius:10px;font-size:13px;margin-bottom:16px;}
.alert-success{background:rgba(34,197,94,.12);color:var(--green-dim);}
.alert-error{background:rgba(239,68,68,.1);color:#DC2626;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px;}
.stat-card{padding:18px;}
.stat-card .label{font-size:12px;color:var(--muted);}
.stat-card .value{font-size:22px;font-weight:700;font-family:'Poppins',sans-serif;margin-top:4px;}