:root{
  --primary:#0f766e;
  --primary-dark:#115e59;
  --primary-light:#ccfbf1;
  --sidebar-bg:#0b1f3a;
  --sidebar-hover:#13305e;
  --sidebar-active:#1d4ed8;
  --text-muted:#64748b;
  --border:#e2e8f0;
  --bg:#f8fafc;
  --surface:#ffffff;
  --success:#16a34a;
  --danger:#dc2626;
  --warning:#d97706;
  --info:#0284c7;
}
*{box-sizing:border-box;}
body{background:var(--bg);color:#0f172a;font-family:'Inter','Segoe UI',sans-serif;margin:0;}

/* ---------- App shell ---------- */
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh;}
.sidebar{background:var(--sidebar-bg);color:#cbd5e1;padding:0;overflow-y:auto;position:sticky;top:0;height:100vh;}
.brand{display:flex;align-items:center;gap:12px;padding:20px 20px 16px;border-bottom:1px solid rgba(255,255,255,0.08);}
.brand i{font-size:28px;color:#5eead4;}
.brand-name{font-weight:700;font-size:18px;color:#fff;letter-spacing:.3px;}
.brand-sub{font-size:11px;color:#94a3b8;letter-spacing:2px;text-transform:uppercase;}

.nav-menu{padding:10px 0 40px;}
.nav-group{padding:14px 20px 6px;font-size:10px;font-weight:700;letter-spacing:1.5px;color:#64748b;text-transform:uppercase;}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 20px;color:#cbd5e1;text-decoration:none;font-size:14px;border-left:3px solid transparent;transition:all .15s;}
.nav-item i{font-size:16px;width:20px;}
.nav-item:hover{background:var(--sidebar-hover);color:#fff;}
.nav-item.active{background:linear-gradient(90deg,rgba(29,78,216,0.35),transparent);color:#fff;border-left-color:#5eead4;}

.main{display:flex;flex-direction:column;min-width:0;}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10;}
.page-title{font-weight:600;font-size:18px;color:#0f172a;}
.content{padding:24px;}

/* ---------- KPI cards ---------- */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-bottom:22px;}
.kpi-card{background:var(--surface);border-radius:12px;padding:18px 20px;border:1px solid var(--border);position:relative;overflow:hidden;}
.kpi-card .kpi-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-weight:600;}
.kpi-card .kpi-value{font-size:26px;font-weight:700;margin:6px 0 4px;color:#0f172a;}
.kpi-card .kpi-sub{font-size:12px;color:var(--text-muted);}
.kpi-card .kpi-icon{position:absolute;right:14px;top:14px;font-size:28px;opacity:.18;}
.kpi-card.kpi-accent{border-left:4px solid var(--primary);}
.kpi-card.kpi-success{border-left:4px solid var(--success);}
.kpi-card.kpi-danger{border-left:4px solid var(--danger);}
.kpi-card.kpi-warn{border-left:4px solid var(--warning);}
.kpi-card.kpi-info{border-left:4px solid var(--info);}

/* ---------- Panels ---------- */
.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:20px;}
.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;}
.panel-title{font-weight:600;font-size:15px;}
.panel-sub{font-size:12px;color:var(--text-muted);}
.table-sm th{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:600;}
.table thead th{background:#f1f5f9;}

/* ---------- Forms & buttons ---------- */
.form-label{font-size:13px;font-weight:600;color:#334155;}
.btn-primary{background:var(--primary);border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);}
.btn-outline-primary{color:var(--primary);border-color:var(--primary);}
.btn-outline-primary:hover{background:var(--primary);border-color:var(--primary);}

/* ---------- Login ---------- */
.login-bg{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f766e 0%,#0b1f3a 100%);padding:20px;}
.login-card{background:#fff;border-radius:16px;padding:40px;max-width:420px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.25);}
.login-card.login-wide{max-width:560px;}
#bizTabs .nav-link{color:#64748b;font-weight:500;border-radius:10px;padding:10px 6px;background:#f1f5f9;border:2px solid transparent;}
#bizTabs .nav-link.active{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary);}
#bizTabs .nav-link i{font-size:22px;color:var(--primary);}
.login-brand{text-align:center;margin-bottom:26px;}
.login-brand i{font-size:44px;color:var(--primary);}
.login-brand h2{margin:8px 0 2px;font-weight:700;}
.login-brand .sub{color:var(--text-muted);font-size:13px;letter-spacing:2px;text-transform:uppercase;}

/* ---------- Tables ---------- */
.table-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;}
.table-card .table{margin:0;}
.table-card .table th{background:#f8fafc;border-top:0;}

/* ---------- Badges ---------- */
.badge-pill{padding:4px 10px;border-radius:999px;font-size:11px;font-weight:600;}

/* ---------- Expiry buckets ---------- */
.bucket-expired{color:var(--danger);}
.bucket-d30{color:#d97706;}
.bucket-d90{color:#ca8a04;}
.bucket-d180{color:#65a30d;}

/* ---------- Scrollbar ---------- */
.sidebar::-webkit-scrollbar{width:6px;}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.1);border-radius:3px;}

/* ---------- Responsive ---------- */
@media (max-width: 768px){
  .app-shell{grid-template-columns:1fr;}
  .sidebar{position:fixed;left:-280px;width:260px;z-index:1000;transition:left .25s;}
  body.sidebar-open .sidebar{left:0;}
}

/* ---------- POS ---------- */
.pos-grid{display:grid;grid-template-columns:1fr 380px;gap:16px;}
.pos-cart{background:var(--surface);border-radius:12px;border:1px solid var(--border);padding:16px;min-height:400px;}
.pos-total-row{display:flex;justify-content:space-between;padding:8px 0;}
.pos-grand{font-size:22px;font-weight:700;color:var(--primary);}