:root{
  --primary:#1F3B73;
  --primary-light:#2E5090;
  --accent:#C9A227;
  --bg:#F4F6FA;
  --card:#FFFFFF;
  --text:#1D2433;
  --muted:#6B7280;
  --border:#E4E7ED;
  --success:#1B9E5A;
  --warning:#C77D0A;
  --danger:#C0392B;
  --sidebar-w:230px;
  --radius:10px;
}
*{box-sizing:border-box;}
body{margin:0;font-family:'Segoe UI',Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;margin:0;padding:0;}

/* Layout */
.app{display:flex;min-height:100vh;}
.sidebar{width:var(--sidebar-w);background:var(--primary);color:#fff;flex-shrink:0;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;}
.sidebar .brand{padding:20px 18px;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.15);display:flex;align-items:center;gap:10px;}
.sidebar .brand span{color:var(--accent);}
.sidebar nav{padding:10px 0;}
.sidebar .group-title{padding:14px 18px 6px;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:rgba(255,255,255,.5);}
.sidebar a.nav-link{display:flex;align-items:center;gap:10px;padding:10px 18px;color:rgba(255,255,255,.85);font-size:13.5px;border-left:3px solid transparent;}
.sidebar a.nav-link:hover, .sidebar a.nav-link.active{background:rgba(255,255,255,.08);border-left-color:var(--accent);color:#fff;}
.main{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-width:0;}
.topbar{background:var(--card);border-bottom:1px solid var(--border);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:10;}
.topbar h1{font-size:18px;margin:0;font-weight:600;}
.content{padding:24px;flex:1;}
.user-chip{display:flex;align-items:center;gap:10px;font-size:13px;}
.user-chip .role{color:var(--muted);font-size:11px;}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:20px;}
.card-title{font-size:15px;font-weight:600;margin:0 0 14px;display:flex;justify-content:space-between;align-items:center;}
.grid{display:grid;gap:18px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media(max-width:1100px){.grid-4{grid-template-columns:repeat(2,1fr);} .grid-3{grid-template-columns:repeat(2,1fr);}}

.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;position:relative;overflow:hidden;}
.stat-card .label{color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.03em;}
.stat-card .value{font-size:24px;font-weight:700;margin-top:6px;}
.stat-card .icon{position:absolute;right:14px;top:14px;font-size:26px;opacity:.18;}
.stat-card.blue{border-top:3px solid var(--primary);}
.stat-card.green{border-top:3px solid var(--success);}
.stat-card.orange{border-top:3px solid var(--warning);}
.stat-card.red{border-top:3px solid var(--danger);}
.stat-card.gold{border-top:3px solid var(--accent);}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:8px;border:1px solid transparent;font-size:13.5px;font-weight:600;cursor:pointer;background:var(--primary);color:#fff;transition:.15s;}
.btn:hover{background:var(--primary-light);}
.btn-outline{background:transparent;border-color:var(--border);color:var(--text);}
.btn-outline:hover{background:var(--bg);}
.btn-sm{padding:5px 10px;font-size:12.5px;}
.btn-success{background:var(--success);}
.btn-danger{background:var(--danger);}
.btn-warning{background:var(--warning);}
.btn-gold{background:var(--accent);color:#1D2433;}
.btn-block{width:100%;justify-content:center;}

/* Forms */
label{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:5px;}
input[type=text],input[type=number],input[type=date],input[type=email],input[type=password],input[type=tel],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;font-size:13.5px;background:#fff;color:var(--text);font-family:inherit;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,59,115,.1);}
.form-group{margin-bottom:14px;}
.form-row{display:flex;gap:14px;flex-wrap:wrap;}
.form-row>div{flex:1;min-width:180px;}

/* Table */
table{width:100%;border-collapse:collapse;}
table th, table td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;font-size:13px;}
table th{background:var(--bg);font-weight:600;color:var(--muted);text-transform:uppercase;font-size:11px;letter-spacing:.03em;}
table tbody tr:hover{background:#FAFBFD;}
.table-wrap{overflow-x:auto;}

/* Badges */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:700;text-transform:uppercase;}
.badge.paid{background:#E4F6EC;color:var(--success);}
.badge.unpaid{background:#FDEAEA;color:var(--danger);}
.badge.partial{background:#FFF3DE;color:var(--warning);}
.badge.draft{background:#EEE;color:#666;}
.badge.cancelled{background:#F1F1F1;color:#999;}
.badge.active{background:#E4F6EC;color:var(--success);}
.badge.inactive{background:#F1F1F1;color:#999;}

/* Alerts */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:13.5px;}
.alert-success{background:#E4F6EC;color:var(--success);}
.alert-danger{background:#FDEAEA;color:var(--danger);}
.alert-info{background:#EAF1FD;color:var(--primary);}

/* Login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),#0F1F3D);}
.login-box{background:#fff;padding:40px;border-radius:14px;width:380px;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.login-box h2{margin:0 0 4px;color:var(--primary);}
.login-box p.sub{color:var(--muted);margin:0 0 24px;font-size:13px;}

/* Tabs */
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:18px;}
.tabs a{padding:10px 16px;font-size:13.5px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-2px;}
.tabs a.active{color:var(--primary);border-color:var(--primary);}

/* Line item table in invoice forms */
.item-table input, .item-table select{padding:6px 8px;font-size:12.5px;}
.item-table td{padding:6px;}
.text-right{text-align:right;}
.text-center{text-align:center;}
.muted{color:var(--muted);}
.mt-0{margin-top:0;}
.mb-0{margin-bottom:0;}

/* Print / A4 invoice styling (shared with print templates) */
.invoice-page{background:#fff;width:210mm;min-height:297mm;margin:0 auto;padding:14mm;position:relative;}
.invoice-toolbar{max-width:210mm;margin:14px auto;display:flex;gap:10px;justify-content:flex-end;}
@media print{
  body{background:#fff;}
  .no-print{display:none !important;}
  .invoice-page{width:auto;min-height:auto;margin:0;padding:10mm;box-shadow:none;}
  @page{size:A4;margin:8mm;}
}
@media screen{
  .invoice-page{box-shadow:0 0 20px rgba(0,0,0,.08);margin-bottom:30px;}
}

/* Responsive */
@media(max-width:900px){
  .sidebar{transform:translateX(-100%);transition:.2s;z-index:100;}
  .sidebar.open{transform:translateX(0);}
  .main{margin-left:0;}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}
}