*{box-sizing:border-box;margin:0;padding:0}
:root{
  --red:#c0392b;--red-dark:#96281b;--red-light:#f9eae8;
  --bone:#f5f0e8;--bone-mid:#e8e0d0;--bone-dark:#c8b89a;
  --ink:#1a1a1a;--ink-mid:#444;--ink-light:#777;
  --white:#fff;--border:#ddd4c4;
  --success:#2e7d32;--success-bg:#e8f5e9;
  --warn:#e65100;--warn-bg:#fff3e0;
  --radius:6px;
}
body{font-family:'Barlow',sans-serif;background:var(--bone);color:var(--ink);min-height:100vh;font-size:15px}

/* LAYOUT — Xero-style top navigation */
#app{min-height:100vh}
#topnav{display:flex;align-items:center;gap:4px;background:var(--red-dark);padding:0 16px;height:54px;position:sticky;top:0;z-index:100}
#main{background:var(--bone);min-height:calc(100vh - 54px);overflow-x:hidden}

/* TOP NAV */
.nav-brand{display:flex;align-items:center;margin-right:12px;flex-shrink:0}
.nav-brand .brand-name{color:#fff;font-family:'Barlow Condensed',sans-serif;font-weight:700;font-size:17px;letter-spacing:0.3px;max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.company-switch{background:rgba(255,255,255,0.16);color:#fff;border:1px solid rgba(255,255,255,0.28);border-radius:6px;padding:6px 8px;font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;max-width:240px}
#nav-menu{display:flex;align-items:center;gap:2px;flex:1}
.nav-item{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;color:rgba(255,255,255,0.85);cursor:pointer;font-size:14px;font-weight:500;border-radius:6px;text-decoration:none;white-space:nowrap}
.nav-item:hover{background:rgba(255,255,255,0.12);color:#fff}
.nav-item.active{background:rgba(255,255,255,0.20);color:#fff}
.nav-group-btn{display:inline-flex;align-items:center;gap:5px;padding:8px 12px;background:transparent;border:none;color:rgba(255,255,255,0.85);cursor:pointer;font-size:14px;font-weight:500;font-family:inherit;border-radius:6px;white-space:nowrap}
.nav-group-btn:hover{background:rgba(255,255,255,0.12);color:#fff}
.nav-dd{position:relative}
.dd-menu{display:none;position:absolute;top:calc(100% + 4px);left:0;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 28px rgba(0,0,0,0.18);min-width:190px;padding:6px;z-index:120}
.nav-dd.open .dd-menu{display:block}
.dd-menu a{display:flex;align-items:center;gap:8px;padding:8px 12px;color:var(--ink);font-size:14px;font-weight:500;border-radius:6px;cursor:pointer;text-decoration:none}
.dd-menu a:hover{background:var(--bone);color:var(--red)}
.dd-menu a.active{background:var(--red-light);color:var(--red)}
.dd-right{right:0;left:auto}
.nav-right{margin-left:auto;flex-shrink:0;display:flex;align-items:center}
.nav-badge{background:var(--red);color:#fff;font-size:10px;padding:1px 6px;border-radius:10px;margin-left:auto}
#auth-screen{display:none;min-height:100vh;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f2937 0%,#0f172a 100%);padding:20px}
.auth-card{background:#fff;border-radius:12px;padding:32px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,0.35)}
.auth-logo{font-family:'Barlow Condensed',sans-serif;font-weight:700;font-size:22px;color:var(--red);line-height:1.1}
.auth-logo span{display:block;font-size:11px;font-weight:400;color:var(--ink-light);letter-spacing:1px;text-transform:uppercase;margin-top:2px}
.auth-brands{display:flex;gap:8px;justify-content:center;margin:-4px 0 6px}
.auth-brands img{height:50px;width:auto;border-radius:7px;box-shadow:0 1px 4px rgba(0,0,0,.18)}
.auth-brands-cap{text-align:center;font-size:11px;color:var(--ink-light);letter-spacing:.4px;margin-bottom:4px}
.auth-card h2{font-family:'Barlow Condensed',sans-serif;margin:18px 0 14px;font-size:20px}
.auth-note{font-size:12px;color:var(--ink-light);margin:-6px 0 14px}
.auth-error{color:var(--red);font-size:13px;min-height:18px;margin:8px 0}
#menu-toggle{display:none}
#sidebar-backdrop{display:none}
@media(max-width:880px){
  #menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:rgba(255,255,255,0.16);color:#fff;border:none;border-radius:8px;font-size:18px;cursor:pointer;margin-left:auto;order:3}
  .nav-right{order:4;margin-left:6px}
  .nav-brand{margin-right:auto}
  #nav-menu{display:none;position:absolute;top:54px;left:0;right:0;background:var(--red-dark);flex-direction:column;align-items:stretch;gap:0;padding:8px;z-index:130;box-shadow:0 12px 24px rgba(0,0,0,0.3)}
  body.nav-open #nav-menu{display:flex}
  #nav-menu .nav-item,#nav-menu .nav-group-btn{width:100%;justify-content:flex-start}
  .nav-dd{position:static}
  .dd-menu{position:static;display:none;box-shadow:none;border:none;background:rgba(255,255,255,0.06);margin:2px 0 6px;min-width:0}
  .nav-dd.open .dd-menu{display:block}
  .dd-menu a{color:rgba(255,255,255,0.85)}
  .dd-menu a:hover,.dd-menu a.active{background:rgba(255,255,255,0.12);color:#fff}
  .topbar{flex-wrap:wrap;row-gap:8px}
  .topbar h1{font-size:20px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:10px}
  .overview-grid{grid-template-columns:1fr}
  .content{padding:14px}
  .table-wrap{overflow-x:auto}
  .modal{max-width:96vw}
  .form-row.col2,.form-row.col3{grid-template-columns:1fr}
  .list-toolbar input{max-width:none}
}

/* TOPBAR */
.topbar{background:var(--white);border-bottom:1px solid var(--border);padding:16px 28px;display:flex;align-items:center;justify-content:space-between}
.list-toolbar{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.list-toolbar input,.list-toolbar select{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;background:var(--white)}
.list-toolbar input{flex:1;min-width:180px;max-width:340px}
.topbar h1{font-family:'Barlow Condensed',sans-serif;font-size:22px;font-weight:700;letter-spacing:0.3px;color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);font-size:13px;font-weight:600;cursor:pointer;border:none;font-family:'Barlow',sans-serif;transition:all 0.15s;text-decoration:none}
.btn-primary{background:var(--red);color:#fff}.btn-primary:hover{background:var(--red-dark)}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--border)}.btn-outline:hover{background:var(--bone)}
.btn-ghost{background:transparent;color:var(--ink-light);border:none;padding:6px 10px}.btn-ghost:hover{color:var(--red)}
.btn-danger{background:#fde8e8;color:var(--red);border:1px solid #f5c6c6}.btn-danger:hover{background:#f5c6c6}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-success{background:var(--success-bg);color:var(--success);border:1px solid #c8e6c9}.btn-success:hover{background:#c8e6c9}

/* CONTENT */
.content{padding:28px}

/* CARDS */
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.card-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.card-body{padding:20px}
.card-title{font-weight:600;font-size:15px}

/* STATS GRID */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stat-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}
.stat-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.8px;color:var(--ink-light);margin-bottom:8px}
.stat-value{font-family:'Barlow Condensed',sans-serif;font-size:28px;font-weight:700;color:var(--ink);line-height:1}
.stat-sub{font-size:12px;color:var(--ink-light);margin-top:4px}
.stat-card.danger .stat-value{color:var(--red)}
.stat-card.success .stat-value{color:var(--success)}
/* Xero-style business-overview cards with aging bar charts */
.overview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:20px;margin-bottom:24px}
.overview-card .card-body{padding:16px 20px 18px}
.overview-nums{display:flex;align-items:center;gap:22px;margin-bottom:6px}
.ov-num{font-family:'Barlow Condensed',sans-serif;font-size:30px;font-weight:700;color:var(--ink);line-height:1}
.ov-num.ov-overdue{color:var(--red)}
.ov-sub{font-size:12px;color:var(--ink-light);margin-top:3px}
.ov-divider{width:1px;align-self:stretch;background:var(--border)}
.ov-chart{width:100%;height:auto;display:block;margin:8px 0 4px}
.overview-actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* TABLE */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{text-align:left;padding:10px 14px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.7px;color:var(--ink-light);border-bottom:2px solid var(--border);background:var(--bone);white-space:nowrap}
td{padding:11px 14px;border-bottom:1px solid var(--bone-mid);vertical-align:middle}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--bone)}
.text-right{text-align:right}
.text-center{text-align:center}

/* STATUS BADGES */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.badge-paid{background:#e8f5e9;color:#2e7d32}
.badge-unpaid{background:#fff3e0;color:#e65100}
.badge-partial{background:#e3f2fd;color:#1565c0}
.badge-overdue{background:#fde8e8;color:var(--red)}

/* FORMS */
.form-group{margin-bottom:16px}
label{display:block;font-size:12px;font-weight:600;color:var(--ink-mid);margin-bottom:5px;text-transform:uppercase;letter-spacing:0.5px}
input,select,textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:'Barlow',sans-serif;background:var(--white);color:var(--ink);outline:none;transition:border-color 0.15s}
input:focus,select:focus,textarea:focus{border-color:var(--red)}
textarea{resize:vertical;min-height:80px}
.form-row{display:grid;gap:16px}
.form-row.col2{grid-template-columns:1fr 1fr}
.form-row.col3{grid-template-columns:1fr 1fr 1fr}

/* INVOICE LINES */
.lines-table{width:100%;border-collapse:collapse;margin-bottom:12px}
.lines-table th{background:var(--bone);padding:8px 10px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;color:var(--ink-light);border-bottom:1px solid var(--border);text-align:left}
.lines-table td{padding:6px 4px;border-bottom:1px solid var(--bone-mid)}
.lines-table td input{padding:7px 8px;font-size:13px}
.lines-table td:last-child{width:40px}

/* TOTALS */
.totals-block{background:var(--bone);border-radius:var(--radius);padding:16px 20px}
.total-row{display:flex;justify-content:space-between;padding:4px 0;font-size:14px;color:var(--ink-mid)}
.total-row.grand{border-top:1px solid var(--border);margin-top:8px;padding-top:12px;font-size:16px;font-weight:700;color:var(--ink)}
.total-row.owing{color:var(--red);font-weight:700}
.total-row.paid-row{color:var(--success)}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:100;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:var(--white);border-radius:8px;width:100%;max-width:680px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,0.3)}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--white);z-index:1}
.modal-header h2{font-family:'Barlow Condensed',sans-serif;font-size:20px;font-weight:700}
.modal-body{padding:24px}
.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px;position:sticky;bottom:0;background:var(--white)}

/* INVOICE PRINT — fallback for the Print button / physical printing.
   (The "⤓ PDF" button uses the server-side Chromium renderer, which has no browser chrome.) */
#invoice-print{display:none}
@media print{
  @page{size:A4;margin:12mm}
  #app{display:none}
  #invoice-print{display:block!important;font-family:'Barlow',sans-serif;color:#000;padding:0;font-size:12px;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  #invoice-print img{max-height:48px!important;width:auto}
  .print-header{display:flex;justify-content:space-between;margin-bottom:16px;padding-bottom:14px;border-bottom:2px solid #c0392b}
  .print-biz{font-size:20px;font-weight:700;font-family:'Barlow Condensed',sans-serif;color:#c0392b}
  .print-inv-num{font-size:24px;font-weight:700;font-family:'Barlow Condensed',sans-serif}
  .print-table{width:100%;border-collapse:collapse;margin:12px 0}
  .print-table thead{display:table-header-group}
  .print-table tr{page-break-inside:avoid}
  .print-table th{background:#f5f0e8;padding:6px 10px;text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:0.4px}
  .print-table td{padding:6px 10px!important;border-bottom:1px solid #eee}
  .print-totals{width:260px;margin-left:auto;page-break-inside:avoid}
  .print-total-row{display:flex;justify-content:space-between;padding:4px 0;font-size:13px}
  .print-total-grand{border-top:2px solid #c0392b;padding-top:8px;font-weight:700;font-size:15px}
  .print-bank{margin-top:18px;padding:12px 14px;background:#f5f0e8;border-radius:4px;font-size:12px;page-break-inside:avoid}
  .print-footer{margin-top:16px;font-size:10px;color:#777;text-align:center}
}

/* MISC */
.empty-state{text-align:center;padding:60px 20px;color:var(--ink-light)}
.empty-state .empty-icon{font-size:48px;margin-bottom:12px;opacity:0.3}
.empty-state p{font-size:14px;margin-bottom:16px}
.actions{display:flex;gap:6px;align-items:center}
.section-title{font-family:'Barlow Condensed',sans-serif;font-size:18px;font-weight:700;margin-bottom:16px;letter-spacing:0.3px}
.divider{border:none;border-top:1px solid var(--border);margin:20px 0}
.alert{padding:12px 16px;border-radius:var(--radius);font-size:13px;margin-bottom:16px}
.alert-warn{background:var(--warn-bg);color:var(--warn);border:1px solid #ffcc80}
.customer-tag{font-size:12px;color:var(--ink-light)}
.overdue-row td{background:#fff8f8}