:root{
  --ink:#1B2A4A;
  --ink-soft:#3B4A63;
  --paper:#F7F5F0;
  --panel:#FFFFFF;
  --gold:#B8862E;
  --gold-soft:#E8D9B8;
  --slate:#64748B;
  --border:#E3DFD3;
  --danger:#B3462C;
  --danger-soft:#F3E2DC;
  --sidebar-w:230px;
  --font-serif:Georgia,'Times New Roman',serif;
  --font-sans:-apple-system,'Segoe UI',system-ui,Roboto,Arial,sans-serif;
  --font-mono:Consolas,'Courier New',monospace;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{font-family:var(--font-sans);background:var(--paper);color:var(--ink);min-height:100vh;}
#app{display:flex;min-height:100vh;}

/* ---------- Sidebar ---------- */
.sidebar{width:var(--sidebar-w);background:var(--ink);color:#EDE7D8;flex-shrink:0;display:flex;flex-direction:column;padding:22px 0;position:relative;}
.brand{padding:0 20px 20px 20px;border-bottom:1px solid rgba(237,231,216,0.15);margin-bottom:14px;}
.brand .mark{font-family:var(--font-serif);font-size:22px;font-weight:700;letter-spacing:0.3px;color:#fff;line-height:1.25;overflow-wrap:break-word;}
.brand .sub{font-size:11px;color:var(--gold-soft);letter-spacing:1.5px;text-transform:uppercase;margin-top:3px;line-height:1.4;overflow-wrap:break-word;}
.nav{display:flex;flex-direction:column;gap:2px;padding:0 10px;}
.nav-item{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:8px;color:#CBD3E0;text-decoration:none;font-size:14px;cursor:pointer;border-left:3px solid transparent;transition:background .15s;}
.nav-item:hover{background:rgba(255,255,255,0.06);}
.nav-item.active{background:rgba(184,134,46,0.16);border-left:3px solid var(--gold);color:#fff;font-weight:600;}
.nav-icon{width:18px;text-align:center;font-size:15px;}
.sidebar-foot{margin-top:auto;padding:14px 20px 0 20px;font-size:11px;color:#8E97AC;line-height:1.6;border-top:1px solid rgba(237,231,216,0.12);padding-top:14px;}
.sidebar-foot b{color:#CBD3E0;}
.perf{width:14px;flex-shrink:0;position:relative;background:linear-gradient(to right, var(--ink) 50%, var(--paper) 50%);}
.perf::before{content:"";position:absolute;top:0;bottom:0;left:6px;width:2px;background-image:radial-gradient(circle, var(--gold-soft) 2px, transparent 2.2px);background-size:2px 16px;background-repeat:repeat-y;opacity:0.55;}

/* ---------- Main ---------- */
.content{flex:1;min-width:0;padding:28px 32px 60px 26px;}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;flex-wrap:wrap;gap:10px;}
.topbar h1{font-family:var(--font-serif);font-size:26px;margin:0;font-weight:700;color:var(--ink);}
.topbar .eyebrow{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:600;margin-bottom:4px;}
.view{display:none;}
.view.active{display:block;animation:fadein .18s ease;}
@keyframes fadein{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:none;}}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:22px;box-shadow:0 1px 2px rgba(27,42,74,0.04);}
.panel + .panel{margin-top:18px;}

.tile-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:22px;}
.tile{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:22px;cursor:pointer;transition:transform .12s, box-shadow .12s;position:relative;overflow:hidden;}
.tile:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(27,42,74,0.08);border-color:var(--gold-soft);}
.tile .tile-icon{width:42px;height:42px;border-radius:10px;background:var(--gold-soft);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--ink);margin-bottom:14px;}
.tile h3{font-family:var(--font-serif);font-size:19px;margin:0 0 6px 0;}
.tile p{font-size:13px;color:var(--slate);margin:0;line-height:1.5;}
.tile .plus{position:absolute;top:18px;right:18px;font-size:13px;color:var(--gold);font-weight:600;}

.section-title{font-family:var(--font-serif);font-size:17px;font-weight:600;margin:0 0 12px 0;color:var(--ink);}
.muted{color:var(--slate);font-size:13px;}
code{background:var(--paper);padding:1px 6px;border-radius:4px;font-family:var(--font-mono);font-size:12px;}

table.list-table{width:100%;border-collapse:collapse;font-size:13.5px;}
table.list-table th{text-align:left;font-size:11px;letter-spacing:.6px;text-transform:uppercase;color:var(--slate);border-bottom:1px solid var(--border);padding:8px 10px;font-weight:600;}
table.list-table td{padding:10px 10px;border-bottom:1px solid var(--border);vertical-align:middle;}
table.list-table tr:last-child td{border-bottom:none;}
.badge{display:inline-block;padding:3px 9px;border-radius:20px;font-size:11px;font-weight:600;letter-spacing:.3px;}
.badge.invoice{background:#E4EBF5;color:#28497A;}
.badge.quotation{background:var(--gold-soft);color:#6E4E14;}
.mono{font-family:var(--font-mono);}
.row-actions a, .row-actions button{font-size:12px;color:var(--ink-soft);text-decoration:none;margin-right:10px;background:none;border:none;cursor:pointer;padding:0;font-family:inherit;}
.row-actions a:hover, .row-actions button:hover{color:var(--gold);}
.row-actions .del{color:var(--danger);}
.empty-state{padding:34px 10px;text-align:center;color:var(--slate);font-size:13.5px;}
.empty-state .big{font-size:30px;margin-bottom:8px;}

.btn{display:inline-flex;align-items:center;gap:7px;background:var(--ink);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:13.5px;font-weight:600;cursor:pointer;font-family:var(--font-sans);transition:background .15s;}
.btn:hover{background:var(--ink-soft);}
.btn.gold{background:var(--gold);}
.btn.gold:hover{background:#9C7327;}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--border);}
.btn.ghost:hover{background:var(--paper);}
.btn.danger{background:var(--danger-soft);color:var(--danger);}
.btn.danger:hover{background:#EAC9BE;}
.btn:disabled{opacity:.55;cursor:not-allowed;}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}

.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.field-grid.three{grid-template-columns:1fr 1fr 1fr;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12px;font-weight:600;color:var(--ink-soft);margin-bottom:5px;letter-spacing:.2px;}
input[type=text],input[type=number],input[type=date],textarea,select{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:7px;font-size:13.5px;font-family:var(--font-sans);background:#fff;color:var(--ink);}
input:focus,textarea:focus,select:focus{outline:2px solid var(--gold-soft);border-color:var(--gold);}
textarea{resize:vertical;min-height:70px;}
.radio-row{display:flex;gap:16px;flex-wrap:wrap;}
.radio-opt{display:flex;align-items:center;gap:6px;font-size:13.5px;}
.suggest-dropdown{position:absolute;top:100%;left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:8px;margin-top:4px;max-height:190px;overflow-y:auto;z-index:50;box-shadow:0 8px 20px rgba(27,42,74,0.14);}
.suggest-item{padding:8px 12px;font-size:13px;cursor:pointer;border-bottom:1px solid var(--border);}
.suggest-item:last-child{border-bottom:none;}
.suggest-item:hover{background:var(--paper);}
.suggest-item .n{font-weight:600;color:var(--ink);}
.suggest-item .p{color:var(--slate);font-size:11.5px;font-family:var(--font-mono);}
.fs-status{display:flex;align-items:center;gap:8px;font-size:13px;padding:9px 13px;border-radius:8px;background:var(--paper);border:1px solid var(--border);margin-bottom:4px;}
.fs-status.connected{background:#E8F3EA;border-color:#B9DDC0;color:#1F5D30;}
.fs-status.disconnected{background:var(--danger-soft);border-color:#E6C3B8;color:var(--danger);}
.fs-status .dot{width:8px;height:8px;border-radius:50%;background:currentColor;flex-shrink:0;}
.cust-link{color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1px dashed var(--gold-soft);cursor:pointer;}
.cust-link:hover{color:var(--gold);border-bottom-color:var(--gold);}
.cust-detail-info{display:flex;gap:32px;flex-wrap:wrap;padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--border);}
.cust-detail-info .lbl{display:block;font-size:10.5px;letter-spacing:1px;text-transform:uppercase;color:var(--slate);font-weight:600;margin-bottom:4px;}
.cust-detail-info .val{font-size:14px;color:var(--ink);}
.cust-detail-stats{display:flex;gap:36px;margin-bottom:6px;}
.cust-detail-stats > div{display:flex;flex-direction:column;}
.cust-detail-stats .num{font-family:var(--font-mono);font-size:24px;font-weight:700;color:var(--ink);}
.cust-detail-stats .lbl{font-size:11px;letter-spacing:.6px;text-transform:uppercase;color:var(--slate);margin-top:2px;}

fieldset{border:1px solid var(--border);border-radius:10px;padding:16px;margin:0 0 16px 0;}
legend{font-family:var(--font-serif);font-size:14.5px;font-weight:600;padding:0 8px;color:var(--ink);}

table.items-table{width:100%;border-collapse:collapse;margin-top:6px;}
table.items-table th{background:var(--paper);font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--slate);padding:8px 6px;text-align:left;border-bottom:1px solid var(--border);}
table.items-table td{padding:6px;border-bottom:1px solid var(--border);vertical-align:top;}
table.items-table input{padding:7px 8px;font-size:13px;}
table.items-table td.amt{font-family:var(--font-mono);text-align:right;padding-top:12px;font-size:13.5px;}
table.items-table td.rm{text-align:center;padding-top:10px;}
.rm-btn{background:none;border:none;color:var(--danger);cursor:pointer;font-size:15px;}
.add-row-btn{margin-top:10px;}

.totals-mini{margin-top:14px;display:flex;justify-content:flex-end;}
.totals-mini table{border-collapse:collapse;font-size:13.5px;min-width:280px;}
.totals-mini td{padding:5px 10px;}
.totals-mini td.lbl{color:var(--slate);}
.totals-mini td.val{text-align:right;font-family:var(--font-mono);}
.totals-mini tr.grand td{border-top:2px solid var(--gold);font-weight:700;font-size:15px;padding-top:9px;color:var(--ink);}

.upload-box{border:2px dashed var(--border);border-radius:10px;padding:20px;text-align:center;cursor:pointer;background:var(--paper);transition:border-color .15s;display:block;}
.upload-box:hover{border-color:var(--gold);}
.upload-box input{display:none;}
.img-preview{max-height:100px;width:auto;border:1px solid var(--border);border-radius:6px;margin-top:12px;box-shadow:0 2px 8px rgba(0,0,0,0.06);}

.preview-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:10px;}
.preview-shell{background:#DCD8CC;border-radius:12px;padding:26px;overflow-x:auto;}
#billDocument{
  width:210mm;min-height:297mm;margin:0 auto;background-color:#ffffff;
  font-family:var(--font-serif);color:var(--ink);
  box-shadow:0 6px 24px rgba(0,0,0,0.18);
  padding:14mm 16mm 10mm 16mm;display:flex;flex-direction:column;
}
.lp-header{display:flex;align-items:center;gap:14px;margin-bottom:4mm;}
.lp-logo-wrap{flex-shrink:0;}
.lp-logo{max-height:20mm;max-width:42mm;object-fit:contain;display:block;}
.lp-company{flex:1;min-width:0;}
.lp-name{font-family:var(--font-serif);font-size:25px;font-weight:700;color:var(--ink);letter-spacing:.2px;}
.lp-tagline{font-family:var(--font-sans);font-size:11px;color:var(--gold);letter-spacing:1.3px;text-transform:uppercase;margin-top:3px;font-weight:600;}
.lp-contact-bar{font-family:var(--font-sans);font-size:10.5px;color:var(--slate);margin-bottom:3mm;line-height:1.6;}
.lp-rule{height:3px;background:linear-gradient(to right, var(--ink) 0%, var(--ink) 72%, var(--gold) 72%, var(--gold) 100%);margin-bottom:9mm;flex-shrink:0;}
.lp-footer-band{margin-top:auto;background:var(--ink);color:#EDE7D8;font-family:var(--font-sans);font-size:10px;text-align:center;padding:7px 10px;letter-spacing:.3px;flex-shrink:0;}
.bd-sign-img{max-height:16mm;max-width:46mm;object-fit:contain;display:block;margin:0 auto 4px auto;}
.bd-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:8mm;}
.bd-title{font-size:22px;font-weight:700;letter-spacing:1px;color:var(--ink);text-transform:uppercase;}
.bd-title .eyebrow{display:block;font-family:var(--font-sans);font-size:10.5px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;font-weight:600;margin-bottom:3px;}
.bd-meta{text-align:right;font-family:var(--font-mono);font-size:12px;line-height:1.7;color:var(--ink-soft);}
.bd-meta b{color:var(--ink);}
.bd-billto{border-left:3px solid var(--gold);padding:8px 14px;margin-bottom:8mm;background:rgba(184,134,46,0.05);}
.bd-billto .lbl{font-family:var(--font-sans);font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:3px;}
.bd-billto .name{font-size:15px;font-weight:600;}
.bd-billto .line{font-family:var(--font-sans);font-size:12.5px;color:var(--ink-soft);line-height:1.6;}
table.bd-items{width:100%;border-collapse:collapse;font-family:var(--font-sans);font-size:12.5px;margin-bottom:6mm;}
table.bd-items thead th{background:var(--ink);color:#fff;font-size:10px;text-transform:uppercase;letter-spacing:.5px;padding:7px 8px;text-align:left;font-weight:600;}
table.bd-items thead th.num{text-align:right;}
table.bd-items tbody td{padding:7px 8px;border-bottom:1px solid var(--border);}
table.bd-items tbody td.num{text-align:right;font-family:var(--font-mono);}
table.bd-items tbody tr:nth-child(even){background:rgba(0,0,0,0.015);}
.bd-totals{display:flex;justify-content:flex-end;margin-bottom:6mm;}
.bd-totals table{border-collapse:collapse;font-family:var(--font-sans);font-size:12.5px;min-width:70mm;}
.bd-totals td{padding:4px 8px;}
.bd-totals td.l{color:var(--slate);}
.bd-totals td.v{text-align:right;font-family:var(--font-mono);}
.bd-totals tr.grand td{border-top:1.5px solid var(--gold);border-bottom:1.5px solid var(--gold);font-weight:700;font-size:14px;padding:7px 8px;color:var(--ink);}
.bd-words{font-family:var(--font-sans);font-size:11.5px;font-style:italic;color:var(--ink-soft);margin-bottom:8mm;}
.bd-notes{font-family:var(--font-sans);font-size:11px;color:var(--slate);margin-bottom:10mm;line-height:1.6;white-space:pre-line;}
.bd-notes .lbl{font-weight:700;color:var(--ink-soft);text-transform:uppercase;font-size:10px;letter-spacing:1px;display:block;margin-bottom:3px;}
.bd-footer{display:flex;justify-content:space-between;align-items:flex-end;font-family:var(--font-sans);font-size:11.5px;margin-top:12mm;}
.bd-bank .lbl{font-weight:700;color:var(--ink-soft);text-transform:uppercase;font-size:10px;letter-spacing:1px;display:block;margin-bottom:4px;}
.bd-bank div{color:var(--ink-soft);line-height:1.6;}
.bd-sign{text-align:center;}
.bd-sign .line{border-top:1px solid var(--ink-soft);padding-top:5px;font-size:11px;color:var(--ink-soft);}
.bd-noletterhead-banner{background:var(--danger-soft);color:var(--danger);border-radius:8px;padding:10px 14px;font-size:12.5px;margin-bottom:14px;}
.bd-noletterhead-banner a{color:var(--danger);font-weight:700;}

.toast{position:fixed;bottom:24px;right:24px;background:var(--ink);color:#fff;padding:12px 18px;border-radius:8px;font-size:13.5px;box-shadow:0 6px 18px rgba(0,0,0,0.2);z-index:999;opacity:0;transform:translateY(10px);transition:all .25s;}
.toast.show{opacity:1;transform:none;}

@media (max-width:820px){
  #app{flex-direction:column;}
  .sidebar{width:100%;flex-direction:row;align-items:center;padding:8px 10px;overflow-x:auto;-webkit-overflow-scrolling:touch;}
  .brand{border:none;padding:0 10px 0 0;margin-bottom:0;flex-shrink:0;}
  .brand .mark{font-size:16px;}
  .brand .sub{display:none;}
  .nav{flex-direction:row;padding:0;gap:0;}
  .nav-item{border-left:none;border-bottom:3px solid transparent;white-space:nowrap;padding:9px 10px;font-size:13px;gap:6px;flex-shrink:0;}
  .nav-item.active{border-left:none;border-bottom:3px solid var(--gold);}
  .nav-icon{font-size:13px;width:auto;}
  .sidebar-foot{display:none;}
  .perf{display:none;}
  .content{padding:16px 12px 50px 12px;}
  .topbar{margin-bottom:16px;}
  .topbar h1{font-size:20px;}
  .tile-grid{grid-template-columns:1fr;}
  .field-grid,.field-grid.three{grid-template-columns:1fr;}
  .panel{padding:16px;}

  /* bigger, thumb-friendly tap targets; 16px inputs stop iOS auto-zoom-on-focus */
  .btn{padding:12px 16px;font-size:14px;}
  input[type=text],input[type=number],input[type=date],textarea,select{font-size:16px;padding:10px 12px;}
  .btn-row{gap:8px;}

  /* Items table -> stacked cards (a data table with 8 input columns doesn't fit a phone) */
  table.items-table thead{display:none;}
  table.items-table, table.items-table tbody{display:block;}
  table.items-table tr{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px 12px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:10px;
    padding:14px;
    margin-bottom:12px;
  }
  table.items-table td{display:block;padding:0;border:none;}
  table.items-table td.rownum{display:none;}
  table.items-table td[data-label]::before{
    content:attr(data-label);
    display:block;
    font-size:10px;
    text-transform:uppercase;
    letter-spacing:.4px;
    color:var(--slate);
    margin-bottom:4px;
    font-weight:600;
  }
  table.items-table td:nth-child(2){grid-column:1/-1;}
  table.items-table td:nth-child(3){grid-column:1;grid-row:2;}
  table.items-table td:nth-child(4){grid-column:2;grid-row:2;}
  table.items-table td:nth-child(5){grid-column:1;grid-row:3;}
  table.items-table td:nth-child(6){grid-column:2;grid-row:3;}
  table.items-table td.amt{grid-column:1;grid-row:4;text-align:left;padding-top:4px;font-size:16px;font-weight:700;align-self:end;}
  table.items-table td.rm{grid-column:2;grid-row:4;text-align:right;padding-top:4px;align-self:end;}
  table.items-table input{width:100%;}
  .rm-btn{font-size:20px;padding:6px 10px;}
  .add-row-btn{width:100%;justify-content:center;}
  .totals-mini{justify-content:stretch;}
  .totals-mini table{width:100%;min-width:0;}

  /* Saved Bills / Customers / Customer Detail lists — scroll sideways instead of squishing columns unreadably small */
  #recentBillsWrap,#savedBillsWrap,#customersWrap,#custDetailBillsWrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -16px;padding:0 16px;width:calc(100% + 32px);}
  table.list-table{min-width:540px;}
  table.list-table th,table.list-table td{white-space:nowrap;}
  table.list-table td.muted{white-space:normal;max-width:160px;}

  .cust-detail-info{gap:18px;padding-bottom:14px;margin-bottom:14px;}
  .cust-detail-stats{gap:24px;}
  .cust-detail-stats .num{font-size:20px;}

  #billDocument{width:100%;min-width:600px;}
  .preview-shell{padding:14px;}
  .preview-toolbar{flex-direction:column;align-items:stretch;}
  .preview-toolbar .btn-row{justify-content:stretch;}
  .preview-toolbar .btn-row .btn{flex:1;}
}