:root{
  --primary:#2563EB;--primary-dark:#1D4ED8;--accent:#059669;--accent-dark:#047857;
  --bg:#F8FAFC;--fg:#0F172A;--muted-fg:#475569;--surface:#FFFFFF;
  --muted:#F1F5FD;--border:#E4ECFC;--danger:#DC2626;--ring:#2563EB;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow-md:0 4px 16px rgba(15,23,42,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Source Sans 3',system-ui,sans-serif;font-size:16px;line-height:1.55;color:var(--fg);background:var(--bg)}
h1,h2,h3{font-family:'Lexend',system-ui,sans-serif;line-height:1.25}
a{color:var(--primary)}
:focus-visible{outline:3px solid var(--ring);outline-offset:2px;border-radius:4px}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* Topbar */
.topbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg);font-family:'Lexend',sans-serif;font-weight:600}
.brand-mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}
.topnav{display:flex;align-items:center;gap:4px}
.topnav a{text-decoration:none;color:var(--muted-fg);font-weight:500;font-size:.95rem;padding:8px 14px;border-radius:8px;cursor:pointer;transition:background .18s,color .18s}
.topnav a:hover{color:var(--primary);background:var(--muted)}
.topnav a.active{color:var(--primary);background:var(--muted)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;font-family:'Lexend',sans-serif;font-weight:500;font-size:.93rem;padding:10px 20px;border-radius:9px;text-decoration:none;cursor:pointer;border:none;min-height:42px;transition:background .18s,box-shadow .18s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark)}
.btn-outline{background:var(--surface);color:var(--fg);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-danger{background:var(--danger);color:#fff}
.btn-sm{padding:6px 12px;min-height:34px;font-size:.85rem}

/* Page */
.page{padding:34px 0 60px}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px}
.page-head h1{font-size:1.55rem;font-weight:700}
.page-head p{color:var(--muted-fg);font-size:.95rem}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:26px;margin-bottom:24px}
.card h2{font-size:1.1rem;font-weight:600;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border)}

/* Forms */
.grid{display:grid;gap:16px 20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.field label{display:block;font-weight:600;font-size:.86rem;margin-bottom:5px;color:var(--fg)}
.field label .req{color:var(--danger)}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font:inherit;font-size:.95rem;background:var(--surface);color:var(--fg);min-height:42px;transition:border-color .15s}
.field textarea{min-height:70px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.field .hint{font-size:.8rem;color:var(--muted-fg);margin-top:4px}

/* Tables */
table.data{width:100%;border-collapse:collapse;font-size:.93rem}
table.data th{background:var(--muted);text-align:left;font-family:'Lexend',sans-serif;font-weight:600;font-size:.83rem;padding:11px 12px;border-bottom:1.5px solid var(--border);white-space:nowrap}
table.data td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:top}
table.data tr:hover td{background:var(--muted)}
table.data .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.table-wrap{overflow-x:auto}

/* BOQ editor table inputs */
table.boq input,table.boq select{width:100%;padding:7px 9px;border:1.5px solid var(--border);border-radius:6px;font:inherit;font-size:.9rem;min-height:36px}
table.boq input:focus{border-color:var(--primary);outline:none}
table.boq td{padding:5px 5px;border-bottom:1px solid var(--border)}
table.boq th{background:var(--muted);font-size:.8rem;font-family:'Lexend',sans-serif;padding:9px 8px;text-align:left}
table.boq .amount{text-align:right;font-variant-numeric:tabular-nums;padding-right:10px;white-space:nowrap}

/* Status badges */
.badge{display:inline-block;font-size:.76rem;font-weight:600;padding:3px 11px;border-radius:999px;letter-spacing:.02em}
.badge.estimate{background:#F1F5F9;color:#475569}
.badge.tendered{background:#DBEAFE;color:#1D4ED8}
.badge.awarded{background:#FEF3C7;color:#B45309}
.badge.billed{background:#D1FAE5;color:#047857}

/* Alerts */
.alert{padding:13px 16px;border-radius:9px;margin-bottom:20px;font-size:.94rem;border:1px solid}
.alert-success{background:#D1FAE5;border-color:#A7F3D0;color:#065F46}
.alert-error{background:#FEE2E2;border-color:#FECACA;color:#991B1B}

/* Summary strip */
.totals{display:flex;gap:0;flex-wrap:wrap;background:var(--muted);border:1px solid var(--border);border-radius:10px;overflow:hidden;margin-top:16px}
.totals>div{flex:1;min-width:150px;padding:14px 18px;border-right:1px solid var(--border)}
.totals>div:last-child{border-right:none}
.totals b{display:block;font-family:'Lexend',sans-serif;font-size:1.15rem;color:var(--primary);font-variant-numeric:tabular-nums}
.totals span{font-size:.8rem;color:var(--muted-fg)}

.empty{text-align:center;padding:50px 20px;color:var(--muted-fg)}
.empty svg{margin-bottom:12px;opacity:.4}

@media (max-width:800px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .card{padding:18px}
}