:root{
  --sb-bg:#0b1220;
  --sb-fg:#e5e7eb;
  --sb-muted:#9ca3af;
}
body{background:#f6f7fb;}
.sidebar{
  background:var(--sb-bg);
  color:var(--sb-fg);
  min-height:100vh;
}
.sidebar a{color:var(--sb-fg); text-decoration:none;}
.sidebar a:hover{color:#fff; text-decoration:underline;}
.sidebar .muted{color:var(--sb-muted);}
.content{padding:18px;}
.card-kpi .kpi{font-size:1.3rem; font-weight:700;}
.table td, .table th{vertical-align:middle;}
.invoice{
  max-width:900px;
  margin:0 auto;
  background:#fff;
  padding:24px;
  border:1px solid #e5e7eb;
}
@media print{
  .no-print{display:none !important;}
  body{background:#fff;}
  .invoice{border:none; padding:0;}
}