:root{
  --op-brown:#59372A; --op-brown-dark:#3f2620; --op-brown-light:#7a4f3c;
  --op-cream:#fff8f0; --op-accent:#F59C36; --op-bg:#f7f4f1; --op-text:#2b211d;
  --op-card:#ffffff; --op-border:#ece3da;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--op-bg);color:var(--op-text);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px;
  display:flex;flex-direction:column;min-height:100vh;
}
main.container-fluid{flex:1 0 auto;padding:1.25rem 1rem}
h1,h2,h3,h4,h5,h6{font-weight:600;letter-spacing:-.01em}
.navbar.op-nav{background:linear-gradient(135deg,var(--op-brown-dark),var(--op-brown))!important;box-shadow:0 4px 18px rgba(63,38,32,.18);padding:.6rem 1rem}
.navbar.op-nav .navbar-brand{font-weight:700;font-size:1.05rem;color:#fff}
.navbar.op-nav .navbar-brand img{border-radius:8px;background:#fff;padding:2px}
.navbar.op-nav .nav-link{color:rgba(255,255,255,.88)!important;font-weight:500;border-radius:8px;padding:.45rem .85rem;margin:0 2px;transition:all .15s}
.navbar.op-nav .nav-link:hover{background:rgba(255,255,255,.15);color:#fff!important}
.navbar.op-nav .nav-link.active{background:rgba(255,255,255,.22);color:#fff!important;box-shadow:inset 0 -2px 0 var(--op-accent)}
.navbar.op-nav .navbar-text{color:#fff!important;font-size:.85rem}
.op-card-header{background:linear-gradient(135deg,var(--op-brown-dark),var(--op-brown))}
.op-selected{background:var(--op-accent)!important;color:#3f2620!important}
.card{border:0;border-radius:14px;box-shadow:0 2px 12px rgba(43,25,18,.06);background:var(--op-card);overflow:visible}
.card .card-header,.card>h6:first-child{background:transparent;border-bottom:1px solid var(--op-border);font-weight:600}
.card.p-3>h6{padding-bottom:.75rem;border-bottom:1px solid var(--op-border);margin:-.25rem -.25rem 1rem;padding:0 .25rem .75rem;color:var(--op-brown-dark)}
.btn{border-radius:9px;font-weight:500;padding:.5rem 1.05rem;transition:all .15s}
.btn-primary,.btn-success{background:linear-gradient(135deg,var(--op-brown),var(--op-accent));border:0;color:#fff}
.btn-primary:hover,.btn-success:hover{background:var(--op-brown-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(89,55,42,.25);color:#fff}
.btn-outline-primary{color:var(--op-brown);border-color:var(--op-brown)}
.btn-outline-primary:hover{background:var(--op-brown);border-color:var(--op-brown);color:#fff}
.btn-outline-warning{color:#a15b00;border-color:var(--op-accent)}
.btn-outline-warning:hover{background:var(--op-accent);border-color:var(--op-accent);color:#3f2620}
.btn-warning{background:var(--op-accent);border-color:var(--op-accent);color:#3f2620}
.btn-check:checked+.btn-outline-primary{background:var(--op-brown);color:#fff}
.btn-check:checked+.btn-outline-warning{background:var(--op-accent);color:#3f2620}
a{color:var(--op-brown);text-decoration:none}
a:hover{color:var(--op-brown-dark);text-decoration:underline}
label{font-size:.82rem;font-weight:500;color:#5c4a40;margin-bottom:.25rem}
.form-control,.form-select{border-radius:9px;border:1px solid #e2d5c8;padding:.5rem .75rem;background:#fff;transition:all .15s}
.form-control:focus,.form-select:focus{border-color:var(--op-brown);box-shadow:0 0 0 3px rgba(89,55,42,.15);position:relative;z-index:1000}
.form-control-sm,.form-select-sm{border-radius:7px;font-size:.85rem}
.table{font-size:.92rem;margin-bottom:0}
.table thead th{background:#f5ece1;color:#3f2620;font-weight:600;border-bottom:0;text-transform:uppercase;font-size:.7rem;letter-spacing:.05em;padding:.65rem .75rem;white-space:nowrap}
.table tbody td{padding:.6rem .75rem;vertical-align:middle;border-color:#f3ece4}
.table tbody tr:hover{background:#fbf7f2}
.table-responsive{border-radius:10px;overflow:auto}
.badge{font-weight:500;padding:.4em .7em;border-radius:6px;font-size:.72rem;letter-spacing:.02em}
.badge.bg-success{background:#eee6de!important;color:#59372A!important}
.badge.bg-warning{background:#fff1dc!important;color:#a15b00!important}
.badge.bg-danger{background:#fdecec!important;color:#a8231d!important}
.alert{border-radius:11px;border:0;padding:.75rem 1rem}
.alert-success{background:#eee6de;color:#3f2620}
.alert-danger{background:#fdecec;color:#a8231d}
.alert-warning{background:#fff1dc;color:#a15b00}
.alert-info{background:#e3f0fd;color:#0d47a1}
.stat-card{border-radius:14px;padding:18px;background:#fff;border-left:4px solid var(--op-brown);transition:transform .15s,box-shadow .15s;box-shadow:0 2px 10px rgba(43,25,18,.05)}
.stat-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(43,25,18,.1)}
.stat-card .stat-label{font-size:.78rem;text-transform:uppercase;color:#7a675c;letter-spacing:.04em;font-weight:500}
.stat-card .stat-value{font-size:1.6rem;font-weight:700;color:var(--op-text);margin-top:6px;letter-spacing:-.02em}
.stat-card.success{border-color:#28a745}.stat-card.warning{border-color:var(--op-accent)}
.stat-card.danger{border-color:#dc3545}.stat-card.info{border-color:#0dcaf0}
.stat-card.secondary{border-color:#6c757d}.stat-card.advance{border-color:#2e9e5b}
.page-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 1.1rem;padding:0;gap:10px;flex-wrap:wrap}
.page-title h3{margin:0;font-size:1.4rem;color:var(--op-brown-dark)}
.app-footer{flex-shrink:0;text-align:center;padding:18px 10px;color:#7a675c;font-size:.82rem;border-top:1px solid var(--op-border);background:#fff}
.app-footer b{color:var(--op-brown)}
.login-wrap{flex:1;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#fff1dc,#fff8f0);padding:20px}
.login-card{width:100%;max-width:420px;background:#fff;border-radius:18px;padding:36px 30px;box-shadow:0 14px 50px rgba(63,38,32,.18)}
.login-card .brand{text-align:center;margin-bottom:22px}
.login-card .brand img{max-width:100%;height:auto;max-height:100px}
.login-card .brand .tag{color:#7a675c;font-size:.85rem;margin-top:8px}
.invoice-box{max-width:900px;margin:20px auto;background:#fff;padding:32px;border-radius:14px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.invoice-box table{width:100%;border-collapse:collapse}
.invoice-box th,.invoice-box td{border:1px solid #ded0c3;padding:8px 10px;font-size:13px}
.invoice-box th{background:#f5ece1;color:#3f2620}
.invoice-header{display:flex;align-items:center;gap:18px;border-bottom:3px solid var(--op-brown);padding-bottom:14px;margin-bottom:18px}
.invoice-header img{height:80px;border-radius:10px}
.invoice-header h2{color:var(--op-brown-dark);margin:0}
.row{overflow:visible!important}
[class*="col-"]{overflow:visible!important}
.form-select{position:relative}
.form-select[multiple]:focus{overflow:visible!important}
.card.p-3:has(> h6:first-child){padding:1.5rem!important;min-height:auto}
.card.p-3 > .row{gap:1rem}
@media (max-width: 768px){
  .navbar.op-nav .navbar-brand{font-size:.95rem}
  .stat-card .stat-value{font-size:1.25rem}
  .page-title{flex-direction:column;align-items:flex-start}
  .invoice-box{padding:18px;margin:10px}
  .invoice-header{flex-direction:column;text-align:center;gap:10px}
  .invoice-header img{height:64px}
  .table{font-size:.82rem}
  .table thead th{font-size:.65rem;padding:.4rem}
  main.container-fluid{padding-left:12px;padding-right:12px}
  h3{font-size:1.2rem}
}
@media print{
  .no-print,.navbar,.app-footer{display:none!important}
  body{background:#fff}
  .invoice-box{border:0;box-shadow:none;margin:0;padding:0;max-width:100%}
}