:root{
  --primary:#0f766e;
  --primary-dark:#115e59;
  --ink:#172026;
  --muted:#667085;
  --line:#d9e2e7;
  --soft:#f5f8fa;
  --danger:#b42318;
  --warn:#b54708;
  --ok:#087443;
  --card:#fff;
  --shadow:0 16px 40px rgba(15,23,42,.10);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:#eef4f5}
button,input,select,textarea{font:inherit}
.hidden{display:none!important}
.toast{position:fixed;right:18px;top:18px;z-index:50;display:grid;gap:8px}
.toast div{background:#102a43;color:white;padding:12px 14px;border-radius:8px;box-shadow:var(--shadow);max-width:360px}
.toast .error{background:var(--danger)}
.btn,.icon-btn{border:1px solid var(--line);background:white;color:var(--ink);min-height:40px;border-radius:8px;padding:9px 13px;font-weight:700;cursor:pointer}
.btn.primary{background:var(--primary);border-color:var(--primary);color:white}
.btn.dark{background:#1f2937;color:white;border-color:#1f2937}
.btn.danger{background:var(--danger);color:white;border-color:var(--danger)}
.btn.full{width:100%}
.btn.small{min-height:32px;padding:6px 10px;font-size:13px}
.icon-btn{width:42px;padding:0;font-size:20px}
.login-screen{min-height:100vh;display:grid;grid-template-columns:minmax(320px,1fr) minmax(320px,480px)}
.login-art{background:linear-gradient(140deg,#0f766e,#164e63);color:white;display:flex;flex-direction:column;justify-content:center;padding:10vw}
.login-art h1{font-size:clamp(42px,7vw,86px);line-height:.95;margin:12px 0;letter-spacing:0}
.login-panel{display:grid;place-items:center;padding:28px;background:#fff}
.login-card{width:min(390px,100%);display:grid;gap:15px}
.brand-mark{display:inline-grid;place-items:center;width:42px;height:42px;background:#facc15;color:#17302f;border-radius:8px;font-weight:900}
.brand-mark.large{width:76px;height:76px;font-size:28px}
.brand-mobile{display:flex;gap:10px;align-items:center;font-weight:900}
.eyebrow{font-size:12px;font-weight:900;color:var(--primary);letter-spacing:.08em;text-transform:uppercase;margin:0 0 4px}
.muted{color:var(--muted)}
label{display:grid;gap:6px;font-weight:700}
input,select,textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:10px 11px;background:white;min-height:42px}
textarea{min-height:86px;resize:vertical}
.app-shell{display:grid;grid-template-columns:276px minmax(0,1fr);min-height:100vh}
.sidebar{background:#0b1f24;color:white;display:flex;flex-direction:column;min-height:100vh;position:sticky;top:0}
.brand{display:flex;gap:12px;align-items:center;padding:20px;font-size:18px}
.sidebar nav{display:grid;gap:4px;padding:0 12px 12px;overflow:auto}
.sidebar nav button{border:0;background:transparent;color:#dbeafe;text-align:left;border-radius:8px;padding:12px;font-weight:800;cursor:pointer}
.sidebar nav button.active,.sidebar nav button:hover{background:rgba(255,255,255,.11);color:#fff}
.sidebar-footer{margin-top:auto;padding:14px;display:grid;grid-template-columns:42px minmax(0,1fr) 42px;gap:10px;align-items:center;border-top:1px solid rgba(255,255,255,.12)}
.avatar{width:42px;height:42px;border-radius:8px;background:#facc15;color:#17302f;display:grid;place-items:center;font-weight:900}
.sidebar-footer small{display:block;color:#b6c7d3}
.main{min-width:0}
.topbar{height:auto;min-height:76px;background:#fff;border-bottom:1px solid var(--line);display:flex;gap:14px;align-items:center;justify-content:space-between;padding:12px 20px;position:sticky;top:0;z-index:10}
.topbar h1{margin:0;font-size:26px}
.top-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.status-chip,.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;background:#e6f4f1;color:#115e59;padding:7px 10px;font-weight:800;font-size:13px}
.badge.warn{background:#fff4e5;color:var(--warn)} .badge.danger{background:#fee4e2;color:var(--danger)} .badge.ok{background:#dcfae6;color:var(--ok)}
.content{padding:20px;display:grid;gap:18px}
.grid{display:grid;gap:14px}.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.panel,.metric,.table-wrap{background:var(--card);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
.panel{padding:16px}.panel-head,.view-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}
.metric{padding:16px}.metric strong{font-size:30px;display:block}.metric span{color:var(--muted);font-weight:700}
.toolbar{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.toolbar input,.toolbar select{max-width:240px}
table{width:100%;border-collapse:collapse} th,td{padding:11px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top} th{font-size:12px;text-transform:uppercase;color:#475467;background:#f8fafc}
.table-wrap{overflow:auto}
.empty,.loading{padding:24px;text-align:center;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.span-2{grid-column:span 2}.check{display:flex;gap:8px;align-items:center}.check input{width:auto;min-height:auto}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:14px}
dialog{border:0;padding:0;background:transparent;width:min(880px,calc(100vw - 24px))}
dialog::backdrop{background:rgba(15,23,42,.55)}
.modal-card{background:white;border-radius:8px;box-shadow:var(--shadow);max-height:86vh;overflow:auto}
.modal-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;padding:16px;border-bottom:1px solid var(--line)}
#modal-body{padding:16px}
.pos-layout{display:grid;grid-template-columns:minmax(0,1fr) 430px;gap:16px;align-items:start}
.scan-box{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:10px}
.product-tile{background:white;border:1px solid var(--line);border-radius:8px;padding:10px;text-align:left;display:grid;gap:8px;min-height:132px}
.product-tile img{width:100%;aspect-ratio:1.6;object-fit:cover;border-radius:6px;background:#e5e7eb}
.cart-line{display:grid;grid-template-columns:minmax(0,1fr) 92px 36px;gap:8px;align-items:center;border-bottom:1px solid var(--line);padding:10px 0}
.cart-line strong{display:block}.qty-box{display:flex;gap:4px}.qty-box button{min-width:36px}
.totals{display:grid;gap:6px;margin-top:12px}.totals div{display:flex;justify-content:space-between}.totals .grand{font-size:24px;font-weight:900;border-top:1px solid var(--line);padding-top:8px}
.pay-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.alert-list{display:grid;gap:8px}.alert-item{padding:10px;border:1px solid var(--line);border-left:5px solid var(--warn);border-radius:8px;background:white}
.kbd{border:1px solid var(--line);background:#f8fafc;border-radius:6px;padding:2px 6px;font-weight:800}
@media (max-width:1100px){.pos-layout{grid-template-columns:1fr}.grid.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:820px){
  .login-screen{grid-template-columns:1fr}.login-art{display:none}
  .app-shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:min(310px,88vw);z-index:30;transform:translateX(-105%);transition:.18s}.sidebar.open{transform:none}
  .topbar{align-items:flex-start}.content{padding:12px}.grid.cols-2,.grid.cols-3,.grid.cols-4,.form-grid{grid-template-columns:1fr}.span-2{grid-column:auto}
  .panel-head,.view-head{display:grid}.toolbar input,.toolbar select{max-width:none}.top-actions{justify-content:flex-end}
}