:root{
  --bg:#f5f4f1;--panel:#fff;--ink:#171716;--muted:#74716c;--line:#e7e4de;
  --accent:#8b6844;--accent2:#f2ebe3;--dark:#211f1b;--good:#2f7d57;
  --warn:#b7792f;--danger:#a1463f;--shadow:0 10px 30px rgba(30,26,20,.06)
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
button,input,select{font:inherit}
button{cursor:pointer}
.app-shell{min-height:100vh;display:grid;grid-template-columns:235px 1fr}
.sidebar{height:100vh;position:sticky;top:0;background:var(--dark);color:#fff;padding:20px 14px;display:flex;flex-direction:column}
.brand{display:flex;gap:11px;align-items:center;padding:3px 8px 24px}
.brand-mark{width:40px;height:40px;border-radius:12px;background:#fff;color:var(--dark);display:grid;place-items:center;font-weight:800}
.brand-name{font-weight:800}.brand-sub{font-size:11px;opacity:.55;margin-top:2px}
.nav{display:flex;flex-direction:column;gap:5px}
.nav-item{border:0;background:transparent;color:#d0ccc5;padding:11px;border-radius:10px;text-align:left;display:flex;gap:11px;align-items:center}
.nav-item.active,.nav-item:hover{background:rgba(255,255,255,.1);color:white}
.icon{width:20px;text-align:center}
.sidebar-bottom{margin-top:auto}
.user-card{display:flex;gap:9px;align-items:center;border-top:1px solid rgba(255,255,255,.1);padding:17px 7px 0}
.avatar{width:36px;height:36px;border-radius:50%;background:#b6926e;display:grid;place-items:center;font-weight:800}
.user-card small{display:block;color:#aaa49b;margin-top:2px}
.main{min-width:0}
.topbar{height:76px;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:10}
.crumb{font-size:11px;color:var(--muted)}.page-title{font-size:18px;font-weight:800;margin-top:3px}
.topbar-actions{display:flex;gap:8px}
.select,.secondary-btn,.primary-btn{height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;padding:0 13px}
.primary-btn{background:var(--dark);color:#fff;border-color:var(--dark);font-weight:700}
.secondary-btn{font-weight:650}
.big{height:48px}
.menu-btn{display:none;border:0;background:transparent;font-size:22px}
.register-layout{padding:18px;display:grid;grid-template-columns:minmax(0,1.55fr) minmax(320px,.75fr);gap:16px;max-width:1550px;margin:0 auto}
.left-column,.right-column{display:flex;flex-direction:column;gap:16px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:18px}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:15px}
.panel-head.compact{margin-bottom:12px}
.panel h2{font-size:16px;margin:0 0 3px}.panel p{font-size:12px;color:var(--muted);margin:0}
.live-badge{font-size:10px;letter-spacing:.08em;background:#edf7f1;color:var(--good);padding:6px 8px;border-radius:999px;font-weight:800}
.scan-row{display:grid;grid-template-columns:1fr auto;gap:9px}
.scan-input{height:50px;border:1px solid #d9d5ce;border-radius:11px;padding:0 15px;font-size:17px;outline:none}
.scan-input:focus{border-color:#9d7a58;box-shadow:0 0 0 3px rgba(139,104,68,.12)}
.sample-row{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.chip{border:1px solid var(--line);background:#faf9f7;border-radius:999px;padding:7px 10px;font-size:11px}
.cart-count{font-size:12px;color:var(--muted)}
.empty-state{padding:48px 15px;text-align:center;color:var(--muted)}
.empty-icon{font-size:28px;margin-bottom:10px}.empty-state b,.empty-state span{display:block}.empty-state span{font-size:12px;margin-top:4px}
.cart-list{display:flex;flex-direction:column;gap:9px}
.cart-item{border:1px solid var(--line);border-radius:13px;padding:13px;display:grid;grid-template-columns:1fr auto;gap:12px}
.item-title{font-weight:800;font-size:14px}.item-meta{color:var(--muted);font-size:11px;margin-top:4px}
.serial-pill{display:inline-block;margin-top:7px;background:#f3f1ed;border-radius:7px;padding:5px 7px;font-size:10px}
.item-controls{grid-column:1/-1;display:grid;grid-template-columns:90px 1fr 1fr 85px auto;gap:7px;align-items:end;padding-top:9px;border-top:1px solid var(--line)}
.item-controls label{font-size:10px;color:var(--muted)}
.item-controls input,.item-controls select{display:block;width:100%;margin-top:4px;height:34px;border:1px solid var(--line);border-radius:8px;padding:0 8px;background:#fff}
.remove-btn{height:34px;border:1px solid #ead6d4;background:#fff7f6;color:var(--danger);border-radius:8px;padding:0 10px}
.line-total{text-align:right;font-weight:800}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.field-grid label{font-size:11px;color:var(--muted)}
.field-grid label.full{grid-column:1/-1}.field-grid label span{font-size:10px}
.field-grid input{display:block;width:100%;height:40px;margin-top:5px;border:1px solid var(--line);border-radius:9px;padding:0 10px}
.link-btn{border:0;background:transparent;color:var(--accent);font-weight:750}
.customer-status{margin-top:10px;border-radius:9px;background:#f7f5f1;padding:9px 10px;font-size:11px;color:var(--muted)}
.customer-status.required{background:#fff4ed;color:#a45d25}
.summary-row{display:flex;justify-content:space-between;padding:8px 0;font-size:13px}
.summary-row.grand{border-top:1px solid var(--line);margin-top:6px;padding-top:14px;font-size:18px}
.payment-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.pay-method{height:38px;border:1px solid var(--line);background:#fff;border-radius:9px;font-size:11px;font-weight:650}
.pay-method.active{background:var(--accent2);border-color:#cdb79f;color:#6f4f31}
.split-row{display:grid;grid-template-columns:1fr auto;gap:7px;margin-top:10px}
.split-row input{height:40px;border:1px solid var(--line);border-radius:9px;padding:0 10px}
.payments-list{margin-top:8px;display:flex;flex-direction:column;gap:5px}
.payment-entry{display:flex;justify-content:space-between;background:#f7f6f3;border-radius:8px;padding:8px 9px;font-size:11px}
.balance-row{display:flex;justify-content:space-between;padding:13px 0 10px;border-top:1px solid var(--line);margin-top:9px}
.checkout-btn,.reserve-btn{width:100%;height:48px;margin-top:8px}
.reserve-btn{height:42px}
.toast{position:fixed;right:18px;bottom:18px;background:var(--dark);color:#fff;padding:12px 15px;border-radius:10px;opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s;z-index:100}
.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:1050px){
  .register-layout{grid-template-columns:1fr}.right-column{display:grid;grid-template-columns:1fr 1fr;align-items:start}.payment-panel{grid-column:1/-1}
}
@media(max-width:760px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:fixed;left:-255px;width:235px;z-index:40;transition:.2s}.sidebar.open{left:0;box-shadow:20px 0 50px rgba(0,0,0,.25)}
  .menu-btn{display:block}.topbar{padding:0 12px}.topbar-left{margin-right:auto;margin-left:9px}
  .topbar-actions .select{display:none}
  .register-layout{padding:10px}.right-column{display:flex}
  .item-controls{grid-template-columns:1fr 1fr}.remove-btn{grid-column:2}
}
@media(max-width:450px){
  .topbar-actions #holdBtn{display:none}.field-grid{grid-template-columns:1fr}.field-grid label.full{grid-column:auto}
  .payment-grid{grid-template-columns:1fr 1fr}.scan-row{grid-template-columns:1fr auto}
}