:root{
  --primary:#1A2530;--accent:#FF6B35;--success:#2ECC71;--danger:#E74C3C;
  --warning:#F39C12;--bg:#F4F6F8;--card:#fff;--text:#22303C;--muted:#6B7A88;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);padding-bottom:calc(80px + env(safe-area-inset-bottom))}
h2{font-size:22px;margin-bottom:6px}h3{font-size:16px;margin-bottom:10px}
small{font-size:12px}hr{border:0;border-top:1px dashed #ccc;margin:10px 0}
[hidden]{display:none!important}

header{background:var(--primary);color:#fff;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:20}
header h1{font-size:20px;letter-spacing:-.5px}
.status-dot{width:12px;height:12px;border-radius:50%}
.status-dot.online{background:var(--success)}.status-dot.offline{background:var(--danger)}

#app-content{padding:18px 16px;max-width:900px;margin:0 auto}
.card{background:var(--card);border-radius:12px;padding:16px;margin-bottom:14px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.muted{color:var(--muted);font-size:13px}
.danger-text{color:var(--danger);font-weight:600;margin-bottom:6px}
.warn-text{color:#B9770E;font-weight:600;margin-bottom:6px}
.success-text{color:#1E8E5A;font-weight:600}

input,select,textarea{width:100%;padding:13px 12px;border:1px solid #D8DEE4;border-radius:9px;font-size:16px;background:#fff;color:var(--text);margin-bottom:10px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
label{display:block;font-size:13px;font-weight:600;margin-bottom:8px}
label small{font-weight:400}
button{font-family:inherit;font-size:15px;font-weight:600;border:0;border-radius:9px;padding:13px 16px;cursor:pointer;background:#E8EDF2;color:var(--text);width:auto;transition:transform .08s,opacity .15s}
button:active{transform:scale(.97)}
button:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff;width:100%;padding:16px;font-size:17px}
.btn-primary.small{width:auto;padding:11px 15px;font-size:14px}
.btn-small{padding:9px 13px;font-size:13px;background:#EDF1F5}
.btn-small.danger{background:#FDECEA;color:var(--danger)}
.link{background:none;color:var(--accent);padding:6px;font-size:13px}
.icon-btn{background:#EDF1F5;padding:8px 12px}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.row-between h2,.row-between h3{margin:0}
.empty{text-align:center;color:var(--muted);padding:26px 16px}

/* Navigation */
#bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;background:#fff;box-shadow:0 -2px 12px rgba(0,0,0,.09);z-index:30;padding-bottom:env(safe-area-inset-bottom)}
.nav-btn{flex:1;background:none;border-top:3px solid transparent;border-radius:0;padding:12px 4px;color:var(--muted);font-size:13px}
.nav-btn.active{color:var(--accent);border-top-color:var(--accent);font-weight:700}

/* Dashboard */
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:14px 0}
.stat{background:#fff;border-radius:12px;padding:14px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.stat small{display:block;color:var(--muted);margin-bottom:6px}
.stat strong{font-size:21px;letter-spacing:-.5px}
.stat.green strong{color:#1E8E5A}
.attention{border-left:4px solid var(--warning)}
.mini-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid #F0F3F6}
.mini-row:last-child{border:0}
.mini-info{flex:1;min-width:0}
.mini-info strong{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mini-info small{color:var(--muted)}
.sale-row{display:flex;justify-content:space-between;align-items:center;width:100%;background:none;text-align:left;padding:11px 0;border-bottom:1px solid #F0F3F6;border-radius:0}
.sale-row small{display:block;color:var(--muted);font-weight:400}

/* Inventory */
.toolbar{display:flex;gap:8px;margin-bottom:14px}
.toolbar input{flex:1;min-width:0}
.toolbar select{width:44%;flex:none}
.form-card{border:2px solid var(--accent)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 10px}
.form-grid label{font-size:12px}
.preview{width:90px;height:90px;object-fit:cover;border-radius:10px;margin-bottom:12px}
.item-row{display:grid;grid-template-columns:48px 1fr;gap:12px}
.thumb{object-fit:cover;border-radius:8px;flex:none;background:#F0F3F6}
.thumb.fallback{display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;color:#8795A3;background:#EAF0F5}
.item-info{min-width:0}
.item-info>strong{display:block;font-size:15px;overflow-wrap:anywhere}
.price-line{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;margin:6px 0}
.price-line b{font-size:16px;color:var(--accent)}
.price-line span{font-size:11px}
.badges{display:flex;flex-wrap:wrap;gap:5px;margin-top:6px}
.badge{font-size:11px;font-weight:700;padding:4px 7px;border-radius:6px}
.badge.red{background:#FDECEA;color:#C0392B}
.badge.orange{background:#FFF4E0;color:#B9770E}
.badge.green{background:#E8F8F0;color:#1E8E5A}
.row-actions{grid-column:2;display:flex;gap:8px}
.row-actions button{flex:1}

/* POS */
.chips{display:flex;gap:7px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:none}
.chip{white-space:nowrap;padding:9px 13px;font-size:13px;background:#fff;border:1px solid #DFE5EA}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.pos-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(105px,1fr));gap:10px;margin-bottom:16px}
.pos-item{display:flex;flex-direction:column;align-items:center;gap:5px;background:#fff;border:1px solid #E4E9EE;padding:12px 8px;text-align:center;min-height:150px}
.pos-item strong{font-size:12px;line-height:1.3;font-weight:600;overflow-wrap:anywhere}
.pos-item .price{color:var(--accent);font-size:15px;font-weight:700}
.pos-item small{color:var(--muted);font-size:10px}
.cart-panel{position:sticky;bottom:calc(66px + env(safe-area-inset-bottom));z-index:15}
.cart-line{display:flex;align-items:center;gap:8px;padding:10px 0;border-bottom:1px solid #F0F3F6}
.cart-name{flex:1;min-width:0}
.cart-name strong{display:block;font-size:13px;overflow-wrap:anywhere}
.cart-name small{color:var(--muted)}
.qty-controls{display:flex;align-items:center;gap:4px}
.qty-controls button{width:34px;height:34px;padding:0;font-size:17px;background:#EDF1F5}
.qty-controls span{min-width:22px;text-align:center;font-weight:700;font-size:14px}
.total-line{display:flex;justify-content:space-between;padding:5px 0;font-size:14px}
.total-line.grand{font-size:20px;font-weight:800;border-top:1px solid #E4E9EE;margin-top:6px;padding-top:10px}

/* Modal / payment / receipt */
dialog{border:0;border-radius:16px;padding:20px;width:calc(100% - 32px);max-width:420px;max-height:90vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(15,23,32,.6)}
.due{font-size:36px;color:var(--accent);margin:4px 0 16px;letter-spacing:-1px}
.quick-cash{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:10px 0}
.quick-cash button{padding:11px 4px;font-size:13px;background:#EDF1F5}
.change-box{background:#E8F8F0;color:#1E8E5A;padding:14px;border-radius:10px;margin:12px 0;font-size:16px}
.change-box .negative{color:var(--danger)}
.receipt{font-size:13px;max-width:80mm;margin:0 auto}
.receipt h2{text-align:center;font-size:19px}
.receipt p{text-align:center;margin:4px 0}
.receipt-row{display:flex;justify-content:space-between;gap:12px;padding:5px 0;font-size:13px}
.receipt-row span{overflow-wrap:anywhere}
.receipt-row.total{font-size:19px;font-weight:800}
.store-only{font-size:11px}

/* Toast */
.toast{position:fixed;left:50%;bottom:calc(90px + env(safe-area-inset-bottom));transform:translate(-50%,20px);background:var(--primary);color:#fff;padding:13px 18px;border-radius:10px;font-size:14px;z-index:100;opacity:0;pointer-events:none;transition:.2s;max-width:90%;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.error{background:#C0392B}

@media(max-width:360px){.form-grid{grid-template-columns:1fr}.stats-grid{gap:8px}.stat strong{font-size:18px}}

/* Thermal / A4 receipt printing: only the receipt prints, profit hidden */
@page{margin:8mm}
@media print{
  body{background:#fff;padding:0}
  body>*{display:none!important}
  #app-modal{display:block!important;position:static;open;width:100%;max-width:none;max-height:none;overflow:visible;margin:0;padding:0;border:0;border-radius:0;box-shadow:none}
  #app-modal::backdrop{display:none!important}
  .no-print,.store-only{display:none!important}
  .receipt{max-width:80mm;font-size:12px;color:#000}
}