/* ---------- RECEIPT PANEL ---------- */
  .receipt{ background:var(--warm-ticket); display:flex; flex-direction:column; position:relative; min-width:0; min-height:0; overflow:hidden; }
  .receipt-inner{ padding:26px 26px 18px; flex:1; }
  .receipt-brand{ text-align:center; padding-bottom:12px; }
  .receipt-brand img{ max-height:52px; max-width:100%; object-fit:contain; margin-bottom:6px; }
  .receipt-brand-name{ font-family:var(--font-ui); font-weight:700; font-size:16px; color:var(--paper-ink); }
  .receipt-head{
    text-align:center; font-family:var(--font-mono); font-weight:700; font-size:14px;
    letter-spacing:0.14em; color:var(--paper-ink); padding-bottom:14px; border-bottom:1px dashed var(--paper-line);
  }
  .receipt-head .date{
    display:block; font-weight:400; font-size:11px; color:var(--paper-fade);
    margin-top:4px; letter-spacing:0.05em;
  }
  .items-empty{
    text-align:center; font-family:var(--font-mono); font-size:12px;
    color:var(--paper-fade); padding:34px 10px; letter-spacing:0.04em;
  }
  .receipt-lines{ padding-top:6px; }
  .line{
    display:grid; grid-template-columns:1fr auto 22px; align-items:start; gap:10px;
    padding:9px 0; border-bottom:1px dotted var(--paper-line);
  }
  .line-name{ font-family:var(--font-ui); font-weight:600; font-size:13.5px; color:var(--paper-ink); }
  .line-meta{ font-family:var(--font-mono); font-size:11px; color:var(--paper-fade); margin-top:2px; }
  .line-qty-row{ display:flex; align-items:center; gap:6px; margin-top:4px; }
  .qty-btn{
    width:34px; height:34px; border-radius:var(--radius-sm); border:1px solid var(--paper-line);
    background:var(--paper); color:var(--paper-ink); font-family:var(--font-mono); font-weight:700;
    font-size:13px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center;
    padding:0; position:relative;
  }
  .qty-btn::after{ content:""; position:absolute; inset:-10px; }
  .qty-btn:hover{ background:var(--paper); border-color:var(--paper-fade); }
  .qty-btn:disabled{ opacity:0.45; cursor:not-allowed; }
  .qty-btn .icon{ font-size:14px; pointer-events:none; }
  .qty-val{
    font-family:var(--font-mono); font-size:11.5px; font-weight:700; color:var(--paper-ink);
    min-width:38px; text-align:center;
  }
  .qty-price{ font-family:var(--font-mono); font-size:11px; color:var(--paper-fade); margin-left:2px; }
  .line-notes{ font-family:var(--font-mono); font-size:11px; color:var(--paper-fade); margin-top:2px; }
  .line-sub{
    font-family:var(--font-mono); font-weight:700; font-size:13.5px; color:var(--paper-ink);
    white-space:nowrap; align-self:center;
  }
  .line-del{
    background:none; border:none; color:var(--maroon); font-size:16px; cursor:pointer;
    align-self:center; line-height:1; padding:3px; position:relative;
    display:inline-flex; align-items:center; justify-content:center;
  }
  .line-del::after{ content:""; position:absolute; inset:-10px; }
  .line-del:hover{ color:var(--maroon-light); }
  .receipt-total{
    display:flex; justify-content:space-between; align-items:baseline; margin-top:18px;
    padding:16px 0 18px; border-top:2px solid var(--paper-ink); font-family:var(--font-mono);
  }
  .receipt-total span:first-child{ font-size:13px; letter-spacing:0.14em; font-weight:700; }
  .receipt-total span:last-child{ font-size:28px; font-weight:700; line-height:1.1; }

  .payment-section{ margin-top:20px; padding-top:16px; border-top:1px dashed var(--paper-line); display:flex; flex-direction:column; gap:10px; }
  .payment-section .catalog-label{ color:var(--paper-fade); }
  .pay-tabs{ display:flex; gap:6px; }
  .pay-tab{
    flex:1; background:var(--paper); border:1px solid var(--paper-line); color:var(--paper-ink);
    border-radius:var(--radius-md); padding:11px 6px; min-height:var(--control-h-lg);
    display:flex; align-items:center; justify-content:center; gap:7px;
    font-family:var(--font-ui); font-size:12px; font-weight:600; letter-spacing:0.01em; cursor:pointer; text-align:center;
    transition:border-color 0.12s ease, background 0.12s ease, color 0.12s ease;
  }
  .pay-tab:hover{ border-color:var(--paper-fade); background:var(--graphite-light); }
  .pay-tab:disabled{ opacity:0.45; cursor:not-allowed; }
  .pay-tab .icon{ font-size:17px; }
  .pay-tab[data-pay="efectivo"].active{ background:var(--felt); border-color:var(--felt-light); color:#fff; }
  .pay-tab[data-pay="yape"].active{ background:var(--yape); border-color:var(--yape-light); color:#fff; }
  .pay-tab[data-pay="fiado"].active{ background:var(--fiado); border-color:var(--fiado-light); color:#fff; }

  .fiado-fields{ margin-top:10px; }
   .customer-phone-field{ margin-top:10px; }
   .customer-phone-field input, .fiado-fields input{
     padding:11px 12px; border:1px solid var(--paper-line); border-radius:var(--radius-sm);
     font-family:var(--font-ui); font-size:14px; background:var(--graphite-light); color:var(--paper-ink); outline:none; width:100%;
   }
   .customer-phone-field input:focus, .fiado-fields input:focus{ border-color:var(--felt-light); box-shadow:var(--ring-focus); }
   .customer-doc-field{ margin-top:10px; }
   .customer-doc-field label{
     display:block; font-size:12px; color:var(--paper-fade); margin-bottom:4px; letter-spacing:0.04em; text-transform:uppercase;
   }
   .customer-doc-field input, .customer-doc-field select{
     padding:10px 12px; border:1px solid var(--paper-line); border-radius:var(--radius-sm);
     font-family:var(--font-ui); font-size:14px; background:var(--graphite-light); color:var(--paper-ink); outline:none; width:100%;
   }
   .customer-doc-field input:focus, .customer-doc-field select:focus{ border-color:var(--felt-light); box-shadow:var(--ring-focus); }
   .customer-doc-field input[readonly]{ opacity:0.7; cursor:not-allowed; }
   .customer-doc-field .key-small{ margin-top:6px; }
  .paper-search{
    padding:9px 10px; border:1px solid var(--paper-line); border-radius:var(--radius-sm);
    font-family:var(--font-ui); font-size:13px; background:var(--graphite-light); color:var(--paper-ink);
    outline:none; width:100%; margin-bottom:12px;
  }
  .paper-search:focus{ border-color:var(--felt-light); box-shadow:var(--ring-focus); }
  .paper-search::placeholder{ color:var(--paper-fade); }
  .admin-client{
    display:flex; justify-content:space-between; align-items:center; gap:10px;
    padding:10px 0; border-bottom:1px dotted var(--paper-line);
  }
  .admin-client-status{
    font-family:var(--font-mono); font-size:10px; padding:2px 8px; border-radius:var(--radius-md);
    display:inline-block; margin-left:8px;
  }
  .admin-client-status.activo{ background:var(--felt); color:#fff; }
  .fiado-fields label, .customer-phone-field label{
    display:block; margin-bottom:4px;
  }
  .yape-note{
    margin-top:10px; background:var(--color-info-bg); border:1px solid var(--color-info-border); color:var(--color-info-text);
    border-radius:var(--radius-md); padding:11px 12px; font-family:var(--font-ui); font-size:12.5px; line-height:1.5;
    display:flex; align-items:flex-start; gap:8px;
  }
  .yape-note .icon{ font-size:17px; flex-shrink:0; margin-top:1px; }

  .cash-calc{
    margin-top:12px; padding-top:12px; border-top:1px dashed var(--paper-line);
    display:flex; flex-direction:column; gap:8px;
  }
  .cash-calc .field-row{ display:flex; justify-content:space-between; align-items:center; gap:10px; }
  .cash-calc label{
    font-family:var(--font-mono); font-size:11px; letter-spacing:0.1em;
    color:var(--paper-fade); text-transform:uppercase;
  }
  .cash-calc input{
    width:150px; text-align:right; font-family:var(--font-mono); font-size:17px;
    font-weight:700; padding:11px 12px; border:1px solid var(--paper-line); border-radius:var(--radius-sm); background:var(--graphite-light); color:var(--paper-ink); outline:none;
  }
  .cash-calc input:focus{ border-color:var(--felt-light); box-shadow:var(--ring-focus); }
  @media (max-width:480px){
    .cash-calc input{ width:132px; font-size:16px; }
  }
  .change-row{
    display:flex; justify-content:space-between; align-items:center; font-family:var(--font-mono);
    font-size:17px; font-weight:700; letter-spacing:0.04em; color:var(--felt);
    padding:10px 12px; border-radius:var(--radius-sm);
    background:var(--color-success-bg); border:1px solid var(--color-success-border);
  }
  .change-row span:first-child{ font-size:11px; letter-spacing:0.1em; }
  .change-row.negative{ color:var(--color-error); background:var(--color-error-bg); border-color:var(--color-error-border); }
  .cash-shortcuts{ display:flex; flex-wrap:wrap; gap:6px; }
  .cash-shortcut{
    flex:1 1 calc(33.333% - 6px); min-width:0; min-height:46px;
    background:var(--paper); border:1px solid var(--paper-line); border-radius:var(--radius-sm);
    color:var(--paper-ink); font-family:var(--font-mono); font-weight:700;
    font-size:12.5px; letter-spacing:0.02em; cursor:pointer; padding:8px 6px;
  }
  .cash-shortcut:hover{ border-color:var(--paper-fade); background:var(--graphite-light); }
  .cash-shortcut:active{ filter:brightness(0.93); }
  .cash-shortcut:disabled{ opacity:0.45; cursor:not-allowed; }
  .cash-shortcut-exact{
    color:var(--felt); border-color:var(--felt);
  }
  .cash-shortcut-exact:hover{ background:var(--color-success-bg); border-color:var(--felt-light); color:var(--felt); }
  .key-checkout{
    background:var(--felt); color:#fff; width:100%; margin-top:18px; padding:14px;
    min-height:var(--control-h-lg); display:flex; align-items:center; justify-content:center; gap:8px;
    border:none; border-radius:var(--radius-md); font-family:var(--font-mono); font-weight:700;
    font-size:14px; letter-spacing:0.1em; cursor:pointer;
    box-shadow:var(--shadow-sm);
    transition:background 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
  }
  .key-checkout:hover:not(:disabled){ background:var(--felt-light); }
  .key-checkout:disabled{ opacity:0.4; cursor:not-allowed; box-shadow:none; }
  .key-checkout.pay-fiado{ background:var(--fiado); }
  .key-checkout.pay-fiado:hover:not(:disabled){ background:var(--fiado-light); }
  .key-checkout.pay-yape{ background:var(--yape); }
  .key-checkout.pay-yape:hover:not(:disabled){ background:var(--yape-light); }
  .whatsapp-row{ margin-top:10px; display:flex; flex-direction:column; gap:8px; }
  .key-whatsapp{
    background:var(--paper); color:var(--graphite); border:1px solid var(--paper-fade); border-radius:var(--radius-md);
    padding:11px; min-height:var(--control-h-md);
    font-family:var(--font-mono); font-weight:700; font-size:13px; letter-spacing:0.06em; cursor:pointer;
    display:flex; align-items:center; justify-content:center; gap:8px;
  }
  .key-whatsapp:hover:not(:disabled){ background:var(--paper); border-color:var(--graphite-light); }
  .key-whatsapp:disabled{ opacity:0.4; cursor:not-allowed; }
  .key-whatsapp .icon{ color:var(--color-whatsapp); }
  #downloadTicketImg{ background:var(--graphite); }
  #downloadTicketImg:hover:not(:disabled){ background:var(--graphite-hover); }

  /* ---------- ticket: zona principal / más opciones ---------- */
  .ticket-primary{ display:flex; flex-direction:column; }
  .ticket-options-toggle{
    margin-top:14px; width:100%; padding:8px 10px;
    background:var(--paper); border:1px solid var(--paper-line); border-radius:var(--radius-md);
    color:var(--paper-fade); font-family:var(--font-mono); font-size:11px;
    letter-spacing:0.06em; cursor:pointer; text-align:center;
    min-height:40px; display:inline-flex; align-items:center; justify-content:center; gap:6px;
  }
  .ticket-options-toggle:hover{ border-color:var(--paper-fade); color:var(--paper-ink); }
  .ticket-options-toggle:disabled{ opacity:0.45; cursor:not-allowed; }
  .ticket-options{
    margin-top:10px; padding-top:12px; border-top:1px dashed var(--paper-line);
    display:flex; flex-direction:column; gap:8px;
  }
   .ticket-options .customer-phone-field, .ticket-options .customer-doc-field, .ticket-options .whatsapp-row{ margin-top:0; }
  .tear{
    height:14px;
    background:
      linear-gradient(135deg, var(--warm-ticket) 50%, transparent 50%) 0 0/14px 14px,
      linear-gradient(225deg, var(--warm-ticket) 50%, transparent 50%) 0 0/14px 14px;
    background-repeat:repeat-x; background-position:left bottom;
  }
  @media (max-width:640px){
    .receipt-total span:last-child{ font-size:26px; }
  }

  /* ---------- F2: ticket estilo POS (pantalla CAJA) — UX/3 ---------- */
  #pageCaja .receipt{ height:100%; min-height:0; background:var(--color-surface); }
  #pageCaja .receipt-inner{
    display:flex; flex-direction:column; height:100%; min-height:0;
    padding:var(--space-4) var(--space-5) var(--space-4);
  }
  @media (max-width:980px){
    #pageCaja .receipt{
      height:calc(100dvh - 144px); min-height:0; flex:0 0 auto;
    }
  }
  #pageCaja .receipt-head{
    display:flex; align-items:flex-start; justify-content:space-between; gap:var(--space-3);
    padding-bottom:var(--space-3); margin-bottom:var(--space-2);
    border-bottom:1px solid var(--color-border);
  }
  #pageCaja .receipt-head-title{
    font-family:var(--font-mono); font-weight:700; font-size:var(--font-sm);
    letter-spacing:0.12em; text-transform:uppercase; color:var(--color-electric-blue); margin:0;
  }
  #pageCaja .receipt-head .date{ margin-top:2px; letter-spacing:0.05em; color:var(--color-text-muted); font-size:var(--font-xs); }
  #pageCaja .receipt-total-chip{
    display:flex; align-items:baseline; gap:var(--space-2); flex-shrink:0;
    background:var(--color-surface-hover); border:1px solid var(--color-border); border-radius:var(--radius-sm);
    padding:var(--space-1) var(--space-3);
  }
  #pageCaja .receipt-total-chip-label{
    font-family:var(--font-mono); font-size:var(--font-xs); letter-spacing:0.1em;
    color:var(--color-text-muted); font-weight:700; text-transform:uppercase;
  }
  #pageCaja .receipt-total-chip-value{
    font-family:var(--font-mono); font-weight:700; font-size:var(--font-xl); color:var(--color-electric-blue);
    white-space:nowrap;
  }
  #pageCaja .ticket-primary{ flex:1; min-height:0; display:flex; flex-direction:column; }
  #pageCaja #itemsWrap{
    flex:1; min-height:0; overflow:hidden; display:flex; flex-direction:column;
    --ticket-cols:minmax(0,1fr) 74px 110px 76px 34px;
  }
  @media (max-width:980px){
    #pageCaja #itemsWrap{ --ticket-cols:minmax(0,1fr) 62px 100px 66px 30px; }
  }
  @media (max-width:480px){
    #pageCaja #itemsWrap{ --ticket-cols:minmax(0,1fr) 56px 88px 60px 26px; }
  }

  #pageCaja .ticket-lines-head{
    flex-shrink:0; display:grid; grid-template-columns:var(--ticket-cols); gap:5px;
    padding:0 0 var(--space-2); border-bottom:1px solid var(--color-border);
    font-family:var(--font-mono); font-size:var(--font-xs); letter-spacing:0.08em;
    text-transform:uppercase; color:var(--color-text-muted); font-weight:700;
  }
  #pageCaja .ticket-lines-head span:nth-child(1){ grid-column:1; }
  #pageCaja .ticket-lines-head span:nth-child(2){ grid-column:2; text-align:right; }
  #pageCaja .ticket-lines-head span:nth-child(3){ grid-column:3; text-align:center; }
  #pageCaja .ticket-lines-head span:nth-child(4){ grid-column:4; text-align:right; }
  #pageCaja .ticket-lines-head span:nth-child(5){ grid-column:5; }
  #pageCaja .ticket-lines-head span{
    min-width:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }

  #pageCaja .receipt-lines{ padding-top:0; }
  #pageCaja #itemsList{ flex:1; min-height:0; max-width:100%; overflow-y:auto; overflow-x:hidden; }

  #pageCaja .line{
    display:grid; grid-template-columns:var(--ticket-cols);
    align-items:center; gap:var(--space-2); padding:var(--space-2) 0; min-width:0; max-width:100%;
  }
  #pageCaja .line-info{ grid-column:1; min-width:0; display:flex; flex-direction:column; gap:2px; }
  #pageCaja .line-name{
    font-family:var(--font-ui); font-size:var(--font-sm); font-weight:600; color:var(--color-text-primary);
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  #pageCaja .line-meta{ font-family:var(--font-mono); font-size:var(--font-xs); color:var(--color-text-muted); }
  #pageCaja .line-unit{
    grid-column:2; font-family:var(--font-mono); font-size:var(--font-sm); color:var(--color-text-muted);
    white-space:nowrap; text-align:right; min-width:0;
  }
  #pageCaja .line-qty{
    grid-column:3; display:flex; flex-direction:row; flex-wrap:nowrap;
    align-items:center; justify-content:flex-end; gap:var(--space-1); min-width:0;
  }
  #pageCaja .line-qty .qty-btn{
    width:36px; height:36px; flex:none; min-width:36px;
    background:var(--color-surface); color:var(--color-text-primary); border:1px solid var(--color-border);
    border-radius:var(--radius-sm); font-family:var(--font-mono); font-weight:700; font-size:var(--font-sm);
    cursor:pointer; display:flex; align-items:center; justify-content:center;
    transition:background var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
  }
  #pageCaja .line-qty .qty-btn:hover{ border-color:var(--color-electric-blue); background:var(--color-surface-hover); }
  #pageCaja .line-qty .qty-btn:active{ transform:translateY(1px); }
  #pageCaja .line-qty .qty-btn:disabled{ opacity:0.45; cursor:not-allowed; }
  #pageCaja .line-qty .qty-btn .icon{ font-size:14px; pointer-events:none; }
  #pageCaja .line-qty .qty-val{
    min-width:36px; font-family:var(--font-mono); font-size:var(--font-base); font-weight:700;
    color:var(--color-text-primary); text-align:center; white-space:nowrap; flex:none;
  }
  #pageCaja .line-total{ grid-column:4; text-align:right; min-width:0; }
  #pageCaja .line-sub{ font-family:var(--font-mono); font-size:var(--font-base); font-weight:700; color:var(--color-text-primary); white-space:nowrap; }
  #pageCaja .line-del{ grid-column:5; width:36px; min-width:36px; height:36px; display:flex; align-items:center; justify-content:center; }
  #pageCaja .line-del .icon{ color:var(--color-text-muted); font-size:18px; }
  #pageCaja .line-del:hover .icon{ color:var(--color-error); }
  #pageCaja .line-del:active .icon{ transform:scale(0.95); }

  #pageCaja .items-empty{
    flex:1; display:flex; flex-direction:column; align-items:center;
    justify-content:center; text-align:center; gap:var(--space-3); padding:var(--space-6) var(--space-4);
    color:var(--color-text-muted); font-family:var(--font-ui);
  }
  #pageCaja .items-empty-icon{
    font-size:32px; line-height:1; width:72px; height:72px; border-radius:var(--radius-lg);
    background:var(--color-surface-hover); border:1px dashed var(--color-border);
    display:flex; align-items:center; justify-content:center; color:var(--color-text-muted); margin-bottom:var(--space-1);
  }
  #pageCaja .items-empty-title{
    font-family:var(--font-mono); font-weight:700; font-size:var(--font-sm);
    letter-spacing:0.1em; text-transform:uppercase; color:var(--color-text-primary);
  }
  #pageCaja .items-empty-sub{ font-size:var(--font-sm); line-height:1.6; max-width:260px; }

  #pageCaja .receipt-total{
    margin-top:var(--space-4); padding:var(--space-4) var(--space-5);
    background:var(--color-bg-secondary); border:1px solid var(--color-border);
    border-radius:var(--radius-lg); border-top:3px solid var(--color-electric-blue);
    box-shadow:var(--shadow-md);
    display:flex; justify-content:space-between; align-items:baseline; gap:var(--space-3);
    font-family:var(--font-mono);
  }
  #pageCaja .receipt-total span:first-child{
    font-size:var(--font-sm); letter-spacing:0.12em; font-weight:700; color:var(--color-text-muted);
    text-transform:uppercase;
  }
  #pageCaja .receipt-total span:last-child{
    font-size:var(--font-display); font-weight:700; line-height:1.1; color:var(--color-electric-blue);
  }

  #pageCaja .payment-section{ margin-top:var(--space-4); padding-top:var(--space-3); border-top:1px solid var(--color-border); display:flex; flex-direction:column; gap:var(--space-3); }
  #pageCaja .payment-section .catalog-label{ color:var(--color-text-muted); font-size:var(--font-xs); letter-spacing:0.08em; text-transform:uppercase; font-weight:700; }
  #pageCaja .pay-tabs{ display:flex; gap:var(--space-2); }
  #pageCaja .pay-tab{
    flex:1; background:var(--color-surface); border:1px solid var(--color-border); color:var(--color-text-primary);
    border-radius:var(--radius-md); padding:var(--space-2) var(--space-2); min-height:var(--control-h-lg);
    display:flex; align-items:center; justify-content:center; gap:var(--space-2);
    font-family:var(--font-ui); font-size:var(--font-sm); font-weight:600; letter-spacing:0.01em; cursor:pointer; text-align:center;
    transition:border-color var(--transition-normal), background var(--transition-normal), color var(--transition-normal);
  }
  #pageCaja .pay-tab:hover{ border-color:var(--color-electric-blue); background:var(--color-surface-hover); }
  #pageCaja .pay-tab:disabled{ opacity:0.45; cursor:not-allowed; }
  #pageCaja .pay-tab .icon{ font-size:18px; }
  #pageCaja .pay-tab[data-pay="efectivo"].active{ background:var(--color-success-green); border-color:var(--color-success-green); color:#fff; }
  #pageCaja .pay-tab[data-pay="yape"].active{ background:var(--color-purple); border-color:var(--color-purple); color:#fff; }
  #pageCaja .pay-tab[data-pay="plin"].active{ background:var(--color-electric-blue); border-color:var(--color-electric-blue); color:#fff; }
  #pageCaja .pay-tab[data-pay="fiado"].active{ background:var(--color-warning); border-color:var(--color-warning); color:#fff; }
  #pageCaja .receipt-total span:first-child{ font-size:13px; letter-spacing:0.14em; font-weight:700; color:var(--paper-fade); }
  #pageCaja .receipt-total span:last-child{ font-size:30px; color:var(--felt); }
  #pageCaja .payment-section{ margin-top:12px; padding-top:11px; }
  #pageCaja .pay-tab{ min-height:var(--control-h-lg); font-size:12px; }
  #pageCaja .key-checkout{
    background:var(--color-electric-blue); color:#fff; width:100%; margin-top:var(--space-4); padding:var(--space-3) var(--space-4);
    min-height:var(--control-h-lg); display:flex; align-items:center; justify-content:center; gap:var(--space-2);
    border:none; border-radius:var(--radius-md); font-family:var(--font-mono); font-weight:700;
    font-size:var(--font-base); letter-spacing:0.08em; cursor:pointer;
    box-shadow:var(--shadow-md);
    transition:background var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-normal);
  }
  #pageCaja .key-checkout:hover:not(:disabled){ background:var(--color-electric-blue-light); box-shadow:var(--shadow-glow-blue); transform:translateY(-1px); }
  #pageCaja .key-checkout:active:not(:disabled){ transform:translateY(0); }
  #pageCaja .key-checkout:disabled{ opacity:0.4; cursor:not-allowed; box-shadow:none; }
  #pageCaja .key-checkout.pay-fiado{ background:var(--color-warning); }
  #pageCaja .key-checkout.pay-fiado:hover:not(:disabled){ background:var(--color-warning); opacity:0.9; }
  #pageCaja .key-checkout.pay-yape{ background:var(--color-purple); }
  #pageCaja .key-checkout.pay-yape:hover:not(:disabled){ background:var(--color-purple-light); }
  #pageCaja .ticket-options-toggle{ margin-top:var(--space-3); }
  @media (max-width:560px){
    #pageCaja .line-qty .qty-btn{ width:32px; height:32px; min-width:32px; }
    #pageCaja .line-qty .qty-val{ min-width:28px; }
  }

  /* ---------- F6: jerarquía visual del ticket (CAJA) — UX/3 ---------- */
  #pageCaja .receipt-inner{ padding:var(--space-4) var(--space-5) var(--space-4); }
  #pageCaja .receipt-head{ padding-bottom:var(--space-3); }
  #pageCaja .receipt-head-title{ font-size:var(--font-sm); }
  #pageCaja .receipt-head .date{ font-size:var(--font-xs); }

  /* Estado vacío: panel punteado suave */
  #pageCaja .items-empty{
    margin:var(--space-3) 0 var(--space-2);
    border:1px dashed var(--color-border);
    border-radius:var(--radius-xl);
    background:linear-gradient(180deg, rgba(26,26,26,0.25), transparent);
    min-height:240px;
  }
  #pageCaja .items-empty-icon{
    width:84px; height:84px; font-size:36px;
    background:var(--color-surface-hover); border:1px solid var(--color-border);
    box-shadow:var(--shadow-sm); display:flex; align-items:center; justify-content:center;
  }
  #pageCaja .items-empty-title{ font-size:var(--font-base); }

  /* Total: caja con presencia y acento azul eléctrico */
  #pageCaja .receipt-total{
    margin-top:var(--space-4); padding:var(--space-4) var(--space-5);
    border-radius:var(--radius-xl);
    border-top:3px solid var(--color-electric-blue);
    box-shadow:var(--shadow-lg);
  }
  #pageCaja .receipt-total span:last-child{ font-size:var(--font-display); }

  /* Checkout button mejorado para Caja */
  #pageCaja .key-checkout{
    background:var(--color-electric-blue); color:#fff; width:100%; margin-top:var(--space-4); padding:var(--space-3) var(--space-4);
    min-height:var(--control-h-lg); display:flex; align-items:center; justify-content:center; gap:var(--space-2);
    border:none; border-radius:var(--radius-md); font-family:var(--font-mono); font-weight:700;
    font-size:var(--font-base); letter-spacing:0.08em; cursor:pointer;
    box-shadow:var(--shadow-md);
    transition:background var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-normal);
  }
  #pageCaja .key-checkout:hover:not(:disabled){ background:var(--color-electric-blue-light); box-shadow:var(--shadow-glow-blue); transform:translateY(-1px); }
  #pageCaja .key-checkout:active:not(:disabled){ transform:translateY(0); }
  #pageCaja .key-checkout:disabled{ opacity:0.4; cursor:not-allowed; box-shadow:none; }
  #pageCaja .key-checkout.pay-fiado{ background:var(--color-warning); }
  #pageCaja .key-checkout.pay-fiado:hover:not(:disabled){ background:var(--color-warning); opacity:0.9; }
  #pageCaja .key-checkout.pay-yape{ background:var(--color-purple); }
  #pageCaja .key-checkout.pay-yape:hover:not(:disabled){ background:var(--color-purple-light); }

  /* ---------- RESPONSIVE: Tablet (≤980px) ---------- */
  @media (max-width:980px){
    #pageCaja .receipt-inner{ padding:var(--space-3) var(--space-4) var(--space-3); }
    #pageCaja .receipt-head-title{ font-size:var(--font-xs); }
    #pageCaja .receipt-total-chip-value{ font-size:var(--font-lg); }
    #pageCaja .line-qty .qty-btn{ width:32px; height:32px; min-width:32px; font-size:var(--font-xs); }
    #pageCaja .line-qty .qty-val{ min-width:28px; font-size:var(--font-sm); }
    #pageCaja .line-sub{ font-size:var(--font-sm); }
    #pageCaja .line-del{ width:32px; min-width:32px; height:32px; }
    #pageCaja .items-empty{ min-height:200px; }
    #pageCaja .items-empty-icon{ width:68px; height:68px; font-size:28px; }
    #pageCaja .receipt-total{ padding:var(--space-3) var(--space-4); }
    #pageCaja .receipt-total span:last-child{ font-size:var(--font-2xl); }
    #pageCaja .key-checkout{ min-height:var(--control-h-md); font-size:var(--font-sm); padding:var(--space-2) var(--space-3); }
  }

  /* ---------- RESPONSIVE: Mobile (≤640px) ---------- */
  @media (max-width:640px){
    #pageCaja .receipt-inner{ padding:var(--space-2) var(--space-3) var(--space-2); }
    #pageCaja .receipt-head{ flex-direction:column; align-items:flex-start; gap:var(--space-1); }
    #pageCaja .receipt-head-title{ font-size:var(--font-xs); }
    #pageCaja .receipt-total-chip{ padding:var(--space-1) var(--space-2); }
    #pageCaja .receipt-total-chip-value{ font-size:var(--font-base); }
    #pageCaja .ticket-lines-head{ font-size:10px; gap:3px; }
    #pageCaja .line{ gap:var(--space-1); padding:var(--space-1) 0; }
    #pageCaja .line-name{ font-size:var(--font-xs); }
    #pageCaja .line-unit{ font-size:var(--font-xs); }
    #pageCaja .line-qty .qty-btn{ width:28px; height:28px; min-width:28px; font-size:10px; }
    #pageCaja .line-qty .qty-val{ min-width:24px; font-size:var(--font-xs); }
    #pageCaja .line-sub{ font-size:var(--font-sm); }
    #pageCaja .line-del{ width:28px; min-width:28px; height:28px; }
    #pageCaja .line-del .icon{ font-size:14px; }
    #pageCaja .items-empty{ min-height:160px; padding:var(--space-4) var(--space-2); }
    #pageCaja .items-empty-icon{ width:56px; height:56px; font-size:24px; }
    #pageCaja .items-empty-title{ font-size:var(--font-sm); }
    #pageCaja .items-empty-sub{ font-size:var(--font-xs); max-width:200px; }
    #pageCaja .receipt-total{ padding:var(--space-3) var(--space-3); margin-top:var(--space-3); }
    #pageCaja .receipt-total span:last-child{ font-size:var(--font-xl); }
    #pageCaja .key-checkout{ min-height:var(--control-h-md); font-size:var(--font-sm); padding:var(--space-2) var(--space-3); }
    #pageCaja .pay-tab{ min-height:var(--control-h-md); font-size:var(--font-xs); padding:var(--space-1) var(--space-2); }
  }

  /* ---------- B1.1: Ticket térmico 58mm ---------- */
  .thermal-ticket{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    line-height: 1.3;
    color: #000;
    background: #fff;
    max-width: 58mm;
    margin: 0 auto;
    padding: 4mm 3mm;
  }
  .thermal-ticket-58{ width: 58mm; }
  .thermal-ticket-80{ width: 80mm; }

  .thermal-ticket .ticket-header{
    text-align: center;
    margin-bottom: 3mm;
    border-bottom: 1px dashed #000;
    padding-bottom: 2mm;
  }
  .thermal-ticket .ticket-logo{
    max-height: 14mm;
    max-width: 100%;
    object-fit: contain;
    margin-bottom: 1mm;
  }
  .thermal-ticket .ticket-brand-name{
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 1mm;
  }
  .thermal-ticket .ticket-title{
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 0.1em;
    margin-bottom: 1mm;
  }
  .thermal-ticket .ticket-datetime{
    font-size: 10px;
    margin-bottom: 1mm;
  }
  .thermal-ticket .ticket-sale-id{
    font-size: 10px;
    margin-bottom: 2mm;
  }

  .thermal-ticket .ticket-items{
    margin: 2mm 0;
  }
  .thermal-ticket .ticket-item{
    margin-bottom: 2mm;
    page-break-inside: avoid;
  }
  .thermal-ticket .ticket-item-name{
    font-weight: 600;
    font-size: 11px;
    margin-bottom: 1px;
  }
  .thermal-ticket .ticket-item-note{
    font-size: 9px;
    color: #666;
  }
  .thermal-ticket .ticket-item-detail{
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    font-size: 10px;
    line-height: 1.4;
  }
  .thermal-ticket .ticket-item-qty{ font-family: 'IBM Plex Mono', monospace; }
  .thermal-ticket .ticket-item-sep{ color: #999; }
  .thermal-ticket .ticket-item-price{ font-family: 'IBM Plex Mono', monospace; }
  .thermal-ticket .ticket-item-subtotal{
    font-weight: 700;
    margin-left: auto;
  }

  .thermal-ticket .ticket-discount-row{
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    margin: 1mm 0;
    color: #666;
  }
  .thermal-ticket .ticket-discount-amount{ color: #c00; }

  .thermal-ticket .ticket-total-section{
    border-top: 2px solid #000;
    border-bottom: 1px solid #000;
    padding: 2mm 0;
    margin: 2mm 0;
  }
  .thermal-ticket .ticket-total-row{
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    font-size: 14px;
  }
  .thermal-ticket .ticket-total-label{}
  .thermal-ticket .ticket-total-amount{}

  .thermal-ticket .ticket-payments{
    margin: 2mm 0;
    font-size: 11px;
  }
  .thermal-ticket .ticket-payment-row{
    display: flex;
    justify-content: space-between;
    margin: 1mm 0;
    font-size: 11px;
  }
  .thermal-ticket .ticket-payment-method{
    text-transform: uppercase;
    font-weight: 600;
  }
  .thermal-ticket .ticket-payment-amount{}
  .thermal-ticket .ticket-operation-row{
    font-size:10px; color:var(--paper-fade); font-family:var(--font-mono);
    margin: 0 0 1mm 0; padding-left:2mm;
  }

  .thermal-ticket .ticket-cash-row,
  .thermal-ticket .ticket-change-row{
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    margin: 1mm 0;
  }
  .thermal-ticket .ticket-change-row{
    border-top: 1px dashed #000;
    padding-top: 1mm;
    font-weight: 700;
  }

  .thermal-ticket .ticket-customer-section{
    margin-top: 2mm;
    padding-top: 2mm;
    border-top: 1px dashed #000;
    font-size: 10px;
  }
  .thermal-ticket .ticket-customer-name{ font-weight: 600; }
  .thermal-ticket .ticket-customer-phone{ color: #666; }
  .thermal-ticket .ticket-customer-doc{ color: #666; font-size: 9px; }

  .thermal-ticket .ticket-footer{
    text-align: center;
    margin-top: 3mm;
    padding-top: 2mm;
    border-top: 1px dashed #000;
  }
  .thermal-ticket .ticket-thanks{
    font-weight: 600;
    font-size: 11px;
  }

  /* Ocultar todo excepto el ticket térmico al imprimir */
  @media print{
    @page {
      size: 58mm auto;
      margin: 0;
    }
    body * {
      visibility: hidden;
    }
    .thermal-ticket,
    .thermal-ticket * {
      visibility: visible;
    }
    .thermal-ticket {
      position: absolute;
      left: 0;
      top: 0;
      width: 58mm;
    }
    @page {
      size: 58mm auto;
      margin: 0;
    }
  }