/* Adaptación por espacio disponible */
@media (min-width: 1600px) {
  .pos-grid { grid-template-columns: minmax(0,1fr) 380px; }
  .sale-summary { padding: var(--space-6); }
}
@media (max-width: 1279px) {
  :root { --nav-width: 216px; --page-gutter: 22px; }
  .brand { padding: var(--space-5); }
  .brand strong { font-size: 25px; }
  .topbar-right { gap: var(--space-3); }
  .operator { padding-left: var(--space-3); }
  .operator-mark { display: none; }
  .topbar time { max-width: 150px; white-space: normal; text-align: right; }
  .metrics { gap: var(--space-3); }
  .metric { padding: var(--space-4); }
  .metric>strong { font-size: 26px; }
  .dashboard-bottom { grid-template-columns: 1fr; }
  .pos-grid { grid-template-columns: minmax(0,1fr) 310px; gap: var(--space-4); }
  .sale-summary { padding: var(--space-4); }
  .grand-total strong { font-size: 28px; }
}
@media (max-width: 1023px) {
  :root { --page-gutter: 20px; --header-size: 74px; }
  .sidebar { width: 100%; position: static; overflow: visible; border-right: 0; border-bottom: 1px solid var(--line); }
  .brand { min-height: 0; padding: 16px var(--page-gutter); display: flex; align-items: center; gap: var(--space-3); border: 0; }
  .brand strong { font-size: 24px; }
  .brand>span { font-size: 17px; }
  nav { grid-template-columns: 1fr 2fr 1.5fr; gap: var(--space-4); padding: 0 var(--page-gutter) var(--space-4); }
  .nav-group { display: grid; grid-auto-rows: min-content; grid-template-columns: minmax(0,1fr); }
  .nav-group-title { font-size: 9px; margin: 0 8px 4px; }
  .nav-group:nth-child(2) { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .nav-group:nth-child(2) .nav-group-title { grid-column: 1/-1; }
  nav a { padding: 9px 8px; font-size: var(--text-sm); gap: var(--space-2); }
  .sidebar-footer { position: absolute; right: var(--page-gutter); top: 16px; margin: 0; padding: 0; border: 0; }
  .sidebar-footer p, .sidebar-footer>span { display: none; }
  .sidebar-footer .button { width: auto; min-height: 32px; padding: 6px 8px; }
  .workspace { margin: 0; }
  #nav-toggle { display: none; }
  .topbar time { max-width: none; white-space: nowrap; }
  .operator { display: flex; border-left: 0; padding-left: 0; }
  .metrics { grid-template-columns: repeat(4,minmax(0,1fr)); }
  .metric>strong { font-size: 27px; }
  .metric-top { min-height: 36px; }
  .metric h2 { font-size: var(--text-xs); }
  .quick-actions h2 { margin-right: var(--space-2); }
  .dashboard-analysis { grid-template-columns: minmax(0,1.2fr) minmax(0,1fr); }
  .chart-layout { grid-template-columns: 70px minmax(0,1fr); gap: var(--space-2); }
  .chart-details { margin-left: 78px; }
  .pos-grid { grid-template-columns: minmax(0,1fr) 294px; }
  .sale-summary { top: calc(var(--header-size) + var(--space-4)); }
}
@media (max-width: 799px) {
  .metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .metric-top { min-height: 0; }
  .metric h2 { font-size: var(--text-sm); }
  .dashboard-analysis { grid-template-columns: minmax(0,1fr); }
  .trend, .top-panel { min-height: 0; }
  .top-products { gap: var(--space-3); }
  .payment-strip { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
  .payment-strip>div:first-child { grid-column: 1/-1; }
  .payment-stat { padding: 0; border: 0; }
  .pos-grid { grid-template-columns: minmax(0,1fr); }
  .sale-summary { position: static; }
  .quick-actions h2 { width: 100%; margin: 0 0 var(--space-1); }
  .cart-panel table { min-width: 680px; }
  .notification-panel { position: fixed; top: auto; margin-top: 12px; right: var(--page-gutter); }
}
@media (max-width: 599px) {
  :root { --page-gutter: 16px; --header-size: 106px; --control-height: 44px; }
  h1 { font-size: 25px; }
  .brand { padding-bottom: var(--space-4); }
  .brand strong { font-size: 22px; }
  .brand small { font-size: 8px; letter-spacing: .6px; }
  .sidebar-footer { top: 15px; }
  .sidebar-footer .button { width: 44px; min-width: 44px; min-height: 44px; }
  .sidebar-footer .nav-footer-label { display: none; }
  nav { grid-template-columns: 1fr 2fr 1.3fr; gap: 5px; padding: 0 var(--space-2) var(--space-3); }
  .nav-group-title { margin-left: 5px; font-size: 8px; letter-spacing: .6px; }
  nav a { flex-direction: column; align-items: center; justify-content: flex-start; text-align: center; gap: 6px; padding: 10px 2px; font-size: 9px; min-height: 62px; line-height: 1.35; }
  nav a .icon { width: 19px; height: 19px; }
  .topbar { flex-wrap: wrap; gap: var(--space-2); padding-top: 12px; padding-bottom: 12px; min-height: 0; }
  .topbar-context { flex: 1; }
  .business-context>strong { font-size: 12px; }
  .business-context>span { font-size: 10px; }
  .topbar-right { gap: var(--space-3); flex: 1 1 100%; justify-content: flex-start; }
  .topbar .operator { position: absolute; right: var(--page-gutter); top: 12px; }
  .operator>div { display: flex; align-items: center; gap: 5px; }
  .operator strong { font-size: 10px; }
  .operator small { font-size: 9px; }
  .topbar-context { padding-right: 90px; }
  .topbar time { font-size: 10px; text-align: left; order: 2; margin-left: auto; }
  .notifications { order: 3; margin-left: 0; }
  #notification-toggle { min-height: 44px; min-width: 44px; padding: 8px; }
  .demo-badge { font-size: 9px; }
  .notification-panel { right: var(--page-gutter); width: calc(100vw - 32px); max-height: min(68vh,520px); }
  .notification-heading { padding: var(--space-3); }
  .notification-list a { padding: var(--space-3); }
  .page-heading { flex-wrap: wrap; align-items: flex-start; gap: var(--space-4); margin-bottom: var(--space-5); }
  .page-heading .muted { font-size: var(--text-sm); line-height: 1.6; }
  .eyebrow { font-size: 9px; }
  .period-control { flex-direction: row; align-items: center; width: 100%; justify-content: space-between; font-size: var(--text-xs); }
  .period-control select { min-width: 160px; font-size: var(--text-sm); min-height: 40px; }
  .metrics { gap: var(--space-2); }
  .metric { padding: var(--space-4) var(--space-3); }
  .metric-top { min-height: 35px; gap: var(--space-1); margin-bottom: 10px; }
  .metric h2 { font-size: 11px; line-height: 1.5; }
  .metric .icon { width: 15px; height: 15px; margin-top: 1px; }
  .metric>strong { font-size: 27px; }
  .metric>small { font-size: 9px; line-height: 1.4; }
  .quick-actions { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); margin: var(--space-5) 0; }
  .quick-actions h2 { grid-column: 1/-1; }
  .quick-actions .button { font-size: var(--text-xs); white-space: normal; min-height: 44px; padding: 8px; }
  .quick-actions .button.primary { grid-column: 1/-1; }
  .panel { padding: var(--space-4); }
  .panel-title { gap: var(--space-2); margin-bottom: var(--space-4); }
  .panel-title h2 { font-size: 15px; }
  .panel-title>a { font-size: 11px; }
  .panel-subtitle { font-size: 10px; }
  .trend .panel-title { margin-bottom: var(--space-5); }
  .trend .badge { display: none; }
  .chart-layout { grid-template-columns: 64px minmax(0,1fr); gap: var(--space-2); }
  .chart-scale { font-size: 10px; height: 166px; padding: 0; }
  .sales-chart { height: 166px; }
  .chart-labels { font-size: 10px; margin-top: 8px; }
  .chart-labels .secondary-tick { display: none; }
  .chart-details { margin-left: 72px; }
  .top-products { gap: var(--space-4); }
  .top-item strong { font-size: var(--text-sm); }
  .payment-stat strong { font-size: 22px; }
  .payment-stat>.icon { width: 17px; height: 17px; }
  .payment-strip { margin-bottom: var(--space-5); }
  .alert-row { flex-wrap: wrap; gap: var(--space-2); }
  .alert-product { min-width: 110px; }
  .alert-row .badge { margin-left: 25px; }
  .filters { grid-template-columns: minmax(0,1fr); gap: var(--space-3); }
  .filters input, .filters select, .field input, .history-search input { font-size: 16px; }
  .searchbar { padding-left: var(--space-3); padding-right: var(--space-3); gap: var(--space-2); }
  .searchbar input { font-size: 16px; height: 46px; }
  .searchbar input::placeholder { font-size: 12px; }
  .searchbar kbd { display: none; }
  .searchbar>.icon { width: 22px; height: 22px; }
  .cart-panel { padding: var(--space-3); }
  .cart-panel table { min-width: 720px; }
  .cart-panel th, .cart-panel td { padding: 10px; }
  .quantity-control .button { min-height: 44px; min-width: 40px; }
  .quantity { min-height: 44px; width: 52px; font-size: 16px; }
  .button.compact { min-height: 44px; }
  .button.icon-button { min-height: 44px; min-width: 44px; }
  .cart-footer { gap: var(--space-2); font-size: 11px; align-items: center; }
  .cart-footer .button { padding: 8px; font-size: 10px; min-height: 40px; }
  .cart-footer .button .icon { width: 15px; height: 15px; }
  .cart-footer strong { margin-left: 8px; font-size: 17px; }
  .cart-empty { min-height: 200px; }
  .grand-total strong { font-size: 33px; }
  .sale-summary dd input { font-size: 16px; }
  .sale-summary>.field input { font-size: 18px; }
  .form-grid { grid-template-columns: minmax(0,1fr); }
  .notice { padding: var(--space-2); gap: var(--space-2); font-size: var(--text-sm); }
  .notice .button { min-height: 40px; min-width: 40px; }
  dialog { padding: var(--space-5); }
  #receipt-dialog { padding: var(--space-2); }
  .receipt-paper { padding: var(--space-4); }
  .receipt-paper table { min-width: 0; table-layout: fixed; }
  .receipt-paper th:nth-child(1) { width: 44%; }
  .receipt-paper th:nth-child(2) { width: 10%; }
  .receipt-paper th:nth-child(3), .receipt-paper th:nth-child(4) { width: 23%; }
  .receipt-actions .button { padding: 8px; font-size: var(--text-xs); }
  .page-footer { font-size: 9px; line-height: 1.7; }
}
@media (max-width: 359px) {
  :root { --page-gutter: 12px; }
  .brand small { display: none; }
  .metric>strong { font-size: 24px; }
  .metric h2 { font-size: 10px; }
  .metric .icon { display: none; }
  .panel-title { flex-wrap: wrap; }
  .topbar-right { gap: var(--space-2); }
  .topbar time { font-size: 9px; }
  .chart-layout { grid-template-columns: 58px minmax(0,1fr); }
  .chart-details { margin-left: 66px; }
  .payment-strip { gap: var(--space-3); }
  .payment-stat { gap: var(--space-2); }
  .payment-stat strong { font-size: 20px; }
}

/* Impresión: preservar el comprobante separado del commit comercial */
@media print {
  @page { size: auto; margin: 12mm; }
  :root { color-scheme: light; }
  body { background: white !important; color: black !important; }
  body>*:not(#receipt-dialog) { display: none !important; }
  #receipt-dialog { display: block !important; position: static !important; width: 100% !important; max-width: 100% !important; max-height: none !important; height: auto !important; margin: 0 !important; padding: 0 !important; border: 0 !important; box-shadow: none !important; overflow: visible !important; background: white !important; }
  #receipt-dialog::backdrop { display: none; }
  .receipt-actions { display: none !important; }
  .receipt-paper { padding: 0; overflow: visible !important; }
  .receipt-paper .table-scroll { overflow: visible; }
  .receipt-paper table { min-width: 0; }
  .receipt-paper, .receipt-paper * { color: black !important; }
  .fiscal-notice, tr { break-inside: avoid; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}