/* ==========================================================================
   DISEÑO SISTEMA DE FERRETERÍA - ESTILOS PREMIUM (MODO OSCURO / CLARO INCLUIDO)
   ========================================================================== */

/* CONFIGURACIÓN Y VARIABLES DEL DISEÑO */
:root {
    --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* MODO OSCURO (Predeterminado) */
    --bg-primary: #0b111e;
    --bg-secondary: #131c2e;
    --bg-tertiary: #1b263b;
    --card-bg: rgba(30, 41, 59, 0.6);
    --card-border: rgba(255, 255, 255, 0.05);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-primary: #1e3a8a; /* Azul Marino */
    --color-primary-light: #2563eb;
    
    --color-accent: #f97316; /* Naranja Ferretería */
    --color-accent-hover: #ea580c;
    
    --color-success: #10b981; /* Verde esmeralda */
    --color-danger: #ef4444; /* Rojo coral */
    --color-warning: #f59e0b; /* Amarillo/Ámbar */
    --color-info: #06b6d4; /* Turquesa */
    
    --glass-blur: blur(12px);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s ease;
    
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    --sidebar-width: 250px;
    --header-height: 80px;
}

/* PALETA MODO CLARO */
[data-theme="light"] {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(0, 0, 0, 0.06);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    
    --color-accent: #f97316;
    --color-accent-hover: #ea580c;
    
    --card-shadow: 0 4px 20px 0 rgba(148, 163, 184, 0.12);
}

/* RESET GENERAL Y TIPOGRAFÍA */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* SCROLLBAR PERSONALIZADA */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* LAYOUT PRINCIPAL CONTENEDOR */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* SIDEBAR NAVEGACIÓN LATERAL */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    z-index: 10;
    transition: width 0.3s ease;
    flex-shrink: 0;
}

.sidebar-brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--card-border);
}

.brand-icon {
    font-size: 24px;
    color: var(--color-accent);
    animation: rotateSlow 8s linear infinite;
}

.brand-text h2 {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.brand-text span {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
}

.sidebar-menu {
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.menu-item {
    background: none;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 14px 16px;
    text-align: left;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition-fast);
}

.menu-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: var(--color-primary);
    color: white;
}

[data-theme="light"] .menu-item.active {
    background-color: var(--color-primary);
    color: white;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--card-border);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background-color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
}

.user-info strong {
    display: block;
    font-size: 13px;
    color: var(--text-primary);
}

.user-info span {
    font-size: 11px;
    color: var(--text-muted);
}

/* CONTENIDO PRINCIPAL */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* HEADER SUPERIOR */
.main-header {
    height: var(--header-height);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    flex-shrink: 0;
    transition: background-color 0.3s ease;
}

.header-title h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.header-title span {
    font-size: 13px;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Reloj y Alertas */
.clock-display {
    background-color: var(--bg-primary);
    padding: 10px 16px;
    border-radius: var(--border-radius-md);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    border: 1px solid var(--card-border);
}

.stock-alerts-indicator {
    position: relative;
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    width: 42px;
    height: 42px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 16px;
    border: 1px solid rgba(239, 68, 68, 0.2);
    transition: var(--transition-fast);
}

.stock-alerts-indicator:hover {
    background-color: rgba(239, 68, 68, 0.2);
    transform: translateY(-2px);
}

.stock-alerts-indicator .badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--color-danger);
    color: white;
    font-size: 10px;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--card-border);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    width: 42px;
    height: 42px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    transform: scale(1.05);
}

/* CONTENEDOR DINÁMICO */
.tab-content-container {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
    background-color: var(--bg-primary);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-pane.active {
    display: block;
}

/* COMPONENTES CARD GLASSMORPHISM */
.card {
    background-color: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

/* GRID DEL PUNTO DE VENTA (POS) */
.pos-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
    height: calc(100vh - 200px);
    overflow: hidden;
}

.pos-left-panel, .pos-right-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.pos-search-bar {
    position: relative;
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.pos-search-bar input {
    width: 100%;
    padding: 16px 20px 16px 48px;
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 500;
    outline: none;
    transition: var(--transition-fast);
}

.pos-search-bar input:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.pos-search-bar .search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
}

/* Resultados predictivos del POS */
.pos-search-results {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    max-height: 250px;
    overflow-y: auto;
    position: absolute;
    top: 58px;
    left: 0;
    right: 70px;
    z-index: 100;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    display: none;
}

.result-item {
    padding: 12px 18px;
    border-bottom: 1px solid var(--card-border);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

.result-item:hover {
    background-color: var(--bg-tertiary);
}

.result-item .item-info strong {
    display: block;
    font-size: 14px;
    color: var(--text-primary);
}

.result-item .item-info span {
    font-size: 11px;
    color: var(--text-muted);
}

.result-item .item-price {
    font-weight: 700;
    color: var(--color-accent);
    font-size: 15px;
}

.result-item .item-stock-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
}

/* Catálogo Rápido (Favoritos) */
.pos-quick-catalog {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 4px;
}

.pos-quick-catalog h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.quick-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 14px;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 120px;
}

.quick-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.15);
}

.quick-card strong {
    font-size: 12px;
    line-height: 1.4;
    display: block;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.quick-card span {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-accent);
    margin-top: 8px;
    display: block;
}

.quick-card .stock-small {
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* CARRITO DE COMPRAS */
.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 16px;
    margin-bottom: 16px;
    flex-shrink: 0;
}

.cart-header h2 {
    font-size: 16px;
    font-weight: 700;
}

.cart-table-wrapper {
    flex-grow: 1;
    overflow-y: auto;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--card-border);
}

/* TABLAS ESTILO MODERNO */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.table th {
    text-align: left;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.01);
    border-bottom: 1px solid var(--card-border);
}

.table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--card-border);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.text-accent { color: var(--color-accent) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-success { color: var(--color-success) !important; }
.text-primary { color: var(--color-primary-light) !important; }

/* Badges / Etiquetas de Estado */
.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}
.badge-secondary {
    background-color: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
    border: 1px solid rgba(148, 163, 184, 0.3);
}


/* Controles de Cantidad en el Carrito */
.qty-control {
    display: inline-flex;
    align-items: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-sm);
    padding: 2px;
}

.qty-btn {
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-size: 11px;
    transition: var(--transition-fast);
}

.qty-btn:hover {
    background-color: var(--bg-tertiary);
}

.qty-value {
    width: 32px;
    text-align: center;
    font-weight: 700;
    font-size: 13px;
}

.empty-cart-row {
    height: 200px;
}

.empty-cart-icon {
    font-size: 40px;
    color: var(--text-muted);
    margin-bottom: 16px;
    opacity: 0.5;
}

/* TOTALES Y CONFIRMACIÓN DE VENTA */
.cart-totals {
    flex-shrink: 0;
}

.cart-customer-selector, .cart-payment-method {
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.cart-customer-selector label, .cart-payment-method label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.form-select {
    width: 65%;
    padding: 8px 12px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-sm);
    outline: none;
    font-family: var(--font-primary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.form-select:focus {
    border-color: var(--color-primary-light);
}

.cc-warning-box {
    background-color: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 10px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-danger);
    font-weight: 600;
}

.pos-cash-input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    background-color: rgba(255, 255, 255, 0.01);
    padding: 12px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--card-border);
}

.pos-cash-input-group .form-group {
    flex: 1;
}

.form-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-sm);
    outline: none;
    font-family: var(--font-primary);
    font-size: 14px;
}

.form-control.text-large {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-accent);
}

.vuelto-display {
    padding: 10px 14px;
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-sm);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-success);
}

.grand-total-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.03);
    padding: 16px;
    border-radius: var(--border-radius-md);
    margin-bottom: 16px;
    border: 1px solid var(--card-border);
}

.grand-total-box span:first-child {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
}

.grand-total-box span:last-child {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-accent);
}

/* Descuento en el POS */
.cart-discount {
    margin-bottom: 10px;
}
.cart-discount > label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}
.cart-discount-inputs {
    display: flex;
    gap: 8px;
}
.cart-discount-inputs select { flex: 1.4; }
.cart-discount-inputs input { flex: 1; min-width: 0; }

.cart-resumen {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.cart-resumen div {
    display: flex;
    justify-content: space-between;
    padding: 2px 4px;
}

/* BOTONES */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background-color: var(--bg-primary);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background-color: var(--color-danger);
    color: white;
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-info {
    background-color: rgba(6, 182, 212, 0.15);
    color: var(--color-info);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.btn-info:hover {
    background-color: var(--color-info);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 4px;
}

.btn-large {
    padding: 16px 24px;
    font-size: 16px;
    border-radius: var(--border-radius-md);
}

.btn-block {
    width: 100%;
}

/* Acciones secundarias del POS (presupuesto / imprimir ticket) bajo el botón de venta */
.pos-secondary-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

/* PANTALLA INVENTARIO Y EXCEL */
.inventario-controls {
    margin-bottom: 24px;
}

.search-filters {
    display: flex;
    align-items: center;
    gap: 16px;
}

.filter-search {
    position: relative;
    flex-grow: 1;
    margin-bottom: 0;
}

.filter-search input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    outline: none;
}

.filter-search .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* Área Drag & Drop Excel */
.excel-integration-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
    border-top: 1px solid var(--card-border);
    padding-top: 20px;
    align-items: stretch;
}

/* Tarjeta apilada (vertical) para el convertidor y la vista previa, a diferencia de
   .excel-card que es horizontal (ícono + texto + botón en fila). */
.panel-card {
    background-color: rgba(16, 185, 129, 0.04);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 20px;
}

.panel-card > h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.panel-card > p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

/* Filas del convertidor: campos sin el margen inferior que descuadra al envolver. */
.convertidor-fila .form-group {
    margin-bottom: 0;
}
.convertidor-fila .form-control {
    width: 100%;
}

.excel-card {
    flex-grow: 1;
    background-color: rgba(16, 185, 129, 0.04);
    border: 2px dashed rgba(16, 185, 129, 0.25);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 18px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.excel-card:hover, .excel-card.dragover {
    background-color: rgba(16, 185, 129, 0.08);
    border-color: var(--color-success);
}

.excel-icon {
    font-size: 32px;
    color: var(--color-success);
}

.excel-text h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.excel-text p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.excel-actions {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px;
    flex-shrink: 0;
}

.catalog-table-container {
    overflow-x: auto;
}

/* Fila especial si tiene Alerta de Stock */
.row-alert-stock {
    background-color: rgba(239, 68, 68, 0.04);
}

.row-alert-stock:hover {
    background-color: rgba(239, 68, 68, 0.08) !important;
}

.row-alert-stock td:nth-child(6) {
    color: var(--color-danger);
    font-weight: 700;
}

/* Insignias de Categoría o Proveedores */
.badge-category {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

/* SECCIÓN CLIENTES Y TARJETAS */
.clientes-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 24px;
    height: calc(100vh - 150px);
    overflow: hidden;
}

.clientes-list-panel, .cc-details-panel {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 16px;
    flex-shrink: 0;
}

.panel-header-actions h2 {
    font-size: 16px;
    font-weight: 700;
}

.clients-cards-container {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-right: 4px;
}

.client-card-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 16px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

.client-card-item:hover {
    border-color: var(--color-primary-light);
    transform: translateX(3px);
}

.client-card-item.selected {
    background-color: var(--bg-tertiary);
    border-color: var(--color-primary-light);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.15);
}

.client-card-info h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.client-card-info span {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

.client-card-balance {
    text-align: right;
}

.client-card-balance span {
    display: block;
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.client-card-balance strong {
    font-size: 14px;
    font-weight: 700;
}

/* Ficha de Detalles de CC */
.empty-state-cc {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
}

.empty-state-cc i {
    font-size: 56px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state-cc h3 {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 8px;
}

.cc-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.cc-client-header {
    display: flex;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 20px;
    flex-shrink: 0;
}

.client-badge-large {
    width: 48px;
    height: 48px;
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-light);
    font-size: 20px;
    border: 1px solid var(--card-border);
}

.client-meta h2 {
    font-size: 16px;
    font-weight: 700;
}

.client-meta span {
    font-size: 12px;
    color: var(--text-secondary);
}

.cc-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.metric-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.metric-card .icon {
    font-size: 20px;
    color: var(--text-muted);
}

.metric-card.outstanding .icon {
    color: var(--color-danger);
}

.metric-info span {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

.metric-info strong {
    font-size: 18px;
    font-weight: 700;
}

.cc-actions-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 12px;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.cc-actions-bar h3 {
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.cc-history-table-wrapper {
    flex-grow: 1;
    overflow-y: auto;
}

/* REPORTES Y ESTADÍSTICAS */
.reportes-dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.report-metric-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--card-shadow);
}

.report-metric-card .icon {
    font-size: 24px;
    width: 48px;
    height: 48px;
    background-color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.report-metric-card.color-blue .icon { color: var(--color-info); background-color: rgba(6, 182, 212, 0.1); }
.report-metric-card.color-green .icon { color: var(--color-success); background-color: rgba(16, 185, 129, 0.1); }
.report-metric-card.color-orange .icon { color: var(--color-warning); background-color: rgba(245, 158, 11, 0.1); }
.report-metric-card.color-red .icon { color: var(--color-danger); background-color: rgba(239, 68, 68, 0.1); }

.reportes-charts-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 24px;
}

.chart-container h3 {
    font-size: 14px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

/* Gráfico de Barras con CSS */
.chart-wrapper-bars {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 220px;
    padding-top: 20px;
    border-bottom: 2px solid var(--card-border);
    border-left: 2px solid var(--card-border);
    padding-left: 10px;
}

.chart-bar-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 50px;
    height: 100%;
    justify-content: flex-end;
}

.chart-bar {
    width: 28px;
    background-color: var(--color-primary-light);
    border-radius: 4px 4px 0 0;
    transition: height 0.5s ease-out;
    position: relative;
}

.chart-bar:hover {
    background-color: var(--color-accent);
}

.chart-bar-value {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
}

.chart-bar-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 600;
}

/* Lista de Productos más vendidos */
.top-products-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.top-product-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.top-product-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
}

.top-product-meta strong {
    color: var(--text-primary);
}

.top-product-meta span {
    color: var(--text-muted);
    font-weight: 600;
}

.top-product-bar-bg {
    height: 8px;
    background-color: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
}

.top-product-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    border-radius: 4px;
    width: 0%;
    transition: width 0.6s ease;
}

/* MODALES Y DIÁLOGOS DE INTERFAZ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    width: 500px;
    max-width: 90vw;
    display: flex;
    flex-direction: column;
    animation: zoomIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-card.modal-large {
    width: 800px;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.btn-close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* FORMULARIOS INTERNOS MODALES */
.form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.w-50 { width: 50%; }
.w-25 { width: 25%; }

.form-group {
    margin-bottom: 16px;
}

.cc-payment-info-banner {
    background-color: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--border-radius-md);
    padding: 16px;
    text-align: center;
}

.cc-payment-info-banner span {
    font-size: 12px;
    color: var(--text-secondary);
    display: block;
}

.cc-payment-info-banner strong {
    font-size: 18px;
    color: var(--text-primary);
    margin-top: 6px;
    display: block;
}

.cc-payment-info-banner .debt-warning {
    margin-top: 10px;
    font-size: 13px;
    color: var(--color-danger);
}

.alerts-table-container {
    max-height: 400px;
    overflow-y: auto;
}

/* NOTIFICACIONES TOAST */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 9999;
}

.toast {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-left: 4px solid var(--color-primary-light);
    border-radius: var(--border-radius-sm);
    padding: 14px 20px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 250px;
    animation: slideInRight 0.3s ease;
    transition: var(--transition-fast);
}

.toast.success { border-left-color: var(--color-success); }
.toast.danger { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-warning); }

/* ANIMACIONES */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes rotateSlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   ESTILOS DE IMPRESIÓN PARA TICKETS PDF
   ========================================================================== */
#print-receipt-section {
    display: none;
}

@media print {
    body * {
        visibility: hidden;
    }
    
    #print-receipt-section, #print-receipt-section * {
        visibility: visible;
    }
    
    #print-receipt-section {
        display: block;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        color: #000;
        background-color: #fff;
    }
    
    /* Configurar factura en papel */
    .invoice-card {
        box-shadow: none !important;
        padding: 0 !important;
        border: none !important;
        width: 100%;
        max-width: 100% !important;
    }
    
    .btn-print-container {
        display: none !important;
    }
}

/* ==========================================================================
   AGREGADOS DE AUTENTICACIÓN (LOGIN)
   ========================================================================== */

.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #0b111e 0%, #172554 100%); /* Fondo degradado azul profundo */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    padding: 20px;
    transition: opacity 0.3s ease;
}

.login-card {
    background: rgba(30, 41, 59, 0.45);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    width: 420px;
    max-width: 100%;
    padding: 40px;
    display: flex;
    flex-direction: column;
    animation: zoomIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-brand {
    text-align: center;
    margin-bottom: 30px;
}

.login-icon {
    font-size: 38px;
    color: var(--color-accent);
    margin-bottom: 12px;
    animation: rotateSlow 15s linear infinite;
}

.login-brand h1 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.login-brand span {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.btn-toggle-password {
    position: absolute;
    right: 14px;
    bottom: 10px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition-fast);
}

.btn-toggle-password:hover {
    color: var(--text-primary);
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* BOTÓN DE LOGOUT EN EL SIDEBAR FOOTER */
.btn-logout {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-logout:hover {
    color: var(--color-danger);
    background-color: rgba(239, 68, 68, 0.1);
    transform: scale(1.1);
}

/* EFECTO DE ERROR (SACUDIDA) */
.shake {
    animation: shakeEffect 0.4s ease-in-out;
}

@keyframes shakeEffect {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

/* ==========================================================================
   AGREGADOS DE GESTIÓN DE CAJA (ARQUEOS)
   ========================================================================== */

.caja-status-banner {
    width: 100%;
    margin-bottom: 20px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.caja-status-banner.closed {
    background-color: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.caja-status-banner.open {
    background-color: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

/* RESUMEN ARQUEO EN MODAL CIERRE */
.cierre-caja-resumen-box {
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15);
}

.cierre-item {
    display: flex;
    justify-content: space-between;
    font-size: 13.5px;
    color: var(--text-secondary);
}

.cierre-divider {
    border-top: 1px solid var(--card-border);
    margin: 4px 0;
}

.cierre-item.expected-total {
    font-size: 15px;
    font-weight: 800;
    color: var(--text-primary);
}

.cierre-other-payments {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
    border-top: 1px dashed var(--card-border);
    padding-top: 12px;
}

.cierre-sub-item {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.cierre-sub-item span {
    font-weight: 700;
    color: var(--text-secondary);
}

/* Interruptor para ocultar TODO lo relacionado a stock mientras no se controla.
   Para reactivar el control de stock: quitar la clase "sin-control-stock" del <body>
   (en app.js, flag CONTROL_STOCK) o borrar esta regla. */
body.sin-control-stock .stock-ui {
    display: none !important;
}

/* ============================================================
   RESPONSIVE / MÓVIL
   ============================================================ */

/* Hamburguesa y overlay: ocultos en escritorio */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 22px;
    cursor: pointer;
    padding: 6px 10px;
    margin-right: 4px;
}
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
}
.sidebar-overlay.show { display: block; }

@media (max-width: 820px) {
    /* Mostrar hamburguesa */
    .menu-toggle { display: inline-flex; align-items: center; }

    /* Sidebar como cajón deslizante */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 80%;
        max-width: 300px;
        transform: translateX(-100%);
        z-index: 100;
        box-shadow: 2px 0 18px rgba(0, 0, 0, 0.35);
    }
    .sidebar.open { transform: translateX(0); }

    .main-header { padding: 0 16px; }
    #page-title { font-size: 17px; }
    #page-subtitle { font-size: 11px; }
    .tab-content-container { padding: 16px 14px; }

    /* POS en una sola columna */
    .pos-grid {
        grid-template-columns: 1fr;
        height: auto;
        overflow: visible;
        gap: 16px;
    }
    .pos-left-panel, .pos-right-panel {
        height: auto;
        overflow: visible;
    }
    .cart-table-wrapper { max-height: 50vh; }

    /* Tablas de catálogo/reportes: scroll horizontal en vez de aplastarse.
       Acotado a .catalog-table-container para NO forzar ancho a la tabla del carrito. */
    .catalog-table-container { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .catalog-table-container .table { min-width: 600px; }
    .table th, .table td { padding: 10px 8px; font-size: 13px; }

    /* Carrito del POS: scroll a lo ancho dentro del panel si hace falta */
    .cart-table-wrapper { overflow-x: auto; }

    /* Efectivo recibido / Vuelto: apilados en móvil */
    .pos-cash-input-group { flex-direction: column; gap: 8px; }

    /* Formularios apilados */
    .form-row { flex-direction: column; gap: 0; }
    .w-25, .w-50 { width: 100%; }

    /* Convertidor de listas: cada campo ocupa toda la fila */
    .convertidor-fila .form-group { flex-basis: 100%; min-width: 0; }

    /* Paneles con cabecera + botón: que el botón baje y no se corte */
    .panel-header-actions { flex-wrap: wrap; gap: 10px; }

    /* Modales más amplios en móvil */
    .modal-card { width: 95%; max-width: 95%; max-height: 92vh; }
    .modal-card.modal-large { width: 95%; max-width: 95%; }
}

@media (max-width: 480px) {
    .clock-display { display: none; }            /* el reloj ocupa lugar en pantallas chicas */
    .grand-total-box span:last-child { font-size: 24px; }
    .header-actions { gap: 8px; }
    .main-header { height: auto; padding: 10px 14px; flex-wrap: wrap; }
}