/* =================================================================
   CSS UNIFICADO Y FINAL v4.0 - CON MODO CLARO/OSCURO AUTOMÁTICO
   ================================================================= */

/* --- 1. DEFINICIÓN DE VARIABLES PARA AMBOS TEMAS --- */
:root {
    /* Colores base */
    --primary-color: #e15d5d;
    --primary-light: #fbecec;
    --primary-dark: #c84a4a;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --border-radius: 12px;
    --transition: all 0.2s ease-in-out;
    
    /* Modo claro (default) */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --background-color: #f9fafb;
    --card-color: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --input-bg: #f9fafb;
    --kpi-card-bg: var(--card-color);
    --menu-hover-bg: #f0f0f0;
    --table-header-bg: #f9fafb;
    --table-row-hover: #f9fafb;
    --modal-backdrop: rgba(31, 41, 55, 0.6);
    --image-bg: #f0f0f0;
    --out-of-stock-bg: #f8f8f8;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Modo oscuro */
        --text-primary: #f3f4f6;
        --text-secondary: #d1d5db;
        --background-color: #121212;
        --card-color: #1e1e1e;
        --border-color: #374151;
        --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
        --input-bg: #2d2d2d;
        --kpi-card-bg: #2a2a2a;
        --menu-hover-bg: #2a2a2a;
        --table-header-bg: #2a2a2a;
        --table-row-hover: #2a2a2a;
        --modal-backdrop: rgba(0, 0, 0, 0.8);
        --image-bg: #333333;
        --out-of-stock-bg: #2a2a2a;
        
        /* Ajustes específicos para modo oscuro */
        --primary-light: #3a1a1a;
    }
}

/* --- 2. ESTILOS BASE --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.hidden { display: none !important; }
a { color: inherit; text-decoration: none; }

/* --- 3. LAYOUT PRINCIPAL --- */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 260px; background-color: var(--card-color); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; transition: var(--transition); z-index: 1000; }
.main-content { flex: 1; display: flex; flex-direction: column; overflow-y: auto; }
.main-header { display: flex; align-items: center; padding: 1.2rem 1.5rem; background-color: var(--card-color); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
.main-header h2 { margin: 0; font-size: 1.5rem; font-weight: 600; }
.content-wrapper { padding: 1.5rem; flex: 1; }
.sidebar-header { display: flex; align-items: center; padding: 1.5rem; border-bottom: 1px solid var(--border-color); }
.logo-icon { font-size: 2rem; color: var(--primary-color); }
.logo-text { font-size: 1.25rem; margin-left: 0.5rem; font-weight: 600; }
.profile { display: flex; align-items: center; padding: 1.5rem; }
.profile-avatar { width: 40px; height: 40px; border-radius: 50%; background-color: var(--primary-color); color: white; display: flex; align-items: center; justify-content: center; font-weight: 600; margin-right: 1rem; }
.profile-info { display: flex; flex-direction: column; }
.profile-name { font-weight: 600; }
.profile-role { font-size: 0.8rem; color: var(--text-secondary); }
.menu { flex: 1; margin-top: 1rem; }
.menu ul { list-style: none; }
.menu li { padding: 0.8rem 1.5rem; margin: 0.2rem 1rem; border-radius: var(--border-radius); cursor: pointer; transition: var(--transition); }
.menu li a { display: flex; align-items: center; color: var(--text-secondary); font-weight: 500; }
.menu li .material-icons { margin-right: 1rem; }
.menu li:hover { background-color: var(--menu-hover-bg); }
.menu li:hover a { color: var(--text-primary); }
.menu li.active { background-color: var(--primary-light); }
.menu li.active a { color: var(--primary-dark); font-weight: 600; }
.sidebar-footer { padding: 1.5rem; margin-top: auto; }

/* --- 4. COMPONENTES GENERALES --- */
.card { background-color: var(--card-color); border-radius: var(--border-radius); box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.5rem; }
.card h3 { margin-top: 0; margin-bottom: 1.5rem; font-size: 1.2rem; font-weight: 600; border-bottom: 1px solid var(--border-color); padding-bottom: 0.8rem; }
.btn { padding: 0.6rem 1.2rem; border: none; border-radius: 8px; cursor: pointer; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; transition: var(--transition); font-size: 0.9rem; }
.btn:hover { transform: translateY(-2px); }
.btn .material-icons { margin-right: 0.5rem; font-size: 1.1rem; }
.btn.primary { background: var(--primary-color); color: white; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.secondary { background-color: var(--border-color); color: var(--text-primary); }
.btn.secondary:hover { filter: brightness(0.9); }
.btn.danger { background-color: var(--danger-color); color: white; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: var(--text-secondary); font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea { 
    width: 100%; 
    padding: 0.75rem 1rem; 
    border: 1px solid var(--border-color); 
    border-radius: 8px; 
    font-size: 1rem; 
    transition: var(--transition); 
    background-color: var(--input-bg); 
    color: var(--text-primary);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { 
    outline: none; 
    border-color: var(--primary-color); 
    box-shadow: 0 0 0 2px var(--primary-light); 
    background-color: var(--card-color); 
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-actions { display: flex; justify-content: flex-end; gap: 0.8rem; margin-top: 1.5rem; }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.8rem 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
th { font-weight: 600; font-size: 0.85rem; color: var(--text-secondary); text-transform: uppercase; background-color: var(--table-header-bg); }
tbody tr:hover { background-color: var(--table-row-hover); }

/* --- 5. ESTILOS ESPECÍFICOS DE PÁGINAS --- */

/* Página de Login */
.login-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 1rem; background-color: var(--background-color); }
.auth-form { background: var(--card-color); padding: 2.5rem; border-radius: var(--border-radius); box-shadow: var(--shadow); width: 400px; max-width: 100%; text-align: center; }
.auth-form h2 { font-weight: 600; font-size: 1.8rem; margin-bottom: 0.5rem; }
.auth-form p { color: var(--text-secondary); margin-bottom: 2rem; }
.auth-form label { text-align: left; }
.auth-form button { width: 100%; padding: 0.8rem; font-size: 1rem; margin-top: 1rem; }

/* Dashboard */
.dashboard-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.5rem; }
.dashboard-links .card { text-decoration: none; transition: var(--transition); }
.dashboard-links .card:hover { transform: translateY(-5px); box-shadow: 0 8px 15px rgba(0,0,0,0.15); }
.dashboard-links .card h3 { display: flex; align-items: center; gap: 0.8rem; border-bottom: none; padding-bottom: 0; margin-bottom: 0.5rem; }
.dashboard-links .card h3 .material-icons { margin-right: 0; }
.dashboard-links .card p { color: var(--text-secondary); font-size: 0.9rem; }

/* Admin Users & Acciones */
.actions { display: flex; flex-wrap: wrap; gap: 5px; }
.action-btn { padding: 5px; font-size: 0.8rem; border-radius: 6px; color: white; border: none; cursor: pointer; display: flex; align-items: center; }
.action-btn .material-icons { font-size: 1rem; }
.action-btn.edit { background-color: #3498db; }
.action-btn.disable { background-color: #f39c12; }
.action-btn.enable { background-color: #2ecc71; }
.action-btn.delete { background-color: #e74c3c; }
.status-badge { padding: 3px 10px; border-radius: 12px; font-size: 0.8rem; color: white; font-weight: 500; text-transform: capitalize; }
.status-badge.status-active, .status-badge.status-debt { background-color: var(--success-color); }
.status-badge.status-inactive, .status-badge.status-payment { background-color: var(--text-secondary); }
#password-help { font-size: 0.8rem; color: var(--text-secondary); display: none; }

/* Punto de Venta (POS) */
.pos-container { display: flex; gap: 1.5rem; height: calc(100vh - 120px); }
.pos-products { flex: 3; display: flex; flex-direction: column; background-color: var(--card-color); border-radius: var(--border-radius); box-shadow: var(--shadow); overflow: hidden; }
.pos-cart { flex: 2; display: flex; flex-direction: column; background-color: var(--card-color); border-radius: var(--border-radius); box-shadow: var(--shadow); overflow: hidden; }
.pos-header { padding: 1rem; border-bottom: 1px solid var(--border-color); }
.pos-scanner-section { padding: 0 1rem 1rem 1rem; }
.search-bar { display: flex; align-items: center; background-color: var(--input-bg); border-radius: 8px; padding: 0.5rem 1rem; }
.search-bar .material-icons { color: var(--text-secondary); }
.search-bar input { border: none; background: transparent; width: 100%; margin-left: 0.5rem; font-size: 1rem; color: var(--text-primary); }
.search-bar input:focus { outline: none; }
.category-filters { display: flex; gap: 0.5rem; margin-top: 1rem; overflow-x: auto; padding-bottom: 5px; }
.category-btn { padding: 0.5rem 1rem; border-radius: 20px; background-color: var(--input-bg); color: var(--text-secondary); border: 1px solid var(--border-color); cursor: pointer; white-space: nowrap; }
.category-btn.active { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 1rem; padding: 1rem; overflow-y: auto; flex: 1; }
.product-card-pos { border: 1px solid var(--border-color); border-radius: 8px; padding: 1rem; text-align: center; cursor: pointer; transition: var(--transition); background-color: var(--card-color); }
.product-card-pos:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--primary-color); }
.product-card-pos.out-of-stock { opacity: 0.5; cursor: not-allowed; background-color: var(--out-of-stock-bg); }
.product-name-pos { font-weight: 600; font-size: 0.9rem; height: 40px; overflow: hidden; }
.product-price-pos { font-weight: 500; color: var(--primary-color); margin-top: 0.5rem; }
.cart-header { padding: 1rem; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.customer-section { padding: 0.5rem 1rem; border-bottom: 1px solid var(--border-color); }
.customer-section input { width: 100%; border: none; padding: 0.5rem 0; font-size: 1rem; background: transparent; color: var(--text-primary); }
.customer-section input:focus { outline: none; }
.cart-items { flex: 1; overflow-y: auto; padding: 0.5rem; }
.cart-item { display: flex; align-items: center; padding: 0.8rem 0.5rem; border-bottom: 1px solid var(--border-color); }
.cart-item-details { flex: 1; }
.cart-item-name { font-weight: 500; }
.cart-item-price { font-size: 0.9rem; color: var(--text-secondary); }
.cart-item-quantity { display: flex; align-items: center; gap: 0.5rem; }
.quantity-btn { border-radius: 50%; width: 28px; height: 28px; border: 1px solid var(--border-color); background: none; cursor: pointer; line-height: 1; color: var(--text-primary); }
.quantity-input { width: 50px; text-align: center; border: 1px solid var(--border-color); border-radius: 4px; padding: 2px; background-color: var(--input-bg); color: var(--text-primary); }
.cart-item-remove { background: none; border: none; color: var(--danger-color); cursor: pointer; margin-left: 0.5rem; }
.cart-empty { text-align: center; padding: 4rem 1rem; color: var(--text-secondary); }
.cart-empty .material-icons { font-size: 4rem; color: var(--border-color); }
.cart-summary { padding: 1rem; border-top: 1px solid var(--border-color); }
.summary-row { display: flex; justify-content: space-between; padding: 0.4rem 0; }
.discount-row input { border: none; text-align: right; font-size: 1rem; width: 100px; background: var(--input-bg); border-radius: 4px; padding: 0.2rem 0.5rem; color: var(--text-primary); }
.total-row { font-weight: bold; font-size: 1.5rem; color: var(--primary-color); margin-top: 0.5rem; }
.cart-actions { padding: 1rem; }
.btn-pay { width: 100%; padding: 1rem; font-size: 1.2rem; }
.btn-pay:disabled { background-color: var(--border-color); color: var(--text-secondary); cursor: not-allowed; transform: none; }
.payment-methods { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.payment-method-btn { padding: 1rem; border: 1px solid var(--border-color); border-radius: 8px; background: var(--card-color); cursor: pointer; font-size: 1rem; transition: var(--transition); color: var(--text-primary); }
.payment-method-btn:hover { border-color: var(--primary-color); color: var(--primary-color); }
.payment-method-btn.selected { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.cash-payment-section { border-top: 1px solid var(--border-color); padding-top: 1rem; }
.quick-cash { display: flex; gap: 0.5rem; margin-top: 0.5rem; flex-wrap: wrap; }
.change-due { margin-top: 1rem; font-size: 1.2rem; font-weight: bold; color: var(--success-color); text-align: center; }
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 2000; display: none; align-items: center; justify-content: center; background-color: var(--modal-backdrop); backdrop-filter: blur(5px); }
.modal-content { background-color: var(--card-color); border-radius: var(--border-radius); box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1); width: 600px; max-width: 95%; max-height: 90vh; display: flex; flex-direction: column; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-color); }
.modal-header h3, .modal-header h4, .modal-header h5 { margin: 0; font-size: 1.25rem; color: var(--text-primary); }
.modal-close { cursor: pointer; color: var(--text-secondary); }
.modal-body { overflow-y: auto; padding: 1.5rem; }

/* Reportes */
.date-filters { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center; }
.custom-range { display: flex; gap: 0.5rem; align-items: center; margin-left: auto; }
.custom-range input[type="date"] { padding: 0.5rem; border-radius: 6px; border: 1px solid var(--border-color); background-color: var(--input-bg); color: var(--text-primary); }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.5rem; margin-bottom: 1.5rem; }
.kpi-card { display: flex; align-items: center; gap: 1rem; background-color: var(--kpi-card-bg); padding: 1.5rem; border-radius: var(--border-radius); box-shadow: var(--shadow); }
.kpi-icon { font-size: 2.5rem; color: var(--primary-color); background-color: var(--primary-light); padding: 0.8rem; border-radius: 50%; }
.kpi-info { display: flex; flex-direction: column; }
.kpi-title { color: var(--text-secondary); font-size: 0.9rem; }
.kpi-value { font-size: 1.5rem; font-weight: 600; color: var(--text-primary); }
.charts-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1.5rem; margin-bottom: 1.5rem; }
.chart-container { position: relative; height: 300px; }

/* Inventario y Presupuestos */
.action-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.action-header .search-bar { flex: 1; min-width: 250px; }
.inventory-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.inventory-card {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    text-align: center; 
}
.inventory-card:hover { transform: translateY(-5px); box-shadow: 0 8px 15px rgba(0,0,0,0.15); }
.inventory-card-header { display: flex; justify-content: space-between; padding: 0.8rem 1rem; border-bottom: 1px solid var(--border-color); font-size: 0.8rem; }
.product-category { font-weight: 500; color: var(--primary-color); background-color: var(--primary-light); padding: 2px 8px; border-radius: 20px; }
.product-stock { color: var(--text-secondary); }
.product-stock.low { color: var(--danger-color); font-weight: 600; }
.inventory-card-image {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin: 0 auto 1rem auto;
    background-color: var(--image-bg);
    border-bottom: 1px solid var(--border-color);
}
.inventory-card-body {
    padding: 0 1rem;
    flex: 1;
    text-align: center;
}
.inventory-card-body .product-name { font-size: 1.1rem; font-weight: 600; margin: 0 0 0.5rem 0; color: var(--text-primary); }
.inventory-card-body .product-price { font-size: 1.3rem; font-weight: 600; color: var(--success-color); }
.inventory-card-footer { display: flex; justify-content: flex-end; padding: 0.8rem 1rem; border-top: 1px solid var(--border-color); gap: 0.5rem; }
.modal-lg { width: 800px; }
.search-container { position: relative; }
#quote-search-results { position: absolute; width: 100%; background: var(--card-color); border: 1px solid var(--border-color); border-top: none; border-radius: 0 0 8px 8px; z-index: 1001; max-height: 200px; overflow-y: auto; box-shadow: var(--shadow); }
#quote-search-results ul { list-style: none; padding: 0; margin: 0; }
#quote-search-results li { padding: 10px 15px; cursor: pointer; border-bottom: 1px solid var(--border-color); color: var(--text-primary); }
#quote-search-results li:last-child { border-bottom: none; }
#quote-search-results li:hover { background-color: var(--menu-hover-bg); }

/* --- 6. RESPONSIVE Y MENÚ MÓVIL --- */
.menu-toggle { display: none; cursor: pointer; margin-right: 1rem; padding: 0.5rem; color: var(--text-primary); }
.menu-toggle .material-icons { font-size: 28px; }
#overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: var(--modal-backdrop); z-index: 999; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
#overlay.active { opacity: 1; visibility: visible; }

@media (max-width: 992px) { 
    .pos-container { flex-direction: column; height: auto; }
    .charts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { position: fixed; left: 0; top: 0; height: 100%; transform: translateX(-100%); box-shadow: 5px 0px 15px rgba(0,0,0,0.1); }
    .sidebar.active { transform: translateX(0); }
    .menu-toggle { display: block; }
    .form-row { grid-template-columns: 1fr; }
    .date-filters { flex-direction: column; align-items: stretch; }
    .custom-range { margin-left: 0; flex-direction: column; align-items: stretch; }
}

/* --- 7. ESTILOS PARA IMÁGENES --- */
.product-card-pos {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
}
.pos-product-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    background-color: var(--image-bg);
}
.product-name-pos {
    height: auto;
    min-height: 40px;
}

#quote-search-results li {
    display: flex;
    align-items: center;
    gap: 10px;
}
.quote-search-result-image {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    background-color: var(--image-bg);
}

/* --- 8. TOGGLE DE TEMA MANUAL (OPCIONAL) --- */
.theme-toggle-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.theme-toggle-btn .material-icons {
    font-size: 24px;
    margin: 0;
}