/* ========================================
   EL REY DEL HUEVO - Sistema POS
   Estilos principales - Tema Oscuro
   ======================================== */

:root {
    /* Colores principales */
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --primary-light: #fbbf24;
    
    /* Colores de fondo */
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --bg-hover: #475569;
    
    /* Colores de texto */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Colores de estado */
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    
    /* Bordes */
    --border-color: #334155;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    
    /* Transiciones */
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* ========================================
   Utilidades generales
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* ========================================
   Página de Login
   ======================================== */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a2e 100%);
    padding: 1rem;
}

.login-box {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.login-logo .logo-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.login-logo p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Formularios
   ======================================== */

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* ========================================
   Botones
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: #000;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
}

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

.btn-success:hover:not(:disabled) {
    background: #16a34a;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-warning {
    background: var(--warning);
    color: #000;
}

.btn-info {
    background: var(--info);
    color: #fff;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    padding: 0.5rem;
    min-width: 38px;
    height: 38px;
}

/* ========================================
   Layout - Sidebar
   ======================================== */

.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.sidebar-header h1 {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 700;
}

.sidebar-header .logo-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
    overflow-y: auto;
}

.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
    flex-shrink: 0;
}

/* ========================================
   Layout - Main Content
   ======================================== */

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem;
    transition: var(--transition);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
}

.page-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ========================================
   Cards
   ======================================== */

.card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

/* ========================================
   Stats Cards (Dashboard)
   ======================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.sales { background: var(--success-bg); color: var(--success); }
.stat-icon.expenses { background: var(--danger-bg); color: var(--danger); }
.stat-icon.profit { background: var(--warning-bg); color: var(--warning); }
.stat-icon.inventory { background: var(--info-bg); color: var(--info); }

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Tablas
   ======================================== */

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

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: rgba(0, 0, 0, 0.2);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background: rgba(245, 158, 11, 0.05);
}

.table-actions {
    display: flex;
    gap: 0.5rem;
}

/* ========================================
   Modales
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ========================================
   Alertas y Notificaciones
   ======================================== */

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid var(--info);
}

/* Toast notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    min-width: 300px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-weight: 700;
    border: 1px solid var(--border-color);
}

.toast.alert-success {
    background: #166534;
    border-color: var(--success);
    color: #fff;
}

.toast.alert-danger {
    background: #991b1b;
    border-color: var(--danger);
    color: #fff;
}

.toast.alert-warning {
    background: #92400e;
    border-color: var(--warning);
    color: #fff;
}

.toast.alert-info {
    background: #1e40af;
    border-color: var(--info);
    color: #fff;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ========================================
   Filtros
   ======================================== */

.filters-bar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.filter-group .form-control {
    width: auto;
    min-width: 150px;
}

/* ========================================
   Badges
   ======================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

.badge-primary {
    background: rgba(245, 158, 11, 0.15);
    color: var(--primary);
}

.badge-secondary {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

/* ========================================
   POS Styles
   ======================================== */

.pos-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 1.5rem;
    height: calc(100vh - 4rem);
}

.pos-products {
    overflow-y: auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.product-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.product-card.out-of-stock {
    opacity: 0.5;
    cursor: not-allowed;
}

.product-card h4 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.product-card .price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.product-card .stock {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.pos-cart {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cart-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-input);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
}

.cart-item-info h5 {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.cart-item-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.cart-item-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.qty-control {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.qty-control button {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    border: none;
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
}

.qty-control span {
    min-width: 30px;
    text-align: center;
}

.cart-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.cart-total h3 {
    font-size: 1.5rem;
}

.cart-total .amount {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

/* ========================================
   Responsive
   ======================================== */

.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 101;
    background: var(--primary);
    color: #000;
    border: none;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .pos-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .pos-cart {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 60vh;
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        transform: translateY(calc(100% - 60px));
        transition: var(--transition);
    }
    
    .pos-cart.active {
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-group .form-control {
        width: 100%;
    }
    
    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }
    
    .modal {
        max-width: 100%;
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.9rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
}

/* ========================================
   Charts Container
   ======================================== */

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
}

.chart-header {
    margin-bottom: 1rem;
}

.chart-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Loading spinner
   ======================================== */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 900;
}

.loading-overlay.active {
    display: flex;
}

/* ========================================
   Empty state
   ======================================== */

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* ========================================
   Month Selector
   ======================================== */

.month-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.month-selector select {
    width: auto;
}

/* ========================================
   Paginación
   ======================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    flex-wrap: wrap;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-right: 1rem;
}

.pagination-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-btn.active {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
}