:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Sidebar */
.sidebar {
    height: 100vh;
    background: linear-gradient(180deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    transition: all 0.3s;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-brand {
    padding: 20px;
    font-size: 1.3rem;
    font-weight: bold;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: 10px;
}

.sidebar-footer {
    padding: 15px;
    flex-shrink: 0;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Scroll personalizado para el sidebar */
.sidebar-menu::-webkit-scrollbar {
    width: 6px;
}

.sidebar-menu::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.4);
    border-radius: 3px;
}

.sidebar-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.6);
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 20px;
    border-radius: 8px;
    margin: 5px 10px;
    transition: all 0.3s;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.sidebar .nav-link i {
    margin-right: 10px;
    width: 20px;
}

.sidebar-brand {
    padding: 20px;
    font-size: 1.3rem;
    font-weight: bold;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Main content */
.main-content {
    margin-left: 250px;
    padding: 20px;
    transition: all 0.3s;
}

/* Cards */
.stat-card {
    border-radius: 12px;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.stat-card .card-body {
    padding: 1.5rem;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

/* Tables */
.table-custom {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.table-custom thead {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
}

.table-custom tbody tr:hover {
    background: rgba(13, 110, 253, 0.05);
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 8px 20px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 0.875rem;
}

/* Forms */
.form-control,
.form-select {
    border-radius: 8px;
    border: 1px solid #dee2e6;
    padding: 10px 15px;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 500;
}

/* Product image */
.product-img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
}

.product-img-large {
    max-width: 200px;
    border-radius: 12px;
}

/* Image upload preview */
.image-preview {
    max-width: 300px;
    margin-top: 15px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Alert */
.alert {
    border-radius: 8px;
    border: none;
}

/* Modal */
.modal-content {
    border-radius: 12px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    border-radius: 12px 12px 0 0;
}

/* Navbar top */
.navbar-top {
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    padding: 12px 20px;
}

/* Search */
.search-box {
    max-width: 400px;
}

/* Stock indicators */
.stock-high {
    color: var(--success-color);
    font-weight: 600;
}

.stock-medium {
    color: var(--warning-color);
    font-weight: 600;
}

.stock-low {
    color: var(--danger-color);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        width: 250px;
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stat-card {
        margin-bottom: 15px;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
}

/* Mobile menu toggle */
.menu-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    font-size: 1.5rem;
    z-index: 999;
    display: none;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Loading spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Print styles */
@media print {
    .sidebar,
    .navbar-top,
    .btn,
    .menu-toggle {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}