:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --sidebar-width: 280px;
    --navbar-height: 60px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark theme variables */
.dark-theme {
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --secondary-color: #9ca3af;
    --success-color: #34d399;
    --danger-color: #f87171;
    --warning-color: #fbbf24;
    --info-color: #22d3ee;
    --background-color: #0f172a;
    --card-background: #1e293b;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.7);
}

/* Smooth transitions for theme switching */
body,
.navbar,
.sidebar,
.card,
.form-control,
.form-select,
.btn,
.table {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    margin: 0;
    padding-top: 56px;
}

/* Navbar Styles */
.navbar {
    background-color: var(--background-color);
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
    z-index: 1010;
    height: 60px;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-color);
}

/* Sidebar Styles */
.sidebar {
    width: 60px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 60px;
    background-color: var(--background-color);
    box-shadow: 1px 0 3px rgba(0,0,0,.1);
    transition: all 0.3s ease;
    z-index: 1000;
    overflow: hidden;
}

.sidebar:hover,
.sidebar.hovered {
    width: 280px;
    z-index: 999;
}

.sidebar.collapsed {
    margin-left: -60px;
}

.sidebar-menu {
    list-style: none;
    padding: 1rem 0;
    margin: 0;
}

.sidebar-menu-item {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.25rem;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    white-space: nowrap;
}

.sidebar-menu-item span {
    opacity: 0;
    transition: opacity 0.3s ease;
    margin-left: 0.75rem;
}

.sidebar:hover .sidebar-menu-item span {
    opacity: 1;
}

.sidebar-menu-item:hover {
    background-color: rgba(148, 163, 184, 0.15);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-menu-item.active {
    background-color: rgba(79, 70, 229, 0.15);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

/* Dark theme overrides */
.dark-theme .card {
    background-color: var(--card-background);
    color: var(--text-color);
    border-color: var(--border-color);
}

.dark-theme .navbar {
    background-color: var(--card-background);
    border-bottom-color: var(--border-color);
}

.dark-theme .sidebar {
    background-color: var(--card-background);
    border-right-color: var(--border-color);
}

.dark-theme .table {
    color: var(--text-color);
    background-color: var(--card-background);
}

.dark-theme .table thead th {
    background-color: rgba(15, 23, 42, 0.5);
    color: var(--text-color);
    border-color: var(--border-color);
}

.dark-theme .table tbody tr {
    background-color: var(--card-background);
    border-color: var(--border-color);
}

.dark-theme .table tbody td {
    background-color: var(--card-background);
    border-color: var(--border-color);
    color: var(--text-color);
}

.dark-theme .table-hover tbody tr:hover {
    background-color: rgba(100, 116, 139, 0.1);
}

.dark-theme .table-hover tbody tr:hover td {
    background-color: rgba(100, 116, 139, 0.1);
    color: var(--text-color);
}

.dark-theme .table-light {
    background-color: var(--card-background);
    color: var(--text-color);
}

.dark-theme .table-light th {
    background-color: var(--card-background);
    color: var(--text-color);
    border-color: var(--border-color);
}

.dark-theme .form-control,
.dark-theme .form-select {
    background-color: rgba(15, 23, 42, 0.5);
    border-color: var(--border-color);
    color: var(--text-color);
}

.dark-theme .form-control:focus,
.dark-theme .form-select:focus {
    background-color: rgba(15, 23, 42, 0.7);
    border-color: var(--primary-color);
    color: var(--text-color);
}

.dark-theme .input-group-text {
    background-color: rgba(15, 23, 42, 0.5);
    border-color: var(--border-color);
    color: var(--text-muted);
}

.dark-theme .modal-content {
    background-color: var(--card-background);
    color: var(--text-color);
    border-color: var(--border-color);
}

.dark-theme .modal-header {
    background-color: var(--card-background);
    border-bottom-color: var(--border-color);
}

.dark-theme .modal-footer {
    background-color: var(--card-background);
    border-top-color: var(--border-color);
}

.dark-theme .modal-body {
    background-color: var(--card-background);
    color: var(--text-color);
}

.dark-theme .offcanvas {
    background-color: var(--card-background);
    color: var(--text-color);
}

.dark-theme .dropdown-menu {
    background-color: var(--card-background);
    border-color: var(--border-color);
}

.dark-theme .dropdown-item {
    color: var(--text-color);
}

.dark-theme .dropdown-item:hover {
    background-color: rgba(100, 116, 139, 0.1);
}

.dark-theme .alert {
    border-color: var(--border-color);
}

.dark-theme .text-muted {
    color: var(--text-muted) !important;
}

.dark-theme .badge {
    background-color: rgba(100, 116, 139, 0.2);
}

.dark-theme .btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-color);
}

.dark-theme .btn-outline-secondary:hover {
    background-color: rgba(100, 116, 139, 0.2);
    border-color: var(--border-color);
    color: var(--text-color);
}

.dark-theme .btn-outline-secondary.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.dark-theme .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.dark-theme .input-group-text {
    background-color: var(--card-background);
    border-color: var(--border-color);
    color: var(--text-color);
}

.dark-theme .badge {
    color: var(--text-color);
}

.dark-theme .bg-light {
    background-color: var(--card-background) !important;
    color: var(--text-color) !important;
}

.dark-theme .text-muted {
    color: var(--text-muted) !important;
}

.dark-theme .border-light {
    border-color: var(--border-color) !important;
}

.sidebar-menu-item i {
    width: 24px;
    height: 24px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Sidebar Icons */
.sidebar-menu-item i.bi-speedometer2::before {
    content: "\f3fd";
}

.sidebar-menu-item i.bi-box-seam::before {
    content: "\f1e3";
}

.sidebar-menu-item i.bi-cart::before {
    content: "\f242";
}

.sidebar-menu-item i.bi-graph-up::before {
    content: "\f5c7";
}

/* Sidebar Logo */
.sidebar-logo {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.sidebar-logo img {
    width: 32px;
    height: 32px;
    transition: all 0.3s ease;
}

.sidebar-logo .logo-text {
    opacity: 0;
    margin-left: 0.75rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-color);
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

.sidebar:hover .sidebar-logo .logo-text {
    opacity: 1;
}

/* Settings Section */
.sidebar-settings {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.settings-item {
    display: flex;
    align-items: center;
    padding: 0.5rem 1.25rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.settings-item:hover {
    background-color: rgba(148, 163, 184, 0.1);
    color: var(--text-color);
}

.settings-item span {
    opacity: 0;
    transition: opacity 0.3s ease;
    margin-left: 0.75rem;
}

.sidebar:hover .settings-item span {
    opacity: 1;
}

.settings-item i {
    width: 20px;
    height: 20px;
    font-size: 0.9rem;
}

/* Content */
.content {
    margin-left: 60px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    min-height: calc(100vh - 60px);
    position: relative;
    z-index: 10;
}

.content.expanded {
    margin-left: 0;
}

/* Card Styles */
.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    background-color: var(--card-background);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem;
}

.card-title {
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 0;
}

.card-body {
    padding: 1.25rem;
}

/* Product Card Styles */
.product-card {
    transition: all 0.2s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
}

.product-image {
    height: 200px;
    object-fit: cover;
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
}

.stock-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.product-price {
    color: var(--primary-color);
}

.product-stock {
    font-size: 0.875rem;
}

/* Cart Styles */
.cart-item {
    border-radius: 0.5rem;
}

.cart-item-image {
    object-fit: cover;
}

.cart-item-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
}

.cart-item-price {
    font-size: 0.875rem;
}

/* Button Styles */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
}

/* Form Styles */
.form-control {
    border-radius: 0.5rem;
    border-color: var(--border-color);
    padding: 0.625rem 0.875rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37,99,235,.25);
}

.input-group .form-control:focus {
    border-color: var(--border-color);
    box-shadow: none;
}

/* Search and Filter Styles */
.input-group-text {
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
}

.form-select {
    border-radius: 0.5rem;
    border-color: var(--border-color);
    padding: 0.625rem 2.25rem 0.625rem 0.875rem;
}

/* Table Styles */
.table {
    margin-bottom: 0;
}

.table th {
    border-top: none;
    background-color: rgba(248, 250, 252, 0.5);
    font-weight: 500;
    color: var(--text-color);
}

.table td {
    vertical-align: middle;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        margin-left: -250px;
    }
    
    .sidebar.show {
        margin-left: 0;
    }
    
    .content {
        margin-left: 0;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }

    .product-card {
        margin-bottom: 1rem;
    }
}