/* 
 * B2B eCommerce Platform Styles
 * Modern, Professional Design
 */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --dark: #1e293b;
    --light: #f8fafc;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Header & Navigation */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary) !important;
}

.nav-link {
    color: var(--gray-600) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary) !important;
    background: var(--gray-100);
}

/* Search Bar */
.search-bar {
    position: relative;
    max-width: 500px;
    flex: 1;
}

.search-bar input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-bar .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

/* Cart Icon */
.cart-icon {
    position: relative;
    padding: 0.5rem;
}

.cart-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    border-radius: 50%;
    min-width: 18px;
    text-align: center;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

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

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
}

/* Cards */
.card {
    background: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

/* Product Cards */
.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    padding-top: 100%;
    background: var(--gray-100);
    overflow: hidden;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    background: var(--success);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    z-index: 1;
}

.product-badge.out-of-stock {
    background: var(--danger);
}

.product-info {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    margin-top: auto;
    padding-top: 0.5rem;
}

.price-current {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.price-original {
    font-size: 0.9rem;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-left: 0.5rem;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* Sidebar Filters */
.filter-sidebar {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.filter-section {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.filter-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.filter-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.filter-options label {
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
}

.filter-options label:hover {
    color: var(--primary);
}

.filter-options input[type="checkbox"] {
    margin-right: 0.75rem;
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* Price Range */
.price-range {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.price-range input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

/* Category List */
.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: 0.5rem;
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    color: var(--gray-600);
    border-radius: var(--radius);
    transition: var(--transition);
}

.category-list a:hover, .category-list a.active {
    background: var(--gray-100);
    color: var(--primary);
}

.category-count {
    background: var(--gray-200);
    color: var(--gray-600);
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: 50px;
}

/* Admin Sidebar */
.admin-sidebar {
    width: 260px;
    background: var(--dark);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.admin-sidebar .sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.admin-sidebar .sidebar-brand {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 700;
}

.admin-sidebar .nav-menu {
    padding: 1rem 0;
}

.admin-sidebar .nav-item {
    margin-bottom: 0.25rem;
}

.admin-sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--gray-400) !important;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.admin-sidebar .nav-link:hover {
    background: rgba(255,255,255,0.05);
    color: var(--white) !important;
}

.admin-sidebar .nav-link.active {
    background: rgba(37, 99, 235, 0.2);
    color: var(--white) !important;
    border-left-color: var(--primary);
}

.admin-sidebar .nav-link i {
    width: 24px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.admin-content {
    margin-left: 260px;
    min-height: 100vh;
    padding: 2rem;
    background: var(--gray-100);
}

.admin-header {
    background: var(--white);
    padding: 1rem 1.5rem;
    margin: -2rem -2rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Stats Cards */
.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.stat-card .stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-card .stat-icon.primary {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.stat-card .stat-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-card .stat-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-card .stat-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1;
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Tables */
.table {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table thead th {
    background: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
    font-weight: 600;
    color: var(--gray-700);
    padding: 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

/* Status Badges */
.badge {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 50px;
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-info {
    background: rgba(6, 182, 212, 0.1);
    color: var(--info);
}

.badge-primary {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

/* Forms */
.form-control, .form-select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

/* Modal */
.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--gray-200);
    padding: 1.25rem 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* Cart */
.cart-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.cart-item-image {
    width: 80px;
    height: 80px;
    border-radius: var(--radius);
    object-fit: cover;
}

.cart-item-info {
    flex: 1;
}

.cart-item-title {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.cart-item-price {
    color: var(--primary);
    font-weight: 600;
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantity-control button {
    width: 32px;
    height: 32px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.quantity-control button:hover {
    background: var(--gray-100);
}

.quantity-control input {
    width: 50px;
    text-align: center;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 0.25rem;
}

/* Order Summary */
.order-summary {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.order-summary .summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.order-summary .summary-row:last-child {
    border-bottom: none;
}

.order-summary .summary-total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 4rem 0;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

/* Category Banner */
.category-banner {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('/assets/images/category-bg.jpg') center/cover;
    color: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}

.category-banner h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* Footer */
.main-footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 3rem 0 1.5rem;
    margin-top: 3rem;
}

.footer-brand {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-links h5 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--gray-400);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    margin-top: 2rem;
    text-align: center;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    border: none;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.alert-info {
    background: rgba(6, 182, 212, 0.1);
    color: var(--info);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 991px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.show {
        transform: translateX(0);
    }
    
    .admin-content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .filter-sidebar {
        margin-bottom: 1.5rem;
    }
    
    .product-card {
        margin-bottom: 1rem;
    }
}

/* Utility Classes */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--gray-500) !important; }

.bg-primary { background-color: var(--primary) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-warning { background-color: var(--warning) !important; }
.bg-danger { background-color: var(--danger) !important; }
.bg-light { background-color: var(--light) !important; }

.rounded { border-radius: var(--radius) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }

.shadow { box-shadow: var(--shadow) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }