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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: var(--bg-white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-danger:hover {
    background: #dc2626;
}

/* Tabs */
.admin-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    background: var(--bg-white);
    padding: 8px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    flex: 1;
    padding: 12px 24px;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: var(--bg-light);
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.section-header h2 {
    font-size: 22px;
    font-weight: 700;
}

.section-header > div {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--bg-white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.card p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 16px;
}

.card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.card-actions button {
    flex: 1;
    padding: 8px;
    font-size: 13px;
}

/* Table */
.table-container {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

td {
    font-size: 14px;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background: var(--bg-light);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
}

.form-input, .form-select, textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--bg-white);
    margin: 5% auto;
    padding: 32px;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-large {
    max-width: 900px;
}

.modal-content h2 {
    margin-bottom: 24px;
    font-size: 24px;
    font-weight: 700;
}

.close {
    float: right;
    font-size: 32px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

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

/* Configurator Specific */
.product-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.product-type-btn {
    padding: 32px 24px;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.product-type-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.config-section {
    background: var(--bg-white);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.filter-logic-selector {
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: 8px;
}

.filter-logic-selector label {
    display: block;
    font-weight: 600;
    margin-bottom: 12px;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.filter-item {
    padding: 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-light);
}

.filter-item label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.filter-input-group {
    display: flex;
    gap: 8px;
}

.filter-input-group select {
    width: 80px;
}

.filter-input-group input {
    flex: 1;
}

.filter-actions {
    display: flex;
    gap: 12px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.2s;
    cursor: pointer;
}

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

.product-image {
    width: 100%;
    height: 200px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--text-muted);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.product-attributes {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

.product-attribute {
    display: flex;
    justify-content: space-between;
}

.product-attribute strong {
    color: var(--text-dark);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* Responsive */
@media (max-width: 768px) {
    .card-grid, .filters-grid, .results-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .section-header > div {
        width: 100%;
        flex-direction: column;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 24px;
    }
}