/* Modern CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --border-radius: 8px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

/* Header Styles */
.header {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 32px;
    border: 1px solid var(--gray-200);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.header h1 {
    color: var(--gray-800);
    margin: 0;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.user-greeting {
    color: var(--gray-600);
    font-size: 14px;
}

.user-name {
    color: var(--gray-900);
    font-weight: 600;
    font-size: 16px;
}

.user-email {
    color: var(--gray-500);
    font-size: 12px;
}

.logout-btn {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
}

.logout-btn:hover {
    background: var(--gray-200);
    color: var(--gray-800);
    border-color: var(--gray-300);
}

/* Form Styles */
.search-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.form-group input[type="text"],
.form-group select:not(.multi-select) {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: all 0.2s ease;
    background: var(--white);
    color: var(--gray-900);
}

.form-group input[type="text"]:focus,
.form-group select:not(.multi-select):focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input[type="text"]::placeholder {
    color: var(--gray-400);
}


/* Button Styles */
.btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    justify-content: center;
}

/* Import Section */
.import-section {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-top: 24px;
    border: 1px solid var(--gray-200);
    text-align: center;
}

.import-btn {
    background: var(--success-color);
    font-size: 18px;
    padding: 16px 32px;
    flex-direction: column;
    gap: 4px;
    min-width: 280px;
}

.import-btn:hover:not(:disabled) {
    background: #059669;
}

.import-btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
}

.import-btn #selected-count {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.9;
}

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

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
    color: var(--gray-800);
    border-color: var(--gray-400);
}

.btn-secondary:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(107, 114, 128, 0.1);
}

/* Form Layout */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 20px;
    align-items: end;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    padding-top: 16px;
}

/* Loading States */
.loading {
    text-align: center;
    padding: 48px;
    color: var(--gray-500);
    font-size: 16px;
}

.loading::before {
    content: "⏳";
    display: block;
    font-size: 24px;
    margin-bottom: 16px;
}

/* Error States */
.error {
    background: var(--error-color);
    color: var(--white);
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin: 20px 0;
    font-weight: 500;
}

.error::before {
    content: "⚠️";
    margin-right: 8px;
}

/* Products Table */
.products-table {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.table-header {
    background: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
    padding: 16px 24px;
    display: grid;
    grid-template-columns: 40px 50px 60px 2fr 1fr 1fr 1fr;
    gap: 20px;
    align-items: center;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-row {
    display: grid;
    grid-template-columns: 40px 50px 60px 2fr 1fr 1fr 1fr;
    gap: 20px;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.2s ease;
}

.product-row:hover {
    background: var(--gray-50);
}

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

/* Checkbox Styles */
.select-checkbox,
.product-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* Product Info */
.product-number,
.variation-number {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 600;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, monospace;
}

.product-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--gray-900);
}

.toggle-variations {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    color: var(--gray-500);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-variations:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.toggle-icon {
    transition: transform 0.2s ease;
    font-size: 12px;
}

.toggle-variations[aria-expanded="true"] .toggle-icon {
    transform: rotate(90deg);
}

.product-sku {
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    font-size: 13px;
    color: var(--gray-600);
    background: var(--gray-100);
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.product-brand {
    color: var(--gray-700);
    font-weight: 500;
}

.product-type {
    text-align: center;
}

/* Type Badges */
.type-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.type-badge.simple {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.type-badge.variable {
    background: var(--primary-color);
    color: var(--white);
}

.type-badge.variation {
    background: var(--success-color);
    color: var(--white);
}

.type-badge.composite {
    background: var(--warning-color);
    color: var(--white);
}

.type-badge.mix-and-match {
    background: #8b5cf6;
    color: var(--white);
}

.child-count-badge {
    display: inline-block;
    background: var(--gray-100);
    color: var(--gray-600);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: 6px;
    border: 1px solid var(--gray-300);
}

/* Variations */
.variations-container {
    background: var(--gray-50);
}

.variation-row {
    display: grid;
    grid-template-columns: 40px 50px 60px 2fr 1fr 1fr 1fr;
    gap: 20px;
    align-items: center;
    padding: 12px 24px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    position: relative;
}


.variation-indent {
    color: var(--gray-400);
    font-family: monospace;
    margin-right: 8px;
    font-size: 14px;
}

.variation-checkbox {
    width: 18px;
    height: 18px;
    cursor: not-allowed;
    opacity: 0.5;
    accent-color: var(--primary-color);
    pointer-events: none;
}

/* Product Image Thumbnails */
.product-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-thumbnail {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.product-thumbnail.default-image {
    opacity: 0.8;
    border: 1px solid var(--gray-300);
    background: var(--white);
}

.variation-thumbnail {
    width: 32px;
    height: 32px;
}

/* Empty States */
.empty-state {
    background: var(--white);
    color: var(--gray-600);
    padding: 64px 48px;
    border-radius: var(--border-radius);
    text-align: center;
    font-size: 16px;
    border: 2px dashed var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.empty-state h3 {
    color: var(--gray-700);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--gray-500);
    font-size: 16px;
    line-height: 1.5;
}

.error {
    background: var(--error-color);
    color: var(--white);
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin: 20px 0;
    font-weight: 500;
}

.error::before {
    content: "⚠️";
    margin-right: 8px;
}

/* HTMX Loading */
.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator {
    display: inline;
}

/* Authentication UI */
.auth-nav {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.nav-brand h1 {
    color: var(--gray-900);
    font-size: 24px;
    font-weight: 600;
    margin: 0;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

#user-info {
    color: var(--gray-600);
    font-size: 14px;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-50);
}

.login-card {
    background: var(--white);
    padding: 48px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
    width: 100%;
    margin: 24px;
}

.login-card h1 {
    color: var(--gray-900);
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
}

.login-card p {
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.6;
}

.login-btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s;
}

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

.error-message {
    background: var(--error-color);
    color: var(--white);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    font-size: 14px;
}

.auth-required {
    background: var(--white);
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    padding: 48px;
    text-align: center;
    margin: 24px;
}

.auth-message h3 {
    color: var(--gray-900);
    margin-bottom: 8px;
}

.auth-message p {
    color: var(--gray-600);
    margin-bottom: 24px;
}

.loading {
    text-align: center;
    padding: 48px;
    color: var(--gray-600);
}

.htmx-request.htmx-indicator {
    display: inline;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .table-header,
    .product-row,
    .variation-row {
        grid-template-columns: 40px 50px 1fr 100px 80px;
        gap: 16px;
    }
    
    .col-number,
    .product-number,
    .variation-number {
        display: none;
    }
    
    .col-brand,
    .product-brand,
    .col-type,
    .product-type {
        display: none;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .header {
        padding: 24px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .user-section {
        align-self: flex-end;
    }
    
    .user-info {
        align-items: flex-start;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        align-items: stretch;
    }
    
    .form-row .form-group:last-child {
        margin-top: 16px;
    }
    
    .table-header,
    .product-row,
    .variation-row {
        grid-template-columns: 40px 40px 1fr 100px;
        gap: 12px;
        padding: 12px 16px;
    }
    
    .col-brand,
    .product-brand,
    .col-type,
    .product-type {
        display: none;
    }
    
    .product-sku {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 24px;
    }
    
    .table-header,
    .product-row,
    .variation-row {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 16px;
    }
    
    .product-row {
        border-left: 4px solid var(--gray-200);
    }
    
    .variation-row {
        border-left: 4px solid var(--success-color);
    }
    
    .select-checkbox,
    .product-checkbox {
        position: absolute;
        right: 16px;
        top: 16px;
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.gap-2 {
    gap: 8px;
}

.gap-4 {
    gap: 16px;
}

/* Pagination Styles */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-top: 24px;
    border: 1px solid var(--gray-200);
}

.pagination-info {
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 24px;
}

.per-page-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.per-page-selector label {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

.per-page-select {
    padding: 6px 8px;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    background: var(--white);
    color: var(--gray-700);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.per-page-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pagination-btn {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-700);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-btn:hover:not(.disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

.pagination-btn.current {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.pagination-btn.disabled {
    background: var(--gray-100);
    color: var(--gray-400);
    cursor: not-allowed;
    border-color: var(--gray-200);
}

.pagination-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

@media (max-width: 768px) {
    .pagination-container {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }
    
    .pagination-info {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .pagination-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
}