/**
 * WC Bundles - Frontend Styles
 *
 * Modern, minimal, theme-agnostic bundle selection UI.
 * Uses CSS custom properties for easy theme customization.
 *
 * @package WC_Bundles
 * @since 1.0.0
 */

/* ============================================
   CSS Custom Properties (Theme Override Points)
   ============================================ */
:root {
    /* Colors */
    --wcb-primary: #2563eb;
    --wcb-primary-hover: #1d4ed8;
    --wcb-success: #10b981;
    --wcb-warning: #f59e0b;
    --wcb-error: #ef4444;
    --wcb-text: #1f2937;
    --wcb-text-muted: #6b7280;
    --wcb-border: #e5e7eb;
    --wcb-bg: #ffffff;
    --wcb-bg-alt: #f9fafb;
    --wcb-bg-selected: #eff6ff;
    
    /* Spacing */
    --wcb-spacing-xs: 4px;
    --wcb-spacing-sm: 8px;
    --wcb-spacing-md: 16px;
    --wcb-spacing-lg: 24px;
    
    /* Border Radius */
    --wcb-radius-sm: 6px;
    --wcb-radius-md: 8px;
    --wcb-radius-lg: 12px;
    
    /* Shadows */
    --wcb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --wcb-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --wcb-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --wcb-transition: 0.2s ease;
}

/* ============================================
   Main Container
   ============================================ */
.wc-bundles-selector {
    margin: var(--wcb-spacing-lg) 0;
    font-family: inherit;
}

/* Loading State */
.wc-bundles-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--wcb-spacing-sm);
    padding: var(--wcb-spacing-lg);
    color: var(--wcb-text-muted);
}

.wc-bundles-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--wcb-border);
    border-top-color: var(--wcb-primary);
    border-radius: 50%;
    animation: wcb-spin 0.8s linear infinite;
}

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

/* ============================================
   Tier Accordion
   ============================================ */
.wcb-tier {
    border: 1px solid var(--wcb-border);
    border-radius: var(--wcb-radius-md);
    margin-bottom: var(--wcb-spacing-md);
    background: var(--wcb-bg);
    overflow: hidden;
    transition: box-shadow var(--wcb-transition);
}

.wcb-tier:hover {
    box-shadow: var(--wcb-shadow-sm);
}

.wcb-tier:last-child {
    margin-bottom: 0;
}

.wcb-tier.wcb-has-selection {
    border-color: var(--wcb-primary);
}

/* Tier Header */
.wcb-tier-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--wcb-spacing-md);
    background: var(--wcb-bg-alt);
    cursor: pointer;
    user-select: none;
    transition: background-color var(--wcb-transition);
}

.wcb-tier-header:hover {
    background: #f3f4f6;
}

.wcb-tier-header-left {
    display: flex;
    align-items: center;
    gap: var(--wcb-spacing-sm);
}

.wcb-tier-header-right {
    display: flex;
    align-items: center;
    gap: var(--wcb-spacing-md);
}

.wcb-tier-toggle {
    display: flex;
    align-items: center;
    transition: transform var(--wcb-transition);
}

.wcb-tier-open .wcb-tier-toggle {
    transform: rotate(180deg);
}

.wcb-chevron {
    color: var(--wcb-text-muted);
}

.wcb-tier-title {
    font-weight: 600;
    font-size: 15px;
    color: var(--wcb-text);
}

/* Badges */
.wcb-required-badge,
.wcb-optional-badge {
    font-size: 11px;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wcb-required-badge {
    background: #fef2f2;
    color: var(--wcb-error);
}

.wcb-optional-badge {
    background: #f0fdf4;
    color: var(--wcb-success);
}

.wcb-qty-info {
    font-size: 12px;
    color: var(--wcb-text-muted);
}

.wcb-selection-count {
    font-size: 12px;
    font-weight: 500;
    color: var(--wcb-primary);
    background: var(--wcb-bg-selected);
    padding: 4px 10px;
    border-radius: 999px;
}

/* Tier Body */
.wcb-tier-body {
    padding: var(--wcb-spacing-md);
    border-top: 1px solid var(--wcb-border);
}

.wcb-no-products {
    text-align: center;
    color: var(--wcb-text-muted);
    padding: var(--wcb-spacing-lg);
    margin: 0;
}

/* ============================================
   Products Grid
   ============================================ */
.wcb-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--wcb-spacing-md);
}

/* Product Card */
.wcb-product-card {
    position: relative;
    border: 2px solid var(--wcb-border);
    border-radius: var(--wcb-radius-md);
    background: var(--wcb-bg);
    transition: all var(--wcb-transition);
    overflow: hidden;
}

.wcb-product-card:hover {
    border-color: #d1d5db;
    box-shadow: var(--wcb-shadow-sm);
}

.wcb-product-card.wcb-selected {
    border-color: var(--wcb-primary);
    background: var(--wcb-bg-selected);
}

.wcb-product-card.wcb-out-of-stock {
    opacity: 0.6;
}

/* Product Label (Clickable Area) */
.wcb-product-label {
    display: block;
    cursor: pointer;
    padding: var(--wcb-spacing-sm);
}

.wcb-product-card.wcb-out-of-stock .wcb-product-label {
    cursor: not-allowed;
}

/* Custom Checkbox */
.wcb-product-checkbox-wrapper {
    position: absolute;
    top: var(--wcb-spacing-sm);
    right: var(--wcb-spacing-sm);
    z-index: 2;
}

.wcb-product-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.wcb-checkbox-custom {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 2px solid var(--wcb-border);
    border-radius: var(--wcb-radius-sm);
    background: var(--wcb-bg);
    transition: all var(--wcb-transition);
}

.wcb-product-checkbox:checked + .wcb-checkbox-custom {
    background: var(--wcb-primary);
    border-color: var(--wcb-primary);
}

.wcb-product-checkbox:checked + .wcb-checkbox-custom::after {
    content: '';
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.wcb-product-checkbox:focus + .wcb-checkbox-custom {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* Update card state when checkbox is checked */
.wcb-product-checkbox:checked ~ .wcb-product-image,
.wcb-product-checkbox:checked ~ .wcb-product-info {
    /* Visual feedback handled by parent .wcb-selected class */
}

/* Product Image */
.wcb-product-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--wcb-radius-sm);
    background: var(--wcb-bg-alt);
}

.wcb-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--wcb-transition);
}

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

.wcb-stock-badge {
    position: absolute;
    bottom: var(--wcb-spacing-xs);
    left: var(--wcb-spacing-xs);
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border-radius: var(--wcb-radius-sm);
    text-transform: uppercase;
}

/* Product Info */
.wcb-product-info {
    padding: var(--wcb-spacing-sm) 0 0 0;
    text-align: center;
}

.wcb-product-name {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--wcb-text);
    line-height: 1.3;
    margin-bottom: var(--wcb-spacing-xs);
    
    /* Truncate long names */
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Product Price */
.wcb-product-price {
    font-size: 14px;
    font-weight: 600;
}

.wcb-price {
    color: var(--wcb-text);
}

.wcb-price-free {
    color: var(--wcb-success);
    font-weight: 700;
}

.wcb-price-original {
    color: var(--wcb-text-muted);
    text-decoration: line-through;
    font-weight: 400;
    margin-right: var(--wcb-spacing-xs);
}

.wcb-price-discounted {
    color: var(--wcb-success);
}

/* Variation Selector */
.wcb-variation-selector {
    padding: var(--wcb-spacing-sm);
    border-top: 1px solid var(--wcb-border);
}

.wcb-variation-select {
    width: 100%;
    padding: 6px 8px;
    font-size: 12px;
    border: 1px solid var(--wcb-border);
    border-radius: var(--wcb-radius-sm);
    background: var(--wcb-bg);
    cursor: pointer;
    transition: border-color var(--wcb-transition);
}

.wcb-variation-select:focus {
    outline: none;
    border-color: var(--wcb-primary);
}

.wcb-variation-select.wcb-highlight {
    border-color: var(--wcb-warning);
    animation: wcb-pulse 0.5s ease-in-out;
}

@keyframes wcb-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* ============================================
   Bundle Summary
   ============================================ */
.wc-bundles-summary {
    margin-top: var(--wcb-spacing-lg);
    padding: var(--wcb-spacing-md);
    background: var(--wcb-bg-alt);
    border: 1px solid var(--wcb-border);
    border-radius: var(--wcb-radius-md);
}

.wc-bundles-summary h4 {
    margin: 0 0 var(--wcb-spacing-md) 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--wcb-text);
}

.wcb-summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--wcb-spacing-sm) 0;
    border-bottom: 1px solid var(--wcb-border);
}

.wcb-summary-item:last-child {
    border-bottom: none;
}

.wcb-summary-item-name {
    font-size: 13px;
    color: var(--wcb-text);
}

.wcb-summary-item-price {
    font-size: 13px;
    font-weight: 600;
    color: var(--wcb-success);
}

/* Savings */
.wcb-savings {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--wcb-spacing-md);
    padding-top: var(--wcb-spacing-md);
    border-top: 2px solid var(--wcb-success);
}

.wcb-savings-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--wcb-success);
}

.wcb-savings-amount {
    font-size: 18px;
    font-weight: 700;
    color: var(--wcb-success);
}

/* ============================================
   Notices
   ============================================ */
.wcb-notice {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--wcb-spacing-sm) var(--wcb-spacing-md);
    margin-bottom: var(--wcb-spacing-md);
    border-radius: var(--wcb-radius-sm);
    font-size: 13px;
    animation: wcb-slideDown 0.3s ease;
}

@keyframes wcb-slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.wcb-notice-info {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.wcb-notice-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fcd34d;
}

.wcb-notice-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.wcb-notice-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    opacity: 0.6;
    padding: 0;
    line-height: 1;
}

.wcb-notice-close:hover {
    opacity: 1;
}

/* ============================================
   Cart Item Styles
   ============================================ */
.wcb-bundle-parent {
    /* Parent item styling if needed */
}

.wcb-bundle-child {
    background: var(--wcb-bg-alt) !important;
}

.wcb-bundle-child td {
    padding-left: 30px !important;
}

.wcb-bundle-child td.product-name::before {
    content: '↳ ';
    color: var(--wcb-text-muted);
}

.wcb-bundle-indicator {
    color: var(--wcb-text-muted);
    margin-right: var(--wcb-spacing-xs);
}

.wcb-bundle-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 500;
    padding: 2px 8px;
    margin-left: var(--wcb-spacing-sm);
    background: var(--wcb-primary);
    color: white;
    border-radius: 999px;
}

.wcb-quantity-display {
    display: inline-block;
    padding: 6px 12px;
    background: var(--wcb-bg-alt);
    border-radius: var(--wcb-radius-sm);
    font-weight: 500;
}

/* Order Email Styles */
.wcb-bundle-child-name {
    color: #666;
    font-style: normal;
}

.wcb-bundle-info {
    color: #0073aa;
    font-weight: normal;
    font-size: 0.9em;
}

/* ============================================
   Responsive Design
   ============================================ */
@media screen and (max-width: 768px) {
    .wcb-products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--wcb-spacing-sm);
    }
    
    .wcb-tier-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--wcb-spacing-sm);
    }
    
    .wcb-tier-header-right {
        width: 100%;
        justify-content: space-between;
    }
}

@media screen and (max-width: 480px) {
    .wcb-products-grid {
        grid-template-columns: 1fr;
    }
    
    .wcb-product-card {
        display: flex;
        flex-direction: row;
    }
    
    .wcb-product-label {
        display: flex;
        align-items: center;
        width: 100%;
    }
    
    .wcb-product-image {
        width: 80px;
        height: 80px;
        flex-shrink: 0;
        aspect-ratio: auto;
    }
    
    .wcb-product-info {
        flex: 1;
        text-align: left;
        padding: 0 var(--wcb-spacing-sm);
    }
    
    .wcb-product-checkbox-wrapper {
        position: relative;
        top: auto;
        right: auto;
        margin-right: var(--wcb-spacing-sm);
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .wc-bundles-spinner {
        animation: none;
    }
    
    .wcb-tier-toggle,
    .wcb-product-image img,
    .wcb-product-card,
    .wcb-checkbox-custom,
    .wcb-notice {
        transition: none;
    }
}