/**
 * Infinite Scroll CSS - Styling for Infinite Loading Components
 * Part of Set 2 Implementation - User Experience & Content
 * 
 * Features:
 * - Loading indicators
 * - Smooth animations
 * - Responsive design
 * - Error states
 * - End states
 */

/* Loading Indicator */
.infinite-scroll-loading {
    text-align: center;
    padding: 40px 20px;
    margin: 20px 0;
}

.infinite-scroll-loading .loading-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: #666;
    font-size: 16px;
}

.infinite-scroll-loading .loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007cba;
    border-radius: 50%;
    animation: infinite-scroll-spin 1s linear infinite;
}

@keyframes infinite-scroll-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.infinite-scroll-loading .loading-text {
    font-weight: 500;
}

/* End Indicator */
.infinite-scroll-end {
    text-align: center;
    padding: 30px 20px;
    margin: 20px 0;
    color: #888;
    font-size: 14px;
    border-top: 1px solid #e0e0e0;
    background: #f8f9fa;
}

.infinite-scroll-end span {
    display: inline-block;
    padding: 10px 20px;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    font-weight: 500;
}

/* Error Indicator */
.infinite-scroll-error {
    text-align: center;
    padding: 30px 20px;
    margin: 20px 0;
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 4px;
    color: #856404;
}

.infinite-scroll-error span {
    display: block;
    margin-bottom: 15px;
    font-weight: 500;
}

.infinite-scroll-error .retry-btn {
    background: #007cba;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.infinite-scroll-error .retry-btn:hover {
    background: #005a87;
}

/* Product Animation */
.products .product,
.woocommerce ul.products li.product {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.products .product.loading,
.woocommerce ul.products li.product.loading {
    opacity: 0;
    transform: translateY(20px);
}

/* Smooth Loading Animation for New Products */
@keyframes infinite-scroll-fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.infinite-scroll-new-item {
    animation: infinite-scroll-fade-in 0.5s ease forwards;
}

/* Loading State for Product Grid */
.infinite-scroll-loading-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.infinite-scroll-loading-grid .loading-placeholder {
    background: #f8f9fa;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.infinite-scroll-loading-grid .loading-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    animation: infinite-scroll-shimmer 1.5s infinite;
}

@keyframes infinite-scroll-shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.infinite-scroll-loading-grid .loading-placeholder-image {
    width: 100%;
    height: 200px;
    background: #e0e0e0;
}

.infinite-scroll-loading-grid .loading-placeholder-content {
    padding: 15px;
}

.infinite-scroll-loading-grid .loading-placeholder-title {
    height: 16px;
    background: #e0e0e0;
    margin-bottom: 10px;
    border-radius: 2px;
}

.infinite-scroll-loading-grid .loading-placeholder-price {
    height: 14px;
    background: #e0e0e0;
    width: 60%;
    border-radius: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .infinite-scroll-loading {
        padding: 30px 15px;
    }
    
    .infinite-scroll-loading .loading-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .infinite-scroll-end {
        padding: 25px 15px;
        margin: 15px 0;
    }
    
    .infinite-scroll-error {
        padding: 25px 15px;
        margin: 15px 0;
    }
    
    .infinite-scroll-loading-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .infinite-scroll-loading {
        padding: 20px 10px;
    }
    
    .infinite-scroll-loading .loading-content {
        font-size: 14px;
    }
    
    .infinite-scroll-loading .loading-spinner {
        width: 20px;
        height: 20px;
        border-width: 2px;
    }
    
    .infinite-scroll-end {
        padding: 20px 10px;
        font-size: 13px;
    }
    
    .infinite-scroll-error {
        padding: 20px 10px;
        font-size: 13px;
    }
    
    .infinite-scroll-loading-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .infinite-scroll-loading-grid .loading-placeholder-image {
        height: 150px;
    }
    
    .infinite-scroll-loading-grid .loading-placeholder-content {
        padding: 10px;
    }
}

/* Integration with WooCommerce Styles */
.woocommerce .infinite-scroll-loading,
.woocommerce .infinite-scroll-end,
.woocommerce .infinite-scroll-error {
    clear: both;
    width: 100%;
}

/* Hide Original Pagination when Infinite Scroll is Active */
.infinite-scroll-active .woocommerce-pagination {
    display: none !important;
}

.infinite-scroll-active .load-more-products {
    display: none !important;
}

/* Smooth Scroll Behavior */
html.infinite-scroll-smooth {
    scroll-behavior: smooth;
}

/* Loading State for Filters */
.infinite-scroll-filter-loading {
    position: relative;
    opacity: 0.6;
    pointer-events: none;
}

.infinite-scroll-filter-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007cba;
    border-radius: 50%;
    animation: infinite-scroll-spin 1s linear infinite;
    z-index: 10;
}

/* Accessibility */
.infinite-scroll-loading[aria-hidden="true"],
.infinite-scroll-end[aria-hidden="true"],
.infinite-scroll-error[aria-hidden="true"] {
    display: none;
}

.infinite-scroll-loading .loading-spinner {
    /* Screen reader text */
}

.infinite-scroll-loading .loading-text {
    /* Ensure text is readable */
    color: #333;
}

/* Focus Management */
.infinite-scroll-new-item:focus {
    outline: 2px solid #007cba;
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .infinite-scroll-loading .loading-spinner {
        border-color: #000;
        border-top-color: #007cba;
    }
    
    .infinite-scroll-end {
        border-color: #000;
        background: #fff;
    }
    
    .infinite-scroll-error {
        background: #fff;
        border-color: #d32f2f;
        color: #000;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .infinite-scroll-loading .loading-spinner {
        animation: none;
        border-top-color: transparent;
    }
    
    .products .product,
    .woocommerce ul.products li.product {
        transition: none;
    }
    
    .infinite-scroll-new-item {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .infinite-scroll-loading-grid .loading-placeholder::before {
        animation: none;
    }
}

/* Print Styles */
@media print {
    .infinite-scroll-loading,
    .infinite-scroll-end,
    .infinite-scroll-error {
        display: none !important;
    }
}

/* Custom Scrollbar for Loading Areas */
.infinite-scroll-loading::-webkit-scrollbar,
.infinite-scroll-end::-webkit-scrollbar,
.infinite-scroll-error::-webkit-scrollbar {
    width: 6px;
}

.infinite-scroll-loading::-webkit-scrollbar-track,
.infinite-scroll-end::-webkit-scrollbar-track,
.infinite-scroll-error::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.infinite-scroll-loading::-webkit-scrollbar-thumb,
.infinite-scroll-end::-webkit-scrollbar-thumb,
.infinite-scroll-error::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

/* Theme Integration */
.infinite-scroll-loading,
.infinite-scroll-end,
.infinite-scroll-error {
    font-family: inherit;
    line-height: inherit;
}

/* Performance Optimization */
.infinite-scroll-loading .loading-spinner {
    will-change: transform;
}

.products .product,
.woocommerce ul.products li.product {
    will-change: opacity, transform;
}

/* Container Adjustments */
.infinite-scroll-container {
    position: relative;
    min-height: 200px;
}

.infinite-scroll-container.loading {
    overflow: hidden;
}

/* Status Messages */
.infinite-scroll-status {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 15px;
    border-radius: 4px;
    font-size: 14px;
    z-index: 1000;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.infinite-scroll-status.show {
    transform: translateY(0);
    opacity: 1;
}