/* OPTIMIZED LOADING STYLES - Professional lazy loading and animations */

/* Loading States */
.optimized-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    font-size: 1.2rem;
    font-weight: 500;
    color: #128c7e;
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.1), rgba(18, 140, 126, 0.1));
    border-radius: 12px;
    margin: 1rem 0;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.1);
    position: relative;
    overflow: hidden;
}

.optimized-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

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

/* Lazy Card Animations */
.lazy-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    animation-delay: var(--stagger-delay, 0ms);
}

.lazy-card.visible {
    opacity: 1;
    transform: translateY(0);
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Image Placeholder and Lazy Loading */
.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    border-radius: 8px 8px 0 0;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
}

.image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.1), rgba(18, 140, 126, 0.1));
    z-index: 1;
    transition: opacity 0.3s ease;
}

.image-placeholder i {
    font-size: 3rem;
    color: #25d366;
    opacity: 0.5;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.lazy-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.4s ease;
    position: relative;
    z-index: 2;
}

.lazy-image.loaded {
    opacity: 1;
}

/* Enhanced Group Card Styles */
.group-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #f0f0f0;
    position: relative;
}

.group-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(37, 211, 102, 0.2);
    border-color: #25d366;
}

.group-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #25d366, #128c7e);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.group-card:hover::before {
    transform: scaleX(1);
}

/* Badge Enhancements */
.group-badges {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    z-index: 3;
}

.category-badge, .country-badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
}

.category-badge {
    background: rgba(37, 211, 102, 0.9);
    color: white;
}

.country-badge {
    background: rgba(0, 0, 0, 0.7);
    color: white;
}

.category-badge:hover, .country-badge:hover {
    transform: scale(1.05);
}

/* Card Content */
.card-title {
    margin: 1rem 1rem 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-description {
    margin: 0 1rem 1rem;
    color: #666;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Enhanced Join Button */
.card-actions {
    padding: 0 1rem 1rem;
}

.join-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #25d366, #128c7e);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.join-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.join-btn:hover::before {
    left: 100%;
}

.join-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
    background: linear-gradient(135deg, #128c7e, #25d366);
}

.join-btn:active {
    transform: translateY(0);
}

/* Card Footer */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem 1rem;
    font-size: 0.85rem;
    color: #888;
}

.views-count {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.views-count i {
    color: #25d366;
}

/* Load More Button Enhancement */
.load-more-btn.optimized {
    background: linear-gradient(135deg, #25d366, #128c7e);
    border: none;
    color: white;
    padding: 1rem 2rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
    position: relative;
    overflow: hidden;
}

.load-more-btn.optimized::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.load-more-btn.optimized:hover::before {
    left: 100%;
}

.load-more-btn.optimized:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4);
}

.load-more-btn.optimized:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Error State Enhancement */
.error-state {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1), rgba(255, 107, 107, 0.1));
    border-radius: 12px;
    margin: 2rem 0;
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.error-state h3 {
    color: #dc3545;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.error-state p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.retry-btn {
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 53, 69, 0.3);
}

/* No Groups State */
.no-groups {
    text-align: center;
    padding: 3rem 2rem;
    color: #666;
    font-size: 1.1rem;
}

.no-groups a {
    color: #25d366;
    text-decoration: none;
    font-weight: 600;
}

.no-groups a:hover {
    text-decoration: underline;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .optimized-loading {
        padding: 2rem 1rem;
        font-size: 1rem;
    }
    
    .lazy-card {
        margin-bottom: 1rem;
    }
    
    .card-image {
        height: 180px;
    }
    
    .image-placeholder i {
        font-size: 2.5rem;
    }
    
    .card-title {
        font-size: 1.1rem;
    }
    
    .load-more-btn.optimized {
        width: 100%;
        max-width: 300px;
        padding: 1rem;
    }
}

/* SKELETON LOADING ANIMATION - Beautiful lazy loading */
/* NOTE: Skeleton cards now work as individual items in the existing groups-grid */

/* Skeleton cards now inherit grid behavior from groups-grid container */

.skeleton-card {
    background: white;
    border-radius: 12px;
    padding: 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    position: relative;
    border: 1px solid #f0f0f0;
    animation: skeletonPulse 1.5s ease-in-out infinite alternate;
    
    /* Make skeleton cards work as individual grid items */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.skeleton-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.8),
        transparent
    );
    animation: shimmerSkeleton 2s infinite;
    z-index: 1;
}

@keyframes shimmerSkeleton {
    0% { left: -100%; }
    100% { left: 100%; }
}

@keyframes skeletonPulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0.8;
        transform: scale(0.98);
    }
}

.skeleton-image {
    height: 200px;
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0, #f0f0f0);
    background-size: 400% 400%;
    animation: gradientShift 3s ease infinite;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skeleton-image::after {
    content: '📱';
    font-size: 3rem;
    opacity: 0.3;
    animation: float 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.skeleton-content {
    padding: 1.5rem;
}

.skeleton-badges {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.skeleton-badge {
    height: 20px;
    border-radius: 12px;
    background: linear-gradient(90deg, #e0e0e0, #f0f0f0, #e0e0e0);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s infinite;
}

.skeleton-badge:first-child {
    width: 80px;
}

.skeleton-badge:last-child {
    width: 60px;
}

.skeleton-title {
    height: 24px;
    background: linear-gradient(90deg, #e0e0e0, #f0f0f0, #e0e0e0);
    background-size: 200% 100%;
    border-radius: 6px;
    margin-bottom: 1rem;
    animation: skeletonShimmer 1.5s infinite;
    animation-delay: 0.1s;
}

.skeleton-description {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.skeleton-line {
    height: 16px;
    background: linear-gradient(90deg, #e0e0e0, #f0f0f0, #e0e0e0);
    background-size: 200% 100%;
    border-radius: 4px;
    animation: skeletonShimmer 1.5s infinite;
}

.skeleton-line:nth-child(1) {
    width: 100%;
    animation-delay: 0.2s;
}

.skeleton-line:nth-child(2) {
    width: 85%;
    animation-delay: 0.3s;
}

.skeleton-line:nth-child(3) {
    width: 60%;
    animation-delay: 0.4s;
}

.skeleton-button {
    height: 44px;
    background: linear-gradient(90deg, 
        rgba(37, 211, 102, 0.3), 
        rgba(37, 211, 102, 0.5), 
        rgba(37, 211, 102, 0.3)
    );
    background-size: 200% 100%;
    border-radius: 8px;
    margin-bottom: 1rem;
    animation: skeletonShimmer 1.5s infinite;
    animation-delay: 0.5s;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.skeleton-button::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-top: 2px solid rgba(37, 211, 102, 0.8);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.skeleton-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skeleton-views, .skeleton-date {
    height: 14px;
    background: linear-gradient(90deg, #e0e0e0, #f0f0f0, #e0e0e0);
    background-size: 200% 100%;
    border-radius: 3px;
    animation: skeletonShimmer 1.5s infinite;
}

.skeleton-views {
    width: 70px;
    animation-delay: 0.6s;
}

.skeleton-date {
    width: 80px;
    animation-delay: 0.7s;
}

@keyframes skeletonShimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

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

/* Responsive skeleton loading - MATCH YOUR MOBILE 2-COLUMN LAYOUT */

/* Small tablets (596px to 767px) - 2 columns */
@media (min-width: 596px) and (max-width: 767px) {
    .skeleton-loader {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 1rem 0;
    }
    
    .skeleton-image {
        height: 180px;
    }
    
    .skeleton-content {
        padding: 1rem;
    }
}

/* Mobile skeleton cards - inherit groups-grid layout */
@media screen and (max-width: 595px) {
    .skeleton-card {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        box-sizing: border-box !important;
        height: 220px;
        padding: 0.3rem;
    }
    
    .skeleton-image {
        height: 60px; /* Compact mobile height */
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .skeleton-image::after {
        font-size: 2rem; /* Smaller mobile icon */
        opacity: 0.5;
    }
    
    .skeleton-content {
        padding: 0.5rem;
    }
    
    .skeleton-title {
        height: 18px;
        margin-bottom: 0.5rem;
    }
    
    .skeleton-line {
        height: 12px;
        margin-bottom: 0.3rem;
    }
    
    .skeleton-button {
        height: 32px;
        margin-bottom: 0.5rem;
    }
    
    .skeleton-badge {
        height: 16px;
    }
    
    .skeleton-views, .skeleton-date {
        height: 10px;
    }
}

/* Very small devices (up to 380px) - MATCH YOUR LAYOUT */
@media (max-width: 380px) {
    .skeleton-loader {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 2px !important;
        padding: 1rem 2px !important;
        max-width: 100% !important;
        overflow-x: hidden !important;
    }
    
    .skeleton-card {
        height: 220px;
        padding: 0.3rem;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        box-sizing: border-box;
        margin: 0;
    }
    
    .skeleton-image {
        height: 50px;
    }
    
    .skeleton-image::after {
        font-size: 1.5rem;
    }
    
    .skeleton-content {
        padding: 0.4rem;
    }
    
    .skeleton-title {
        height: 16px;
        margin-bottom: 0.4rem;
    }
    
    .skeleton-line {
        height: 10px;
        margin-bottom: 0.25rem;
    }
    
    .skeleton-button {
        height: 28px;
        margin-bottom: 0.4rem;
    }
    
    .skeleton-badge {
        height: 14px;
    }
    
    .skeleton-views, .skeleton-date {
        height: 8px;
    }
}

/* Beautiful loading message */
.beautiful-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.05), rgba(18, 140, 126, 0.05));
    border-radius: 20px;
    margin: 2rem auto;
    max-width: 400px;
    position: relative;
    overflow: hidden;
}

/* Mobile responsive beautiful loading */
@media (max-width: 595px) {
    .beautiful-loading {
        padding: 2rem 1rem;
        margin: 1rem auto;
        max-width: 90%;
        border-radius: 15px;
    }
    
    .loading-icon {
        font-size: 2.5rem !important;
        margin-bottom: 0.8rem !important;
    }
    
    .loading-text {
        font-size: 1rem !important;
        margin-bottom: 0.3rem !important;
    }
    
    .loading-subtext {
        font-size: 0.8rem !important;
    }
}

.beautiful-loading::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #25d366, #128c7e, #25d366, #128c7e);
    background-size: 400% 400%;
    border-radius: 20px;
    z-index: -1;
    animation: gradientBorder 3s ease infinite;
}

@keyframes gradientBorder {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.loading-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

.loading-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: #128c7e;
    margin-bottom: 0.5rem;
}

.loading-subtext {
    font-size: 0.9rem;
    color: #666;
    opacity: 0.8;
}

.loading-dots {
    display: inline-flex;
    gap: 0.3rem;
    margin-left: 0.5rem;
}

.loading-dots .dot {
    width: 6px;
    height: 6px;
    background: #25d366;
    border-radius: 50%;
    animation: dotPulse 1.4s infinite ease-in-out;
}

.loading-dots .dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dots .dot:nth-child(2) { animation-delay: -0.16s; }
.loading-dots .dot:nth-child(3) { animation-delay: 0s; }

@keyframes dotPulse {
    0%, 80%, 100% {
        transform: scale(0.5);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Performance optimizations */
.lazy-card * {
    will-change: auto;
}

.lazy-card.visible * {
    will-change: unset;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .lazy-card,
    .lazy-image,
    .join-btn,
    .load-more-btn.optimized {
        transition: none;
        animation: none;
    }
    
    .optimized-loading::before,
    .join-btn::before,
    .load-more-btn.optimized::before {
        display: none;
    }
}