/* Styles cho phần Blog */

/* Blog Hero */
.blog-hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                      url('https://images.unsplash.com/photo-1531315630201-bb15abeb1653');
    background-size: cover;
    background-position: center;
    padding: 8rem 0;
    text-align: center;
    color: var(--white);
    position: relative;
}

.blog-hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s forwards;
}

.blog-hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 1s 0.2s forwards;
    opacity: 0;
}

/* Blog Categories */
.blog-categories {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 70px;
    z-index: 90;
}

.category-tabs {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 1rem 0;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.category-tab {
    padding: 0.5rem 1.5rem;
    white-space: nowrap;
    font-weight: 600;
    color: var(--text-medium);
    position: relative;
    transition: all var(--transition-medium);
}

.category-tab::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transform: translateX(-50%);
    transition: width var(--transition-medium);
}

.category-tab:hover {
    color: var(--primary);
}

.category-tab:hover::after {
    width: 30%;
}

.category-tab.active {
    color: var(--primary);
}

.category-tab.active::after {
    width: 60%;
}

/* Blog Posts Grid */
.blog-posts-section {
    padding: 4rem 0;
    background-color: var(--gray-100);
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

/* Blog Card */
.blog-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-medium);
    opacity: 0;
    transform: translateY(20px);
}

.blog-card.card-visible {
    opacity: 1;
    transform: translateY(0);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.blog-image {
    height: 240px;
    overflow: hidden;
    position: relative;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.blog-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: var(--primary);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 3rem;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 1;
}

.blog-content {
    padding: 1.5rem;
}

.blog-date {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    display: block;
}

.blog-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.blog-card:hover .blog-title {
    color: var(--primary);
}

.blog-summary {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.blog-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.blog-author {
    color: var(--text-medium);
    font-size: 0.875rem;
}

.blog-read-more {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.blog-read-more i {
    transition: transform var(--transition-fast);
    margin-left: 0.25rem;
}

.blog-read-more:hover i {
    transform: translateX(3px);
}

/* Small Blog Card */
.blog-card.small {
    display: flex;
    height: 120px;
}

.blog-card.small .blog-image {
    width: 120px;
    height: 120px;
    flex-shrink: 0;
}

.blog-card.small .blog-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.blog-card.small .blog-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.blog-card.small .blog-date {
    font-size: 0.75rem;
    margin-bottom: 0;
}

/* Blog Detail Page */
.blog-detail {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
}

.blog-header {
    text-align: center;
    margin-bottom: 2rem;
}

.blog-header .blog-category {
    position: static;
    display: inline-block;
    margin-bottom: 1rem;
}

.blog-header .blog-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.blog-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--text-medium);
}

.blog-meta span {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
}

.blog-meta i {
    margin-right: 0.5rem;
    color: var(--primary);
}

.blog-featured-image {
    margin: 0 -2rem 2rem;
    height: 400px;
    overflow: hidden;
}

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

.blog-content {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.blog-content h3 {
    margin: 2rem 0 1rem;
    color: var(--primary-dark);
}

.blog-content p {
    margin-bottom: 1.5rem;
}

.blog-content ul, .blog-content ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.blog-content li {
    margin-bottom: 0.75rem;
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 2rem 0;
}

.blog-tag {
    background-color: var(--gray-200);
    color: var(--text-medium);
    padding: 0.3rem 0.8rem;
    border-radius: 3rem;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.blog-tag:hover {
    background-color: var(--primary-light);
    color: var(--white);
}

.blog-share {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    margin: 2rem 0;
}

.blog-share span {
    font-weight: 600;
}

.social-icons {
    display: flex;
    gap: 0.75rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--gray-200);
    color: var(--text-medium);
    transition: all var(--transition-fast);
}

.social-icon:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.blog-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
}

.blog-prev, .blog-next {
    display: flex;
    align-items: center;
    max-width: 45%;
}

.blog-prev {
    text-align: left;
}

.blog-next {
    text-align: right;
    flex-direction: row-reverse;
}

.blog-prev i, .blog-next i {
    color: var(--primary);
    font-size: 1.5rem;
    transition: transform var(--transition-fast);
}

.blog-prev:hover i {
    transform: translateX(-5px);
}

.blog-next:hover i {
    transform: translateX(5px);
}

.blog-prev span, .blog-next span {
    display: block;
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.blog-prev h4, .blog-next h4 {
    color: var(--text-dark);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.blog-prev:hover h4, .blog-next:hover h4 {
    color: var(--primary);
}

.blog-prev > div, .blog-next > div {
    margin: 0 0.75rem;
}

.related-posts h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-dark);
}

.blog-grid.related {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.error-message {
    text-align: center;
    padding: 4rem 2rem;
}

.error-message h2 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.error-message p {
    color: var(--text-medium);
    margin-bottom: 2rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments */
@media (min-width: 576px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (min-width: 768px) {
    .blog-detail {
        padding: 3rem;
    }
    
    .blog-featured-image {
        margin: 0 -3rem 3rem;
        height: 500px;
    }
}

@media (max-width: 767px) {
    .blog-hero-content h1 {
        font-size: 2rem;
    }
    
    .blog-meta {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .blog-header .blog-title {
        font-size: 1.8rem;
    }
}

/* Blog detail content specific styles */
.blog-content strong {
    color: var(--primary-dark);
    font-weight: 600;
}

.blog-content a {
    color: var(--primary);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.blog-content a:hover {
    color: var(--primary-dark);
}

.blog-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-medium);
}

.blog-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}