/* ==========================================================================
   BLOG CSS (Kế thừa từ style.css)
   ========================================================================== */

/* --- BLOG HERO --- */
.blog-hero {
    padding: 120px 0 60px;
    background: linear-gradient(to bottom, #FFFFFF 0%, var(--clr-bg-tertiary) 100%);
    text-align: center;
}

.blog-hero .section-title {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.blog-hero .section-desc {
    max-width: 700px;
}

/* --- FILTER BAR --- */
.blog-filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.blog-categories {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.blog-search {
    position: relative;
    max-width: 300px;
    width: 100%;
}

.blog-search input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    border-radius: 50px;
    border: 1px solid var(--clr-border);
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.blog-search input:focus {
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(197, 157, 95, 0.1);
}

.blog-search i {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--clr-text-light);
}

/* --- BLOG GRID --- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.blog-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.blog-card-img {
    aspect-ratio: 16/9;
    overflow: hidden;
    position: relative;
}

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

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

.blog-card-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--clr-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
}

.blog-card-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--clr-text-secondary);
    margin-bottom: 12px;
}

.blog-card-meta i {
    color: var(--clr-primary);
}

.blog-card-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-card-title a {
    color: var(--clr-text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.blog-card-excerpt {
    color: var(--clr-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex: 1;
}

.blog-card-readmore {
    color: var(--clr-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.blog-card-readmore:hover {
    gap: 10px;
}

/* --- PAGINATION --- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--clr-border);
    border-radius: 8px;
    background: white;
    color: var(--clr-text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover:not(:disabled) {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.page-btn.active {
    background: var(--clr-primary);
    color: white;
    border-color: var(--clr-primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================================================
   ARTICLE PAGE (Trang chi tiết bài viết)
   ========================================================================== */
.article-page {
    padding-top: 100px;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: var(--clr-text-secondary);
}

.breadcrumb a {
    color: var(--clr-text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--clr-primary);
}

.breadcrumb .separator {
    margin: 0 8px;
    font-size: 0.8rem;
}

/* Article Layout */
.article-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
}

.article-category {
    display: inline-block;
    color: var(--clr-primary);
    background: var(--clr-bg-tertiary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.article-title {
    font-size: 2.5rem;
    line-height: 1.3;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--clr-text-secondary);
    font-size: 0.95rem;
}

.article-featured-image {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto 50px;
    border-radius: 20px;
    overflow: hidden;
}

.article-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Article Content (Typography tối ưu đọc) */
.article-content {
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--clr-text-primary);
}

.article-content h2, 
.article-content h3, 
.article-content h4 {
    margin: 2em 0 1em;
    font-family: var(--font-heading);
}

.article-content h2 { font-size: 1.8rem; }
.article-content h3 { font-size: 1.5rem; }

.article-content p {
    margin-bottom: 1.5em;
}

.article-content img {
    max-width: 100%;
    border-radius: 12px;
    margin: 2em 0;
}

.article-content blockquote {
    border-left: 4px solid var(--clr-primary);
    padding-left: 20px;
    margin: 2em 0;
    font-style: italic;
    color: var(--clr-text-secondary);
    background: var(--clr-bg-tertiary);
    padding: 20px;
    border-radius: 0 12px 12px 0;
}

.article-content ul, .article-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

.article-content li {
    margin-bottom: 0.5em;
}

/* Tags & Share */
.article-footer {
    max-width: 720px;
    margin: 50px auto;
    padding-top: 30px;
    border-top: 1px solid var(--clr-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.article-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag-chip {
    background: var(--clr-bg-alt);
    color: var(--clr-text-secondary);
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.tag-chip:hover {
    background: var(--clr-primary);
    color: white;
}

.article-share {
    display: flex;
    align-items: center;
    gap: 15px;
}

.article-share span {
    font-weight: 600;
    font-size: 0.95rem;
}

.share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--clr-bg-alt);
    color: var(--clr-text-primary);
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.share-btn:hover {
    background: var(--clr-primary);
    color: white;
    transform: translateY(-2px);
}

/* Related Posts */
.related-posts {
    background: var(--clr-bg-alt);
    padding: 80px 0;
    margin-top: 60px;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .article-title {
        font-size: 2rem;
    }
    
    .blog-filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .blog-search {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .article-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}