/* Reset CSS */
html, body {
    width: 100%;
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
}

#content {
    flex: 1 0 auto;
    min-height: calc(100vh - 200px); /* Trừ đi chiều cao của header và footer */
    display: flex;
    flex-direction: column;
}

#site-footer {
    flex-shrink: 0;
    margin-top: auto;
}

* {
    box-sizing: border-box;
}

a {
    text-decoration: none;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Featured Posts */
.frontpage-content {
    max-width: 1400px;
    margin: 0 auto;
}

.featured-posts {
    margin-bottom: 40px;
}

.featured-posts .section-title {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.post-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.post-item:hover {
    transform: translateY(-5px);
}

.post-image-wrapper {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.post-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.post-item:hover .post-image-wrapper img {
    transform: scale(1.1);
}

.post-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 15px;
    line-height: 1.4;
}

.post-excerpt {
    font-size: 14px;
    color: #666;
    margin: 0 15px 15px;
    line-height: 1.6;
}

.post-categories {
    padding: 0 15px 15px;
}

.category-link {
    display: inline-block;
    padding: 4px 12px;
    background: #f5f5f5;
    color: #666;
    border-radius: 15px;
    font-size: 12px;
    margin-right: 5px;
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

.category-link:hover {
    background: #0073aa;
    color: #fff;
}

/* Category Page */
.category-title {
    font-size: 32px;
    font-weight: 600;
    color: #333;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

/* Mobile Styles */
@media (max-width: 1200px) {
    .post-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .post-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-posts .section-title,
    .category-title {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .post-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .post-title {
        font-size: 13px;
    }
    
    .post-excerpt {
        font-size: 12px;
    }
    
    .post-image-wrapper {
        height: 160px;
    }
}