/* ========================================
   Content Section Layout
======================================== */
.content-section {
    padding: var(--spacing-xl) 0;
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-lg);
    align-items: start;
}

/* ========================================
   Article Detail
======================================== */
.article-detail {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.article-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
}

.article-title-text {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

.article-meta-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    font-size: var(--font-sm);
    color: var(--text-muted);
    flex-wrap: wrap;
}

.meta-date, .meta-source, .meta-views {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Article Content */
.article-content {
    font-size: var(--font-base);
    line-height: 1.9;
    color: var(--text-primary);
}

.article-content h2 {
    font-size: var(--font-xl);
    font-weight: 700;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-sm);
    border-left: 4px solid var(--primary);
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: var(--spacing-md);
    /*text-indent: 2em;*/
}

.article-content ul, .article-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

/* Article Tags */
.article-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.tag-label {
    font-size: var(--font-sm);
    color: var(--text-muted);
}

.content-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary-lighter);
    color: var(--primary);
    border-radius: 20px;
    font-size: var(--font-xs);
    transition: all var(--transition-fast);
}

.content-tag:hover {
    background: var(--primary);
    color: #FFFFFF;
    transform: translateY(-2px);
}

.article-content p img{
   margin: 0 auto;
}

/* ========================================
   Prev/Next Navigation
======================================== */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.nav-prev, .nav-next {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.nav-prev {
    justify-content: flex-start;
}

.nav-next {
    justify-content: flex-end;
    text-align: right;
}

.nav-arrow {
    font-size: 20px;
    color: var(--primary);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.nav-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.nav-label {
    font-size: var(--font-xs);
    color: var(--text-muted);
    margin-bottom: 2px;
}

.nav-title-text {
    font-size: var(--font-sm);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--transition-fast);
}

/* Hover animation */
.nav-prev:hover {
    background: var(--primary-lighter);
    transform: translateX(-4px);
}

.nav-prev:hover .nav-arrow {
    transform: translateX(-4px);
}

.nav-next:hover {
    background: var(--primary-lighter);
    transform: translateX(4px);
}

.nav-next:hover .nav-arrow {
    transform: translateX(4px);
}

.nav-prev:hover .nav-title-text,
.nav-next:hover .nav-title-text {
    color: var(--primary);
}

/* ========================================
   Sidebar - Related Articles
======================================== */
.related-list li {
    border-bottom: 1px solid var(--border-color);
}

.related-list li:last-child {
    border-bottom: none;
}

.related-link {
    display: block;
    padding: var(--spacing-sm) 0;
    font-size: var(--font-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    transition: all var(--transition-fast);
    position: relative;
    padding-left: var(--spacing-md);
}

.related-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border-color);
    transition: all var(--transition-fast);
}

.related-link:hover {
    color: var(--primary);
    padding-left: calc(var(--spacing-md) + 4px);
}

.related-link:hover::before {
    background: var(--primary);
    width: 8px;
    height: 8px;
}

/* ========================================
   Responsive - Tablet (≤960px)
======================================== */
@media (max-width: 960px) {
    .content-layout {
        grid-template-columns: 1fr;
    }

    /* Sidebar moves to top on tablet */
    .content-sidebar {
        order: -1;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .article-title-text {
        font-size: var(--font-xl);
    }
}

/* ========================================
   Responsive - Mobile (≤640px)
======================================== */
@media (max-width: 640px) {
    .content-layout {
        gap: var(--spacing-md);
    }

    .article-detail {
        padding: var(--spacing-lg);
    }

    .article-title-text {
        font-size: var(--font-lg);
    }

    .article-meta-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .content-sidebar {
        grid-template-columns: 1fr;
    }

    .article-nav {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .nav-prev, .nav-next {
        padding: var(--spacing-md);
    }

    .nav-title-text {
        font-size: var(--font-xs);
    }
}