/* Article Page Sidebar Layout
 * Controls the arrangement of TOC and Related Articles on desktop and mobile
 */

/* Desktop Layout */
.learn-container {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: var(--space-xxl);
}

/* Shared sidebar component styles */
.sidebar-toc,
.sidebar-related {
    background-color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
}

/* TOC Component */
.sidebar-toc {
    position: sticky;
    top: 100px;
    align-self: start;
    margin-bottom: var(--space-xl);
}

.sidebar-toc h3 {
    margin-top: 0;
    margin-bottom: var(--space-md);
    font-size: 1.25rem;
}

/* Table of Contents List Styles */
.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: var(--space-sm);
}

.toc-list a {
    display: block;
    padding: var(--space-xs) 0;
    color: var(--cool-slate);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.toc-list a:hover {
    color: var(--warm-red);
}

/* Related Articles Component */
.sidebar-related {
    position: sticky;
    top: calc(100px + var(--space-xxl) + 250px);
    align-self: start;
}

.sidebar-related h3 {
    margin-top: 0;
    margin-bottom: var(--space-md);
    font-size: 1.25rem;
}

/* Related Articles List Styles */
.related-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.related-list li {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--light-gray);
}

.related-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.related-list a {
    display: block;
    font-weight: 500;
    color: var(--cool-slate);
    margin-bottom: var(--space-xs);
}

.related-meta {
    font-size: 0.75rem;
    color: var(--medium-gray);
}

/* Mobile Layout (< 992px) */
@media (max-width: 992px) {
    .learn-container {
        grid-template-columns: 1fr;
    }
    
    /* TOC moves to the top */
    .sidebar-toc {
        position: static;
        margin-bottom: var(--space-xl);
        order: -1;
    }
    
    /* Related articles appear after content */
    .sidebar-related {
        position: static;
        margin-top: var(--space-xl);
        order: 1;
    }
}

/* Tablet Layout (< 768px) */
@media (max-width: 768px) {
    .article-content {
        padding: var(--space-lg);
    }
    
    .sidebar-toc, 
    .sidebar-related {
        padding: var(--space-md);
    }
    
    .sidebar-toc h3,
    .sidebar-related h3 {
        font-size: 1.15rem;
    }
}

/* Mobile Layout (< 576px) */
@media (max-width: 576px) {
    .article-content {
        padding: var(--space-sm);
        border-radius: var(--radius-sm);
    }
    
    .sidebar-toc, 
    .sidebar-related {
        padding: var(--space-md);
        border-radius: var(--radius-sm);
    }
}