.doc-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 20px;
    max-width: 1500px;
    margin: 0 auto;
    padding: 0;
}

.doc-sidebar {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0 12px 12px 0;
    padding: 24px 10px;
    height: fit-content;
    position: sticky;
    top: 20px;
}

.doc-sidebar-title {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.doc-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.doc-nav-item {
    display: block;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 14px;
    line-height: 1.5;
}

.doc-nav-item:hover {
    background: rgba(102, 126, 234, 0.2);
    color: #fff;
}

.doc-nav-item.active {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    color: #fff;
    font-weight: 500;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 160px;
    gap: 20px;
}

.doc-main {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 40px 10px;
    min-height: 60vh;
}

.article-main {
    min-width: 0;
}

.article-sidebar {
    height: fit-content;
    position: sticky;
    top: 20px;
}

.article-toc {
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-toc-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.article-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-toc-list li {
    margin-bottom: 10px;
}

.article-toc-list a {
    color: #aaa;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
    display: block;
    padding: 4px 0;
}

.article-toc-list a:hover {
    color: #667eea;
}

.article-toc-list a.active {
    color: #667eea;
    font-weight: 600;
    position: relative;
}

.article-toc-list a.active::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: #667eea;
    border-radius: 2px;
}

.article-toc-list .toc-h3 {
    padding-left: 16px;
    font-size: 13px;
}

.article-header {
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.article-title {
    font-size: 2rem;
    color: #fff;
    margin: 0 0 16px 0;
    font-weight: 600;
}

.article-content {
    padding: 0 20px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.5rem;
    color: #fff;
    margin: 40px 0 20px 0;
    font-weight: 600;
}

.article-content h3 {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 30px 0 16px 0;
    font-weight: 500;
}

.article-content p {
    margin: 16px 0;
    color: #BBBBBB;
}

.article-content ul,
.article-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.article-content li {
    margin: 8px 0;
    color: #BBBBBB;
}

.article-content a {
    color: inherit;
    text-decoration: underline;
}

.article-content a:hover {
    color: #bbb;
}

.article-content .images-row {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    max-width: 100%;
}

.article-content .images-row img {
    flex: 1;
    margin: 0;
    max-width: 50%;
    max-height: 300px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-content .single-image {
    width: 100%;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: 24px 0;
}

@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .article-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .doc-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .doc-sidebar {
        position: static;
        padding: 16px;
    }

    .doc-main {
        padding: 24px;
    }

    .article-content .images-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .article-title {
        font-size: 1.5rem;
    }

    .article-content h2 {
        font-size: 1.3rem;
    }

    .article-content h3 {
        font-size: 1.1rem;
    }
}