/* ========================== */
/* Blog Article Page Styles   */
/* ========================== */

.article-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3.5rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

/* Sidebar TOC */
.article-toc {
    position: sticky;
    top: 100px;
    padding: 1.75rem 0;
    border-right: 1px solid var(--border);
}

.article-toc__title {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 1.25rem;
    padding-left: 1rem;
}

.article-toc__list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.article-toc__link {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
    border-left: 3px solid transparent;
    transition: all 0.25s ease;
    line-height: 1.4;
}

.article-toc__link:hover,
.article-toc__link.active {
    color: var(--primary);
    border-left-color: var(--primary);
    background: var(--primary-light);
}

/* Article Content */
.article-content {
    padding: 2rem 0 4rem;
    max-width: 780px;
}

.article-content__meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.article-content__category {
    padding: 0.25rem 0.85rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: #eff6ff;
    color: #2563eb;
}

.article-content__date,
.article-content__read {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.article-content h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    color: var(--secondary);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.article-content__intro {
    font-size: 1.15rem;
    line-height: 1.75;
    color: var(--text-main);
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.article-content h2 {
    font-size: 1.65rem;
    color: var(--secondary);
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-weight: 700;
    line-height: 1.3;
}

.article-content h2:first-of-type {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
}

.article-content h3 {
    font-size: 1.2rem;
    color: var(--secondary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.article-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-main);
    margin-bottom: 1.25rem;
    text-align: justify;
}

.article-content ul,
.article-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.article-content li {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-main);
    list-style: disc;
}

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

.article-content strong {
    color: var(--secondary);
    font-weight: 600;
}

/* Callout / highlight box */
.article-callout {
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 1.75rem 2rem;
    margin: 2rem 0;
}

.article-callout h4 {
    color: var(--primary-dark);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.article-callout p {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.article-callout p:last-child {
    margin-bottom: 0;
}

/* CTA box inside article */
.article-cta-box {
    background: linear-gradient(135deg, var(--secondary) 0%, #1e3a5f 100%);
    border-radius: 12px;
    padding: 2.5rem;
    margin: 3rem 0;
    color: white;
    position: relative;
    overflow: hidden;
}

.article-cta-box::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -15%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.article-cta-box h3 {
    color: white;
    font-size: 1.35rem;
    margin-top: 0;
    margin-bottom: 0.75rem;
}

.article-cta-box p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    text-align: left;
    margin-bottom: 1.5rem;
}

/* Sources box */
.article-sources {
    background: var(--background-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem 2rem;
    margin-top: 3rem;
}

.article-sources h4 {
    font-size: 0.95rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.article-sources ul {
    margin: 0;
    padding-left: 1.25rem;
}

.article-sources li {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Mobile TOC */
.article-toc-mobile {
    display: none;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 2rem;
    overflow: hidden;
}

.article-toc-mobile__toggle {
    width: 100%;
    padding: 1rem 1.25rem;
    background: white;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.article-toc-mobile__list {
    display: none;
    padding: 0 1.25rem 1rem;
    flex-direction: column;
    gap: 0.4rem;
}

.article-toc-mobile__list.open {
    display: flex;
}

.article-toc-mobile__list a {
    display: block;
    padding: 0.4rem 0;
    font-size: 0.875rem;
    color: var(--text-light);
    transition: color 0.2s ease;
}

.article-toc-mobile__list a:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 992px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .article-toc {
        display: none;
    }

    .article-toc-mobile {
        display: block;
    }

    .article-content h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .article-content {
        padding: 1rem 0 3rem;
    }

    .article-content h1 {
        font-size: 1.75rem;
    }

    .article-content h2 {
        font-size: 1.35rem;
    }

    .article-content p {
        font-size: 1rem;
        text-align: left;
    }

    .article-callout,
    .article-cta-box {
        padding: 1.5rem;
    }
}