/* ==========================================================================
   Insight Single Page — Article Detail Styles
   ========================================================================== */

/* Hero — matches page-hero structure */
.article-hero {
    padding-top: 160px;
    padding-bottom: 80px;
    position: relative;
    background: linear-gradient(135deg, var(--color-secondary-bg) 0%, var(--color-primary-bg) 60%, #0c1a6e 100%);
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -100px;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 253, 0.15);
    pointer-events: none;
}

.article-hero::after {
    content: '';
    position: absolute;
    bottom: -120px;
    right: 80px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 253, 0.1);
    pointer-events: none;
}

.article-hero .page-hero-overlay {
    position: absolute;
    inset: 0;
    background: url('../images/hero-bg.jpg') center/cover no-repeat;
    opacity: 0.08;
    z-index: 0;
}

.article-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 860px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 2rem;
    transition: color 0.2s ease, gap 0.2s ease;
}

.back-link:hover {
    color: var(--color-white);
    gap: 12px;
}

.article-cat {
    display: inline-block;
    background: rgba(0, 0, 253, 0.12);
    color: var(--color-accent);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 6px 14px;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 253, 0.25);
    margin-bottom: 1.5rem;
}

.article-hero-inner h1 {
    font-size: 40px;
    color: var(--color-white);
    line-height: 1.25;
    margin-bottom: 2rem;
    max-width: 780px;
}

.article-hero-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.article-author-chip {
    display: flex;
    align-items: center;
    gap: 12px;
}

.article-av {
    width: 44px;
    height: 44px;
    background: rgba(0, 0, 253, 0.2);
    border: 2px solid rgba(0, 0, 253, 0.4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    flex-shrink: 0;
}

.article-av-name {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-white);
}

.article-av-role {
    display: block;
    font-size: 12px;
    color: var(--text-muted-dark);
    margin-top: 2px;
}

.article-meta-pills {
    display: flex;
    gap: 20px;
}

.article-meta-pills span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 500;
}

.article-meta-pills span svg {
    opacity: 0.7;
}

/* Cover Image */
.article-cover {
    margin-top: 0;
    margin-bottom: 0;
    background: var(--color-light-bg);
}

.article-cover .container {
    padding-top: 0;
    padding-bottom: 0;
}

.article-cover img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    display: block;
}

/* ==========================================================================
   Article Layout (content + sidebar)
   ========================================================================== */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 64px;
    align-items: start;
    padding: 4rem 0;
}

/* ==========================================================================
   Article Content Typography
   ========================================================================== */
.article-content {
    max-width: 720px;
}

.article-lead p {
    font-size: 18px;
    color: var(--text-primary-light);
    line-height: 1.8;
    font-weight: 500;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-light);
}

.article-content h2 {
    font-size: 24px;
    color: var(--text-primary-light);
    margin-top: 3rem;
    margin-bottom: 1.2rem;
    line-height: 1.35;
}

.article-content h2:first-of-type {
    margin-top: 0;
}

.article-content p {
    color: var(--text-muted-light);
    font-size: 16px;
    line-height: 1.85;
    margin-bottom: 1.5rem;
}

.article-content ul {
    margin: 1rem 0 2rem 1.5rem;
    color: var(--text-muted-light);
    font-size: 15px;
    line-height: 1.8;
}

.article-content ul li {
    margin-bottom: 0.5rem;
    padding-left: 4px;
}

.article-content ul li::marker {
    color: var(--color-accent);
}

/* Phases cards */
.article-phases {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 2rem 0 2.5rem;
}

.phase-card {
    background: var(--color-light-bg);
    border: 1px solid var(--border-light);
    padding: 24px 20px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.phase-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.phase-num {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.35;
    margin-bottom: 8px;
}

.phase-card h4 {
    font-size: 15px;
    color: var(--text-primary-light);
    margin-bottom: 8px;
}

.phase-card p {
    font-size: 13px !important;
    color: var(--text-muted-light);
    line-height: 1.65 !important;
    margin-bottom: 0 !important;
}

/* Blockquote */
.article-content blockquote {
    margin: 2.5rem 0;
    padding: 28px 32px;
    border-left: 4px solid var(--color-accent);
    background: var(--color-light-bg);
}

.article-content blockquote p {
    font-size: 17px;
    font-style: italic;
    color: var(--text-primary-light);
    font-weight: 500;
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.article-content blockquote cite {
    font-size: 13px;
    color: var(--text-muted-light);
    font-style: normal;
    font-weight: 600;
}

/* Inline CTA */
.article-cta-box {
    background: var(--color-primary-bg);
    padding: 36px 32px;
    margin: 3rem 0;
    text-align: center;
}

.article-cta-box h3 {
    font-size: 20px;
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.article-cta-box p {
    color: var(--text-muted-dark) !important;
    font-size: 14px !important;
    margin-bottom: 1.5rem !important;
}

/* Tags */
.article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin: 2.5rem 0;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border-light);
}

.tag-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary-light);
    margin-right: 4px;
}

.article-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted-light);
    background: var(--color-light-bg);
    border: 1px solid var(--border-light);
    padding: 5px 12px;
    border-radius: 4px;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.article-tag:hover {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* Share */
.article-share {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-top: 1.5rem;
    padding-bottom: 1rem;
}

.share-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary-light);
}

.share-buttons {
    display: flex;
    gap: 8px;
}

.share-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-light-bg);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    color: var(--text-muted-light);
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.share-btn:hover {
    background: var(--color-primary-bg);
    color: var(--color-white);
    border-color: var(--color-primary-bg);
    transform: translateY(-2px);
}

/* ==========================================================================
   Sidebar (article page)
   ========================================================================== */
.article-sidebar {
    position: sticky;
    top: 110px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.article-sidebar .sidebar-card {
    background: var(--color-white);
    border: 1px solid var(--border-light);
}

.article-sidebar .sidebar-card h4 {
    color: var(--text-primary-light);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--border-light);
}

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

.toc-list li {
    counter-increment: toc;
}

.toc-link {
    display: block;
    padding: 8px 0 8px 0;
    font-size: 14px;
    color: var(--text-muted-light);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.toc-link::before {
    content: counter(toc) ". ";
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.5;
    margin-right: 4px;
}

.toc-link:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

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

/* Related articles */
.related-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.related-item {
    display: flex;
    gap: 12px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.related-item:hover {
    opacity: 0.8;
}

.related-item img {
    width: 64px;
    height: 52px;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border-light);
}

.related-cat {
    display: block;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 3px;
}

.related-title {
    display: block;
    font-size: 13px;
    color: var(--text-primary-light);
    line-height: 1.4;
    font-weight: 500;
}

/* Sidebar CTA override for light bg */
.article-sidebar .sidebar-cta {
    background: var(--color-primary-bg);
    border-color: var(--color-primary-bg);
    text-align: center;
}

.article-sidebar .sidebar-cta h4 {
    color: var(--color-white);
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0.75rem;
}

.article-sidebar .sidebar-cta p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.article-sidebar .sidebar-cta-btn {
    width: 100%;
    justify-content: center;
    font-size: 13px;
    padding: 12px 16px;
}

/* ==========================================================================
   Previous / Next Navigation
   ========================================================================== */
.article-nav-section {
    border-top: 1px solid var(--border-subtle);
}

.article-nav-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.article-nav-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 40px 36px;
    text-decoration: none;
    transition: background 0.25s ease;
}

.article-nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.article-nav-prev {
    border-right: 1px solid var(--border-subtle);
}

.article-nav-next {
    text-align: right;
    align-items: flex-end;
}

.article-nav-dir {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

.article-nav-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.4;
    max-width: 360px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr 260px;
        gap: 40px;
    }
}

@media (max-width: 900px) {
    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
    }

    .article-hero-inner h1 {
        font-size: 28px;
    }

    .article-nav-grid {
        grid-template-columns: 1fr;
    }

    .article-nav-prev {
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
    }

    .article-nav-next {
        text-align: left;
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    .article-phases {
        grid-template-columns: 1fr;
    }

    .article-hero-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .article-cover img {
        max-height: 260px;
    }
}