/**
 * LingoChat.ru — Article (single blog post) styles
 * Layout: sidebar (CTA + TOC, sticky on desktop) + main content
 */

/* ============================================
   Layout
   ============================================ */
.article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 1100px) {
    .article-layout {
        grid-template-columns: 260px 1fr;
        max-width: 1100px;
        align-items: start;
    }
}

/* ============================================
   Sidebar
   ============================================ */
.article-sidebar {
    order: 2;
}

@media (min-width: 1100px) {
    .article-sidebar {
        order: 1;
        position: sticky;
        top: 88px;
        align-self: start;
    }
}

/* Sidebar CTA */
.sidebar-cta {
    background: linear-gradient(135deg, #064e3b 0%, #022c22 100%);
    border-radius: var(--radius-lg);
    padding: 1.125rem;
    margin-bottom: 1rem;
    color: #fff;
}

.sidebar-cta__head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.875rem;
}

.sidebar-cta__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(16, 185, 129, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #34d399;
}

.sidebar-cta__icon svg {
    width: 22px;
    height: 22px;
}

.sidebar-cta__text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.sidebar-cta__title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}

.sidebar-cta__sub {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 2px;
}

.sidebar-cta__btn {
    display: block;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    text-align: center;
    transition: background .15s, transform .15s, box-shadow .15s;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
}

.sidebar-cta__btn:hover {
    background: var(--color-primary-light);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.45);
}

@media (max-width: 1099px) {
    .sidebar-cta {
        display: none;
    }
}

/* Table of Contents */
.article-toc {
    background: var(--color-primary-bg);
    border: 1px solid #a7f3d0;
    border-radius: var(--radius-lg);
    padding: 1rem 1.125rem;
}

.article-toc__title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.article-toc__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.article-toc__item {
    line-height: 1.35;
}

.article-toc__item--level-3 {
    padding-left: 0.875rem;
}

.article-toc__link {
    display: block;
    font-size: 0.825rem;
    color: var(--color-text-light);
    text-decoration: none;
    padding: 0.28rem 0 0.28rem 0.75rem;
    border-left: 2px solid transparent;
    transition: color .15s, border-color .15s;
    line-height: 1.4;
}

.article-toc__link:hover {
    color: var(--color-primary-dark);
    border-left-color: var(--color-primary-light);
    text-decoration: none;
}

.article-toc__link.is-active {
    color: var(--color-primary-dark);
    border-left-color: var(--color-primary);
    font-weight: 600;
}

/* На мобиле — TOC сверху, компактнее */
@media (max-width: 1099px) {
    .article-sidebar {
        order: 1;
        margin-bottom: 1rem;
    }
    .article-toc {
        padding: 0.875rem 1rem;
    }
    .article-toc__link {
        font-size: 0.8125rem;
    }
}

/* ============================================
   Article content
   ============================================ */
.article-content {
    order: 1;
    min-width: 0;
}

@media (min-width: 1100px) {
    .article-content {
        order: 2;
    }
}

/* Featured (hero) image */
.article-hero-img {
    margin: 0 0 2rem;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--color-primary-bg), #f0f9ff);
}

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

/* Body typography */
.article-body {
    font-size: 1.0625rem;
    line-height: 1.78;
    color: var(--color-text);
}

.article-body > * {
    margin-bottom: 1.125rem;
}

.article-body > *:last-child {
    margin-bottom: 0;
}

.article-body h2 {
    font-size: clamp(1.375rem, 2.4vw, 1.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-top: 2.5rem;
    margin-bottom: 0.875rem;
    color: var(--color-text);
    scroll-margin-top: 90px;
}

.article-body h3 {
    font-size: clamp(1.125rem, 1.9vw, 1.3125rem);
    font-weight: 700;
    line-height: 1.3;
    margin-top: 1.875rem;
    margin-bottom: 0.625rem;
    color: var(--color-text);
    scroll-margin-top: 90px;
}

.article-body h2:first-child,
.article-body h3:first-child { margin-top: 0; }

.article-body p {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.article-body a {
    color: var(--color-primary-dark);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.article-body strong { font-weight: 600; color: var(--color-text); }

.article-body ul,
.article-body ol {
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
    list-style-position: outside;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
    margin-bottom: 0.5rem;
    padding-left: 0.25rem;
    line-height: 1.7;
}

.article-body li::marker { color: var(--color-primary); }

.article-body blockquote {
    border-left: 4px solid var(--color-primary);
    padding: 0.875rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--color-primary-bg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--color-text);
}

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

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1.25rem 0;
}

.article-body code {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 0.92em;
    background: var(--color-primary-bg);
    padding: 0.15em 0.4em;
    border-radius: 5px;
}

.article-body pre {
    background: var(--color-bg-dark);
    color: #e2e8f0;
    padding: 1.125rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1.25rem 0;
    font-size: 0.9rem;
}

.article-body pre code { background: transparent; padding: 0; color: inherit; }

/* Tables — horizontal scroll on mobile */
.article-body .table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.article-body table {
    width: 100%;
    min-width: 480px;
    border-collapse: collapse;
    font-size: 0.9375rem;
    margin: 0;
}

.article-body > table { margin: 1.5rem 0; }

.article-body thead {
    background: var(--color-bg-alt);
}

.article-body th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
}

.article-body td {
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.article-body tbody tr:hover { background: var(--color-primary-bg); }
.article-body tbody tr:last-child td { border-bottom: none; }

/* ============================================
   FAQ block
   ============================================ */
.article-faq {
    margin-top: 2.5rem;
    border-top: 2px solid var(--color-border);
    padding-top: 2rem;
}

.article-faq__title {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--color-text);
}

.article-faq__list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.article-faq__item {
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

.article-faq__item:last-child {
    border-bottom: none;
}

.article-faq__q {
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.article-faq__q::before {
    content: 'Q';
    position: absolute;
    left: 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary);
    top: 2px;
}

.article-faq__a {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text-light);
    margin: 0;
    padding-left: 1.5rem;
}

/* ============================================
   Inline CTA block (после статьи)
   ============================================ */
.article-cta {
    background: var(--color-primary-bg);
    border: 1px solid #a7f3d0;
    border-radius: var(--radius-xl);
    padding: 2rem 1.75rem;
    margin-top: 3rem;
    text-align: center;
}

.article-cta__icon {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    display: inline-flex;
}

.article-cta__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.article-cta__text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Related articles
   ============================================ */
.related-section {
    background: var(--color-bg-alt);
    padding: 3.5rem 0;
}

.related-section__title {
    text-align: center;
    font-size: clamp(1.375rem, 2.5vw, 1.75rem);
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--color-text);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

@media (max-width: 900px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
}

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

.related-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.375rem;
    transition: border-color .15s, transform .15s, box-shadow .15s;
}

.related-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.related-card__category {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

.related-card__title {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text);
    text-decoration: none;
    margin-bottom: 0.5rem;
}

.related-card__title:hover { color: var(--color-primary-dark); text-decoration: none; }

.related-card__meta {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}