/* Article detail page — layout, components, and responsive styles */

/* ─── Page Layout ─────────────────────────────────────────────── */
.article-page-wrap {
    display: grid;
    grid-template-columns: 1fr 272px;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 112px 40px 80px;
    align-items: start;
}

/* ─── Article Main Column ─────────────────────────────────────── */
.article-main {
    min-width: 0;
}

/* ─── Breadcrumb ──────────────────────────────────────────────── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-light);
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-light);
    transition: color 0.2s;
}

.breadcrumb a:hover {
    color: var(--primary-solid);
}

.breadcrumb .sep {
    color: var(--border-color);
    font-size: 0.72rem;
}

.breadcrumb .current {
    color: var(--text-main);
    font-weight: 500;
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ─── Article Header (injected by article-recommend.js) ───────── */
.article-header {
    margin-bottom: 44px;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.article-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.74rem;
    font-weight: 600;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-solid);
    letter-spacing: 0.03em;
}

.article-tag.latest {
    background: var(--primary-gradient);
    color: #fff;
}

.article-header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-dark);
    margin-bottom: 18px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.article-meta i {
    margin-right: 5px;
    color: var(--primary-solid);
    font-size: 0.8rem;
}

.article-summary {
    font-size: 1.02rem;
    line-height: 1.75;
    color: var(--text-light);
    padding: 16px 20px;
    background: var(--bg-gray);
    border-left: 3px solid var(--primary-solid);
    border-radius: 0 8px 8px 0;
}

/* ─── Article Body ────────────────────────────────────────────── */
.article-body {
    font-size: 1.03rem;
    line-height: 1.9;
    color: var(--text-main);
}

.article-body h2 {
    font-family: var(--font-heading);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 52px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
    scroll-margin-top: 90px;
}

.article-body h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 36px 0 14px;
    scroll-margin-top: 90px;
}

.article-body p {
    margin: 0 0 18px;
}

.article-body ul,
.article-body ol {
    padding-left: 1.6em;
    margin: 0 0 18px;
    list-style: disc;
}

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

.article-body li {
    margin-bottom: 8px;
    line-height: 1.75;
}

.article-body strong {
    font-weight: 700;
    color: var(--text-dark);
}

.article-body a {
    color: var(--primary-solid);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s;
}

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

/* Code blocks */
.article-body pre {
    background: #1e1e2e;
    color: #cdd6f4;
    border-radius: 10px;
    padding: 20px 24px;
    overflow-x: auto;
    font-size: 0.875rem;
    line-height: 1.75;
    margin: 0 0 24px;
}

.article-body code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.875em;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-solid);
    padding: 2px 6px;
    border-radius: 4px;
}

.article-body pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

/* Tables */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 24px;
    font-size: 0.92rem;
    display: block;
    overflow-x: auto;
}

.article-body th {
    background: var(--bg-gray);
    font-weight: 700;
    padding: 10px 16px;
    text-align: left;
    border: 1px solid var(--border-color);
    white-space: nowrap;
    color: var(--text-dark);
}

.article-body td {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    vertical-align: top;
}

.article-body tr:nth-child(even) td {
    background: rgba(248, 249, 250, 0.7);
}

/* Callout / info boxes */
.callout {
    border-radius: 10px;
    padding: 16px 20px;
    margin: 0 0 22px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.callout-icon {
    flex-shrink: 0;
    font-size: 1rem;
    margin-top: 3px;
}

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

.callout-tip {
    background: rgba(16, 185, 129, 0.08);
    border-left: 3px solid #10b981;
}

.callout-tip .callout-icon { color: #10b981; }

.callout-warning {
    background: rgba(245, 158, 11, 0.08);
    border-left: 3px solid #f59e0b;
}

.callout-warning .callout-icon { color: #f59e0b; }

.callout-info {
    background: rgba(99, 102, 241, 0.08);
    border-left: 3px solid var(--primary-solid);
}

.callout-info .callout-icon { color: var(--primary-solid); }

/* ─── Product Recommend Block ─────────────────────────────────── */
.product-recommend {
    margin: 64px 0 48px;
    padding: 40px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(67, 56, 202, 0.03) 100%);
    border: 1px solid rgba(99, 102, 241, 0.18);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}

.product-recommend::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
}

.product-recommend-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.product-recommend-logo {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    object-fit: contain;
    flex-shrink: 0;
}

.product-recommend-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-dark);
}

.product-recommend-subtitle {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 3px;
}

.product-recommend-desc {
    font-size: 0.98rem;
    line-height: 1.75;
    color: var(--text-main);
    margin-bottom: 24px;
}

.product-recommend-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 10px;
    margin-bottom: 28px;
}

.product-recommend-feature {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--text-main);
    line-height: 1.5;
}

.product-recommend-feature i {
    color: #10b981;
    font-size: 0.875rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.product-recommend-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 30px;
    background: var(--primary-gradient);
    color: #fff !important;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.98rem;
    text-decoration: none !important;
    transition: opacity 0.2s, transform 0.2s;
}

.product-recommend-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* ─── Prev / Next Navigation ──────────────────────────────────── */
.article-nav-prev-next {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 0 0 48px;
}

.article-nav-item {
    padding: 20px 22px;
    background: var(--bg-gray);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s, box-shadow 0.2s;
    text-decoration: none;
    display: block;
    color: inherit;
}

.article-nav-item:hover {
    border-color: rgba(99, 102, 241, 0.38);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.09);
    text-decoration: none;
}

.article-nav-item.nav-disabled {
    opacity: 0.35;
    pointer-events: none;
}

.article-nav-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-nav-label i {
    color: var(--primary-solid);
}

.article-nav-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 10px;
}

.article-nav-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.article-nav-tag {
    font-size: 0.68rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary-solid);
    font-weight: 600;
}

.article-nav-item.nav-next .article-nav-label {
    justify-content: flex-end;
}

.article-nav-item.nav-next .article-nav-title {
    text-align: right;
}

.article-nav-item.nav-next .article-nav-tags {
    justify-content: flex-end;
}

/* ─── Related Articles ────────────────────────────────────────── */
.article-related {
    margin-bottom: 60px;
}

.article-related-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.article-related-title i {
    color: var(--primary-solid);
}

.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
}

.related-article-item {
    display: block;
    padding: 16px 18px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: border-color 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
}

.related-article-item:hover {
    border-color: rgba(99, 102, 241, 0.35);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.08);
    text-decoration: none;
}

.related-article-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.45;
    margin-bottom: 10px;
    overflow-wrap: break-word;
}

.related-article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.related-article-tag {
    font-size: 0.68rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary-solid);
    font-weight: 600;
}

/* ─── Sidebar TOC ─────────────────────────────────────────────── */
.article-sidebar {
    position: sticky;
    top: 92px;
    align-self: start;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.toc-card {
    background: var(--bg-gray);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px 22px;
}

.toc-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-title i {
    color: var(--primary-solid);
}

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

.toc-list li {
    margin: 0;
}

.toc-list a {
    display: block;
    padding: 5px 0 5px 12px;
    font-size: 0.84rem;
    color: var(--text-light);
    border-left: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    line-height: 1.45;
    overflow-wrap: break-word;
}

.toc-list a:hover {
    color: var(--primary-solid);
    border-left-color: rgba(99, 102, 241, 0.4);
    text-decoration: none;
}

.toc-list a.active {
    color: var(--primary-solid);
    border-left-color: var(--primary-solid);
    font-weight: 600;
}

.toc-list li.toc-h3 > a {
    padding-left: 24px;
    font-size: 0.78rem;
}

/* ─── Floating Widget ─────────────────────────────────────────── */
.float-widget {
    position: fixed;
    bottom: 36px;
    right: 36px;
    width: 296px;
    background: var(--bg-white);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.13);
    padding: 22px 22px 20px;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    overflow: hidden;
}

.float-widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
}

.float-widget.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.float-widget-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    font-size: 0.95rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 5px;
    transition: color 0.2s;
}

.float-widget-close:hover {
    color: var(--text-dark);
}

.float-widget-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: contain;
    margin-bottom: 12px;
}

.float-widget-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 7px;
}

.float-widget-desc {
    font-size: 0.84rem;
    color: var(--text-light);
    line-height: 1.55;
    margin-bottom: 14px;
}

.float-widget-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--primary-gradient);
    color: #fff !important;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none !important;
    transition: opacity 0.2s, transform 0.2s;
}

.float-widget-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* ─── Responsive Breakpoints ──────────────────────────────────── */
@media (max-width: 1024px) {
    .article-page-wrap {
        grid-template-columns: 1fr;
        padding: 92px 24px 60px;
        gap: 0;
    }

    .article-sidebar {
        display: none;
    }

    .float-widget {
        width: auto;
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
    }
}

/* End-of-article download CTA (blog generator inline-cta class) */
.article-body a.inline-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: linear-gradient(135deg, #06b6d4, #0284c7);
    color: #fff;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.98rem;
    text-decoration: none;
    transition: filter 0.2s;
}

.article-body a.inline-cta:hover {
    filter: brightness(1.06);
}

@media (max-width: 768px) {
    .article-page-wrap {
        padding: 84px 16px 48px;
    }

    .article-header h1 {
        font-size: 1.5rem;
    }

    .article-body {
        font-size: 0.98rem;
    }

    .article-body h2 {
        font-size: 1.3rem;
        margin: 40px 0 16px;
    }

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

    .article-body pre {
        padding: 14px 16px;
        font-size: 0.82rem;
    }

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

    .related-articles-grid {
        grid-template-columns: 1fr 1fr;
    }

    .product-recommend {
        padding: 24px 20px;
    }

    .product-recommend-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .related-articles-grid {
        grid-template-columns: 1fr;
    }

    .float-widget {
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
        padding: 18px 20px 24px;
    }

    .float-widget-icon {
        width: 32px;
        height: 32px;
        margin-bottom: 8px;
    }

    .float-widget-title {
        font-size: 0.92rem;
    }

    .float-widget-desc {
        font-size: 0.82rem;
        margin-bottom: 10px;
    }

    .float-widget-btn {
        padding: 10px 18px;
        font-size: 0.86rem;
    }
}