/**
 * Robot Lease Navi - Articles CSS
 * 記事一覧・記事詳細ページ専用スタイル
 */

/* ============================================================
   0. Articles Page (Hero, Main)
   ============================================================ */

.articles-hero {
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfeff 50%, #f0fdf4 100%);
    padding: 100px 0 48px;
    text-align: center;
}

[data-theme="dark"] .articles-hero {
    background: linear-gradient(135deg, rgba(5,150,105,.08), rgba(8,145,178,.06));
}

.articles-hero-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.articles-hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

.articles-main {
    padding: 48px 0 80px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .articles-hero { padding: 80px 0 36px; }
    .articles-hero-title { font-size: 24px; }
    .articles-main { padding: 32px 0 56px; }
    .articles-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   1. Article Card
   ============================================================ */

.article-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    text-decoration: none;
    color: var(--text-primary);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.article-card-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
}

.article-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article-card:hover .article-card-thumb img {
    transform: scale(1.04);
}

.article-card-thumb-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-primary-light) 0%, var(--accent-secondary-light) 100%);
    color: var(--accent-primary);
}

.article-card-thumb-icon .lucide-icon {
    width: 36px;
    height: 36px;
    opacity: 0.7;
}

.article-card-thumb-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.article-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 10px;
}

.article-card-inner {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    flex: 1;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.article-card-cat {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--accent-primary-light);
    color: var(--accent-primary-dark);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.article-card-cat .lucide-icon {
    width: 10px;
    height: 10px;
}

.article-card-date {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-card-date .lucide-icon {
    width: 12px;
    height: 12px;
}

.article-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.article-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px 16px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.article-card-readmore {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-primary);
    transition: gap var(--transition-fast);
}

.article-card-readmore .lucide-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.article-card:hover .article-card-readmore .lucide-icon {
    transform: translateX(3px);
}

.article-card-read-time {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-card-read-time .lucide-icon {
    width: 12px;
    height: 12px;
}

/* ============================================================
   2. Articles Grid
   ============================================================ */

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Articles list page */
.articles-page {
    padding: 56px 0;
}

.articles-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.articles-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.articles-filter-btn:hover,
.articles-filter-btn.is-active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #ffffff;
}

.articles-filter-btn .lucide-icon {
    width: 13px;
    height: 13px;
}

/* ============================================================
   3. Article Hero Section
   ============================================================ */

.article-hero-section {
    background: var(--bg-secondary);
    padding: 40px 0;
    border-bottom: 1px solid var(--border);
}

.article-hero-breadcrumb,
.breadcrumb {
    margin-bottom: 20px;
}

.article-hero-breadcrumb a,
.breadcrumb a {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-hero-breadcrumb a:hover,
.breadcrumb a:hover {
    color: var(--accent-primary);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 13px;
    color: var(--text-muted);
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 4px;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
    font-size: 12px;
    margin-left: 2px;
}

.breadcrumb-list li[aria-current="page"] {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 300px;
}

.article-hero-breadcrumb .sep {
    color: var(--text-muted);
    font-size: 13px;
}

.article-hero-breadcrumb .current {
    font-size: 13px;
    color: var(--text-secondary);
}

.article-hero-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.article-hero-title {
    font-size: clamp(22px, 3.5vw, 36px);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1.3;
    margin-bottom: 16px;
}

.article-hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 720px;
}

.article-hero-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.article-hero-info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

.article-hero-info-item .lucide-icon {
    width: 14px;
    height: 14px;
}

/* ============================================================
   4. Article Body Layout (2 Column)
   ============================================================ */

.article-body-wrap {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    padding: 48px 0;
    align-items: start;
}

/* ============================================================
   5. Article Body Content
   ============================================================ */

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

.article-lead {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 32px;
    padding: 20px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent-primary);
}

.article-body h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-primary);
    line-height: 1.4;
}

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

.article-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 12px;
    padding-left: 12px;
    border-left: 3px solid var(--accent-primary);
    line-height: 1.5;
}

.article-body h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 10px;
}

.article-body p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 20px;
}

.article-body a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-decoration-color: rgba(5, 150, 105, 0.4);
    text-underline-offset: 3px;
    transition: all var(--transition-fast);
}

.article-body a:hover {
    color: var(--accent-primary-dark);
    text-decoration-color: var(--accent-primary);
}

.article-body ul,
.article-body ol {
    margin-bottom: 20px;
    padding-left: 0;
    list-style: none;
}

.article-body ul li,
.article-body ol li {
    position: relative;
    padding-left: 22px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 8px;
}

.article-body ul li::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 11px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
    flex-shrink: 0;
}

.article-body ol {
    counter-reset: ol-counter;
}

.article-body ol li {
    counter-increment: ol-counter;
}

.article-body ol li::before {
    content: counter(ol-counter) '.';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 14px;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
    font-size: 14px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.article-body table th {
    background: var(--accent-primary-light);
    color: var(--accent-primary-dark);
    font-weight: 700;
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.article-body table td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
    vertical-align: middle;
}

.article-body table tr:last-child td {
    border-bottom: none;
}

.article-body table tbody tr:hover {
    background: var(--bg-secondary);
}

.article-body blockquote {
    margin: 24px 0;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-style: italic;
}

.article-body .note-box {
    padding: 16px 20px;
    background: var(--accent-secondary-light);
    border-radius: var(--radius-md);
    color: var(--accent-secondary-dark);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
}

/* ============================================================
   6. Article Sidebar
   ============================================================ */

.article-sidebar {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.sidebar-card-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card-header .lucide-icon {
    width: 14px;
    height: 14px;
    color: var(--accent-primary);
}

.sidebar-card-body {
    padding: 16px 18px;
}

/* ============================================================
   6b. TOC Widget
   ============================================================ */

.toc-widget {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.toc-widget h3 {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.toc-widget nav {
    padding: 12px 18px;
}

.toc-widget nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toc-widget nav a {
    display: block;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    line-height: 1.5;
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
}

.toc-widget nav a:hover {
    color: var(--accent-primary);
    background: var(--accent-primary-light);
    border-left-color: var(--accent-primary);
}

/* ============================================================
   6c. Sidebar CTA (cta-inner)
   ============================================================ */

.article-sidebar .cta-section {
    padding: 0;
    margin-top: 0;
    text-align: left;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cta-inner {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cta-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-primary-light);
    color: var(--accent-primary);
}

.cta-icon .lucide-icon {
    width: 22px;
    height: 22px;
}

.cta-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cta-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.5;
    margin: 0;
}

.cta-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.cta-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 4px 0 0;
}

.cta-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-primary-dark);
    background: var(--accent-primary-light);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

.cta-badge .lucide-icon {
    width: 12px;
    height: 12px;
}

.cta-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}

.cta-actions .btn {
    width: 100%;
    justify-content: center;
    font-size: 13px;
}

/* ============================================================
   7. Table of Contents (TOC) - legacy
   ============================================================ */

.article-toc {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.article-toc-item {
    display: flex;
}

.article-toc-link {
    display: block;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    line-height: 1.5;
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
    width: 100%;
}

.article-toc-link:hover {
    color: var(--accent-primary);
    background: var(--accent-primary-light);
    border-left-color: var(--accent-primary);
}

.article-toc-link.is-active {
    color: var(--accent-primary);
    background: var(--accent-primary-light);
    border-left-color: var(--accent-primary);
    font-weight: 600;
}

.article-toc-item.toc-h3 .article-toc-link {
    padding-left: 20px;
    font-size: 12px;
}

/* ============================================================
   8. Article CTA Section (記事下)
   ============================================================ */

.cta-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    margin-top: 48px;
    text-align: center;
}

.cta-section-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-primary-light);
    color: var(--accent-primary);
    margin: 0 auto 16px;
}

.cta-section-icon .lucide-icon {
    width: 24px;
    height: 24px;
}

.cta-section-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 10px;
}

.cta-section-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* Related articles */
.related-articles {
    margin-top: 48px;
}

.related-articles-title {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

/* ============================================================
   9. Responsive
   ============================================================ */

@media (max-width: 1024px) {
    .article-body-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .article-sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }

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

    .article-body-wrap {
        padding: 32px 0;
    }

    .article-body h2 {
        font-size: 20px;
        margin-top: 36px;
    }

    .article-body h3 {
        font-size: 17px;
    }

    .cta-section {
        padding: 28px 20px;
    }

    .cta-section-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-section-actions .btn {
        width: 100%;
        justify-content: center;
    }
}