/* =========================================================
   記事一覧・記事詳細・トップ新着記事
   ========================================================= */

.article-list-hero {
    padding: 52px 0;
    background:
        radial-gradient(circle at 90% 10%, rgba(236, 72, 153, 0.12), transparent 30%),
        radial-gradient(circle at 10% 90%, rgba(99, 91, 255, 0.12), transparent 34%),
        #fafaff;
    border-bottom: 1px solid var(--color-border);
}

.article-list-hero h2 {
    margin: 8px 0 10px;
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.2;
}

.article-list-hero p {
    max-width: 720px;
    margin: 0;
    color: var(--color-muted);
}

.article-list-layout,
.article-detail-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: 26px;
}

.article-card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.article-card {
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.article-card-image {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #eeecff, #fff0f7);
}

.article-card-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.article-no-image {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: rgba(99, 91, 255, 0.55);
    font-weight: 900;
    letter-spacing: 0.12em;
}

.article-card-body {
    padding: 19px;
}

.article-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 9px;
    color: var(--color-muted);
    font-size: 0.75rem;
}

.article-card-meta span {
    padding: 4px 8px;
    color: var(--color-primary-dark);
    background: var(--color-primary-soft);
    border-radius: 999px;
    font-weight: 800;
}

.article-card h2 {
    margin: 11px 0 8px;
    font-size: 1.13rem;
    line-height: 1.55;
}

.article-card h2 a {
    color: var(--color-text);
}

.article-card-body > p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.88rem;
}

.article-read-more {
    margin-top: 16px;
    display: inline-flex;
    font-size: 0.82rem;
    font-weight: 800;
}

.article-sidebar {
    position: sticky;
    top: 20px;
    display: grid;
    gap: 16px;
}

.article-category-nav {
    display: grid;
    gap: 6px;
}

.article-category-nav a {
    padding: 9px 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    color: var(--color-text);
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.82rem;
    font-weight: 800;
}

.article-category-nav a.is-active,
.article-category-nav a:hover {
    color: var(--color-primary-dark);
    background: var(--color-primary-soft);
    border-color: #d4ceff;
}

.article-detail-section {
    padding-top: 34px;
}

.article-detail-card {
    min-width: 0;
    padding: 30px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.article-detail-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    color: var(--color-muted);
    font-size: 0.8rem;
}

.article-detail-meta a {
    padding: 5px 9px;
    color: var(--color-primary-dark);
    background: var(--color-primary-soft);
    border-radius: 999px;
    font-weight: 800;
}

.article-detail-header h2 {
    margin: 14px 0 12px;
    font-size: clamp(1.8rem, 4.5vw, 3.1rem);
    line-height: 1.3;
    letter-spacing: -0.025em;
}

.article-lead {
    margin: 0;
    color: var(--color-muted);
    font-size: 1.02rem;
}

.article-main-image {
    margin: 26px 0 0;
    overflow: hidden;
    border-radius: 18px;
}

.article-main-image img {
    width: 100%;
    display: block;
}

.article-content {
    margin-top: 30px;
    color: #2d3748;
    font-size: 1rem;
    line-height: 1.95;
    overflow-wrap: anywhere;
}

.article-content h2 {
    margin: 42px 0 16px;
    padding: 13px 16px;
    font-size: 1.5rem;
    line-height: 1.45;
    background: #f4f2ff;
    border-left: 5px solid var(--color-primary);
    border-radius: 8px;
}

.article-content h3 {
    margin: 32px 0 12px;
    padding-bottom: 8px;
    font-size: 1.25rem;
    border-bottom: 2px solid var(--color-primary-soft);
}

.article-content p,
.article-content ul,
.article-content ol {
    margin: 0 0 1.4em;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 13px;
}

.article-content figure {
    margin: 26px 0;
}

.article-content figcaption {
    margin-top: 7px;
    color: var(--color-muted);
    text-align: center;
    font-size: 0.78rem;
}

.article-content blockquote {
    margin: 24px 0;
    padding: 18px;
    color: #475467;
    background: #f8fafc;
    border-left: 4px solid var(--color-primary);
    border-radius: 8px;
}

.article-content table {
    width: 100%;
    margin: 24px 0;
    border-collapse: collapse;
}

.article-content th,
.article-content td {
    padding: 10px;
    border: 1px solid var(--color-border);
    text-align: left;
}

.article-content th {
    background: #f8fafc;
}

.article-tag-list {
    margin-top: 26px;
    padding-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.78rem;
}

.article-tag-list span:not(:first-child) {
    padding: 4px 8px;
    color: var(--color-primary-dark);
    background: var(--color-primary-soft);
    border-radius: 999px;
    font-weight: 800;
}

.article-board-cta {
    margin-top: 30px;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    color: #fff;
    background:
        radial-gradient(circle at 90% 0, rgba(255,255,255,0.13), transparent 30%),
        linear-gradient(135deg, #172033, #2d3753);
    border-radius: 20px;
}

.article-board-cta h2 {
    margin: 6px 0;
}

.article-board-cta p {
    margin: 0;
    color: #d7ddea;
}

.related-articles {
    margin-top: 36px;
}

.related-article-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.related-article-card {
    overflow: hidden;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 13px;
}

.related-article-card > img,
.related-article-card > .article-no-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.related-article-card > span:last-child {
    padding: 11px;
    display: grid;
    gap: 5px;
}

.related-article-card strong {
    font-size: 0.84rem;
    line-height: 1.55;
}

.related-article-card small {
    color: var(--color-muted);
}

.article-latest-posts {
    display: grid;
    gap: 8px;
}

.article-latest-posts a {
    padding: 10px;
    display: grid;
    gap: 3px;
    color: var(--color-text);
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: 10px;
}

.article-latest-posts strong {
    font-size: 0.8rem;
}

.article-latest-posts span {
    color: var(--color-muted);
    font-size: 0.72rem;
}

.home-latest-articles {
    padding-top: 10px;
}

.home-article-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.home-article-card {
    overflow: hidden;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.home-article-card-image {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #eeecff, #fff0f7);
}

.home-article-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.home-article-card-body {
    padding: 16px;
}

.home-article-card-meta {
    display: flex;
    gap: 8px;
    color: var(--color-muted);
    font-size: 0.72rem;
}

.home-article-card-body h3 {
    margin: 9px 0 7px;
    font-size: 1rem;
    line-height: 1.55;
}

.home-article-card-body h3 a {
    color: var(--color-text);
}

.home-article-card-body p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.82rem;
}

@media (max-width: 980px) {
    .article-list-layout,
    .article-detail-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .article-card-grid,
    .home-article-grid {
        grid-template-columns: 1fr;
    }

    .article-detail-card {
        padding: 19px;
        border-radius: 18px;
    }

    .article-detail-header h2 {
        font-size: 1.85rem;
    }

    .article-content {
        font-size: 0.96rem;
    }

    .article-content h2 {
        font-size: 1.3rem;
    }

    .article-board-cta {
        align-items: stretch;
        flex-direction: column;
    }

    .article-board-cta .button {
        width: 100%;
    }

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

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