/* ============================================
   医療AIナビ - Blog Styles
   top.css を読み込んだ上で追加するスタイル
   ============================================ */

/* ===== BLOG INDEX - HERO ===== */
.blog-hero {
    padding: 120px 24px 48px;
    background: linear-gradient(170deg, var(--blue-50) 0%, #fff 60%);
    text-align: center;
}
.blog-hero-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--blue-500);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 12px;
    padding: 4px 16px;
    background: var(--blue-100);
    border-radius: 20px;
}
.blog-hero-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.3;
    margin-bottom: 8px;
}
.blog-hero-desc {
    font-size: 0.95rem;
    color: var(--gray-500);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== CATEGORY FILTER ===== */
.category-filter {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 24px 24px 0;
}
.filter-btn {
    display: inline-block;
    padding: 6px 18px;
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-body);
    color: var(--gray-600);
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.5;
}
.filter-btn:hover {
    border-color: var(--blue-300);
    color: var(--blue-600);
    background: var(--blue-50);
}
.filter-btn.active {
    background: var(--blue-600);
    color: #fff;
    border-color: var(--blue-600);
}

/* フィルター結果なし */
.filter-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 56px 24px;
    color: var(--gray-400);
}
.filter-empty p {
    font-size: 0.95rem;
}

/* 近日公開カード */
.article-card-upcoming {
    opacity: 0.6;
    cursor: default;
}
.article-card-upcoming:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--gray-200);
}

/* ===== ARTICLE GRID (INDEX) ===== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    padding: 48px 0 80px;
}

.article-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s;
}
.article-card:hover {
    border-color: var(--blue-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}
.article-card-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--gray-100);
    overflow: hidden;
}
.article-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
/* サムネイルが無い場合のプレースホルダー */
.thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blue-50) 0%, var(--blue-100) 100%);
    color: var(--blue-300);
}
.thumb-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.6;
}

.article-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
.article-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.article-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 12px;
    letter-spacing: 0.02em;
}
.cat-news { background: var(--blue-100); color: var(--blue-700); }
.cat-guide { background: #fef3c7; color: #92400e; }
.cat-cert { background: #dbeafe; color: #1e40af; }
.cat-career { background: #ede9fe; color: #5b21b6; }
.cat-review { background: #dcfce7; color: #15803d; }
.article-date {
    font-size: 0.75rem;
    color: var(--gray-400);
    font-family: var(--font-display);
}
.article-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.6;
    margin-bottom: 8px;
}
.article-card-excerpt {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-card-more {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--blue-600);
    transition: color 0.2s;
}
.article-card:hover .article-card-more { text-decoration: underline; }

/* ===== FEATURED (1記事目・大きく表示) ===== */
.article-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
}
.article-featured .article-card-thumb {
    aspect-ratio: auto;
    min-height: 280px;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}
.article-featured .article-card-body {
    padding: 32px;
    justify-content: center;
}
.article-featured .article-card-title {
    font-size: 1.3rem;
}
.article-featured .article-card-excerpt {
    -webkit-line-clamp: 4;
}

/* ===== 記事ページ ===== */
.article-hero {
    padding: 100px 24px 32px;
    background: linear-gradient(170deg, var(--blue-50) 0%, #fff 100%);
}
.article-hero-inner {
    max-width: 780px;
    margin: 0 auto;
}
.article-hero-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.article-hero-title {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.5;
    margin-bottom: 12px;
}
.article-hero-desc {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ===== 記事本文 ===== */
.article-content {
    max-width: 780px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}
.article-content h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 48px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--blue-100);
    line-height: 1.5;
}
.article-content h2:first-child {
    margin-top: 0;
}
.article-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 32px 0 12px;
    padding-left: 14px;
    border-left: 3px solid var(--blue-400);
    line-height: 1.5;
}
.article-content p {
    font-size: 0.95rem;
    color: var(--gray-700);
    line-height: 2;
    margin-bottom: 20px;
}
.article-content ul,
.article-content ol {
    margin: 16px 0 24px 24px;
    list-style: disc;
}
.article-content ol { list-style: decimal; }
.article-content li {
    font-size: 0.93rem;
    color: var(--gray-700);
    line-height: 1.9;
    margin-bottom: 6px;
}
.article-content a {
    color: var(--blue-600);
    text-decoration: underline;
    display: inline;
}
.article-content a:hover {
    color: var(--blue-700);
}
.article-content strong {
    font-weight: 600;
    color: var(--gray-900);
}
.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 24px 0;
}

/* ===== 記事内ボックス ===== */
.info-box {
    background: var(--blue-50);
    border: 1px solid var(--blue-100);
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 24px 0;
}
.info-box h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--blue-700);
    margin-bottom: 10px;
}
.info-box p,
.info-box li {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.warning-box {
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 24px 0;
}
.warning-box h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #92400e;
    margin-bottom: 10px;
}
.warning-box p {
    font-size: 0.9rem;
    color: #78350f;
}

/* ===== 目次 ===== */
.toc {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    margin: 0 0 40px;
}
.toc-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.toc ol {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc;
}
.toc li {
    counter-increment: toc;
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 6px;
}
.toc li::before {
    content: counter(toc) ".";
    font-weight: 600;
    color: var(--blue-500);
    margin-right: 6px;
    font-family: var(--font-display);
}
.toc a {
    color: var(--gray-600);
    text-decoration: none;
    display: inline;
}
.toc a:hover {
    color: var(--blue-600);
    text-decoration: underline;
}

/* ===== 著者情報 ===== */
.author-box {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin: 48px 0 32px;
}
.author-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--blue-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-600);
}
.author-icon svg { width: 28px; height: 28px; }
.author-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}
.author-info p {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ===== 関連記事 ===== */
.related-section {
    padding: 48px 0 80px;
    background: var(--gray-50);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

/* ===== CTA ===== */
.blog-cta {
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-700) 100%);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    margin: 48px 0;
    color: #fff;
}
.blog-cta h3,
.article-content .blog-cta h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 8px;
    padding: 0;
    border: none;
    color: #fff;
}
.blog-cta p,
.article-content .blog-cta p {
    font-size: 0.9rem;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.9);
}
.blog-cta .btn-outline {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border-color: rgba(255,255,255,0.6);
    font-weight: 600;
    text-decoration: none;
}
.blog-cta .btn-outline:hover {
    background: rgba(255,255,255,0.25);
    border-color: #fff;
    text-decoration: none;
}

/* ===== パンくず ===== */
.breadcrumb-nav {
    max-width: 780px;
    margin: 0 auto;
    padding: 12px 0 0;
}
.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    color: var(--gray-400);
}
.breadcrumb-list a {
    color: var(--gray-500);
    text-decoration: none;
    display: inline;
}
.breadcrumb-list a:hover {
    color: var(--blue-600);
    text-decoration: underline;
}
.breadcrumb-sep {
    color: var(--gray-300);
    font-size: 0.7rem;
}

/* ===== 記事内広告 ===== */
.article-ad {
    margin: 32px 0;
    text-align: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .blog-hero { padding: 100px 20px 36px; }
    .blog-hero-title { font-size: 1.6rem; }

    .article-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 32px 0 60px;
    }
    .article-featured {
        grid-template-columns: 1fr;
    }
    .article-featured .article-card-thumb {
        aspect-ratio: 16 / 9;
        min-height: auto;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
    .article-featured .article-card-body { padding: 24px; }
    .article-featured .article-card-title { font-size: 1.1rem; }

    .article-hero { padding: 80px 20px 24px; }
    .article-content { padding: 32px 20px 60px; }
    .article-content h2 { font-size: 1.15rem; margin-top: 36px; }
    .article-content h3 { font-size: 1rem; }

    .related-grid { grid-template-columns: 1fr; gap: 16px; }

    .author-box { flex-direction: column; align-items: center; text-align: center; }

    .toc { padding: 20px; }
}

@media (max-width: 480px) {
    .blog-hero { padding: 76px 16px 28px; }
    .blog-hero-title { font-size: 1.4rem; }
    .blog-hero-desc { font-size: 0.88rem; }

    .article-card-body { padding: 20px; }
    .article-card-title { font-size: 0.95rem; }

    .article-content { padding: 24px 16px 48px; }
    .article-content p { font-size: 0.9rem; }

    .blog-cta { padding: 28px 20px; }
    .blog-cta h3 { font-size: 1.05rem; }

    .info-box, .warning-box { padding: 20px 16px; }
}