/* ========================================
   ブログページ スタイル
   ランディングページのデザインシステムに準拠
   ======================================== */

/* ── CSS変数 ─────────────────────────── */
:root {
    --blog-ink:       #0a0f1a;
    --blog-text:      #1a2332;
    --blog-text-mid:  #4a5568;
    --blog-text-mute: #8892a4;
    --blog-surface:   #ffffff;
    --blog-bg:        #f8f9fb;
    --blog-border:    #e2e5eb;
    --blog-accent:    #b8860b;
    --blog-accent-h:  #d4a017;
    --blog-primary:   #1a2540;
    --blog-radius:    10px;
    --blog-radius-lg: 16px;
    --blog-font:      'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --blog-max:       1120px;
    --blog-narrow:    760px;
    --blog-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── リセット & ベース ───────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; max-width: 100%; }

.blog-body {
    font-family: var(--blog-font);
    background: var(--blog-bg);
    color: var(--blog-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.blog-container {
    max-width: var(--blog-max);
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

.blog-container-narrow {
    max-width: var(--blog-narrow);
}

/* ========================================
   ヘッダー
   ======================================== */
.blog-header {
    background: var(--blog-surface);
    border-bottom: 1px solid var(--blog-border);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.blog-header .blog-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.blog-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--blog-ink);
    font-weight: 700;
    font-size: 1rem;
}

.blog-logo-icon { color: var(--blog-accent); }

.blog-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.blog-nav a {
    text-decoration: none;
    color: var(--blog-text-mid);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--blog-transition);
}

.blog-nav a:hover { color: var(--blog-ink); }

.blog-nav-cta {
    background: var(--blog-primary) !important;
    color: #fff !important;
    padding: 0.45rem 1.1rem;
    border-radius: 8px;
    font-size: 0.85rem !important;
}

.blog-nav-cta:hover {
    background: var(--blog-accent) !important;
}

/* ========================================
   メインコンテンツ
   ======================================== */
.blog-main {
    min-height: 60vh;
    padding: 2rem 0 3rem;
}

/* ── パンくずリスト ──────────────────── */
.blog-breadcrumb {
    font-size: 0.85rem;
    color: var(--blog-text-mute);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.blog-breadcrumb a {
    color: var(--blog-text-mid);
    text-decoration: none;
}

.blog-breadcrumb a:hover {
    color: var(--blog-accent);
}

/* ── 記事一覧 ────────────────────────── */
.blog-list-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--blog-ink);
    margin-bottom: 1.2rem;
}

.blog-categories {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.blog-category-tag {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--blog-border);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--blog-text-mid);
    text-decoration: none;
    transition: all var(--blog-transition);
}

.blog-category-tag:hover,
.blog-category-tag.active {
    background: var(--blog-primary);
    color: #fff;
    border-color: var(--blog-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.blog-card {
    background: var(--blog-surface);
    border: 1px solid var(--blog-border);
    border-radius: var(--blog-radius-lg);
    overflow: hidden;
    transition: box-shadow var(--blog-transition), transform var(--blog-transition);
}

.blog-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}

.blog-card-body {
    padding: 1.3rem 1.5rem;
}

.blog-card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--blog-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.blog-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.blog-card-title a {
    text-decoration: none;
    color: var(--blog-ink);
}

.blog-card-title a:hover {
    color: var(--blog-accent);
}

.blog-card-desc {
    font-size: 0.9rem;
    color: var(--blog-text-mid);
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--blog-text-mute);
}

/* ── ページネーション ────────────────── */
.blog-pagination {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    margin-top: 2.5rem;
}

.blog-page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.6rem;
    border: 1px solid var(--blog-border);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--blog-text-mid);
    text-decoration: none;
    transition: all var(--blog-transition);
}

.blog-page-link:hover,
.blog-page-link.active {
    background: var(--blog-primary);
    color: #fff;
    border-color: var(--blog-primary);
}

.blog-page-dots {
    display: inline-flex;
    align-items: center;
    padding: 0 0.3rem;
    color: var(--blog-text-mute);
}

.blog-empty {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--blog-text-mute);
    font-size: 1rem;
}

/* ========================================
   記事詳細
   ======================================== */
.blog-article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--blog-border);
}

.blog-article-category {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--blog-accent);
    margin-bottom: 0.6rem;
}

.blog-article-title {
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.4;
    color: var(--blog-ink);
    margin-bottom: 0.8rem;
}

.blog-article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--blog-text-mute);
}

/* ── 記事本文 ────────────────────────── */
.blog-article-body {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--blog-text);
}

.blog-article-body h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--blog-ink);
    margin: 2rem 0 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--blog-accent);
}

.blog-article-body h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--blog-ink);
    margin: 1.5rem 0 0.6rem;
}

.blog-article-body p {
    margin-bottom: 1rem;
}

.blog-article-body ul,
.blog-article-body ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.blog-article-body li {
    margin-bottom: 0.4rem;
}

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

.blog-article-body a {
    color: var(--blog-accent);
    text-decoration: underline;
}

/* ── 記事ナビ ────────────────────────── */
.blog-post-nav {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--blog-border);
}

.blog-back-link {
    font-size: 0.9rem;
    color: var(--blog-text-mid);
    text-decoration: none;
}

.blog-back-link:hover {
    color: var(--blog-accent);
}

/* ========================================
   CTA
   ======================================== */
.blog-cta {
    background: var(--blog-primary);
    padding: 3rem 0;
    text-align: center;
}

.blog-cta-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.8rem;
}

.blog-cta-desc {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 1.5rem;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.blog-cta-btn {
    display: inline-block;
    background: var(--blog-accent);
    color: #fff;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: background var(--blog-transition);
}

.blog-cta-btn:hover {
    background: var(--blog-accent-h);
}

.blog-cta-sub {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    margin-top: 0.6rem;
}

/* ========================================
   フッター
   ======================================== */
.blog-footer {
    background: var(--blog-surface);
    border-top: 1px solid var(--blog-border);
    padding: 1.5rem 0;
}

.blog-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.blog-footer-source {
    font-size: 0.8rem;
    color: var(--blog-text-mute);
}

.blog-footer-links {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

.blog-footer-links a {
    font-size: 0.8rem;
    color: var(--blog-text-mute);
    text-decoration: none;
}

.blog-footer-links a:hover {
    color: var(--blog-accent);
}

/* ========================================
   レスポンシブ
   ======================================== */
@media (max-width: 768px) {
    .blog-header .blog-container {
        height: 56px;
    }

    .blog-header { padding: 0 12px; }
    .blog-container { padding: 0 16px; }

    .blog-nav {
        gap: 10px;
    }

    .blog-nav a { font-size: 0.75rem; }

    .blog-nav-cta {
        padding: 0.35rem 0.8rem !important;
        font-size: 0.75rem !important;
    }

    .blog-logo { font-size: 0.85rem; gap: 6px; }
    .blog-logo-icon { width: 20px; height: 20px; }

    .blog-list-title { font-size: 1.3rem; }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-article-title {
        font-size: 1.4rem;
    }

    .blog-article-body h2 {
        font-size: 1.2rem;
    }

    .blog-cta { padding: 2rem 0; }
    .blog-cta-title { font-size: 1.2rem; }

    .blog-footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .blog-footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .blog-header .blog-container {
        height: 50px;
    }

    .blog-header { padding: 0 8px; }
    .blog-container { padding: 0 12px; }

    .blog-logo { font-size: 0.78rem; gap: 5px; }
    .blog-logo-icon { width: 18px; height: 18px; }

    .blog-nav { gap: 8px; }
    .blog-nav a { font-size: 0.7rem; }
    .blog-nav-cta { display: none; }

    .blog-categories { gap: 0.3rem; }
    .blog-category-tag { font-size: 0.78rem; padding: 0.3rem 0.7rem; }
}

/* ── ブログ記事内 ダッシュボードCTAバナー ── */
.blog-dashboard-cta {
    margin: 2.5rem 0;
    background: linear-gradient(135deg, #f0f4ff 0%, #f5f0ff 100%);
    border: 2px solid #c7d2fe;
    border-radius: 12px;
    padding: 28px 24px 20px;
}

.blog-cta-inner {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.blog-cta-icon {
    font-size: 32px;
    flex-shrink: 0;
    line-height: 1;
}

.blog-cta-text-block {
    flex: 1;
}

.blog-cta-heading {
    font-size: 17px;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 8px;
    line-height: 1.4;
}

.blog-cta-description {
    font-size: 14px;
    color: #475569;
    line-height: 1.7;
    margin: 0 0 14px;
}

.blog-cta-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.blog-cta-button {
    display: inline-block;
    padding: 9px 22px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.blog-cta-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
}

.blog-cta-primary:hover {
    opacity: 0.9;
    color: #ffffff;
}

.blog-cta-secondary {
    background: #ffffff;
    color: #667eea;
    border: 1px solid #c7d2fe;
}

.blog-cta-secondary:hover {
    background: #f0f4ff;
    color: #667eea;
}

.blog-cta-features {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid #ddd6fe;
}

.blog-cta-feature {
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .blog-cta-inner {
        flex-direction: column;
    }
    .blog-cta-features {
        gap: 8px;
    }
}

/* ── 関連記事セクション ── */
.blog-related {
    margin: 2.5rem 0 1.5rem;
}

.blog-related-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--blog-text, #1a2332);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e2e8f0;
}

.blog-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}

.blog-related-card {
    display: block;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 16px;
    text-decoration: none;
    transition: all 0.2s;
}

.blog-related-card:hover {
    border-color: #667eea;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.blog-related-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    color: #667eea;
    background: #f0f4ff;
    padding: 2px 8px;
    border-radius: 3px;
    margin-bottom: 6px;
}

.blog-related-heading {
    font-size: 0.9rem;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.5;
    margin: 0 0 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-related-date {
    font-size: 0.75rem;
    color: #94a3b8;
}

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