/* ===================================================
   blog.css - ブログページ専用スタイル
   =================================================== */

/* ---------------------------------------------------
   カテゴリーフィルター（news.css と同一クラスを再定義）
   --------------------------------------------------- */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.category-filter__btn {
    display: inline-block;
    padding: 6px 18px;
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-text);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.category-filter__btn:hover,
.category-filter__btn.is-active {
    color: var(--color-white);
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

/* ---------------------------------------------------
   ブログカテゴリーバッジ
   --------------------------------------------------- */
.blog-category-badge {
    display: inline-block;
    padding: 2px 9px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    background-color: rgba(53, 178, 28, 0.1);
    border: 1px solid rgba(53, 178, 28, 0.3);
    border-radius: 3px;
    white-space: nowrap;
}

/* ---------------------------------------------------
   ブログアーカイブ（3カラムグリッド）
   --------------------------------------------------- */
.blog-archive {
    display: grid;
    grid-template-columns: repeat( 3, 1fr );
    gap: 32px;
    margin-bottom: 40px;
}

/* ---------------------------------------------------
   ブログカード
   --------------------------------------------------- */
.blog-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.blog-card__link {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: var(--color-text);
}

/* 画像エリア */
.blog-card__image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    flex-shrink: 0;
}

.blog-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.blog-card:hover .blog-card__image img {
    transform: scale(1.05);
}

.blog-card__no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e0e0e0;
}

.blog-card__no-image span {
    font-size: 1.3rem;
    color: var(--color-text-muted);
}

/* カード本文 */
.blog-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 18px 20px 20px;
}

.blog-card__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    margin-bottom: 10px;
}

.blog-card__date {
    font-size: 1.2rem;
    color: var(--color-text-muted);
}

.blog-card__title {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.55;
    margin: 0 0 10px;
    color: var(--color-text);
    transition: color 0.15s;
    /* 2行クランプ */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card:hover .blog-card__title {
    color: var(--color-primary);
}

.blog-card__excerpt {
    font-size: 1.3rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin: 0;
    /* 3行クランプ */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

/* ---------------------------------------------------
   ブログ詳細
   --------------------------------------------------- */
.blog-single {
    max-width: 800px;
    margin: 0 auto;
}

.blog-single__thumbnail {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.blog-single__thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.blog-single__header {
    margin-bottom: 28px;
}

.blog-single__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
}

.blog-single__content {
    margin-bottom: 48px;
}

/* ---------------------------------------------------
   前後記事ナビゲーション
   --------------------------------------------------- */
.post-navigation {
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.post-navigation__inner {
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

.post-navigation__link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: 45%;
    text-decoration: none;
    color: var(--color-text);
    transition: color 0.15s;
}

.post-navigation__link:hover {
    color: var(--color-primary);
}

.post-navigation__link--next {
    text-align: right;
    margin-left: auto;
}

.post-navigation__label {
    font-size: 1.2rem;
    color: var(--color-text-muted);
}

.post-navigation__title {
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.5;
    /* 2行クランプ */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-navigation__spacer {
    flex: 1;
}

/* ---------------------------------------------------
   一覧へ戻る / ページネーション（news.css と同一定義）
   --------------------------------------------------- */
.single-back {
    text-align: center;
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius);
    transition: background-color 0.2s, color 0.2s;
    cursor: pointer;
}

.btn--outline {
    color: var(--color-primary);
    background-color: var(--color-white);
    border: 2px solid var(--color-primary);
}

.btn--outline:hover {
    color: var(--color-white);
    background-color: var(--color-primary);
}

.pagination {
    margin-top: 40px;
    text-align: center;
}

.pagination__list {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.pagination__item a,
.pagination__item span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 10px;
    font-size: 1.4rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--color-text);
    transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.pagination__item a:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination__item span.current {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    font-weight: 700;
}

.no-posts {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    padding: 48px 0;
}

/* ---------------------------------------------------
   レスポンシブ
   --------------------------------------------------- */
@media (max-width: 1024px) {
    .blog-archive {
        grid-template-columns: repeat( 2, 1fr );
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .blog-archive {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .blog-single {
        max-width: 100%;
    }

    .post-navigation__link {
        max-width: 48%;
    }

    .post-navigation__title {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .blog-card__title {
        font-size: 1.5rem;
    }
}