/* ========================================
   コラム（ブログ）ページ専用スタイル
   既存テーマのデザインパターンに統一
======================================== */

/* ----------------------------------------
   コラム一覧（home.php / archive.php）
---------------------------------------- */
.column-archive {
    padding: 80px 0;
    background-color: var(--bg-light);
}

/* 記事カードグリッド */
.column-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* 記事カード */
.column-card {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.column-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.column-card-link {
    display: block;
    color: inherit;
}

.column-card-link:hover {
    color: inherit;
}

/* サムネイル */
.column-card-thumbnail {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--bg-light);
}

.column-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.column-card:hover .column-card-thumbnail img {
    transform: scale(1.05);
}

.column-card-no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: rgba(255, 255, 255, 0.3);
    font-size: 3rem;
}

/* カード本文 */
.column-card-body {
    padding: 24px;
}

.column-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.column-card-meta time {
    display: flex;
    align-items: center;
    gap: 5px;
}

.column-card-category {
    background-color: var(--primary-color);
    color: white;
    padding: 2px 10px;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 500;
}

.column-card-title {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.column-card-excerpt {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.column-card-readmore {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-weight: 500;
    transition: var(--transition);
}

.column-card:hover .column-card-readmore {
    color: var(--accent-color);
}

.column-card:hover .column-card-readmore i {
    transform: translateX(4px);
}

.column-card-readmore i {
    transition: transform 0.3s ease;
}

/* ページネーション */
.column-pagination {
    margin-top: 60px;
    text-align: center;
}

.column-pagination .nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.column-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-color);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.column-pagination .page-numbers:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.column-pagination .page-numbers.current {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.column-pagination .prev,
.column-pagination .next {
    font-size: 0.85rem;
}

/* 記事なしの表示 */
.column-empty {
    text-align: center;
    padding: 80px 0;
    color: var(--text-light);
}

.column-empty-icon {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 20px;
}

.column-empty p {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.column-empty-sub {
    font-size: 0.9rem;
}


/* ----------------------------------------
   コラム個別記事（single.php）
---------------------------------------- */
.column-single {
    padding: 0 0 80px;
}

.column-single .container {
    max-width: 860px;
}

.column-single-header {
    padding: 60px 0 30px;
}

.column-single-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.column-single-meta time,
.column-single-updated {
    display: flex;
    align-items: center;
    gap: 6px;
}

.column-single-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--primary-color);
    font-family: var(--font-serif);
}

.column-single-categories {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.column-category-tag {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 4px 14px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.column-category-tag:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* アイキャッチ画像 */
.column-single-thumbnail {
    margin-bottom: 40px;
    border-radius: 12px;
    overflow: hidden;
}

.column-single-thumbnail img {
    width: 100%;
    height: auto;
}

/* 記事本文 */
.column-single-content {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-color);
}

.column-single-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 48px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-color);
    font-family: var(--font-serif);
}

.column-single-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 36px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--accent-color);
}

.column-single-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 28px 0 12px;
}

.column-single-content p {
    margin-bottom: 1.5em;
}

.column-single-content ul,
.column-single-content ol {
    margin: 1em 0 1.5em 1.5em;
    list-style: disc;
}

.column-single-content ol {
    list-style: decimal;
}

.column-single-content li {
    margin-bottom: 0.5em;
}

.column-single-content blockquote {
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent-color);
    padding: 20px 24px;
    margin: 1.5em 0;
    font-style: italic;
    color: var(--text-light);
}

.column-single-content img {
    border-radius: 8px;
    margin: 1.5em 0;
}

.column-single-content a {
    color: var(--secondary-color);
    text-decoration: underline;
}

.column-single-content a:hover {
    color: var(--accent-color);
}

.column-single-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
}

.column-single-content th,
.column-single-content td {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.column-single-content th {
    background-color: var(--bg-light);
    font-weight: 600;
}

.column-single-content pre {
    background-color: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5em 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.column-single-content code {
    background-color: var(--bg-light);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
}

.column-single-content pre code {
    background: none;
    padding: 0;
}

/* タグ */
.column-single-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-light);
}

.column-tag {
    display: inline-block;
    color: var(--secondary-color);
    background-color: var(--bg-light);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: var(--transition);
}

.column-tag:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* 前後記事ナビゲーション */
.column-post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.column-post-nav-item a {
    display: block;
    padding: 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
}

.column-post-nav-item a:hover {
    background-color: var(--primary-color);
    color: white;
}

.column-post-nav-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 6px;
}

.column-post-nav-item a:hover .column-post-nav-label {
    color: rgba(255, 255, 255, 0.7);
}

.column-post-nav-title {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.column-post-nav-next {
    text-align: right;
}

/* コラム一覧へ戻る */
.column-back-to-list {
    text-align: center;
    margin-top: 40px;
}

.column-back-to-list .btn i {
    margin-right: 6px;
}


/* ----------------------------------------
   レスポンシブ対応
---------------------------------------- */

/* タブレット */
@media screen and (max-width: 968px) {
    .column-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .column-single-title {
        font-size: 1.7rem;
    }

    .column-single-content h2 {
        font-size: 1.4rem;
    }
}

/* スマートフォン */
@media screen and (max-width: 600px) {
    .column-archive {
        padding: 50px 0;
    }

    .column-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .column-card-body {
        padding: 18px;
    }

    .column-card-title {
        font-size: 1.05rem;
    }

    .column-single-header {
        padding: 40px 0 20px;
    }

    .column-single-title {
        font-size: 1.4rem;
    }

    .column-single-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .column-single-content {
        font-size: 1rem;
    }

    .column-single-content h2 {
        font-size: 1.25rem;
    }

    .column-single-content h3 {
        font-size: 1.1rem;
    }

    .column-post-nav {
        grid-template-columns: 1fr;
    }
}