/* ============================================================
   column.css — コラム一覧 / 個別記事ページ 共通スタイル
   ============================================================ */

/* --- Column list page --- */
.column-list__heading {
    text-align: center;
    margin-bottom: 48px;
}

/* Category section */
.column-category {
    margin-bottom: 48px;
}
.column-category:last-child {
    margin-bottom: 0;
}
.column-category__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-vivid-blue);
    display: inline-block;
}
.column-category__desc {
    font-size: 14px;
    color: var(--color-medium-gray);
    margin-bottom: 20px;
}

/* Column card */
.column-card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 768px) {
    .column-card-grid { grid-template-columns: repeat(2, 1fr); }
}

.column-card {
    display: flex;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
    text-decoration: none;
    color: inherit;
}
.column-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    transform: translateY(-2px);
    color: inherit;
}
.column-card__image {
    width: 120px;
    min-height: 100px;
    object-fit: cover;
    flex-shrink: 0;
}
.column-card__body {
    padding: 16px;
    flex: 1;
}
.column-card__title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
    line-height: 1.5;
}
.column-card__excerpt {
    font-size: 13px;
    color: var(--color-medium-gray);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.column-card__badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-vivid-blue);
    background: #EFF6FF;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 6px;
}
/* Placeholder for unpublished articles */
.column-card--placeholder {
    opacity: 0.5;
    pointer-events: none;
}
.column-card--placeholder .column-card__badge {
    background: var(--color-light-gray);
    color: var(--color-medium-gray);
}

@media (min-width: 768px) {
    .column-card__image {
        width: 160px;
        min-height: 120px;
    }
}

/* --- Column article page --- */
.article {
    max-width: 780px;
    margin: 0 auto;
}
.article__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.article__category-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-vivid-blue);
    background: #EFF6FF;
    padding: 4px 12px;
    border-radius: 4px;
}
.article__heading {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-navy);
    line-height: 1.5;
    margin-bottom: 32px;
}
.article__body {
    font-size: 16px;
    line-height: 2;
}
.article__body h2 {
    font-size: 20px;
    margin-top: 2em;
    margin-bottom: 0.8em;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-light-gray);
}
.article__body p {
    margin-bottom: 1.5em;
}
.article__body blockquote {
    border-left: 4px solid var(--color-orange);
    padding: 16px 20px;
    margin: 1.5em 0;
    background: #FFF7ED;
    border-radius: 0 8px 8px 0;
    font-weight: 600;
    color: var(--color-navy);
    line-height: 1.8;
}
.article__highlight {
    background: linear-gradient(transparent 60%, rgba(37,99,235,0.1) 60%);
    font-weight: 600;
}

/* Back to list link */
.article__back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}
.article__back::before {
    content: '←';
}

/* Related articles */
.related-articles {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid #E5E7EB;
}
.related-articles__heading {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 16px;
}

@media (min-width: 1024px) {
    .article__heading { font-size: 30px; }
    .article__body { font-size: 17px; }
    .article__body h2 { font-size: 22px; }
}