/* ===================================
   歯に関するコラムセクション
   =================================== */
.column-section {
    background-color: var(--bg-light);
    padding: 80px 0;
}

.column-list {
    max-width: 900px;
    margin: 0 auto;
}

.column-item {
    background-color: var(--bg-white);
    border-radius: 10px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.column-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.column-link {
    display: flex;
    align-items: center;
    padding: 20px 25px;
    gap: 20px;
    color: var(--text-color);
    text-decoration: none;
}

.column-date {
    flex-shrink: 0;
    font-size: 14px;
    color: var(--text-light);
    min-width: 120px;
}

.column-badge {
    flex-shrink: 0;
}

.category-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, #FF9A6C 0%, #FF6B6B 100%);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    min-width: 80px;
}

.column-title {
    flex: 1;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.6;
    transition: color 0.3s ease;
}

.column-item:hover .column-title {
    color: var(--primary-color);
}

.btn-column {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 40px;
    background-color: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 30px;
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-column:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .column-section {
        padding: 60px 0;
    }
    
    .column-link {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 20px;
        gap: 10px;
    }
    
    .column-date {
        min-width: auto;
        font-size: 13px;
    }
    
    .category-badge {
        padding: 5px 12px;
        font-size: 12px;
        min-width: 70px;
    }
    
    .column-title {
        font-size: 15px;
    }
    
    .btn-column {
        padding: 12px 30px;
        font-size: 14px;
    }
}