/* case-box専用のスタイル */
.case-box-container {
    display: grid;
    gap: 20px;
    margin: 40px 0;
}

.case-box {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 20px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text01);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    display: block;
}

.case-box::before {
    content: attr(data-number);
    color: var(--case-number);
    font-weight: bold;
    font-size: 1.8rem;
    font-family: 'Montserrat', sans-serif;
    display: block;
    margin-bottom: 5px;
}

.case-box:hover {
    background-color: var(--hover03);
}

/* PC版: 3列レイアウト */
@media (min-width: 769px) {
    .case-box-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* スマホ版: 2列レイアウト */
@media (max-width: 768px) {
    .case-box-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .case-box {
        padding: 15px;
        font-size: 1rem;
    }
}