.custom-merit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 30px;
    margin-bottom: 30px;
}

.merit-card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    box-sizing: border-box;
}

.merit-title {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    /* ここで濃いグレーの文字色を指定します */
    color: #2d3748;
    font-weight: 600;
    font-size: 1.25rem;
}

/* --- ここが重要です --- */
.merit-icon {
    margin-right: 12px;
    font-size: 1.4rem;
    /* brightness(0)を削除し、grayscale(100%)だけにします */
    filter: grayscale(100%);
}

.merit-card p {
    margin: 0;
    line-height: 1.6;
    color: #4a5568;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .custom-merit-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .merit-card {
        padding: 20px;
    }
}