.list-thumbnail-letters {
    width: 85px;
    height: 85px;
    background: #59968A;
    align-items: center;
    display: flex;
    justify-content: center;
    font-size: 1.25rem;
    color: #d0d0d0;
}

@media (max-width: 991px) {
    .list-thumbnail-letters {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 575px) {
    .list-thumbnail-letters {
        width: 70px;
        height: 70px;
    }
}

.list-thumbnail-letters.small {
    width: 60px;
    height: 60px;
    font-size: 1rem;
}

@media (max-width: 991px) {
    .list-thumbnail-letters.small {
        width: 55px;
        height: 55px;
    }
}

@media (max-width: 575px) {
    .list-thumbnail-letters.small {
        width: 50px;
        height: 50px;
    }
}