.letter-row {
    display: block;
    padding: 0;
    margin: 0;
}

.letter-row li {
    display: inline-block;
    width: 10vh;
    height: 10vh;
    background: #9954BB;
    color: #ffffff;
    font-size: 5vh;
    line-height: 9vh;
    text-align: center;
    border: 0.5vh solid #ffffff;
    margin: 0;
    padding: 0;
    list-style: none;
    border-radius: 50%;
}

.letter-row .dummy-block {
    background: transparent;
    color: transparent;
}

.letter-row li.current {
    background: #3FB618;
}