div.alphabet {
    position: relative;
    display: table;
    width: 100%;
    margin-bottom: 1em;
}

div.alphabet span {
    display: table-cell;
    color: #3174c7;
    cursor: pointer;
    text-align: center;
    width: 3.5%;
}

div.alphabet span:hover {
    color: white;
    font-weight: bold;
    background: black;
    border-radius: 5px;
}

div.alphabet span.active {
    color: white;
    font-weight: bold;
    background: black;
    border-radius: 5px;
}

div.alphabet span.empty {
    color: red;
}

div.alphabetInfo {
    display: block;
    position: absolute;
    background-color: #111;
    border-radius: 3px;
    color: white;
    top: 2em;
    height: 1.8em;
    padding-top: 0.4em;
    text-align: center;
    z-index: 1;
}