.char-field {
    width: 45px;
    height: 45px;
    background: #90a2aa;
    border: 1px #90a2aa;
    color: #fff;
    border-radius: 8px;
    outline: none;
    margin: 1px;
    line-height: 30px;
    padding-top: 0;
    padding-bottom: 0;
    box-shadow: none;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    font-weight: normal;
    font-size: 21px;
    text-align: center;
}