body {
    background-color: white;
    font-size: 13px;
    font-family: Arial;
    color: darkslategray;
}

input {
    width: 100px;
    height: 15px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    text-align: center;
    border-bottom: 1px #eee solid;
    border-top: 0px;
    border-left: 0px;
    border-right: 0px;
    font-size: 13px;
    font-family: Arial;
    outline: none;
}