#demo {
    font-size: 20px;
    text-align: center;
    line-height: 100px;
    width: 80%;
    /* margin: 1em auto 1em auto; */
    height: 107px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
    border: 1px solid #000000;
    background-color: #ffffff;
    color: #000000;
}

#demo:focus {
    outline: none
}

#demo-container {
    background-color: #cccccc;
    padding: 15px;
    width: 100%;
    height: 185px;
}