textarea {
    min-height: 400px;
    font-size: 16px;
}

#value {
    width: 100px;
    text-align: center;
    margin: 0 5px;
}

#start {
    margin-left: 15px;
}

@media screen and (max-width: 800px) {
    #frm-chr {
        text-align: center;
    }

    #start {
        margin-top: 15px;
        margin-left: 0;
        width: calc(100% - 25px);
    }
}