html {
    font-family: sans-serif;
}
#saveCSVSubmit {
    width: 100%;
    display: block;
    margin-bottom: 10px;
}
#err {
    background: #f2dede;
    display: block;
    padding: 15px;
    margin-bottom: 10px;
    color: #333;
}

html {
    font-family: sans-serif;
}
input {
    margin-bottom: 0.6em;
}
#err {
    background: #f2dede;
    display: block;
    padding: 15px;
    margin-bottom: 10px;
    color: #333;
}

Remove submit key max-width CSS, add input CSS
Remove submit key max-width CSS, add input CSS
