header
{
    text-align: center;
    margin-top: 7%;
    margin-bottom: 5%;
}

main
{
    text-align: center;
}

button
{
    margin-top: 3px;
    margin-bottom: 10px;
    min-width: 20%;
}

fieldset
{
    border: none;
}

input
{
    margin: 10px;
}