form {
    margin-left: 15px;
} 

input {
    padding: 5px;
    margin-top: 5px;
    margin-bottom: 5px;
    border-radius: 3px;
    border: 1px solid;
    font-size: 14px;
}
@media screen and (max-width: 600px)
{   
    label {
        font-size: 18px;
    }
}
@media screen and (min-width: 601px)
{
    label {
        font-size: 16px;
    }
}