[Theme Horse Support Team]

Hi Weliajolijn,

Please try below CSS

#content #mc_embed_signup .mc-field-group input[type="text"],
#content #mc_embed_signup .mc-field-group input[type="email"],
#content #mc_embed_signup .mc-field-group input[type="password"]{
    margin: 0 15px;
    width: 20%;
}
@media only screen and (max-width: 767px) {
#content #mc_embed_signup .mc-field-group input[type="text"],
#content #mc_embed_signup .mc-field-group input[type="email"],
#content #mc_embed_signup .mc-field-group input[type="password"] {
        margin: 0 0 30px;
        width: 100%;
    }
}

If it still doesn’t work then email us you temporary username and password to [email protected] we will set it for you.

Thank you for using our theme