CSS Modal Popup

Where could I go about centering the modal login form?

so after a bunch of tinkering and playing around i got this in my template override folder..... But my problem is then that it also centers the modal button on the main page which i dont really like but the pop up is fully centered like i like....


div.sclogin-social-login {
text-align:center;
}

div.sclogin-social-login .social-login {
float:none;
display:inline-block;
}

div.sclogin {
overflow: visible;
text-align: center !important;
}