Actually, you're link above did work and I just tested. The following 2 styles are what's causing the login popup to be hidden:
/templates/petrospot/css/bootstrap.min.css line 84
.hide {
display: none !important;
}
That should not have the !important attribute on it as it prevents other Bootstrap styles from overriding that basic statement.
Also, the style below is making the box shift all to the right, which probably isn't correct.
/templates/petrospot/css/petrospot.css , line 13
.sourcecoast {
float:right;
}
I hope that helps,
Alex