First, on your home page, when I first went to it, I got the following error:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 31532559 bytes) in /home/<YOUR_SITE>/plugins/system/debug/debug.php on line 1109
128MB of RAM is a huge amount of memory to use to render the page. There may be some extensions behaving badly on your site. When I reloaded the page, it worked fine though.. but something to be aware of.
As for the SCLogin issues, your template is applying some styles which are conflicting with our styles. The conflicting code is below. You'll need to determine how best to fix these styles for your site:
Modal
templates/ot_dergi/local/css/bootstrap.css ~line 5750
@media (min-width: 768px) {
.modal-dialog {
width: 600px;
margin: 30px auto;
}
templates/ot_dergi/local/css/template.css ~line 2530
@media screen and (min-width: 768px) {
.modal-dialog {
width: 600px;
margin: 30px auto;
}
Button
templates/ot_dergi/local/css/template.css ~line 2747
.t3-navbar .ot-modal button {
width: 50px;
height: 50px;
}
I hope that helps narrow things down for you,
Alex