There is a problem that theme is not resizing according to mobile screen size and one more problem that there is a Spanish text when you click login below password box.
My phone Lumia 520
See screen shots.
Thanks
Edit:
I had observed the code which is causing problem
It is a code in portal.css of simpleportal
Here it is body
{
min-width: 750px;
}
i had modified it to body
{
min-width: device-width;
}