html
{
   height: 100%;
}

html, body, .fullscreen-module
{
   position: absolute;
   top: 0;
   bottom: 0;
   right: 0;
   left: 0;
}

.fullscreen-module
{
   display: flex;
   flex-flow: column;
   align-content: stretch;
   justify-content: stretch;
}

.global-ingame-header
{
   text-align: center;
   flex: 0;
}