px is missing in background position
@keyframes animatedBackground {
from { background-position: -405px 0; }/*1048+ - Default Styles*/
to { background-position: 1090px 0; }/*1048+ - Default Styles*/
}
@-webkit-keyframes animatedBackground /* Safari and Chrome */
{
from { background-position: -405px 0; }/*1048+ - Default Styles*/
to { background-position: 1090px 0; }/*1048+ - Default Styles*/
}
Hope you are testing the page in Chrome.