.sa-el-color-transition {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index: auto;
    -webkit-transition: all .7s ease;
    -moz-transition: all .7s ease;
    -o-transition: all .7s ease;
    -ms-transition: all .7s ease;
    transition: all .7s ease;
}
.sa-el-color-transition .sa-el-color-transition-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: all .5s ease;
    -moz-transition: all .5s ease;
    -o-transition: all .5s ease;
    -ms-transition: all .5s ease;
    transition: all .5s ease;
    transition-duration: 0.5s;
}
.sa-el-color-transition-layer.layer-active {
    opacity: 1;
    visibility: visible;
}
.sa-el-color-transition .sa-el-color-transition-layer::after {
    position: absolute;
    content: '';
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: all .5s ease;
    -moz-transition: all .5s ease;
    -o-transition: all .5s ease;
    -ms-transition: all .5s ease;
    transition: all .5s ease;
}
.sa-el-bg-transition-hidden {
    opacity: 0;
    visibility: hidden;
}