.animated-gradient {
    background:linear-gradient(209deg, #21718b, #514a9d);
    background-size: 400% 400%;
    -webkit-animation: d-archive-gradient 22s ease infinite;
    -moz-animation: d-archive-gradient 22s ease infinite;
    -o-animation: d-archive-gradient 22s ease infinite;
    animation: d-archive-gradient 22s ease infinite;
}

@-webkit-keyframes d-archive-gradient {
    0%{background-position:92% 0%}
    50%{background-position:9% 100%}
    100%{background-position:92% 0%}
}
@-moz-keyframes d-archive-gradient {
    0%{background-position:92% 0%}
    50%{background-position:9% 100%}
    100%{background-position:92% 0%}
}
@-o-keyframes d-archive-gradient {
    0%{background-position:92% 0%}
    50%{background-position:9% 100%}
    100%{background-position:92% 0%}
}
@keyframes d-archive-gradient {
    0%{background-position:92% 0%}
    50%{background-position:9% 100%}
    100%{background-position:92% 0%}
}