body {
    margin: 0;
}
.stage {
    animation: animateBg 10s linear infinite;
    background-image: linear-gradient(0deg,#cf5c5c,#c19b4a,#def2a0,#c6ee4a,#42eca6,#64b3d9,#208ea2,#498ada,#5b73df,#897ed3,#cf5c5c,#c19b4a);
    background-size: 100% 1100%;
    height: 100vh;
    width: 100vw;
}
@keyframes animateBg {
    0% { background-position: 0% 0%; }
    100% { background-position: 0% 100%; }
}
.container {
    position: relative;
    width: 100vw;
    height: 90vh;
    margin: auto;
}
.element {
    position: absolute;
    top: 0; bottom: 0; left: 0; right: 0;
    margin: auto;
    height: 20px;
    vertical-align: auto;
}
.form {
    display: flex;
    vertical-align: inherit;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    align-items: center;
}
.space {
    padding-right: 10px;
}