/* Background, set animations for moving a span and rotating it*/
@keyframes move {
    100% {
        transform: translate3d(0, 0, 1px) rotate(360deg);
    }
}

/* Then set the background to fill the entire screen, behind text, in the correct colour */
.background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    background: #0b0b12;
    z-index: -1;
    overflow: hidden;
}

/* Set spans to be circles with the animation */
.background span {
    width: 2vmin;
    height: 2vmin;
    border-radius: 2vmin;
    backface-visibility: hidden;
    position: absolute;
    animation: move;
    animation-duration: 45s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

/* Set content to be centred on the screen and a fixed size*/
.content {
    position: absolute;
    top: 0%;
    left: 50%;
    width: 65%;
    max-width: 750px;

    transform: translate(-50%, 0%);
    text-align: center;
    transition: width 0.5s ease;
}

@media (max-width: 600px) {
    .content {
        width: 90%;
    }
}