span[is-loading="done"] {
    display: none;
}

span[is-loading="loading"] {
    transform: rotateZ(45deg);
    perspective: 1000px;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    color: var(--second-background-color);
    position: fixed;
    background-color: var(--secondary-color);
    background-blend-mode: lighten;
    margin: 25vh calc(sin(70)*(50% - 40px));
}

span[is-loading="loading"]:before,
span[is-loading="loading"]:after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: inherit;
    height: inherit;
    border-radius: 50%;
    transform: rotateX(70deg);
    animation: 1s spin linear infinite;
}
span[is-loading="loading"]:after {
    color: var(--primary-color);
    transform: rotateY(70deg);
    animation-delay: .4s;
}

@keyframes rotate {
    0% {
        transform: translate(-50%, -50%) rotateZ(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotateZ(360deg);
    }
}

@keyframes rotateccw {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(-360deg);
    }
}

@keyframes spin {
    0%,
    100% {
        box-shadow: .2em 0px 0 0px currentcolor;
    }
    12% {
        box-shadow: .2em .2em 0 0 currentcolor;
    }
    25% {
        box-shadow: 0 .2em 0 0px currentcolor;
    }
    37% {
        box-shadow: -.2em .2em 0 0 currentcolor;
    }
    50% {
        box-shadow: -.2em 0 0 0 currentcolor;
    }
    62% {
        box-shadow: -.2em -.2em 0 0 currentcolor;
    }
    75% {
        box-shadow: 0px -.2em 0 0 currentcolor;
    }
    87% {
        box-shadow: .2em -.2em 0 0 currentcolor;
    }
}