.sp {
    display: block;
    width: 2em;
    height: 2em;
}

.sp__ring {
    stroke: hsla(var(--hue), 90%, 5%, 0.1);
    transition: stroke 0.3s;
}

.sp__worm1,
.sp__worm2,
.sp__worm2-1 {
    animation: worm1 5s ease-in infinite;
}

.sp__worm1 {
    transform-origin: 64px 64px;
}

.sp__worm2,
.sp__worm2-1 {
    transform-origin: 22px 22px;
}

.sp__worm2 {
    animation-name: worm2;
    animation-timing-function: linear;
}

.sp__worm2-1 {
    animation-name: worm2-1;
    stroke-dashoffset: 175.92;
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: hsl(var(--hue), 90%, 5%);
        --fg: hsl(var(--hue), 90%, 95%);
    }

    .sp__ring {
        stroke: hsla(var(--hue), 90%, 95%, 0.1);
    }
}

/* Animations */
@keyframes worm1 {

    from,
    to {
        stroke-dashoffset: 0
    }

    12.5% {
        animation-timing-function: ease-out;
        stroke-dashoffset: -175.91;
    }

    25% {
        animation-timing-function: cubic-bezier(0, 0, 0.43, 1);
        stroke-dashoffset: -307.88;
    }

    50% {
        animation-timing-function: ease-in;
        stroke-dashoffset: -483.8;
    }

    62.5% {
        animation-timing-function: ease-out;
        stroke-dashoffset: -307.88;
    }

    75% {
        animation-timing-function: cubic-bezier(0, 0, 0.43, 1);
        stroke-dashoffset: -175.91;
    }
}

@keyframes worm2 {

    from,
    12.5%,
    75%,
    to {
        transform: rotate(0) translate(-42px, 0);
    }

    25%,
    62.5% {
        transform: rotate(0.5turn) translate(-42px, 0);
    }
}

@keyframes worm2-1 {
    from {
        stroke-dashoffset: 175.91;
        transform: rotate(0);
    }

    12.5% {
        animation-timing-function: cubic-bezier(0, 0, 0.42, 1);
        stroke-dashoffset: 0;
        transform: rotate(0);
    }

    25% {
        animation-timing-function: linear;
        stroke-dashoffset: 0;
        transform: rotate(1.5turn);
    }

    37.5%,
    50% {
        stroke-dashoffset: -175.91;
        transform: rotate(1.5turn);
    }

    62.5% {
        animation-timing-function: cubic-bezier(0, 0, 0.42, 1);
        stroke-dashoffset: 0;
        transform: rotate(1.5turn);
    }

    75% {
        animation-timing-function: linear;
        stroke-dashoffset: 0;
        transform: rotate(0);
    }

    87.5%,
    to {
        stroke-dashoffset: 175.92;
        transform: rotate(0);
    }
}