:root {
    --hue: 223;
    --bg: hsl(var(--hue),10%,90%);
    --fg: hsl(var(--hue),10%,10%);
}


main {
    padding: 1.5em 0;
}

.ap {
    width: 8em;
    height: 16em;
}

.ap__ring {
    stroke: hsla(var(--hue),10%,10%,0.15);
    transition: stroke 0.3s;
}

.ap__worm1,
.ap__worm2 {
    animation-duration: 3s;
    animation-iteration-count: infinite;
}

.ap__worm1 {
    animation-name: worm1;
}

.ap__worm2 {
    animation-name: worm2;
    visibility: hidden;
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: hsl(var(--hue),10%,10%);
        --fg: hsl(var(--hue),10%,90%);
    }

    .ap__ring {
        stroke: hsl(223.17deg 72.24% 7.68% / 10%);
    }
}

/* Animtions */
@keyframes worm1 {
    from {
        animation-timing-function: ease-in-out;
        stroke-dashoffset: -87.96;
    }

    20% {
        animation-timing-function: ease-in;
        stroke-dashoffset: 0;
    }

    60% {
        stroke-dashoffset: -791.68;
        visibility: visible;
    }

    60.1%, to {
        stroke-dashoffset: -791.68;
        visibility: hidden;
    }
}

@keyframes worm2 {
    from, 60% {
        stroke-dashoffset: -87.96;
        visibility: hidden;
    }

    60.1% {
        animation-timing-function: cubic-bezier(0,0,0.5,0.75);
        stroke-dashoffset: -87.96;
        visibility: visible;
    }

    77% {
        animation-timing-function: cubic-bezier(0.5,0.25,0.5,0.88);
        stroke-dashoffset: -340;
        visibility: visible;
    }

    to {
        stroke-dashoffset: -669.92;
        visibility: visible;
    }
}