:root {
    --container-width: 350px;

    --ball-color: #531cb3;
    --ball-light-color: #aa7bc3;

    --animation-duration: 1500ms;
}

body,
html {
    height: 100%;
    overflow-x: hidden;
}

body {
    background-color: #333;
}

.container {
    height: 200px;
    width: var(--container-width);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    position: absolute;
    overflow: hidden;
    box-shadow: 0 0 0px 5px white;
}

.ball {
    height: 100px;
    width: 100px;
    border-radius: 100%;
    background-color: var(--ball-color);
    bottom: 0;
    position: absolute;
    transform-origin: 50% 100%;
    transform: translateX(200%);
    z-index: 10;
    animation: move var(--animation-duration) ease-in-out infinite alternate;
}

.ball::before {
    content: '';
    height: 5px;
    width: calc(var(--container-width) * 2);
    background-color: var(--ball-color);
    right: 55%;
    bottom: 0;
    position: absolute;
    z-index: -10;
    animation: counter-scale var(--animation-duration) ease-in-out infinite alternate;
}

.circle {
    position: absolute;
    height: 100%;
    width: 100%;
    animation: rotate var(--animation-duration) ease-in-out infinite alternate;
}

.circle > circle {
    r: 40px;
    cx: 50;
    cy: 50;
    stroke: var(--ball-light-color);
    stroke-width: 4;
    fill: transparent;
    stroke-linecap: round;
    stroke-dasharray: 50 1000;
}

@keyframes move {
    0%,
    10% {
        transform: translateX(-100%) scale(1);
    }

    90%,
    100% {
        transform: translateX(250%) scale(0.6);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(720deg);
    }
}

@keyframes counter-scale {
    from {
        transform: scaleY(1);
    }

    to {
        transform: scaleY(1.4);
    }
}