#css-pokeball {
    display: inline-block;
    height: 50px;
    width: 50px;
    position: relative;
}

#css-pokeball > #background-circle {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border-radius: 50%;
    background-color: black;
}

#css-pokeball > #top-half-circle {
    position: absolute;
    top: 0;
    left: 0;
    height: 45%;
    width: 100%;
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    background-color: red;
}

#css-pokeball > #bottom-half-circle {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 45%;
    width: 100%;
    border-radius: 0 0 50% 50% / 0 0 100% 100%;
    background-color: white;
}

#css-pokeball > #middle-black-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 25%;
    width: 25%;
    border-radius: 50%;
    background-color: black;
}

#css-pokeball > #middle-white-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 15%;
    width: 15%;
    border-radius: 50%;
    background-color: white;
}