*, *::after,::before{
    box-sizing: border-box ;
}
:root{
    --hue: 200;
    --saturation: 50%;
    --foreground-color: hsl(var(--hue),var(--saturation),75%);
    --background-color: hsl(var(--hue),var(--saturation),25%);
}
body {
    background-color:var(--background-color);
    margin: 0;
    overflow: hidden;
}
.paddle{
    --position: -40;
position: absolute;
background-color: var(--foreground-color);
width: 1vh;
height: 10vh;
top: calc(var(--position)*1vh);
transform: translate(-50%);
}
.paddle.left{
    left: 1vw;

}
.paddle.right{
    right: 1vw;

}
.ball{
    --x: 50;
    --y: 55;
position: absolute;
background-color: var(--foreground-color);
border-radius: 50%;
width: 2.5vh;
height: 2.5vh;
left: calc(var(--x) * 1vw );
top: calc(var(--y) * 1vh );
transform: translate(-50%,-50%);
}
.score{
    display: flex;
    justify-content: center;
    font-weight: bold;
    font-size: 7vh;
    color: var(--foreground-color); 
}
.score > * {
    flex-grow: 1;
    flex-basis: 0;
    padding: 0 2vh;
    margin: 1vh 0;
    opacity: .5;
}
.score > :first-child{
    text-align: right;
    border-right: .5vh solid var(--foreground-color);
}