*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    user-select: none;
}
canvas, #controls, #start{
    position: absolute;
    width: 640px;
    height: 480px;
    max-height: 100%;
    max-width: 100%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    
}
canvas{
    border: 2px solid black;
    background-color: black;
    background: url('PongBackground_02.png');
    background-position: center;
    background-size: cover;
    
}
#controls{
    z-index: 10;
    border: 2px solid green;
    
}
#left{
    position: absolute;
    bottom: 0;
    left: 0;
    font-size: 3rem;
    width: 20%;
}
#right{
    position: absolute;
    bottom: 0;
    right: 0;
    font-size: 3rem;
    width: 20%;
}
button{
    background: transparent;
    color: white;
}

#start{
    z-index: 10;
    border: 2px solid white;
    display: flex;
    align-items: center;
    justify-content: center;
}
#startButton {
    font-size: 3rem;
}
img{
    display: none;
}