#actual-body {
    position: relative;
    width: 100vw;
    height: 100vh;

    top: 0;
    left: 0;
    transform: 
                scale(var(--zoom)) 
                rotate(calc(var(--rotate) * 1deg)); /* used for screen-shake zoom in*/
    transition: transform 0.15s ease;
}

.screen-shake {
    animation: 
                screen-shake-animation calc((var(--duration) * 0.001s) * var(--gameSpeed)) ease-out;
}

@keyframes screen-shake-animation {
    0% { left: 0; }
    10% { left: calc(var(--intensity) * -1px); }
    20% { left: calc(var(--intensity) * 1px); }
    40% { left: calc(var(--intensity) * -1px); }
    60% { left: calc(var(--intensity) * 1px); }
    80% { left: calc(var(--intensity) * -1px); }
    100% { left: 0; }
}