document.getElementById("cards").onmousemove = (e) => {
    for (const CARD of document.getElementsByClassName("card")) {
        const RECT = CARD.getBoundingClientRect(),
            x = e.clientX - RECT.left,
            y = e.clientY - RECT.top
        CARD.style.setProperty("--mouse-x", `${x}px`)
        CARD.style.setProperty("--mouse-y", `${y}px`)
    }
}