body {
    margin: 0;
    padding: 0;
    right: 0;
    top: 0;
    background-color: black;
    overflow-x: hidden;
    overflow-y: auto;
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

    width: 100vw;
    height: 100dvh;

    display: grid;
    place-items: center;
}

body > img {
    width: 30%;
    animation: glow 1s infinite alternate;

}

@keyframes glow {
    from {
        opacity: 70%;
    }
    to {
        opacity: 30%;
    }
}