body{
    background-image: url('https://files.catbox.moe/gu4p96.png');
    background-attachment: fixed;
    background-position: center;
    background-size: 200px auto;
    background-color: rgb(63, 63, 63);
    overflow: hidden;
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}