body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    
    /* Apply the leather pattern */
    background-image: url('img901.PNG');
    
    /* Ensures the image covers the whole screen without leaving gaps */
    background-size: cover; 
    
    /* Keeps the background centered */
    background-position: center; 
    
    /* Ensures the background stays put if the page is scrolled */
    background-attachment: fixed; 
}