body { margin:0; 
-ms-overflow-style: none; /* IE and Edge */
    scrollbar-width: none; /* Firefox */
}
body::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera*/
}

/* Initially hide the content */
body {
    opacity: 0;
    transition: opacity 1s ease-in; /* Fade-in duration */
}

/* When the page is fully loaded */
body.fade-in {
    opacity: 1;
}