body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: Arial, sans-serif;
    margin: 0;
    overflow: hidden;
    scrollbar-width: none; /* for Firefox */
}

body::-webkit-scrollbar {
    display: none; /* for Chrome, Safari, and Opera */
}

.display-item {
    display: none;
    width: 100%;
    height: 100%;
}

.display-item iframe {
    width: 100%;
    height: 100%;
    border: none;
    overflow: hidden;
    scrollbar-width: none; /* for Firefox */
}

.display-item iframe::-webkit-scrollbar {
    display: none; /* for Chrome, Safari, and Opera */
}