body {
    margin: 0;
    padding: 0;
    background-color: #222;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: sans-serif;
}

/* The Main Wrapper (1080x1920) */
main {
    position: relative;
    width: 1080px;
    height: 1920px;
    background: #fff;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

/* LAYER 1: The External SVG Object */
#svg-object {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    /* Bottom Layer */
}

/* LAYER 2: The Message Box (Iframe) */
.message-box {
    position: absolute;
    z-index: 10;
    /* Top Layer */

    /* YOUR DIMENSIONS */
    width: 854px;
    height: 754px;

    /* POSITIONING (Adjust these to fit your design) */
    top: 450px;
    left: 113px;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
    overflow-y: auto;
}