/* The page occupies 100% of the screen */
html {
    height: 100%;
    width: 100%;
}

/* The content occupies the entire space available */
body {
    height: 100%;
    margin: 0;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* Transform the page into a 1-column grid (for future use with more columns) */
#holder {
    display: grid;
    grid-template-columns: 1fr; /* just on column */
    height: 100%;
}

/* The grid contains the model and occupies 100% of the available space */
model-viewer {
    width: 100%;
    height: 100%;
    outline: none;
}