iframed.css

body, html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0
}

iframe {
    display: flex;
    flex-grow: 1; border: none; margin: 0; padding: 0; 
}

iframe:focus {
    outline: none;
}

.adminContainer {
    display: flex;
    width: 100%;
    height: 100%;
    flex-direction: row;
    overflow: hidden;
}
.frameGrow {
    flex-grow: 1;
    border: none;
    margin: 0;
    padding: 0;
}