a1111-mini-paint/style.css

#a1111minipaint_iframe {
    display: block;
    width: 100%;
    height: calc(90vh);
    min-height: 750px;
}

/* Workaround for ashen-sensored/stable-diffusion-webui-two-shot */
#a1111minipaint_iframe .output-html {
    display: block;
}