Template:Homepagebanner/styles.css

p img {
    margin: 0;
    width: 100%;
    height: 100%;
}

.mw-parser-output img{
    margin: 0;
    width: 100%;
    height: 100%;
}

.banner img {
    margin: 0;
    width: 100%;
    height: 100%;
}