#settings { grid-area: settings; }
#original-img { grid-area: original-img; }
#transformed-img { grid-area: transformed-img; }


#container {
    display: grid;
    grid-template-areas: 'settings original-img transformed-img';
    gap: 1em;
    width: fit-content;
}

#settings {
    width: 500px;
}

#settings div, input, label {
    padding: 5px;
}

#settings fieldset {
    margin: 10px;
}