styles.css

div.wirisanswerfielddecoration.wirisembeddeddecoration.wirisincorrect,
div.wirisanswerfielddecoration.wiriseditordecoration.wirisincorrect div.wiriseditorwrapper {
    background-image: url([[pix:core|i/grade_incorrect]]) !important; /* stylelint-disable-line declaration-no-important */
}

div.wirisanswerfielddecoration.wirisembeddeddecoration.wiriscorrect,
div.wirisanswerfielddecoration.wiriseditordecoration.wiriscorrect div.wiriseditorwrapper {
    background-image: url([[pix:core|i/grade_correct]]) !important; /* stylelint-disable-line declaration-no-important */
}

div.wirisanswerfielddecoration.wirisembeddeddecoration.wirispartiallycorrect,
div.wirisanswerfielddecoration.wiriseditordecoration.wirispartiallycorrect div.wiriseditorwrapper {
    background-image: url([[pix:core|i/grade_partiallycorrect]]) !important; /* stylelint-disable-line declaration-no-important */
}

div.rightanswer .wrsUI_app.wrsUI_graph {
    max-width: 800px;
    height: 453px;
}

div .answer .wrsUI_quizzesAnswerField .wrsUI_mathTypeComponent .wrsUI_inlineMathEditor {
    display: flex;
    flex-direction: row;
}