We use JIRA's Issue Collector as a feedback tool for our webpage, where all of our pageviewers can create/raise issues and/or feedback. There is no problem with that since it's working fine. One thing bothering us, is the fact, that we can't change the css of that field that's popping up on the screen after using that feedback button. We would like to adjust the height and maybe some other stuff but the .css for that window is on the path: JIRA-INSTANCE/s/de_DEx9r5sb-418945332/812/27/1.2.7/_/download/batch/com.atlassian.jira.collector.plugin.jira-issue-collector-plugin:form-collector/com.atlassian.jira.collector.plugin.jira-issue-collector-plugin:form-collector.css. where we don't have access to (edit/change).
How is it possible to change the style of it?