We've received a complaint that your project isn't just inspired by Papertrail but copies its UI wholesale. This seems to me a borderline case: your project seems legit in that it isn't just a ripoff of someone else's work, but the complaint seems legit too, because cloning their UI (including copying some CSS) is taking a lot more than inspiration.

We've edited the title above to clarify this in a way that attempts to be fair and neutral. (The submitted title was 'Show HN: Logtrail – A Kibana plugin to view, search and tail logs and events'.)