Removing margin/padding from tablist

Hello,

I have found that your plugin works in 4.7.3 which is great.

I have an issue which I have not been able to resolve and I was hoping you may be able to assist.

I have the tabs setup but for some reason I have a bit of padding/margin in the left hand side which I cannot find in the CSS to remove.
the padding/margin is before the pt-tabs__navigation nav nav-tabs but I can’t find where this is to edit it or to find a way to remove the padding/margin.

The test page is here:
https://www.thegorbals.co.uk/wordpresstest/present/the-gorbals-directories/

The first tab is inset from the margin of the content below which is not the way it should be as it should align vertically with the content below.

Let me know if you have come across this before at all. Apologies if it is something which I have overlooked.

I’d appreciate your inout as I am hoping to make good use of your plugin.

Many thanks

anthonyod