Change border color to text input node

[arjak11]

I think I figured it out myself and will share it here in case someone is trying to do the same. Inspired by this thread: Dashboard element css classes - #13 by Steve-Mcl

To target an individual node, use its node id (found in the sidebar under the Info tab), e.g.

<style>
[node-id="00000x00.x000x0"] {border: {{((msg.payload === "something")) ? 'red' : 'transparent'}} 1px dashed;}
</style>

Hope it helps~