How to remove menubotton border when mouse over

[Aod47]

I want to remove menubotton border when mouse over it.
Could your please advice

Thank you

[stworthy]

Please overwrite the CSS styles as below:

Code:

<style type="text/css">
	.m-btn-plain-active,.m-btn-plain-active:hover{
		border-color: transparent;
	}
</style>

[Aod47]

Thank you, Sir.

I tried the code, but a border still appeared a few second when mouse over the border. T-T