[Theme Horse Support Team]

@contact22 some of the CSS code have been override by one of the plugins that you have installed into your site so please go to Appearance -> Customize/Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save button:

#access a {
	-moz-box-sizing: unset;
	-webkit-box-sizing: unset;
	box-sizing: unset;
}

Thank you for using our theme.