Access the Custom CSS Theme Options via Appearance > Customize > Custom CSS or via Appearance > Theme Options > Custom CSS.
Custom CSS
If you require changes to the CSS on your site, use Custom CSS field to override the default CSS. This is safe from updates.
Please note: Only use this option if you have experience using CSS.
Mobile CSS
If you require changes to the CSS on your site for Mobile devices, use Mobile CSS field to override the default CSS. This CSS becomes active when screen sizes are less than 1025px. This is safe from updates.
Please note: Only use this option if you have experience using CSS.