CSS for the Znode themes is developed by a Znode Developer and then loaded to Znode for you to use on stores. There are times when you may want to make a small change quickly, without waiting for a developer to update the CSS.
Znode provides content editors the Dynamic Styles feature in the Store Experience of Admin, to override some CSS items. You will be able to override CSS styles, here without a developer. However, for consistency and continued compatibility with upgrades, it is a best practice to have the developer make these changes in the CSS file as soon as possible. Once this happens you can remove your temporary CSS overrides from Store Experience.
Navigate to: CMS > Store Experience