Why aren't my base styles updating in the preview?
If you're removing styling from a base style, those styles still apply until you have saved the base style.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Base styles are CSS styles for HTML elements.
We recommend using decimals e.g. 1.3 as this makes the line height relate to your font size.
You don’t have to add units unless you want to use a specific unit or you’re adding Custom CSS properties.
The Youtube video embed is responsive so it should expand to the width of its parent. If you do need to set a width you can apply the Width CSS property through the Style Builder.