Margin & Padding
The CSS properties "margin" and "padding" allow the use of shorthand declarations, meaning we can state all the "-top", "-left", "-bottom", and "-right" attributes in one call.
margin: [top] [right] [bottom] [left]; margin: [top&bottom] [left&right]; margin: [top] [left&right] [bottom]; margin: [top&left&bottom&right]; padding: [top] [right] [bottom] [left]; padding: [top&bottom] [left&right]; padding: [top] [left&right] [bottom]; padding: [top&left&bottom&right];

You have an error in your information and I didn't see your email address on the page. Top Left Bottom Right is incorrect. It should Top Right Bottom Left.
Thanks for catching that!