What is a one-sentence summary of the following article?
CSS be applied in the head of an HTML document, or it can be written as an external CSS document. The head of an HTML document is at the top of the file. It's in between the "<head>" and "</head>" tags. The style section goes in the head of your HTML code, or on a separate style sheet. Use the following tags to create a style section in your HTML or style sheet document. Type <style> to open your style secton. All CSS code goes after this tag. Type </style> to close your style secton. All CSS code goes before this closing tag. p {indent-text: 5em;} This creates tells the browser to create an indent space of 5 spaces when at the proper HTML code. You can adjust the number of spaces by typing a different number after "indent-text:". The "em" unit is equivalent to one space at the specified font size. You can use other units, such as percentage (i.e. "indent-text: 15%;") or measurements (i.e "indent-text: 3mm;"). This goes in the body of your HTML document anywhere you want to indent your text. This will add an indent in your text that matches the specifications in your CSS.

Summary:
Open an HTML or CSS document. Create a style section for your CSS. Type the following tag in the style area: Type <p> where you want to add an indent space.