Feb 16 | External CSS, , Relative Units(%) and Flex

February 16 we started working with external CSS documents, which allow sharing a stylesheet across multiple documents. We also designed site navigation with <header> and <nav> elements, and used the % relative unit and the “flex” display property to make a layout automatically resize itself for the current window.

External CSS

• How to Add CSS
• The <link> element

New HTML Elements

• <header>
• <nav>

New CSS Concepts

• Basic Concepts of Flexbox
• CSS Units Overview
• Interactive % Units Demo