directly from the previous version of base html at we place second list of navigation linksthis time using the selector navbar-right the navbar-right selector styles the set of links so it appears at the right edge of the navigation bar where you typically see login and registration links here we'll display the user greeting and logout link or links to register or log in the rest of the code in this section closes out the elements that contain the navigation bar defining the main part of the page the rest of base html contains the main part of the page--snipu {block header %}{endblock header %{block content %}{endblock content %at is an opening div with the class container div is section of web page that can be used for any purpose and can be styled with borderspace around the element (margins)space between the contents and the border (padding)background colorsand other style rules this particular div acts as container into which we place two elementsa new block called header and the content block we used in the header block contains information telling the user what kind of information the page holds and what they can do on page it has the class page-headerwhich applies set of style rules to the block the content block is in separate div with no specific style classes when you load the home page of learning log in browseryou should see professional-looking navigation bar that matches the one shown in figure - try resizing the window so it' really narrowthe navigation bar should be replaced by button click the buttonand all the links should appear in drop-down list note this simplified version of the bootstrap template should work on most recent browsers earlier browsers may not render some styles correctly the full templateavailable at available browsers