Go to the sp_layout. css file and then to the Window and Body Styles section. Create a style rule for the html element that sets the height of the browser window at 100%. Create a style rule for the page's body element that:
sets the width to 95% of the browser window ranging from 640 pixels up to 960 pixels,
horizontally center the page's bodyelement within the browser window,
finally, Karen wants to ensure that the height of the page body is always at least as high as the browser window itself. Set the minimum height of the browser window to 100%.
Create a style rule to apply the Border Box model to all header, ul, nav, li, and a elements in the document.
Row & Page Header Styles
Go to the Row Styles section. Karen has placed all elements that should be treated as grid rows in the row class. For every element of the row class, create a style rule that expands the element to cover any floating content within the element. (Hint: Use the technique shown in the tutorial that employs the after pseudo-element.)
Go to the Page Header Styles section. In this section, you will create styles for the content of the body header. Create a style rule for the logo image within the body header that displays the image as a block with a width of 70% of the header, floated on the left margin.
The header also contains a navigation list that Karen wants to display vertically. Create a style rule for the nav element within the body header that:
floats the navigation list on the left,
sets the size of the left and right padding to 2%,
sets the width of the navigation list to 30% of the width of the header.
The hypertext links in the navigation list should be displayed as blocks. Create a style rule for every a element in the header navigation list that displays the element as a block with a width of 100%.
Horizontal Navigation List Styles
Go to the Horizontal Navigation List Styles section. Karen has added a second navigation list that she wants to display horizontally. For all list items within the horizontal navigation list, create a style rule that displays the items as blocks with a width of 12.5% floated on the left margin.
HR Styles
Go to the HR Styles section. The hr element is used to display a horizontal divider between sections of the page. Add a style rule that sets the width of the hr element to 50%.
Footer Styles
Go to the Footer Styles section and create a style rule that displays the footer only when both margins are clear of floating objects.