SLUview — 3-column layout demo

Files added/modified:

• SLUview.html — Updated to a semantic, responsive 3-column layout (left nav, main, right sidebar).
• styles.css — Simple responsive CSS using CSS Grid for the 3-column layout.

How to view:

1. Open SLUview.html in your browser (double-click or right-click -> Open With -> Browser).
2. Resize the browser to see the columns stack on smaller widths.