Four card Feature using only float

Some comments:

• Instead of naming your divs 'module1', 'module2', try to have more descriptive names for your HTML elements. For example, you can name them "text-content" or "features". CSS shorthands:
• For lines 104-107 of index.css, you can specify two values instead of four values: #module1 { padding: 0px 270px; } This has the same effect as your current code, but with less values specified.
• Same thing for line 98, which can be simplified to margin: 2em;
• For more information, google about CSS shorthand syntax for paddings/margins.

Font sizes:

• I personally found 1.3em too large on a screen size of 1440px, and preferred 1em instead.

Responsive design:

• The website switches to mobile layout on screen sizes less than 1440px, which to me is too large a breakpoint. There are laptops that have a screen size of >1000px, so the mobile layout looks too stretched out on these screen sizes. I recommend to google the common breakpoints and experiment with a suitable breakpoint to switch to mobile layout.