The main content area is aligned left with the banner and header. ... For responsive web design the W3C has embarked on the CSS Flexible Box Layout Module or “Flexbox” for short.

The banner ad that’s widely described as the first ever was a little rectangle purchased by AT&T on HotWired.com in 1994. About 44 percent of the people who saw it actually clicked on it.

1994: Wired.com, then known as HotWired, invents the web banner ad. Go ahead, blame us. The Mosaic browser was just morphing into Netscape in 1994. And if you think ads slow down page loads now ...