News Webpage using CSS

Why would my bottom images not shrink to 100% of the parent height? It overwrote the parent height and made it taller. Also how do I make a container where nothing will go wider or taller then? Like I tried to do with the container holding everything. I thought if I set its height and width to a certain amount. Here I chose vw and vh, that it would fit everything in. Did I just not make the other things small enough? So then it had to override the height that was set. Or what was the reason? Because the website was bigger than the goal or preview I was given I used scale on the whole html to make it a tad smaller. That seems like not the best code if I were to guess.