After adding the thumbnail class to my thumbnails div, I noticed that some of the thumbnails were smaller in size than others. Wanting them all to have the same height, I decided to give each thumbnail a fixed height of 210px. However, this caused the smaller thumbnails to extend below the rest when aligned horizontally. I tried setting the css property top: 0px;
on each thumbnail, but unfortunately that didn't solve the issue. How can I ensure that all my thumbnails are the same height and perfectly aligned horizontally?