/* Make a cute little box. */

.box {
  display: block;
  /* Horizontally centers a block element with width. */
  margin: auto;
  width: 70%;
  border-style: solid;
  text-align: center;
  /* Respect linebreaks and wrap as needed. */
  white-space: pre-wrap;
}

I've tried to dip my toes into website creation a lot of times over the course of my life and for some reason always got stuck just trying to make a normal, centered box. I finally did it. I'm the dog who caught her white whale.