CSS Center Align

.center {
  margin: auto;
  width: 50%;
  border: 3px solid green;
  padding: 10px;
}

//to just center the text inside an element, use text-align: center;

.center {
  text-align: center;
  border: 3px solid green;
}

//to center an image, set left and right margin to auto and make it into a block element

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 40%;
}