Answers for "always center content in a div"

css center element on screen

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

how to align contents of div in center

1. Enclose the div that you want to center with a parent element 
(commonly known as a wrapper or container)

2. Set “text-align: center” to parent element.

3. Then set the inside div to “display: inline-block”