Answers for "centering stuff in css"

center a div in css

.container {
  display: flex;
  justify-content: center;
  align-items: center;
}

center with css

.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

how to assign something in center inside a div

IMG.displayed {
    display: block;
    margin-left: auto;
    margin-right: auto }
...
<IMG class="displayed" src="..." alt="...">

how to assign something in center inside a div

P { text-align: center }
H2 { text-align: center }