Answers for "how to center a div horizontally and vertically in css"

center div horizontally and vertically

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

how to center a div vertically and horizontally

.container{	
	margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
  	width: /* Define the width here; */
    height: /* Define the height here; */
}

/*You have to define the width and height! */

css center vertically and horizontally

body {
	display: flex;
	min-height: 100vh;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}
/* to make "align-items: center" work: use "min-height: 100vh;"
100vh = 100% Viewport Height */

center align div vertically and horizontally css

.parent{
	display: flex;
    justify-content: center;
  	align-items: center;
}
/* Child elements will be perfectly centered automatically */