divide the content to centre html code example
Example 1: align in the middle of page html
.centered {
position: fixed;
top: 50%;
left: 50%;
/* bring your own prefixes */
transform: translate(-50%, -50%);
}
Example 2: css position element in the middle of a header
P.blocktext {
margin-left: auto;
margin-right: auto;
width: 200px;/*usually works best with a fixed width*/
}