css change text with html code example

Example 1: css change text

IDENTIFIER {
	visibility: hidden;
	position: relative;
}
IDENTIFIER::after {
	visibility: visible;
	position: absolute;
	top: 0;
	left: 0;
	content: "NEW_CONTENT";
}

Example 2: how to resize submit button in html

#search {
    width: 20em;  height: 2em;
}