body {
	font-family: monospace;
}

h1 {
	padding: 6px;
	margin: 6px;
	text-align: left;
}

div {
	text-align: justify;
	height: 100px;
}

.main {
	height: 60%;
}

.half {
	width: 50%;
}

.center {
	margin: 0 auto;
}

.quarter {
	width: 25%;
}

.groove {
	border: groove 3px black;
}

.domain::before {
	content: "\0040"; /* Unicode character for @ symbol */
}

.Absolute-Center {
  margin: auto;
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
}