body {background-color: darkgray}
h1 {color:darkslategray; text-align: center;}
p {margin: 0ex;}
h4 {margin-top: 1ex; margin-bottom: 1ex;}
hr {margin-top: 2ex; margin-left: auto; margin-right: auto; margin-bottom: 2ex}
article {border: groove;width: 400px; padding: 1%; margin: auto; background-color: whitesmoke}