body { color: black;
       background-color: white; }

h1,h2 {padding: .5em; background-color: gray ; color: white ; text-align: left}

h1 {font:x-large Trebuchet MS,Verdana,sans-serif;}
h2 {font:large Trebuchet MS,Verdana,sans-serif;}

a:visited {color: darkblue}
a:link {color: blue}
a:active {color: darkred}

p.abstract {margin-left: 8ex; margin-right: 8ex; }

span.papertitle {font-weight: bold;}
span.journaltitle {font-style: italic;}

.center { text-align: center; }

.main {
          width: 40em; 
          text-align: left;
          margin-left: auto; margin-right: auto;
       }

.indented { text-indent: -5ex; margin-left: 5ex; padding: 1ex; }


.grey { background-color: lightgrey; }

.title { font-size: large; font-weight: bold; text-align: center; }