p.center
{   text-align: center;
    font-weight: bold;
    font-size: 200%;
    color: #009
}

p.abstract
{  margin-left: 5em; 
   margin-right: 2em
}

h1.center, h2.center, h3.center, h4.center, h5.center, h6.center 
{ text-align: center; color: #060 }