h1 { background: #efefef;
     color: #3f3f3f}
h3 { background: #efefef;
     color: #3f3f3f;
     border-left: silver groove 16px;
     border-bottom:silver ridge 1px}
h4{  background:#cff;
    color: #00f;
    margin: 1em 2em;
    border-left:#0000ff solid 4px;
    border-bottom:#0000ff ridge 1px}
p {margin: 1em 2em;
    line-height: 1.4 }
pre { background: silver;
      color: black;
      margin: 1em 2em;
      line-height: 1.4 }
ul {list-style-position: outside;
     line-height:1.3}