**** css copy from casual-markdown.css ******/
.markdown code { background:#f0f0f0; color:navy; border-radius:2px; padding:2px; } 
.markdown pre  { background:#f0f0f0; margin:16px; border:1px solid #ddd; padding:8px; } 
.markdown blockquote { background:#f0f0f0; border-left:6px solid grey; padding:8px }
.markdown table { margin:12px; border-collapse: collapse; }
.markdown th    { border:1px solid grey; background:lightgrey; padding:6px; } 
.markdown td    { border:1px solid grey;  padding:6px; }
.markdown t