a.css

/* colors & text styles */
body {
  background:url('http://upload.wikimedia.org/wikipedia/en/c/c6/Newman_Library_2.jpg') #300 no-repeat center top;
}

div.blogpage {
  background: #fff;
}

.byline {
  font-size: smaller;
}

/* margins */
div.blogpage {
  padding: 1em;
}

div.bottom {
  margin-top: 2em;
  font-size: small;
}

div.login {
  margin-top: 2em;
}

/* positioning */
div.blogpage {
  position: absolute;
  width: 800px;
  left: 50%;
  margin-left: -400px;
}

div.top { 
  position: relative; 
  height: 5em;
  border-bottom: 1px dotted #aaa;
}

div.topleft {
  position: absolute;
  left: 0;
  top: 0;
}

div.topright {
  position: absolute;
  right: 0;
  top: 0;
}