body {
  background-color: #FFFFFF;
  color: #000000;
}

.top {
  border: 1px solid #000000;
  background-color: #66FF66;
  margin-bottom: 2ex;
}

.nav {
  background-color: #FFFFFF;
  list-style-type: none;
  margin: 0 0 1px 0;
  padding-left: 0;
  float: right;
  border-left: 1px solid #000000;
}

.nav li {
  border-bottom: 1px solid #000000;
  padding: 1px 2px;
}

.nav a {
  text-decoration: none;
}

h1 {
  margin: 0.5ex 0.5em;
}

h2 {
  background-color: #9999FF;
  border: 1px solid #000000;
  padding: 0.25ex 0.5em;
}

.endtop {
  clear: both;
}

.column {
  float: left;
  width: 48%;
  max-width: 28em;
  min-width: 22em;
  margin-right: 1ex;
}

.block {
  border: 1px solid #000000;
  margin-bottom: 2ex;
}

.block h2 {
  border-top: 0;
  border-left: 0;
  border-right: 0;
  margin: 0;
}

.block p {
  margin: 1ex 0.5em;
}

pre {
  border: 1px dashed #000000;
  background-color: #CCCC99;
  margin-top:    1ex;
  margin-bottom: 2ex;
  margin-left:  0.5em;
  margin-right: 0.5em;
  padding: 2px;
}

.warning {
  background-color: #FFFF00;
  border: 1px solid #000000;
  padding: 0.25ex 0.5em;
}

.paypal {
  float: left;
  clear: left;
  margin-right: 2px;
  border: 0;
}