body {
  background: #e9e9e9;
}

#page {
  width: 600px;
  border: solid 1px #ccc;
  box-shadow: 0 0 5px #999;
  margin: 20px auto;
  font-family: Arial;
  padding: 0;
}

li {
  list-style-type: square;
}

h1 {
  margin: 0 0 5px;
}
h3 {
  color: #333;
}
p {
  text-align: justify;
}
a {
  color: #268BD2;
}

.part_top,
.part_main {
  padding: 20px;
}

.part_top {
  background: #333;
  color: #eee;
}
.part_main {
  background: #fff;
}

pre {
  background: #f6f6f6;
  padding:10px;
  border: dotted 1px #ddd;
  color: #B58900;
}

.element {
  font-weight: bold;
}