html,
body {
  height: 100%;
  padding: 0;
  margin: 0;
}
.page-wrapper {
  min-height: 100%;
  margin-bottom: -2em;
}
.page-wrapper:after {
  content: "";
  display: block;
}
main {
  width: 750px;
  margin: 20px auto 150px;
  text-align: center;
}
#main-title {
  text-transform: uppercase;
}
ul.no-bullet > li {
  list-style: none;
  text-align: left;
}
section {
  margin: 30px 0;
  min-height: 400px;
  background-color: rgba(147,242,235,0.2);
}
footer, .page-wrapper:after {
  height: 2em;
}
footer {
  width: 300px;
  text-align: center;
  margin: 5px auto;
}
nav {
  position: fixed;
}
.mt20 {
  margin-top: 20px;
}