html {
  position: relative;
  min-height: 100%;
}
body {
  margin-top: 30px;
  margin-bottom: 50px;
}
.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 50px;
  padding-top: 10px;
  background-color: #f5f5f5;
}
.footer > .container {
  font-size: 90%;
}