.nano {
  position: fixed;
  top: 0px;
  left: 0px;
  background: navy;
  color: white;
  text-align: center;
}

.nano.foot { background: green; top: inherit; bottom: 0px; }
.nano.foot a { color: white; }
.nano td { width: 33%; text-align: center; }

body { margin-top: 16px; }

.sidebar {
  padding-top: 24px;
}

pre code { border-radius: 4px; border: 1px solid #3d3d4f; }