html,
body,
.block {
  height: 100%;
}

nav ul li a:hover,
nav ul li a.active {
  background-color: rgba(0, 0, 0, .1);
}

/* Class for when element is above threshold */
.pin-top {
  position: relative;
}

/* Class for when element is below threshold */
.pin-bottom {
  position: relative;
}

/* Class for when element is pinned */
.pinned {
  position: fixed !important;
}