html {
  position: relative;
  min-height: 100%;
}

.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 40px;
  margin-bottom: 20px;
}

.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100; /* Behind the navbar */
  padding: 0;
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar .nav-link {
  font-weight: 500;
  color: #333;
}