.lesson-navigation td .hidden-xs {
  display:none;
}

.lesson-navigation td a {
  background:#5C3072;
  color:white;
  padding:5px 10px;
  border-radius:20px
}

.lesson-navigation td:first-child a:before {
  content:"←"
}

.lesson-navigation td:last-child a:after {
  content:"→"
}

.lesson-navigation td a {
  text-decoration:none;
}

.lesson-navigation td a:hover {
  box-shadow:0 0 8px #5C3072;
}