a.btn-default {
  display: inline-block;
  background: transparent;
  color: transparent;
  border: none;
  border-left: 18px solid transparent;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
  font-size: 100%;
  line-height: 1.9;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  padding: 0.5em 1em;
  transition: all 0.2s;
}
a.btn-default:visited {
  background: transparent;
  color: transparent;
  border: none;
  border-left: 18px solid transparent;
  text-decoration: none;
}
a.btn-default:active {
  background: transparent;
  color: transparent;
  border: none;
  border-left: 24px solid transparent;
  text-decoration: none;
}
a.btn-default:hover {
  background: transparent;
  color: transparent;
  border: none;
  border-left: 24px solid transparent;
  text-decoration: none;
  opacity: 1;
}