.counter {
  display: inline-block;
  min-width: 10px;
  padding: 3px 7px;
  font-size: 12px;
  font-weight: bold;
  color: #fff;
  line-height: 1;
  vertical-align: middle;
  white-space: nowrap;
  text-align: center;
  background-color: #999999;
  border-radius: 10px;
}
.counter:empty {
  display: none;
}
a.counter:hover {
  color: #fff;
  text-decoration: none;
  cursor: pointer;
}
.btn .counter {
  position: relative;
  top: -1px;
}
.btn-mini .counter {
  top: 0;
}
.nav-list > .active > a > .counter,
.nav-pills > .active > a > .counter {
  color: #428bca;
  background-color: #fff;
}
.nav-pills > li > a > .counter {
  margin-left: 3px;
}