.cb-dropdown {
  position: relative;
  font-size: 1rem;
  color: #495057;
  flex: 1 1 auto;
  border: 1px solid #ced4da;
  border-bottom-right-radius: .25rem;
  border-top-right-radius: .25rem;
}
.cb-dropdown .cb-dropdown-list {
  padding: 12px;
  background: #fff;
  position: absolute;
  top: 42px;
  left: 2px;
  right: 2px;
  box-shadow: 0 1px 2px 1px rgba(0, 0, 0, 0.15);
  transform-origin: 50% 0;
  transform: scale(1, 0);
  transition: transform 0.15s ease-in-out 0.15s;
  max-height: 66vh;
  overflow-y: scroll;
}
.cb-dropdown .cb-dropdown-option {
  display: block;
  padding: 4px 12px;
  opacity: 0;
  transition: opacity 0.15s ease-in-out;
  margin-bottom: unset;
}
.cb-dropdown .cb-dropdown-label {
  display: flex;
  align-items: center;
  background: #fff;
  padding: .375rem .75rem;
  line-height: 1;
  cursor: pointer;
  height: calc(2.25rem + 2px);
  margin-bottom: unset;
  border-bottom-right-radius: .25rem;
  border-top-right-radius: .25rem;
}
.cb-dropdown .cb-dropdown-label:before {
  content: "▼";
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
}
.cb-dropdown.on .cb-dropdown-list {
  transform: scale(1, 1);
  transition-delay: 0s;
}
.cb-dropdown.on .cb-dropdown-list .cb-dropdown-option {
  opacity: 1;
  transition-delay: 0.2s;
}
.cb-dropdown.on .cb-dropdown-label:before {
  content: "▲";
}
.cb-dropdown [type=checkbox] {
  position: relative;
  top: 1px;
  margin-right: 4px;
}