.dropdown{
    position: relative;
    display: inline-block;
}

.dropdown [role="listbox"] {
  padding: 0;
  background: white;
  border: 1px solid #d1d1d1;
}

.dropdown [role="option"] {
  display: block;
  padding: 5px 10px;
  position: relative;
  line-height: 1.1;
  cursor: pointer;
}



.selectivo__label {
  border-radius: 0;
  font-size: 14px;
  text-align: left;
  padding:10px;
  padding-right: 25px;
  width: auto;
  position: relative;
  cursor: pointer;
}

.selectivo__label::after {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid #000;
  content: " ";
  position: absolute;
  right: 5px;
  top: 10px;
  margin-top: 1px;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  
}

.selectivo--open  .selectivo__label::after {
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 0;
  border-bottom: 6px solid #000;
  transform: rotate(224deg);
}

.selectivo__dropdown {
  border-top: 0;
  max-height: 300px;
  overflow-y: auto;
  position: absolute;
  margin: 0;
  width: 100%;
  font-size: 14px;
  text-align: left;
  z-index: 1;
}

.dropdown .hidden {
  display: none;
}
.selectivo--open .selectivo__dropdown {
    display: block;
}