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

.dropdown [role="listbox"] {
padding: 0;
background: white;
border: 1px solid #000;
}

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

.dropdown [role="option"]:focus,[role="option"].selectivo__option--selected {
background: #bde4ff;
font-weight: bold;
}

.selectivo__label {
border-radius: 0;
font-size: 14px;
text-align: left;
padding: 5px 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;
}

.selectivo--open  .selectivo__label::after {
border-left: 6px solid transparent;
border-right: 6px solid transparent;
border-top: 0;
border-bottom: 6px solid #000;
}

.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;
}