HTML

CSS

.radio-dropdown {
  width: -webkit-fit-content;
  width: -moz-fit-content;
  width: fit-content;
  cursor: pointer;
  position: relative;
  -webkit-transition: 300ms;
  transition: 300ms;
  color: white;
  overflow: hidden;
}

.selected {
  background-color: #2a2f3b;
  padding: 5px;
  margin-bottom: 3px;
  border-radius: 5px;
  position: relative;
  z-index: 100000;
  font-size: 15px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
}

.arrow {
  position: relative;
  right: 0px;
  height: 10px;
  -webkit-transform: rotate(-90deg);
  -ms-transform: rotate(-90deg);
  transform: rotate(-90deg);
  width: 25px;
  fill: white;
  z-index: 100000;
  -webkit-transition: 300ms;
  transition: 300ms;
}

.options {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  border-radius: 5px;
  padding: 5px;
  background-color: #2a2f3b;
  position: relative;
  top: -100px;
  opacity: 0;
  -webkit-transition: 300ms;
  transition: 300ms;
}

.radio-dropdown:hover > .options {
  opacity: 1;
  top: 0;
}

.radio-dropdown:hover > .selected .arrow {
  -webkit-transform: rotate(0deg);
  -ms-transform: rotate(0deg);
  transform: rotate(0deg);
}

.option {
  border-radius: 5px;
  padding: 5px;
  -webkit-transition: 300ms;
  transition: 300ms;
  background-color: #2a2f3b;
  width: 150px;
  font-size: 15px;
}

.option:hover {
  background-color: #323741;
}

.options input[type="radio"] {
  display: none;
}

.options label {
  display: inline-block;
}
.options label::before {
  content: attr(data-txt);
}

.options input[type="radio"]:checked + label {
  display: none;
}

.options input[type="radio"]#all:checked + label {
  display: none;
}

.radio-dropdown:has(.options input[type="radio"]#all:checked) .selected::before {
  content: attr(data-default);
}

.radio-dropdown:has(.options input[type="radio"]#option-1:checked) .selected::before {
  content: attr(data-one);
}

.radio-dropdown:has(.options input[type="radio"]#option-2:checked) .selected::before {
  content: attr(data-two);
}

.radio-dropdown:has(.options input[type="radio"]#option-3:checked) .selected::before {
  content: attr(data-three);
}

Modern Dropdown With Radio Buttons

Very creative and elegant way of building a dropdown UI component with radio buttons. This dropdown element is best suited for websites and apps with a darker theme.