ar-design/dist/assets/css/components/form/select/options.css

AR Design is a (react | nextjs) ui library.

.ar-select-options {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  top: 0;
  background-color: var(--white);
  border: solid 1px var(--gray-200);
  border-radius: var(--border-radius-sm);
  box-shadow: 0 0 15px -2.5px rgba(var(--black-rgb), 0.1);
  overflow: hidden;
  z-index: 1052;
  transition: visibility 250ms, opacity 250ms, transform 250ms ease-in-out;
}
.ar-select-options.top {
  box-shadow: 0 5px 15px -2.5px rgba(var(--black-rgb), 0.1);
}
.ar-select-options.bottom {
  box-shadow: 0 -5px 15px -2.5px rgba(var(--black-rgb), 0.1);
}

.ar-select-options > .search-field {
  padding: 0.5rem;
  border-bottom: solid 1px var(--gray-200);
}

.ar-select-options > ul {
  width: 100%;
  max-height: calc(var(--input-height) * 5);
  overflow-x: hidden;
  overflow-y: auto;
}
.ar-select-options > ul > li {
  display: flex;
  align-items: center;
  gap: 0 0.5rem;
  padding: 0 1rem;
  height: var(--input-height);
  cursor: pointer;
}
.ar-select-options > ul > li:hover {
  background-color: var(--gray-200);
}
.ar-select-options > ul > li.selectedItem {
  /* background-color: rgba(var(--success-rgb), 0.1); */
}
.ar-select-options > ul > li.navigate-with-arrow-keys {
  background-color: var(--gray-100);
}

.ar-select-options > .no-options-field,
.ar-select-options > ul > li > .no-options-field {
  width: 100%;
  padding: 0.5rem 1rem;
}
.ar-select-options > ul > li > .no-options-field {
  padding: 0 !important;
}
.ar-select-options > .no-options-field > .text,
.ar-select-options > ul > li > .no-options-field > .text {
  color: var(--gray-500);
}
.ar-select-options > .no-options-field > .add-item,
.ar-select-options > ul > li > .no-options-field > .add-item {
  display: flex;
  align-items: center;
  position: relative;
  background-color: rgba(var(--primary-rgb), 0.05);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
  border-left: solid 2px var(--primary);
  color: var(--primary);
  cursor: pointer;
}
.ar-select-options > .no-options-field > .add-item::before,
.ar-select-options > ul > li > .no-options-field > .add-item::before {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  content: "";
  border: solid 5px transparent;
  border-left-color: var(--primary);
}
.ar-select-options > .no-options-field > .add-item > .plus,
.ar-select-options > ul > li > .no-options-field > .add-item > .plus {
  display: inline-block;
  position: relative;
  background-color: var(--primary);
  min-width: 1rem;
  height: 1rem;
  margin-right: 0.25rem;
  border-radius: var(--border-radius-pill);
  color: var(--white);
  text-align: center;
  line-height: 1rem;
}

/* .ar-select-options:is(.opened) {
  visibility: visible;
  opacity: 1;
  transform: scaleY(1);
}
.ar-select-options:is(.closed) {
  visibility: hidden;
  opacity: 0;
  transform: scaleY(0.8);
  height: 0;
}

.ar-select-options.top:is(.opened, .closed),
.ar-select-options.top:is(.opened, .closed) {
  transform-origin: top;
}
.ar-select-options.bottom:is(.opened, .closed),
.ar-select-options.bottom:is(.opened, .closed) {
  transform-origin: bottom;
} */