multiselect.css

/* https://raw.githubusercontent.com/sporto/elm-select/6.0.1/src/styles.css */

.elm-select-input-wrapper {
  display: flex;
  position: relative;
  overflow: hidden;
  background-color:white;
  padding: 6px 8px;
}

.elm-select-input {
  flex: 1;
  outline: none;
  border: none;
}

.elm-select-clear {
  cursor: pointer;
  height: 1rem;
  line-height: 1rem;
  margin-top: -0.5rem;
  position: absolute;
  right: 0.25rem;
  top: 50%;
}

.elm-select-multi-input-item-container {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}

.elm-select-multi-input-item {
  display: flex;
  border-width: 1px;
  background-color: #E3E5E8;
  border-radius: 4px;
  margin-right: 4px;
  padding: 2px 8px;
}

.elm-select-multi-input-item-text {
  text-overflow: ellipsis;
}

.elm-select-multi-input-item-remove {
  display: flex;
  align-items: center;
  justify-content: center;
}

.elm-select-multi-item-remove {
  cursor: pointer;
  padding-top: 1px;
  line-height: 0px;
}

/* Menu */

.elm-select-menu {
  position: relative;
}

.elm-select-menu {
  position: absolute;
  z-index: 1;
  background-color: white;
  min-width: 8rem;
  border: 1px solid #e9e9e9;
  max-height:  20rem;
  overflow-y: scroll;
}

.elm-select-menu-item {
  padding: 8px 4px;
}

.elm-select-menu-item-selectable {
  cursor: pointer;
}

.elm-select-menu-item-selectable:hover {
  background-color: #e9e9e9;
}

/* Underline */

.elm-select-input-underline-wrapper {
  position:  relative;
}

.elm-select-input-underline:before,
.elm-select-input-underline:after {
  content: '';
  height: 2px;
  width: 0;
  position: absolute;
  background: #03a9f4;
  -webkit-transition: 0.2s ease all;
  -moz-transition: 0.2s ease all;
  -o-transition: 0.2s ease all;
  transition: 0.2s ease all;
}

.elm-select-input-underline:before {
  left: 50%;
}

.elm-select-input-underline:after {
  right: 50%;
}

.elm-select:focus-within .elm-select-input-underline:before,
.elm-select:focus-within .elm-select-input-underline:after {
  width: 50%;
}