vue-material/src/components/mdSelect/mdSelect.scss

@import '../../core/stylesheets/variables.scss';

.md-select {
  width: 100%;
  min-width: 128px;
  height: 32px;
  position: relative;

  &:focus {
    outline: none;
  }

  &:after {
    margin-top: 2px;
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%) scaleY(0.45) scaleX(0.85);
    transition: $swift-linear;
    color: rgba(#000, .54);
    content: "\25BC";
  }

  &.md-active {
    .md-select-menu {
      top: -8px;
      pointer-events: auto;
      opacity: 1;
      transform: translateY(-8px) scale3D(1, 1, 1);
      transform-origin: center top;
      transition: $swift-ease-out;
      transition-duration: .25s;
      transition-property: opacity, transform, top;

      > * {
        opacity: 1;
        transition: $swift-ease-in;
        transition-duration: .15s;
        transition-delay: .1s;
      }
    }
  }

  select {
    position: absolute;
    left: -999em;
  }

  .md-select-value {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    z-index: 2;
    font-size: 16px;
    line-height: 1.2em;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .md-select-menu {
    min-width: 156px;
    max-width: 100%;
    min-height: 48px;
    max-height: 256px;
    display: flex;
    flex-flow: column;
    justify-content: stretch;
    align-content: stretch;
    pointer-events: none;
    position: absolute;
    top: -16px;
    left: -16px;
    z-index: 7;
    background-color: #fff;
    border-radius: 2px;
    box-shadow: $material-shadow-2dp;
    opacity: 0;
    transform: scale3D(.85, .7, 1);
    transition: opacity .25s $swift-ease-in-timing-function,
                top .25s $swift-ease-in-timing-function,
                transform 0s .25s $swift-ease-in-timing-function;

    > * {
      opacity: 0;
      transition: $swift-ease-out;
      transition-duration: .25s;
    }
  }

  .md-select-menu-container {
    margin: 0;
    padding: 8px 0;
    display: flex;
    flex-flow: column;
    justify-content: stretch;
    align-content: stretch;
    overflow-x: hidden;
    overflow-y: auto;
  }
}

.md-option {
  height: 48px;
  min-height: 48px;
  padding: 0 16px;
  display: flex;
  flex-flow: column;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: $swift-ease-out;
  font-size: 16px;
  line-height: 1.2em;
  text-overflow: ellipsis;
  white-space: nowrap;

  &:hover {
    background-color: rgba(#000, .12);
  }
}