.value {
    border: 1px #AAA solid;
    display: inline-block;
    font-size: 1.5rem;
    margin: 10px;
    padding: 10px 15px;
    background-color: #fff;
    transition: background-color 500ms;
    min-width: 60px;
    text-align: center;
  }
  
  .text {
    color: #555;
    transition: color 500ms;
  }
  
  .cross {
    color: #E33;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1.5rem;
    padding-left: 15px;
  }
  
  .value.selected {
    border: 1px #00E661 solid;
    background-color: #00E661;
  }
  
  .value.selected .text {
    color: #fff;
  }
  
  @media (max-width: 767px) {
    .value {
      font-size: 1.1rem;
      padding: 8px 10px;
      margin: 7px;
    }
  }
  
.drop {
  position: relative;
  animation-name: drop;
  animation-duration: 0.3s;
  animation-iteration-count: 1;
}

@keyframes drop {
  0% {
    top: 0;
  }
  50% {
    top: 20px;
  }
  100% {
    top: 0;
  }
}