input[type="range"] {
    display: block;
    -webkit-appearance: none;
    background-color: #bdc3c7;
    width: 100%;
    height: 5px;
    border-radius: 5px;
    margin: 0 auto;
    outline: 0;
  }
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    background-color: #e74c3c;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid white;
    cursor: pointer;
    transition: .3s ease-in-out;
  }​
    input[type="range"]::-webkit-slider-thumb:hover {
      background-color: white;
      border: 2px solid #e74c3c;
    }
    input[type="range"]::-webkit-slider-thumb:active {
      transform: scale(1.3);
    }