/* container */
*::-webkit-scrollbar {
  /* barras verticales */
    width: 5px;
    /* barras horizontales */
    height: 5px;
  }
  /* barra fija*/
*::-webkit-scrollbar-track {
    -webkit-box-shadow: solid 0 0 2px rgba(0,0,0,1);
    background-color: white;
  }
  /* barra movible*/
*::-webkit-scrollbar-thumb {
  background-color: lightgray;
  border-radius: 20px;
}