div.filtro {
    height: 150px;
    display: flex; 
    align-items: center;
    padding-left: 40px;
    margin: 30px 0;
}

div.filtro span {
    cursor:context-menu;
}

div.filtro button {
    border: none;
    margin: 10px auto;
    padding-left: 7px;
    background-color: #f9f9f9;
}
.dropdown {
    position: relative;
    display: inline-block;
  }
  
  .dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    padding: 12px 16px;
    z-index: 1;
  }
  
  .dropdown:hover .dropdown-content {
    display: block;
  }