.Herzen{
    height: 32px;
     width: 32px;
      border: 0;
    }
    .Herzen img{
        display: none;
    }
    
.Herzen:hover img{ display: block;}
.HalbHerz{display: none;}
#Herzliste{
    list-style-type: none;
    padding: 0px;
    display: flow-root;
}
#Herzliste li{
    float: left;
}