.Natur{
    border-radius: 50%;
    width: 200px;
    height: 200px;
}
#Nahrungskette{
    vertical-align: middle;
}
.Pfeil{
    width: 50px;
    padding-bottom: 80px;
}
.hello{
    border-radius: 5%;
}
.Galerie{
    width: 33%;
}

.comic{
    height: 300px;
}
details{

}
summary{
    color:gray
}