div.firstpart {
     margin: 20ex auto 10ex auto;
     max-width:75em;
   }
   div.secondpart {
   }

   #eins-oder-zwei {
     text-align: center;
     width: 100%;
     display: flex;
     flex-direction:row;
     margin-top: 5ex;
     margin-bottom: 5ex;
   }

   .header {
     margin-top: 3ex;
     color: rgb(198, 91, 78);
     font-weight: 600;
     font-size: 120%;
   }

   #oder-links {
     width: 45%;
   }

   #oder-mitte {
     width: 10%;
     text-align: center;
     padding-top: 1ex;
   }

   #oder-rechts {
     width: 45%;
   }

   #wenn-die-wellen-button-wrapper {
     text-align:center;
     margin-top: 10ex;
   }
   #wenn-die-wellen-button {
     display:inline;
     padding-left: 5em;
     padding-right: 5em;
   }

   @media only screen and (max-width: 65em) {
   }