body{
   background-color: black;
   color: aqua;
}
#MainHeader{
   color: yellow;
   display: inline;
}

#mainNav{
   display: inline;
}

#themeButton{
   background-color: blueviolet;
   font-weight: 800;
   font-size: 15px;
   margin-left: 94%;
   margin-right: 1%;
   display: inline;

   border-style: double;
   border-radius: 200ch;
   border-width: 15px;
   border-color: rgb(100, 20, 200);
}