*.gp { position:relative; height:295px; width:600px; border:2px solid black;  }
*.parent  { margin:10px; padding:10px; padding-top:0; border:1px solid black; }
*.example { padding:5px;  border:5px solid black;  background-color:gold;     }

#zs { position:static;       text-align:center;                   margin-top:5px;
      width:400px;           margin-left:auto;           margin-right:auto;  }
#ss { position:static;       text-align:center;                   margin-top:5px;
      width:auto;            margin-left:70px;           margin-right:70px;     }
#za { position:absolute;     text-align:center;            top:0; margin-top:155px;
      width:67%;    left:0;  margin-left:auto; right:0;  margin-right:auto;  }
#wa { position:absolute;     text-align:center;            top:0; margin-top:200px;
      width:auto;   left:0;  margin-left:0;    right:0;  margin-right:0;     }
#sa { position:absolute;     text-align:center;            top:0; margin-top:245px;
      width:auto;   left:0;  margin-left:15%;  right:0;  margin-right:15%;   }