*.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:left;                  margin-top:5px;
      width:400px;             margin-left:0;                 margin-right:auto; }
#ss { position:static;         text-align:left;                  margin-top:5px;
      width:auto;              margin-left:0;                 margin-right:0;    }
#za { position:absolute;       text-align:left;             top:0; margin-top:155px;
      width:400px;  left:0;    margin-left:0;    right:auto;  margin-right:auto; }
#wa { position:absolute;       text-align:left;             top:0; margin-top:200px;
      width:auto;   left:0;    margin-left:0;    right:auto;  margin-right:auto; }
#sa { position:absolute;       text-align:left;             top:0; margin-top:245px;
      width:auto;   left:0;    margin-left:0;    right:0;     margin-right:0;    }