h1{
text-align:center;
background-color:rgb(184, 178, 178)
text-decoration:none;}

h2{
text-align:center;
background-color:pink;}
#caja1{
    border-radius: 44px 44px 44px 44px;
    -moz-border-radius: 44px 44px 44px 44px;
    -webkit-border-radius: 44px 44px 44px 44px;
    border: 3px solid #000000;}

    #caja2{
        border-radius: 0px 0px 0px 0px;
-moz-border-radius: 0px 0px 0px 0px;
-webkit-border-radius: 0px 0px 0px 0px;
border: 1px solid #000000;}

#caja3{border-radius: 48px 57px 39px 45px;
    -moz-border-radius: 48px 57px 39px 45px;
    -webkit-border-radius: 48px 57px 39px 45px;
    border: 3px solid #000000;}