.sobre {
  top: 100px;
  left: 30px;
  opacity: 0.7;
  background-color: grey;
  color: white;
  transform: rotate(10deg);
  border: 1px solid red;
}


section#foot {
    /*background-color: #84ab83;*/
    background-color: #6c757d; /*Secondary color bootstrap*/
}

div#selected {
    background-color: #28a745; 
}