.contenitore{
  width: 270px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 50px;
  background-color: ;
  border-style: solid;
  border-radius: 40px;
  border-color: white;
  border-width: 10px;
  box-sizing: content-box;
  background: url(cuore.jpg);
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

.display {
  margin-left: 50px;
  margin-right: auto;
  margin-top: 20px;
  margin-bottom: 20px;
}

.pulsante {
  width: 50px;
  height: 50px;
  border-style: solid;
  border-radius: 40px;
  border-color: white;
  color: black;
  margin: 5px;
  background-color: white;
  display: inline-block;
  margin-right: -0.25em;
}

.wrapper {
text-align: center;
display: inline-block;
vertical-align: sub;

}


.tastiera {
  display: flex;
}
.sinistra {
  display: flex;
  width: 75%;
  flex-wrap: wrap;
  flex-direction: row;
  align-content: space-between;

}
.destra {
  width: 25%;
  align-content: space-between;
}


#diviso {
  background-color:#45b8e6 ;
}
#per {
  background-color: cyan;
}
#meno {
  background-color: plum;
}
#piu {
  background-color: palegreen;
}