body {
  background-color:rgb(184, 184, 184);
  text-align:center;
  display: flex;
  flex-direction: column;
  justify-content:center;
  align-items: center;
  margin-top:5%;
  font-family:'Aldrich';

}
a {
  color:black;
  text-decoration: none;
  
}


#screen {
  background-color: rgb(211, 230, 225);
  color:black;
  font-family: 'Ubuntu Mono', monospace;
  font-size:35px;
  padding-top:0px;
  padding-bottom:8px;
  width:60%;
  margin-left: auto;
  margin-right: auto;
  height:30px;
  border: solid black 1px;
  text-align:right;
  padding-right:5px;
}


#keyboard {
  margin:25px 100px 25px 100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr)
}

#zero{
  grid-column: auto / span 2;
}

#calculator {
  background-color:rgb(156, 203, 193);
  border-radius:15px;
  border: solid black 1px;
  box-shadow: 0px 0px 3px 1px black;
}

button {
  margin:5px;
  border: black solid 1px;
  border-radius: 11px;
  font-size:30px;
  background-color:rgb(180, 228, 217);
  box-shadow: 1px 1px 1px 1px grey;
  outline:0;
}

button:active, .pushed{
  transform: translateY(1px);
  background-color:rgb(118, 223, 198);
}