button{
  padding-left: 18px;
  padding-right: 18px;
  padding-top: 10px;
  padding-bottom: 10px;
  margin-right: 5px;  
  margin-bottom: 5px;
  cursor: pointer;
}

.calculator-grid{
  display: grid;
  grid-template-columns: 60px 60px 60px 60px;
  padding-left: 18px;
  padding-right: 18px;
  padding-top: 0;
  padding-bottom: 20px;
}

.calculator{
  border: 2px;
  border-color: burlywood;
  border-style: solid;
  border-radius: 15px;
  width: fit-content;
}

.calculator-title{
  display: block;
  text-align: center;
}

.display{
  background-color: #f0f0f0;
  padding: 15px;
  margin: 10px 18px;
  border-radius: 5px;
  text-align: right;
  font-size: 24px;
  min-height: 30px;
  border: 1px solid #ccc;
}