body {
  background: linear-gradient(rgb(0, 0, 29), 10%, pink);
}

.container {
  max-width: 400px;
  margin: 10vh auto 0 auto;
  box-shadow: 0px 0px 43px 17px rgba(153, 153, 153, 1);
}

#display {
  text-align: right;
  height: 100px;
  line-height: 70px;
  padding: 16px 8px;
  font-size: 25px;
  background-color: rgb(92, 105, 112);
  color: black;
  font-weight: bolder;
  word-wrap: break-word;
}

.buttons {
  display: grid;
  border-bottom: 1px solid #999;
  border-left: 1px solid #999;
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.buttons > div {
  border-top: 1px solid #999;
  border-right: 1px solid #999;
}

.button {
  border: 0.5px solid #999;
  line-height: 100px;
  text-align: center;
  font-size: 25px;
  cursor: pointer;
  color: beige;
  background-color: brown;
}

.button:hover {
  background-color: #323330;
  color: white;
  transition: 0.5s ease-in-out;
}

#equal {
  background-color: #5555ff;
  color: white;
}