body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: auto;
  font-family: 'Segoe UI', sans-serif;
}

.calculator {
  background: #5c5959;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  padding: 20px;
  width: 250px;
  margin: 30px 0px;
}

.display {
  height: 60px;
  background: #d1faab;
  text-align: right;
  font-size: 20px;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 8px;
}

.keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}

button {
  height: 50px;
  font-size: 18px;
  border: none;
  cursor: pointer;
  background: #bbb7b7;
}

.equals {
  grid-column: span 2;
}

.clear,
.delete {
  color: deeppink;
}

.button:hover {
  color: white;
  background: aqua;
  opacity: 0.85;
}