body {


  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: black;
  margin: 0%;
}
.calculator {
  background-color: #000;
  padding: 20px;
  border-radius: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  text-align: center;
  width: 320px;
}
.display {
  background-color: #222;
  color: #fffd;
  font-size: 20px;
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 20px;
  min-height: 50px;
  text-align: right;
}
.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.button {
  border: none;
  border-radius: 50px;
  padding: 20px;
  font-size: 1.5rem;
  cursor: pointer;
}
.button.dark-gray {
  background-color: #333;
  color: #fffd;
}

.button.orange {
  background-color: #f39c12;
  color: #fffd;
}

.button.ligth-gray {
  background-color: #d3d3d3;
  color: #000;
}

.button.wide {
  grid-column: span 2;
  border-radius: 50px;
}