body {
  background-color: burlywood;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.header {
  position: absolute;
  top: 5px;
  text-align: center;
}

@keyframes rotateLetter {
  from {
    transform: rotateY(90deg);
    opacity: 0;
  }
  to {
    transform: rotateY(0deg);
    opacity: 1;
  }
}

#animated-title span {
  display: inline-block;
  opacity: 0; /* Start hidden */
  animation: rotateLetter 2s ease-in-out forwards;
}


#calculator {
  border: 2px solid rgb(37, 10, 17);
  border-radius: 10px;
  margin-top: 30px;
  width: 200px;
  background-color: rgb(216, 82, 118);
  padding: 5px;
  
}

#display {
  margin: 10px;
  width: 85%;
  font-size: 25px;
  text-align: right;
  background-color: white;
  border: 1px solid black;
  border-radius: 10px;
  padding: 5px;
}


.button-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  background-color: rgb(216, 82, 118);
}

.button {
  width: 45px;
  height: 45px;
  margin: 3px;
  background-color: rgb(216, 201, 205);
  font-size: 20px;
  font-weight: bold;
  border: none;
  border-radius: 10px;
  background: rgb(245, 225, 230);
  cursor: pointer;
  transition: 0.3s ease-in-out;;
}

.button:hover {
  background: rgb(255, 200, 210);
  transform: scale(1.1);
}

.button:active {
  background: rgb(235, 180, 190);
  transform: scale(1);
}