.container {
  width: 45vw;
  height: 60vh;
  margin: auto;
  text-align: center;
  background-color: #1452f5;
  color: white;
  border-radius: 10px;
  box-shadow: 5px 5px 10px gray; 
}

#output {
	padding-top: 20%;
  font-size: 30px;
  font-family: arial;
}

#demo {
  width: 50%;
	border: none;
	background-color: transparent;
  border-bottom: 3px solid white;
  color: white;
  caret-color: white;
}

input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}

*:focus {
  outline: none;
}

button { 
	background-color: #093FCD;
  border: none;
  padding: 8px;
  width: 100px;
  border-radius: 20px;
  color: white;
}