body {
  background-color: #e4e9fd;
  background-image: -webkit-linear-gradient(65deg, #00ffcc 50%, #666699 50%);
  min-height: 1000px;
}
h1 {
  color: white;
  float: right;
}
body {
  text-align: center;
}

footer {
  text-align: center;
  font-size: 20px;
  position: relative;
  width: 100%;
  height: 2.5rem;
}

.display {
  width: 320px;
  height: 150px;
  background-color: Black;
  position: relative;
  margin: auto;
  margin-bottom: -2px;
  margin-top: 20%;
  border-radius: 2%;
}
.btn {
  width: 320px;
  height: 360px;
  margin: auto;
  border-radius: 2%;
  align-items: center;
}
.btn1 {
  height: 80px;
  width: 80px;
}
.btn1 :hover {
  background-color: #50394c;
}