body {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  background-color: rgba(0, 0, 0, 0.644);
  text-align: center;
}
.h1 {
  font-size: 40px;
  padding: 10px;
  color: whitesmoke;
}
.calculator {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.calc {
  padding: 20px;
  margin: auto;
  height: 500px;
  border-radius: 20px;
  background: lightgrey;
  box-shadow: rgba(50, 50, 93, 0.25) 0px 30px 50px -12px inset,
    rgba(0, 0, 0, 0.3) 0px 18px 26px -18px inset;
}
.display-box {
  font-family: "orbitron", sans-serif;
  background-color: white;
  color: black;
  border-radius: 5px;
  width: 97%;
  height: 55%;
  outline: none;
  font-size: 26px;
  border: none;
}
.button {
  font-family: "orbitron", sans-serif;
  background-color: rgb(36, 35, 35);
  color: white;
  width: 80px;
  border-radius: 5px;
  height: 60%;
  outline: none;
  border: none;
  font-size: 30px;
  font-weight: bold;
  cursor: pointer;
}