calc.css

@import url("https://fonts.googleapis.com/css2?family=Orbitron&display=swap");
.calculator {
  padding: 10px;
  border-radius: 1em;
  height: 380px;
  width: 400px;
  margin: auto;
  margin-top: 130px;
  background-color: #18192b;
  box-shadow: rgba(0, 0, 0, 0.19) 0px 10px 20px, rgba(0, 0, 0, 0.23) 0px 6px 6px;
}
.display-box {
  font-family: "Orbitron", sans-serif;
  background-color: #dcdbe1;
  border: solid black 0.5px;
  color: rgb(134, 123, 123);
  border-radius: 5px;
  width: 100%;
  padding: 14px;
  height: 65%;
}
.button {
  font-family: "Orbitron", sans-serif;
  background-color: #8a8191;
  color: white;
  border: solid black 0.5px;
  width: 100%;
  border-radius: 5px;
  height: 70%;
  padding: 14px;
  outline: none;
}
.button:active {
  background: #e5e5e5;
  -webkit-box-shadow: inset 0px 0px 5px #c1c1c1;
  -moz-box-shadow: inset 0px 0px 5px #c1c1c1;
  box-shadow: inset 0px 0px 5px #c1c1c1;
}