* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Franklin Gothic Medium", "Arial Narrow", Arial, sans-serif;
}

body {
  width: 100vw;
  height: 100vh;
  background-color: rgb(44, 44, 44);
  display: flex;
  justify-content: center;
  align-items: center;
}

div.calculator {
  flex-direction: column;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 550px;
  width: 330px;
  border-right: 10px solid rgb(0, 0, 0);
  border-bottom: 10px solid rgb(0, 0, 0);
  box-shadow: -10px -10px 20px rgb(255, 255, 255);
  border-radius: 30px;
}
.calculator > div {
  width: 90%;
}
input {
  width: 100%;
  height: 100px;
  border: none;
  border-radius: 10px;
  margin-bottom: 10px;
  text-align: right;
  font-size: 50px;
}
.button div {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

div > button {
  border-color: white;
  border-width: 4px 0 0 4px;
  box-shadow: -4px -4px 10px rgba(253, 255, 255, 0.5);
  width: 65px;
  height: 65px;
  padding: 20px;
  margin-bottom: 10px;
  border: none;
  font-size: 25px;
  border-radius: 50%;
  color: white;
  background-color: rgb(0, 0, 0);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
}
div > button:hover {
  box-shadow: inset -2px -2px 10px rgba(255, 255, 255, 0.5);
}
div > button:active {
  box-shadow: inset 2px 2px 10px rgba(255, 255, 255, 0.5);
}
.allclear {
  background-color: rgb(255, 38, 0);
  box-shadow: -4px -4px 10px rgb(0, 0, 0);
}
.delete:hover,
.allclear:hover {
  box-shadow: inset -4px -4px 10px rgb(0, 0, 0);
}
.delete:active,
.allclear:active {
  box-shadow: inset 4px 4px 10px rgb(0, 0, 0);
}

.delete {
  background-color: white;
  color: black;
  box-shadow: -4px -4px 10px rgb(0, 0, 0);
}
.operator {
  color: green;
  font-weight: 900;
  font-size: 30px;
}