.layout {
  width: 100%;
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  background-color: darkgray;
  margin-top: 8px;
  border: 2px solid black;
  border-radius: 2%;
  padding: 2%;
}

.span-two {
  grid-column: span 2;
}

.button {
  background-color: whitesmoke;
  border-radius: 3%;
  height: 3rem;
  line-height: 3rem;
  text-align: center;
}

.button:hover {
  background-color: azure;
}

.pressed {
  background-color: rgb(195, 213, 245);
}

body {
  background-color: whitesmoke;
}

.calculator {
  background-color: white;
  padding: 5%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

main {
  margin: 10% auto;
  max-width: 650px;
}

#calculator-screen {
  width: 100%;
  height: 50px;
  font-size: 1.5rem;
  text-align: end;
  margin: 8px auto;
}