* {
  margin: 0;
  padding: 0;
}

.fundo {
  height: 100vh;
  background-image: linear-gradient(45deg, black, rgb(2, 242, 234));
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

.calculadora {
  background-color: rgba(0, 0, 0, 0.8);
  width: 270px;
  margin: 10% auto;
  text-align: center;
  border-radius: 15px;
  padding: 15px;
  box-shadow: 5px 5px 10px black;
}

.botao {
  width: 50px;
  height: 50px;
  font-size: 25px;
  cursor: pointer;
  background-color: rgb(31, 31, 31);
  border: none;
  color: white;
  margin: 1px;
}

.botao:hover {
  background-color: black;
}

table {
  margin: auto;
}

#res {
  background-color: white;
  width: 201px;
  height: 30px;
  font-size: 25px;
  color: black;
  text-align: right;
  padding: 5px;
  margin: 3px auto;
}