body {
  background-color: #000;
}

.container {
  color: black;
  text-align: center;
  font-family: sans-serif;
  font-size: 28px;
}

h1 {
  color: #FFF;
}

.calcRow {
  padding: 5px;
}

.calcDisplay {
  width: 215px;
  height: auto;
  background-color: #000;
  color: #fff;
  margin-bottom: 15px;
  font-size: 50px;
  text-align: right;
  border: 0;
}

.calcButton {
  border-radius: 50%;
  font-weight: bold;
  padding: 15px;
  margin: 2px;
  font-size: 16px;
  height: 50px;
  width: 50px;
  border: 0;
  background-color: #393939;
  color: #FFF;
  cursor: pointer;
}

#clearButton {
  background-color: orange;
}