body{
  font-family: Helvetica, serif;
	text-align: center;
}

button {
	border: 0;
	border-radius: 0;
	background-color: transparent;
	font-size: inherit;
	font-family: inherit;
	font-weight: inherit;
	outline: none;
	appearance: none;
	text-align: left;
}


.container {
	max-width: 20em;
	font-size: 175%;
	font-weight: 300;
	line-height: 1.3;
	margin: auto
}

/*
.container > p {
	text-align: center;
}*/

.calculator {
  border-radius: 12px;
  box-shadow: 0 0 40px 0px rgba(0, 0, 0, 0.15);
  margin-left: auto;
  margin-right: auto;
  margin-top: 2em;
  max-width: 17em;
  overflow: hidden;
}

.calculatorDisplay {
  background-color: #222222;
  color: #fff;
  font-size: 1.714285714em;
  padding: 0.5em 0.75em;
  text-align: right;
}

.calculatorKeys {
  background-color: #999;
  display: grid;
  grid-gap: 1px;
  grid-template-columns: repeat(5, 1fr);
}

.calculatorKeys > * {
  background-color: #fff;
  padding: 0.5em 0.5em;
  position: relative;
  text-align: center;
}

.calculatorKeys > *:active::before,
.calculatorKeys > .is-depressed::before {
  background-color: rgba(0, 0, 0, 0.2);
  bottom: 0;
  box-shadow: 0 0 6px 0 rgba(0, 0, 0, 0.5) inset;
  content: "";
  left: 0;
  opacity: 0.3;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 1;
}

.keyOperator, .null {
  background-color: #eee;
}

.keyClear {
  background-color: #042D43;
  color: white;
  /* font-weight: bold;*/
  grid-column: 1 / span 2;
}

.keyEqual {
  /* background-image: linear-gradient(to bottom, #fe886a, #ff7033);*/
  background-color: #F57E2A;
  color: white;
  font-weight: bold;
  grid-column: 3 / span 3;
}