#calc {
  display: inline-block;
  background-color: #009988;
  background: linear-gradient(to right, #008899, #009988);
  justify-content: space-between;
  padding: 20px;
  width: 304px; /* 20 68 68 68 60 20 */
  height: 272px; /* 20 48 48 48 48 40 20 */
  font-size: 0;
  box-shadow: 1px 3px rgba(0, 0, 0, 0.2);
  border-radius: 30px;
  }

#calc span {
  color: #000000;
  cursor: default;
  display: inline-block;
	float: left; /* fixes empty display */
	position: relative; /* allows 'pushing' down w/ top */
  height: 40px;
  font-size: 12pt;
  line-height: 40px;
  border-radius: 6px;
  margin-bottom: 8px;
  }

#calc span:not(#screen) {
  width: 60px;
  background-color: #ffffff;
  box-shadow: 0px 3px rgba(0, 0, 0, 0.2);
  text-align: center;
  user-select: none;
  }

#calc span:not(#screen):not(.keyOpt) {
  margin-right: 8px;
  }

#screen {
  width: 196px;
  text-align: right;
  padding-right: 10px;
  background-color: #ddffee;
  box-shadow: inset 0px 3px rgba(0, 0, 0, 0.2);
  }

#calc span:not(#screen):active {
  top: 2px;
  box-shadow: 0px 1px rgba(0, 0, 0, 0.2);
  }