body {
  background: #E3E3E3 linear-gradient(0deg, #E3E3E3, #FFFFFF) no-repeat;
  margin: 0;
  padding: 0;
  text-align: center;
}

.col-fullscreen {
  display: none;
  width: 60%;
  float: left;
}

.col-fullscreen canvas {
  margin-top: 7%;
  width: 100%;
  image-rendering: -moz-crisp-edges;
  image-rendering: pixelated;
  -ms-interpolation-mode: nearest-neighbor;
}

body.fullscreen .col-fullscreen {
  display: block;
}

body.fullscreen .col-calculator {
  width: 35%;
  float: left;
}

a.action {
  display: block;
  width: 4%;
  padding: 1.5% 3%;
  border: 1px solid black;
  border-radius: 100px;
  cursor: pointer;
  opacity: 0.65;
}

a.action:hover {
  opacity: 1.0;
  background-color: rgba(0,0,0,0.125);
}

a.action svg {
  display: block;
}

.calculator {
  margin: 0 auto;
  position: relative;
  display: inline-block;
  text-align: left; }
  .calculator > img {
    /* Rely on the img content to set the dimensions */
    max-height: 100vh;
    max-width: 100%;
    display: block; }
  .calculator .screen {
    position: absolute;
    top: 10.3%;
    left: 24.25%;
    width: 52.1%;
    height: 23.2%;
    border: 0 none; }
  .calculator .actions {
    position: absolute;
    bottom: 2%;
    text-align: center;
    left: 0;
    right: 0;
    margin-left: 20px; /* Center the buttons - compensate the 10px margin below */
  }
  .calculator .actions a {
    display: inline-block;
      margin-right: 10px;
  }
  .calculator .keyboard {
    position: absolute;
    top: 37%;
    left: 19%;
    width: 63%;
    bottom: 14%; }
    .calculator .keyboard span {
      cursor: pointer;
      border-radius: 40%;
      display: block;
      float: left; }
    .calculator .keyboard span:hover {
      background-color: rgba(0, 0, 0, 0.1); }
    .calculator .keyboard span:active {
      background-color: rgba(0, 0, 0, 0.2); }
    .calculator .keyboard .nav {
      position: absolute;
      top: 0;
      height: 27%;
      width: 100%; }
      .calculator .keyboard .nav span {
        position: absolute; }
      .calculator .keyboard .nav .left {
        top: 36%;
        left: 3%;
        width: 15%;
        height: 28%; }
      .calculator .keyboard .nav .right {
        top: 36%;
        left: 17%;
        width: 15%;
        height: 28%; }
      .calculator .keyboard .nav .top {
        top: 7%;
        left: 12.5%;
        width: 10%;
        height: 40%; }
      .calculator .keyboard .nav .bottom {
        top: 53%;
        left: 12.5%;
        width: 10%;
        height: 40%; }
      .calculator .keyboard .nav .home {
        top: 12%;
        left: 42%;
        width: 16%;
        height: 33%; }
      .calculator .keyboard .nav .power {
        top: 54%;
        left: 42%;
        width: 16%;
        height: 33%; }
      .calculator .keyboard .nav .ok {
        top: 30%;
        left: 68%;
        width: 13%;
        height: 38%; }
      .calculator .keyboard .nav .back {
        top: 30%;
        left: 84%;
        width: 13%;
        height: 38%; }
    .calculator .keyboard .functions {
      position: absolute;
      top: 26.75%;
      left: 1%;
      width: 98%; }
      .calculator .keyboard .functions span {
        margin: 1.7% 1%;
        width: 14.65%;
        height: 0;
        padding-top: 10%; }
    .calculator .keyboard .digits {
      position: absolute;
      top: 57%;
      left: 0.5%;
      width: 98%; }
      .calculator .keyboard .digits span {
        margin: 1.8% 2%;
        width: 16%;
        height: 0;
        padding-top: 11%; }