body {
  background: #c5deea; /* Old browsers */
  background: -moz-linear-gradient(-45deg, #c5deea 0%, #8abbd7 56%, #066dab 56%, #066dab 56%) fixed; /* FF3.6-15 */
  background: -webkit-linear-gradient(-45deg, #c5deea 0%,#8abbd7 56%,#066dab 56%,#066dab 56%) fixed; /* Chrome10-25,Safari5.1-6 */
  background: linear-gradient(135deg, #c5deea 0%,#8abbd7 56%,#066dab 56%,#066dab 56%) fixed; /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#c5deea', endColorstr='#066dab',GradientType=1 ) fixed; /* IE6-9 fallback on horizontal gradient */
}

#mounting {
  width: 320px;
  height: 450px;
  border:  none;
  padding:  10px 10px 3px 15px;
  margin: 0 auto;
  margin-top: 100px;
  overflow: hidden;

  background: #c8dee8; /* Old browsers */
  background: -moz-linear-gradient(-45deg, #c8dee8 11%, #8fbad3 33%, #0f6aa3 75%, #0f6aa3 99%); /* FF3.6-15 */
  background: -webkit-linear-gradient(-45deg, #c8dee8 11%,#8fbad3 33%,#0f6aa3 75%,#0f6aa3 99%); /* Chrome10-25,Safari5.1-6 */
  background: linear-gradient(135deg, #c8dee8 11%,#8fbad3 33%,#0f6aa3 75%,#0f6aa3 99%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#c8dee8', endColorstr='#0f6aa3',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
}

#display {
  width: 245px;
  height: 45px;
  background-color: white;
  margin-left: 20px;
  margin-right: 15px;
  margin-top: 20px;
  margin-bottom: 40px;
  text-align: right;
  font-size: 40px;
  font-family: Courier New;
  padding: 10px;
  overflow: hidden;
}

.boton {
  width: 60px;
  height: 60px;
  margin-bottom: 5px;
  margin-right: 4px;
  background-color: #A9CCE3;
  cursor: pointer;
  text-align: center;
  font-family: Courier New;
  font-size: 30px;
  border: none;
}

.Filas {
  margin-left: 20px;
  margin-right: 15px;
}