.numberBtn {width:25px;}

.operationBtn {width:25px;}

/* Sticky footer styles
-------------------------------------------------- */
html {
  position: relative;
  min-height: 100%;
}
body {
  /* Margin bottom by footer height */
  margin-bottom: 60px;
}

.btn {margin:3px; width:35px; height:35px;}

#footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  /* Set the fixed height of the footer here */
  height: 60px;
  background-color: #f5f5f5;
}


/* Custom page CSS
-------------------------------------------------- */
/* Not required for template or sticky footer method. */

.container {
  width: auto;
  max-width: 680px;
  padding: 0 15px;
}
.container .text-muted {
  margin: 20px 0;
}

#display, #history {
    text-align:right;
}

#memory{
    text-align:center;
    border:0px;
}

#displayArea, #historyArea{
    margin: 10px 0px;
}

.menu  {
  font-family: Georgia, "Times New Roman", Times, serif;
}