body {
  background-color: #737a7a
}

#canvas{
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.noselect {
  -webkit-touch-callout: none; /* iOS Safari */
  -webkit-user-select: none;   /* Chrome/Safari/Opera */
  -khtml-user-select: none;    /* Konqueror */
  -moz-user-select: none;      /* Firefox */
  -ms-user-select: none;       /* IE/Edge */
  user-select: none;           /* non-prefixed version, currently not supported by any browser */
}

html, body {
  width:  100%;
  height: 100%;
  margin: 0px;
}

.popup {
    position: absolute;
    width: window.innerWidth;
    height: window.innerHeight;
    left: 0; right:0;
    top: 0; bottom:0;
    margin:auto;
    max-width:100%;
    max-height:100%;
    overflow:auto;
    background-color: #000;
    background-color: rgba(0,0,0,0.75);
    display:none;
    justify-content:center;
    align-items:center;
}

#nav {
    position: absolute;
    display:flex;
    top: 20px;
    margin-left:  auto;
    margin-right: auto;
}

.btn {
    background-color: Transparent;
    background-color: rgba(255,255,255,0.3);
    background-repeat:no-repeat;
    border: none;
    cursor:pointer;
    overflow: hidden;
    outline:none;
    color: #FF3333;
}