ble-server/public/css/main.css

html, body{
  height: 100%;
  width: 100%;
  background-color: #eee;
}

.t-right {
  text-align: right;
}

#qr img {
  margin: 0 auto;
}

.clearfix:before,
.clearfix:after {
  content: "";
  display: table;
}
.clearfix:after {
  clear: both;
}
.clearfix {
  *zoom: 1; /*For IE 6&7 only*/
}