#idle-countdown {
  top: 10px;
  left: 10px;
  color: white;
  font-size: 100%;
  padding: 0 10px;
  border-radius: 5px;
  position: absolute;
  background-color: #d97c0e;
}

/* X-Small devices (portrait phones, less than 576px) */
@media (min-width: 575.98px) {

  #idle-countdown {
    font-size: 100%;
  }
}

/* Small devices (landscape phones, less than 768px) */
@media (min-width: 767.98px) {

  #idle-countdown {
    font-size: 120%;
  }
}

/* Medium devices (tablets, less than 992px) */
@media (min-width: 991.98px) {

  #idle-countdown {
    font-size: 140%;
  }
}

/* Large devices (desktops, less than 1200px) */
@media (min-width: 1199.98px) {

  #idle-countdown {
    font-size: 160%;
  }
}

/* X-Large devices (large desktops, less than 1400px) */
@media (min-width: 1399.98px) {

  #idle-countdown {
    font-size: 180%;
  }
}