style.css

* {
  margin: 0;
  padding: 0;
}

html {
  font-family: "Roboto", "Helvetica Neue", sans-serif;
}

body {
  background: #445;
  text-align: center;
  color: white;
}
a {
  color: cadetblue;
}
h1,
.btn {
  margin: 1rem;
}

h1 {
  position: absolute;
}

.btn {
  background: cadetblue;
  border-color: cadetblue;
  color: #fff;
  padding: 10px 20px;
  font-size: 1rem;
  border-radius: 4px;
}
#btn-disconnect {
  background: none;
}

.lamp {
  width: 40%;
  min-width: 325px;
  max-width: 430px;
  position: fixed;
  top: 0;
  left: 50%;
  transform: translate(-50%, 0);
}

.on,
.rays {
  display: none;
}

footer {
  position: absolute;
  bottom: 1%;
  left: 1%;
  font-size: 0.8rem;
}

#stats {
  bottom: 15%;
  position: absolute;
  left: 50%;
  transform: translate(-50%, 0);
}

.hidden {
  display: none;
}

#toggle {
  position: absolute;
  opacity: 0;
}

.btn-light {
  display: inline-block;
  font-size: 20px;
  height: 30px;
  width: 60px;
  background: cadetblue;
  border-radius: 1em;
}

.btn-light div {
  height: 30px;
  width: 30px;
  border-radius: 1em;
  background: #fff;
  box-shadow: 0 0.1em 0.3em rgba(0, 0, 0, 0.3);
  transition: all 300ms;
}

.btn-light input:checked + div {
  -webkit-transform: translate3d(100%, 0, 0);
  transform: translate3d(100%, 0, 0);
}

#device-info {
  margin: 1rem;
}

@media only screen and (max-device-width: 600px) {
  body {
    font-size: 40px;
  }
  .lamp {
    width: 80%;
    max-width: 80%;
  }

  #not-connected > button {
    font-size: 3rem;
    border-radius: 10px;
    padding: 20px 40px;
  }
}

@media only screen and (min-width: 900px) {
  #stats {
    bottom: 5%;
  }
}