html {
  background: url("../../assets/img/switch-838385_bk.png") no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.logo {
  width: 512px;
}

@media (min-width: 300px) {
  .logo {
    width: 300px;
  }
}

@media (min-width: 350px) {
  .logo {
    width: 300px;
  }
}

@media (min-width: 400px) {
  .logo {
    width: 350px;
  }
}

@media (min-width: 450px) {
  .logo {
    width: 400px;
  }
}