*{
  box-sizing: border-box;
}

html{
  background: #fff;
  margin: 0;
  height: 100%;
  min-height: 100vh;

  color: rgb(47, 59, 70);
  font-family: Helvetica, Arial, sans-serif;
  font-size: 1em;
  font-weight: 300;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body{
  margin: 0;
  height: 100%;
}

.screen{
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.container{
  height: 50%;
  min-height: 120px;
  max-height: 8em;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
}

.hidden{
  display: none;
}

.shown{
  display: block;
}
.spinning{
  -webkit-animation:spin 2s linear infinite;
  -moz-animation:spin 2s linear infinite;
  animation:spin 2s linear infinite;
}
@-moz-keyframes spin {
  100% {
    -moz-transform: rotate(360deg);
  }
}
@-webkit-keyframes spin {
  100% { -webkit-transform: rotate(360deg); }
}
@keyframes spin {
  100% {
    -webkit-transform: rotate(360deg);
    transform:rotate(360deg);
  }
}