@keyframes spin {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}

html,
body {
  position: relative;
  margin: 0;
  padding: 0;
}

html.loaded #loading-message {
  display: none;
}

html.loading-invisible * {
  visibility: hidden;
  opacity: 0;
}

html.loading #loading-message {
  position: fixed;
  display: block;
  top: 0;
  left: 0;
  padding: 50px 0;
  width: 100vw;
  height: 100vh;
  color: #fff;
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  z-index: 10000;
  visibility: visible;
  background-color: rgba(0, 51, 91, 0.8);
}

html.loading #loading-message * {
  visibility: visible;
  background-color: transparent;
}

html.loading #loading-message:before {
  content: '';
  display: block;
  margin: 0 auto;
  height: 35px;
  width: 35px;
  border: 4px solid #0079c8;
  border-radius: 50%;
  border-top-color: transparent;
  border-left-color: transparent;
  margin: 20px auto;
  animation: 0.7s spin linear infinite;
}

html.loading #loading-message:after {
  content: 'Loading...';
  display: block;
  margin: 0 auto;
}