html,
body {
  height: 100%;
}

body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: start;
  justify-content: center;
  padding-top: 2em;
  padding-bottom: 3em;
  background: #f5f5f5;
}

.firebaseui-trailing-container {
  max-width: 360px;
  margin: 0.5em auto;
}

/* Loading spinner */

.loader {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}
.loader div {
  position: absolute;
  top: 33px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #34c759;
  animation-timing-function: cubic-bezier(0, 1, 1, 0);
}
.loader div:nth-child(1) {
  left: 8px;
  animation: loader1 0.6s infinite;
}
.loader div:nth-child(2) {
  left: 8px;
  animation: loader2 0.6s infinite;
}
.loader div:nth-child(3) {
  left: 32px;
  animation: loader2 0.6s infinite;
}
.loader div:nth-child(4) {
  left: 56px;
  animation: loader3 0.6s infinite;
}
@keyframes loader1 {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes loader3 {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(0);
  }
}
@keyframes loader2 {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(24px, 0);
  }
}

/* Dark mode */

@media (prefers-color-scheme: dark) {
  body {
    background: #000000;
  }

  .loader div {
    background: #30d158;
  }
}