#loader {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1010;
  margin: -75px 0 0 -75px;
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #1db1ff;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}
@keyframes spin {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}
#loader-mask {
  text-align: center;
  position: absolute;
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  z-index: 1009;
  background-color: rgba(242, 246, 252, 0.88);
}
@media (prefers-color-scheme: dark) {
  #loader-mask {
    color: #fff;
    background-color: rgba(0, 0, 0, 0.85);
  }
  #loader-mask a {
    color: #ddd;
  }
  #loader-mask a:hover {
    color: #1db1ff;
  }
}
#loader-source {
  font-size: 1.5rem;
}
#loader-tips-timeout {
  font-size: 1.2rem;
}