:root {
  --accent-color: #007bff; /* Bootstrap primary color */
}

#preloader:before {
  content: "";
  position: fixed;
  top: calc(50% - 30px);
  left: calc(50% - 30px);
  border: 6px solid #ffffff;
  border-color: var(--accent-color) transparent var(--accent-color) transparent;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: animate-preloader 1.5s linear infinite;
  z-index: 1051; /* Just above Bootstrap modals */
}

@keyframes animate-preloader {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  z-index: 1050;
}