body{
  margin: 0;
}

.loader-container {
  display: flex;
  width: 100%;
  height: 100%;
  overflow: hidden;
  min-height: 100vh;
  background: #343A40;
}

.loader {
  position: relative;
  margin: auto;
}

.preloader-circle {
    width: 48px;
    height: 48px;
    border: 6px solid #f3f3f3;
    border-top: 6px solid #004c94;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}