.loader {
  margin: auto;
  border: 6px solid #f3f3f3;
  border-radius: 50%;
  border-top-color: #007bc3;
  width: 20px;
  height: 20px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

.loader.lg {
  width: 100px;
  height: 100px;
  border-width: 10px;
}

.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #ddddddad;
  z-index: 2;
}

.loading .loader {
  border: 16px solid transparent;
  border-top: 16px solid #007bc3;
  width: 100px;
  height: 100px;
}

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