.loader {
  margin:auto;
  width: 4rem;
  height: 4rem;
  border: 5px solid var(--txtColor);
  border-bottom-color: #FF3D00;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
  }

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

div#loader{
display:flex;
position:fixed;
z-index:9999;
left:0;
top:0;
right:0;
bottom:0;
background-color:transparent;/*rgba(0,0,0,.1);*/
}