.loading {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: #3d464d;
  opacity: 0.3;
}
.loading img {
  width: 40px;
  height: 40px;
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 50%;
  top: 50%;
  margin: -20px;
}

input{outline:none}