.loader {
  position: relative;
  z-index: 0;
  display: block;
  margin: auto;
  height: 100px;
  width: 100px;
  /* renamed these */
  -webkit-animation: webkit-rotation .7s infinite linear; 
  -moz-animation: moz-rotation .7s infinite linear;
  -o-animation: o-rotation .7s infinite linear;
  animation: rotation .7s infinite linear;
  border-left: 8px solid rgba(0, 0, 0, .20);
  border-right: 8px solid rgba(0, 0, 0, .20);
  border-bottom: 8px solid rgba(0, 0, 0, .20);
  border-top: 8px solid rgba(33, 128, 192, 1);
  border-radius: 100%;
}

@keyframes rotation {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(359deg);
  }
}
/* and renamed these accordingly */
@-webkit-keyframes webkit-rotation {
  from {
    -webkit-transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(359deg);
  }
}
@-moz-keyframes moz-rotation {
  from {
    -moz-transform: rotate(0deg);
  }
  to {
    -moz-transform: rotate(359deg);
  }
}
@-o-keyframes o-rotation {
  from {
    -o-transform: rotate(0deg);
  }
  to {
    -o-transform: rotate(359deg);
  }
}
.waitCss {
  padding: 15px;
  width: 90%;
  margin: auto;
  text-align: center;
}