.spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 1;
  height: 40px;
  width: 40px;
  transform: translate(-50%, -50%); }

[class^="ball-"] {
  position: absolute;
  display: block;
  left: 30px;
  width: 12px;
  height: 12px;
  border-radius: 6px;
  transition: all 0.5s;
  animation: circleRotate 4s both infinite;
  transform-origin: 0 250% 0; }

@keyframes circleRotate {
  0% {
    transform: rotate(0deg); }
  100% {
    transform: rotate(1440deg); } }

.ball-1 {
  z-index: -1;
  background-color: #2196F3;
  animation-timing-function: cubic-bezier(0.5, 0.3, 0.9, 0.9); }

.ball-2 {
  z-index: -2;
  background-color: #03A9F4;
  animation-timing-function: cubic-bezier(0.5, 0.6, 0.9, 0.9); }

.ball-3 {
  z-index: -3;
  background-color: #00BCD4;
  animation-timing-function: cubic-bezier(0.5, 0.9, 0.9, 0.9); }

.ball-4 {
  z-index: -4;
  background-color: #009688;
  animation-timing-function: cubic-bezier(0.5, 1.2, 0.9, 0.9); }

.ball-5 {
  z-index: -5;
  background-color: #4CAF50;
  animation-timing-function: cubic-bezier(0.5, 1.5, 0.9, 0.9); }

.ball-6 {
  z-index: -6;
  background-color: #8BC34A;
  animation-timing-function: cubic-bezier(0.5, 1.8, 0.9, 0.9); }

.ball-7 {
  z-index: -7;
  background-color: #CDDC39;
  animation-timing-function: cubic-bezier(0.5, 2.1, 0.9, 0.9); }

.ball-8 {
  z-index: -8;
  background-color: #FFEB3B;
  animation-timing-function: cubic-bezier(0.5, 2.4, 0.9, 0.9); }

.cargando {
  position: fixed;
  width: 85px;
  top: 50%;
  left: 50%;
  margin-top: 43px;
  margin-left: -30px;
  color: #ec8d20;
  font-weight: bold; }

@keyframes blink {
  0% {
    opacity: .2; }
  20% {
    opacity: 1; }
  100% {
    opacity: .2; } }

.cargando {
  position: fixed;
  width: 85px;
  top: 50%;
  left: 50%;
  margin-top: 43px;
  margin-left: -30px; }

.cargando span {
  animation-name: blink;
  animation-duration: 1.4s;
  animation-iteration-count: infinite;
  animation-fill-mode: both; }

.cargando span:nth-child(2) {
  animation-delay: .2s; }

.cargando span:nth-child(3) {
  animation-delay: .4s; }