styles.css

/* Master Styles */
h1 {
  color: #369; 
  font-family: Arial, Helvetica, sans-serif;   
  font-size: 250%;
}
h2, h3 { 
  color: #444;
  font-family: Arial, Helvetica, sans-serif;   
  font-weight: lighter;
}
body { 
  margin: 2em; 
}
body, input[text], button { 
  color: #888; 
  font-family: Cambria, Georgia; 
}

/* 
 * See https://github.com/angular/angular.io/blob/master/public/docs/_examples/styles.css
 * for the full set of master styles used by the documentation samples
 */

.spinner {
  width: 40px;
  height: 40px;
  margin: 100px auto;
  background-color: #333;

  border-radius: 100%;
  -webkit-animation: sk-scaleout 1.0s infinite ease-in-out;
  animation: sk-scaleout 1.0s infinite ease-in-out;
}

@-webkit-keyframes sk-scaleout {
  0% {
    -webkit-transform: scale(0)
  }
  100% {
    -webkit-transform: scale(1.0);
    opacity: 0;
  }
}

@keyframes sk-scaleout {
  0% {
    -webkit-transform: scale(0);
    transform: scale(0);
  }
  100% {
    -webkit-transform: scale(1.0);
    transform: scale(1.0);
    opacity: 0;
  }
}