iframe {
  display: block;
  margin: auto;
  position: relative;
  z-index: 10;
}
body {
  background: #CCC;
}
.container {
  background: #FFF;
  box-shadow: 0 0 10px rgba(0, 0, 0, .25);
}
.template {
  margin: 20px 0;
}
.navbar {
  margin-bottom: 0;
}
.row {
  margin: 20px 0;
  position: relative;
}
.col-lg-4,
.col-lg-6,
.col-lg-8,
.col-lg-10,
.col-lg-12 {
  float: none;
  margin: auto;
}
.loader {
  border: 10px solid rgba(0, 0, 0, .1); 
  border-top: 10px solid #0d5278;
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 1.5s linear infinite;
  display: block;
  margin: 20px auto;
  position: absolute;
  top: 50px;
  left: 50%;
  margin-left: -60px;
  z-index: 1;
}

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