.spinner-container {
  position: absolute;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  display: flex;
}

.spinner {
  margin: 100px auto;
  width: 40px;
  height: 40px;
  position: relative;
  text-align: center;
  
  -webkit-animation: sk-rotate 2.0s infinite linear;
  animation: sk-rotate 2.0s infinite linear;
}

.dot1, .dot2 {
  width: 60%;
  height: 60%;
  display: inline-block;
  position: absolute;
  top: 0;
  background-color: #333;
  border-radius: 100%;
  
  -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
  animation: sk-bounce 2.0s infinite ease-in-out;
}

.dot2 {
  top: auto;
  bottom: 0;
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

@-webkit-keyframes sk-rotate { 100% { -webkit-transform: rotate(360deg) }}
@keyframes sk-rotate { 100% { transform: rotate(360deg); -webkit-transform: rotate(360deg) }}

@-webkit-keyframes sk-bounce {
  0%, 100% { -webkit-transform: scale(0.0) }
  50% { -webkit-transform: scale(1.0) }
}

@keyframes sk-bounce {
  0%, 100% { 
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  } 50% { 
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}

[data-bg] {
  -webkit-transition: all 640ms cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
  -moz-transition: all 640ms cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
  -o-transition: all 640ms cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
  transition: all 640ms cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
}

[data-bg]:not(.loaded) {
  opacity: 0;
}

[data-bg].loaded {
  opacity: 1;
}