body {
  margin: 0;
  padding: 0;
  width:100vw;
  height: 100vh;
  background-color: #eee;
}
.content {
  display: flex;
  justify-content: center;
  align-items: center;
  width:100%;
  height:100%;
}
.loader-wrapper {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background-color: #242f3f;
  display:flex;
  justify-content: center;
  align-items: center;
}
.loader {
  display: inline-block;
  width: 60px;
  height: 60px;
  position: relative;
  border: 4px solid #ffffff;
  border-radius: 15%;
  animation: loader 2s infinite;
}
.loader-inner {
  vertical-align: top;
  display: inline-block;
  width: 100%;
  background-color: #1976d2;
  animation: loader-inner 2s infinite ease-in;
}
@keyframes loader {
  0% { transform: rotate(0deg);}
  /* 100% { transform: rotate(360deg);} */
}
@keyframes loader-inner {
  0% { height: 0%;}
  100% { height: 100%;}
}