.loader-wrapper {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background-color: rgba(36, 47, 63, 0.75);
  display: flex;
  justify-content: center;
  align-items: center;
}
.loader {
  display: inline-block;
  width: 30px;
  height: 30px;
  position: relative;
  border: 4px solid #fff;
  animation: loader 2s infinite ease;
}
.loader-inner {
  vertical-align: top;
  display: inline-block;
  width: 100%;
  background-color: #fff;
  animation: loader-inner 2s infinite ease-in;
}
.loader-text {
    position: relative; 
    margin: 10px; 
    color: #fff;
    font-size: 24px;
    font-weight: bold;
  }

@keyframes loader {
  0% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(180deg);
  }
  50% {
    transform: rotate(180deg);
  }
  75% {
    transform: rotate(360deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes loader-inner {
  0% {
    height: 0%;
  }
  25% {
    height: 0%;
  }
  50% {
    height: 100%;
  }
  75% {
    height: 100%;
  }
  100% {
    height: 0%;
  }
}