html, body {  
  margin: 0;  
  padding: 0;  
  height: 100%;  
  background: url('milkyway.jpg') center center / cover no-repeat fixed;  
  font-family: monospace;  
  color: #fff;  
}  
  
.overlay {  
  position: fixed;  
  inset: 0;  
  background: rgba(0, 0, 0, 0.55);  
}  
  
.content {  
  position: absolute;  
  top: 50%;  
  left: 50%;  
  transform: translate(-50%, -50%);  
  text-align: center;  
}  
  
.loader {  
  width: 120px;  
  margin-bottom: 20px;  
}  
  
.text {  
  font-size: 18px;  
  letter-spacing: 1px;  
  opacity: 0.9;  
}