.background-container {
  background-size: cover;
  
  height: 100vh; 
  display: flex; 
  justify-content: center;
  align-items: center;
}

.white-rectangle {
  background-color: white;
  width: 300px;
  height: 450px;
  padding: 20px;
  border-radius: 8px; 
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}