a {
  color: white;
}
a {
color: white;
}

 .container {
    background-image: url('https://space-rocket.info/astronomie.jpeg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
width: 100%;
height:100%;
color: white;
            }
            
.content {
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
text-align: center;
min-height: 100vh;
            }
            
.loader {
                border: 5px solid #f3f3f3;
                border-top-color: rgb(243, 243, 243);
                border-top-style: solid;
                border-top-width: 5px;
                -webkit-animation: spin 1s linear infinite;
                animation: spin 1s linear infinite;
                border-top: 5px solid #555;
                border-radius: 50%;
                width: 50px;
                height: 50px;
margin: 30px 0 30px 0;
            }


@keyframes spin {
               0% {
                -webkit-transform: rotate(0deg);
                -ms-transform: rotate(0deg);
                transform: rotate(0deg); 
               }
               100% { 
                -webkit-transform: rotate(360deg);
                -ms-transform: rotate(360deg);
                transform: rotate(360deg); 
                }
            }