body, html {
     margin: 0;
     padding: 0;
     height: 100%;
     overflow: hidden;
 }
 
 .video-container {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     overflow: hidden;
 }
 
 #background-video {
     width: 100%;
     height: 100%;
     object-fit: cover;
 }
 
 .header {
     position: absolute;
     top: 20px;
     right: 20px;
 }
 
 .login-link {
     color: white;
     text-decoration: none;
     font-size: 16px;
     margin-left: 20px;
     background-color: rgba(0, 0, 0, 0.5);
     padding: 10px 20px;
     border-radius: 5px;
 }
 
 .login-link:hover {
     background-color: rgba(0, 0, 0, 0.8);
 }