body {  
height: 125vh;  
margin-top: 80px;  
background-size: cover;  
font-family: sans-serif; 
background-color: #000000;
color: #41b6e6;
}


header {  
background-color: grey;  
position: fixed;  
left: 0;  
right: 0;  
top: 5px;  
height: 30px;  
display: flex;  
align-items: center;  
box-shadow: 0 0 30px 0 black;  
}  
header * {  
display: inline;  
}  
header li {  
margin: 20px;  
}  
header li a {  
color: blue;  
text-decoration: none;  
}  
a {
  color: #FFFFFF;
}
a:visited {
  color: #e56db1;
}
a:hover, a:active, a:focus {
  color:#c33;
}