Could someone please look it and give me feedback. I'm new in this

Document

This is the css section.
body{
margin: 0px;
}
ul{
border: 2px solid black;
list-style: none;
display: flex;
flex-direction: column;
align-items: center;
background: black;
margin-top: 0;
}
a:any-link{
color: white;
text-decoration: none;
}

a:hover, a:focus{
color: dodgerblue;
}
li{
margin: 8px;
color: aliceblue;
}

@media screen and (min-width: 768px) {
ul{
flex-direction: row;
justify-content: flex-end;
}
}

Alfred,
when you want to show a code, always wrap your code using </> icon that you will find above the text editor. Also helpful to provide with the HTML code too.