CSS file 4 html page Python basic security (Part 3)

* { margin-top: 40px;
padding: 0;
list-style: none;
text-align:center
}

body{
 background-color: black;

}


.container{
 padding:20px;
 width:640px ;
 margin:0 auto ;
 border-style: solid ;
 border-width: 1 ;
 border-color:#ffffff;
 border-radius: 10px ;


}