body {
    margin:10px auto;
    background-color:white;
    color:black;
    font-size:16px;
    font-family:Tahoma, Geneva, sans-serif;
    width: -webkit-max-content;
    width: -moz-max-content;
    width: max-content;
}
.center {
    margin:10px auto;
    text-align:center;
}
a:link{color:blue;}
a:visited{color:purple;}
a:active{color:red;}
a:hover {color:red;}