header{
    top: 0;
    position: fixed;
    background: black;
    color: white;
    z-index: 9999;
    width: 100%;
    height: 30px;
    line-height: 30px;
}
header a::after{
    content: ' - ';
}
header a {
  color:#fff;
  text-decoration:none;
}