nav{
    position: fixed;
    top:0;
    left:0;
    width:100%;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    background:linear-gradient(to bottom,white 40%, transparent);
}
nav>ul{
    padding:0;
    width:100%;
    display: flex;
    justify-content: space-around;
}


nav>ul>li{
    list-style: none;
}

nav a{
    color: rgb(0, 0, 0);
    text-decoration: none;
}
nav a:hover{
    color: blue;
    text-decoration: underline;
}
nav a:visited{
    color: rgb(0, 0, 0);
    text-decoration: none;
}

@media screen and (min-width:600px) {
    nav>ul{
    width:50%;
}
}