*{
    margin: 0;
    padding: 0;
}
h1,
h2,
h3,
h4,
h5,
h6,
p,
div,
span,
ul,
li,
a{
    font-size: 15px;
}

a{
    text-decoration: none;
}
ul,li{
    list-style: none;
}

.nav_center_list{
    margin:0 auto 0;
}