Header melayang

styles.css

body{
    margin: 0 auto;
}
.navigasi {
    background-color: #2980b9;
    position: fixed;
    width: 100%;
    height: 70px;
    top: 0;
}
.container {
    margin-top: 70px;
    padding: 15px;
}
nav a {
    color: #fff;
    font-size: 24px;
    text-decoration: none;
}
nav a:hover {
    text-decoration: none;
}
nav ul {
    list-style: none;
}
nav ul li {
    float: left;
    padding: 5px 20px;
}
nav ul li:hover {
    background-color: #FFF;
    border-radius: 5px;
}
nav ul li ul {
    display: none;
    list-style: none;
    margin-left: -20px;
}
nav ul li ul li {
    float: none;
    padding: 5px 20px;
    margin-left: -40px;
}
nav ul li ul li:hover {
    background-color: #DDD;
    border-radius: 0px;
}
nav ul li:hover > ul {
    display: block;
    position: absolute;
    background: #F1F1F1;
}
nav ul li:hover > ul a {
    color: #2980b9;
}
nav ul li:hover > a {
    color: #2980b9;
}