html {
    background: url(pexels-photo-149356.jpeg) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    font-family: 'Raleway', sans-serif;
}

nav {
    max-width: 960px;
    mask-image: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, #ffffff 25%, #ffffff 75%, rgba(255, 255, 255, 0) 100%);
    margin: 0 auto;
    padding: 50px 0;
}

nav ul {
    text-align: center;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.2) 25%, rgba(255, 255, 255, 0.2) 75%, rgba(255, 255, 255, 0) 100%);
    width: 100%;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.1), inset 0 0 1px rgba(255, 255, 255, 0.6);
}

nav ul li {
    display: inline-block;
}

nav ul li a {
    padding: 20px;
    /*font-family: "Roboto";*/
    color: rgba(0, 0, 0, 0.5);
    text-shadow: 1px 1px 1px rgba(255, 255, 255, 0.4);
    font-size: 25px;
    text-decoration: none;
    display: block;
}

nav ul li a:hover {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1), inset 0 0 1px rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.1);
    color: rgba(0, 0, 0, 0.7);
}