@import url(https://fonts.googleapis.com/css?family=Open+Sans);
nav {
  max-width: 100%;
  mask-image: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, #ffffff 25%, #ffffff 75%, rgba(255, 255, 255, 0) 100%);
  margin: 0;
  padding: 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%);
  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 a {
  padding-left: 15px;
  padding-right: 15px;
  font-family: "Open Sans";
  color: #CEE7FF;
  font-size: 18px;
  text-decoration: none;
  display: block;
}

nav ul li a:hover {  
    background: -webkit-gradient(radial, 50% 100%, 10, 50% 50%, 90, from(rgba(31,169,244,1)), to(rgba(0,28,78, 1)) );  
    background: -moz-radial-gradient(center 80px 45deg, circle cover, rgba(31,169,244,1) 0%, rgba(0,28,78, 1) 100%);  
}