body {
        background-image: url(http://wallpapercave.com/wp/FiA953L.jpg);
        background-size: 100%;
        margin: 0;
  
    
   
    div {
        width: 800px;
        margin: 5em auto;
        padding: 50px;
        background-color: #fff;
        border-radius: 1em;
    }
    
    ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #3b3b3b;
    overflow: hidden;
    position: fixed;
    top: 0;
    width: 100%;
}

 p {
    margin-top: 70px;
    margin-bottom: 70px;
    margin-right: 90px;
    margin-left: 80px;
    font-size: 30px;
}

h1 {
  font-size: 50px;
}
  

 li {
    float: left;
}

a {
    display: block;
    padding: 8px;
    color: #ffffff;
    background-color: #3b3b3b;
    text-decoration: none; 
    font-size: 25px;
}

li a:hover {
    background-color: #111;
    height:100%;
   width:100%;
    background-repeat:no-repeat;
}

body {
    background-image: url("http://www.webdesignburn.com/wp-content/uploads/2015/04/Grey-Texture-Background-and-Wallpaper-12.jpg");
}

div { 
  color: #ffffff;
  font-size: 30px;
  padding: 50px;
  font-size: 30px;
  background-color: #000000;
  
}