*{
    margin: 0;
    padding: 0;
}
body{
    height: 100%;
    width: 100%;
    background: url("../image/background.jpeg");
    background-repeat: repeat;
    background-size: cover;
}
nav{
    width: 100%;
    height: 80px;
    background-color: black;
}
ul{
    margin-left: 750px;
}
ul li{
    list-style: none;
    display: inline-block;
    float: left;
    line-height: 80px;
}
ul li a{
    display: block;
    top: 30px;
    text-decoration: none;
    font-size: 16x;
    font-family: arial;
    color: white;
    padding: 0 20px;
}
ul li a:hover{
    color: aqua;
}
ul li:hover{
    border-bottom: 5px solid;
    border-color: white;
}