body{
    margin:0;
    background-color:white;
}
.nav{
    width:100%;
    background-color:white;
    overflow:auto;
}
ul{
    padding:0;
    margin:0 0 0 300px;
    list-style: none;

}
li{
    float:left;
}
.logo img{
    position: absolute;
    margin-top:10px;
    margin-left:10px;

}
nav a{
    width:130px;
    display:block;
    padding:30px 0px 0px 0px;

    color:gray;
    text-decoration: none;
    font-family: sans-serif;
    font-size: 18px;
    text-align: center;


}
nav li{
    position:relative;
}

.active .line:after{
    width:120px;
    height:3px;

    background-color:orange;
}