*{
    margin: 0;
    padding: 0;

}
body {
    font-family: 'Open Sans',Arial, sans-serif;
    overflow-x: hidden;
}
h1 {
    color: blue;
    font-family: verdana;
    font-size: 400%;
}
h1 {
    font-family: sans-serif;
    color: black;
    text-shadow: 0px 2px 9px black;
}

nav {
    position: fixed;
    z-index: 1000;
    top: 0;
    bottom: 0;
    width: 200px;
    background-color: #444647;
    transform: translate3d(-200px,0,0);
    transition: transform 0.4s ease;

}
.active-nav nav{
    transform: translate3d(0,0,0);

}

nav ul{
    list-style: none;
    margin-top: 100px;
}

nav ul li a {

    text-decoration: none;
    display: block;
    text-align: center;
    color: #fff;
    padding: 10px 0;

}

.nav-toggle-btn{
    display: block;
    position: absolute;
    left: 200px;
    width: 30px;
    height: 30px;
    background-color: #666;

}



.content{
    padding-top: 300px;
    height: 2000px;
    background-color: #ccf;
    text-align: center;
    transition: transform 0.4s ease;
}


.active-nav.content{
    transform: translate3d(200px,0,0);
}