body{
    background:#F2F1F2;
}
.container{
    background:#1A1B20;
}
.left-nav{
    background:#1A1B20;
    /*border: 1px solid red;*/
    overflow-y: auto;
}

.left-nav a{
    color:rgba(255,255,255,.7);
}
.left-nav a.active{
    background: rgba(255, 255, 255, .5) !important;
    color: #fff;
}
.left-nav a:hover{
    background: rgba(255, 255, 255, .3) !important;
    color: #fff;
}