body{

    margin:0;

    background:#F5F7FA;

    font-family:Arial, Helvetica, sans-serif;

}

.app{

    display:flex;

    height:100vh;

}

.sidebar{

    width:240px;

    background:#1F2937;

    color:white;

}

.logo{

    padding:20px;

    text-align:center;

    border-bottom:1px solid rgba(255,255,255,.1);

}

.sidebar ul{

    list-style:none;

    padding:0;

    margin:0;

}

.sidebar li{

    border-bottom:1px solid rgba(255,255,255,.05);

}

.sidebar a{

    display:block;

    color:white;

    text-decoration:none;

    padding:16px 20px;

}

.sidebar a:hover{

    background:#374151;

}

.content{

    flex:1;

    padding:30px;

    overflow:auto;

}