body{
margin:0;
display:flex;
font-family:sans-serif;
}

.sidebar{
width:280px;
min-height:100vh;
background:#f3f3f3;
padding:20px;
}

.sidebar a{
display:block;
text-decoration:none;
color:#222;
padding:15px;
}

.sidebar summary{
padding:15px;
cursor:pointer;
}

.sidebar details a{
padding-left:35px;
}

.content{
flex:1;
padding:40px;
}