body{
background:#f4f6f9;
}
.sidebar{
position:fixed;
width:240px;
height:100vh;
background:#111827;
padding:25px;
color:white;
}
.sidebar a{
display:block;
color:white;
text-decoration:none;
margin:15px 0;
}
.content{
margin-left:260px;
padding:30px;
}
.card-box{
background:white;
border-radius:15px;
padding:25px;
box-shadow:0 4px 15px #ddd;
}