body{
font-family: Arial;
margin:0;
background:#f5f6f8;
}

.layout{
display:flex;
}

.sidebar{
width:220px;
background:#111827;
color:white;
height:100vh;
padding:20px;
}

.sidebar ul{
list-style:none;
padding:0;
}

.sidebar li{
padding:10px;
cursor:pointer;
}

.sidebar .active{
background:#1f2937;
border-radius:6px;
}

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

.grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:20px;
}

.card{
background:white;
padding:20px;
border-radius:10px;
box-shadow:0 2px 6px rgba(0,0,0,0.1);
}

input{
width:100%;
padding:8px;
margin-bottom:10px;
}

button{
background:#2563eb;
color:white;
border:none;
padding:10px;
border-radius:6px;
cursor:pointer;
width:100%;
}