body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    background:#f4f6f9;
}

/* Sidebar */
.sidebar{
    width:220px;
    height:100vh;
    background:#2c3e50;
    position:fixed;
    padding-top:20px;
}

.sidebar h2{
    color:white;
    text-align:center;
    margin-bottom:30px;
}

.sidebar a{
    display:block;
    color:#ddd;
    padding:12px 20px;
    text-decoration:none;
    transition:0.3s;
}

.sidebar a:hover{
    background:#34495e;
    color:#fff;
}

/* Main content */
.main{
    margin-left:220px;
    padding:30px;
}

.header{
    font-size:28px;
    margin-bottom:20px;
}

/* Cards */
.cards{
    display:flex;
    gap:20px;
    flex-wrap:wrap;
}

.card{
    background:white;
    padding:25px;
    flex:1;
    min-width:200px;
    border-radius:8px;
    box-shadow:0 4px 10px rgba(0,0,0,0.1);
    text-align:center;
}

.card h3{
    margin:0;
    font-size:20px;
    color:#555;
}

.card p{
    font-size:30px;
    margin-top:10px;
    font-weight:bold;
    color:#333;
}

table{
width:100%;
border-collapse:collapse;
background:white;
}

th,td{
padding:12px;
border-bottom:1px solid #ddd;
}

th{
background:#3498db;
color:white;
}