body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    color: white;
}
.sidebar {
    width: 220px;
    height: 100vh;
    position: fixed;
    background: rgba(0,0,0,0.4);
    padding: 20px;
}
.sidebar a {
    display: block;
    color: white;
    margin: 10px 0;
    text-decoration: none;
}
.main {
    margin-left: 240px;
}
.topbar {
    background: rgba(255,255,255,0.1);
    padding: 15px;
    font-size: 18px;
}
.content {
    padding: 40px;
}
.card {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 10px;
}