body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: #f4f6f9;
}

/* SIDEBAR */
.sidebar {
    width: 250px;
    height: 100vh;
    background: #1e293b;
    position: fixed;
    color: #fff;
}

.sidebar h2 {
    text-align: center;
    padding: 20px;
    background: #0f172a;
    margin: 0;
}

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

.sidebar ul li {
    padding: 15px;
}

.sidebar ul li a {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
}

.sidebar ul li a:hover {
    background: #334155;
    color: #fff;
}

/* CONTENT */
.main {
    margin-left: 250px;
    padding: 20px;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

/* TOPBAR */
.topbar {
    background: #fff;
    padding: 10px 20px;
    border-bottom: 1px solid #ddd;
}