body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

.container-fluid {
    display: flex;
}

.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    height: 100vh;
    position: fixed;
}

.sidebar h2 {
    margin-top: 0;
}

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

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    color: white;
    text-decoration: none;
}

.sidebar ul li a:hover {
    text-decoration: underline;
}

main {
    margin-left: 270px;
    padding: 30px;
    width: calc(100% - 270px);
}

.card {
    border-radius: 10px;
}

.table {
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

.btn-primary {
    background-color: #28a745;
    border: none;
}

.btn-primary:hover {
    background-color: #218838;
}