body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #f8f9fa;
}

.sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 1rem;
}

.sidebar .nav-link {
    color: #495057;
}

.sidebar .nav-link.active {
    color: #0d6efd;
}

.sidebar .nav-link i {
    margin-right: 0.5rem;
}

main {
    margin-left: 250px;
    padding: 1rem;
}

footer {
    background-color: #f8f9fa;
    position: fixed;
    bottom: 0;
    width: 100%;
}