body {
    background-color: #f5f5f5;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar {
    background-color: #6c757d;
}

.navbar-brand {
    color: #ffffff;
}

.navbar-brand:hover {
    color: #f8f9fa;
}

.container {
    margin-top: 20px;
}

.card {
    margin-bottom: 20px;
}

.card-header {
    background-color: #6c757d;
    color: white;
}

.card-body {
    background-color: #ffffff;
}

.footer {
    background-color: #6c757d;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 20px;
}