body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

h1, h2, h3, h4 {
    color: #333;
}

.btn-primary {
    border-radius: 8px;
    background-color: #0069d9;
    border-color: #0062cc;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004a9f;
}