body {
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 10px;
}
.btn-primary {
    background-color: #0d6efd;
    border: none;
    padding: 0.75rem 2rem;
}
.btn-primary:hover {
    background-color: #0b5ed7;
}