body {
    background-color: #f5f5f5;
    padding: 20px;
    font-family: "Helvetica Neue", sans-serif;
}

.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-bottom: 30px;
}

.text-danger {
    color: red;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}