body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    text-align: center;
    margin: 0;
    padding: 0;
}

.center-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.btn-primary {
    font-size: 18px;
    padding: 10px 20px;
}

.modal-header {
    background-color: #007bff;
    color: white;
}

.modal-footer {
    justify-content: center;
}

.alert {
    max-width: 600px;
    margin: 20px auto;
}

.list-group-item {
    text-align: left;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
}

h4.alert-heading {
    font-weight: bold;
    margin-bottom: 15px;
}