.container {
    max-width: 800px;
}

.card {
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn {
    margin-top: 10px;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}

.form-control {
    margin-bottom: 15px;
}