body {
    background-color: #f8f9fa;
    min-height: 100vh;
}

.card {
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#previewImage {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
}

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

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

.btn-success {
    background-color: #28a745;
    border-color: #28a745;
}

.btn-success:hover {
    background-color: #218838;
    border-color: #218838;
}