.test-container {
    background-color: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.question {
    background-color: #ffffff;
    border-left: 5px solid #3498db;
}

.question h4 {
    color: #2c3e50;
}

.form-check-input:checked {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-success {
    background-color: #2ecc71;
    border: none;
    font-weight: bold;
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

.btn-success:hover {
    background-color: #27ae60;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}