#code-checker-form {
    max-width: 500px;
    margin: 20px auto;
    text-align: center;
}
#code-checker-input {
    padding: 8px;
    width: 60%;
}
#code-checker-btn {
    padding: 8px 12px;
    margin-left: 5px;
}
#code-checker-message {
    margin-bottom: 10px;
    font-weight: bold;
}
#code-checker-message.success {
    background-color: #d4edda;
    color: #155724;
    padding: 10px;
}
#code-checker-message.error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
}