body {
    font-family: 'Tahoma', sans-serif;
    text-align: center;
    margin-top: 50px;
    background-color: #333; /* Dark Grey */
    color: #fff; /* White */
}

input[type="text"] {
    padding: 10px;
    margin: 10px;
    border: 1px solid #666; /* Medium Grey */
    border-radius: 5px;
    outline: none;
    background-color: #444; /* Darker Grey */
    color: #fff; /* White */
}

button {
    padding: 10px 20px;
    margin: 10px;
    cursor: pointer;
    background-color: #4CAF50; /* Green */
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049; /* Darker Green */
}
#copyButton {
            display: none;
        }

#validationResult {
    margin-top: 20px;
    font-size: 18px;
    color: #4CAF50; /* Green */
}

#codeMelliField {
    color: #f00; /* Red */
}

#validationResult.wrong {
    color: #f00; /* Red */
}