button {
    margin: 20px 0;
    padding: 10px 15px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #555;
}

.lang-btn {
    padding: 8px 15px;
    margin: 0 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: #333;
    color: #fff;
    font-size: 1em;
}

.lang-btn.active, .lang-btn:hover {
    background-color: #555;
}