body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

h1 {
    text-align: center;
}

.language-switch {
    text-align: center;
    margin-bottom: 20px;
}

.categories ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.categories li {
    margin: 5px;
}

.categories a {
    text-decoration: none;
    padding: 10px 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f4f4f4;
    color: #333;
    display: block;
    text-align: center;
}

.categories a.active {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}

th {
    background-color: #f4f4f4;
}

@media (max-width: 600px) {
    .categories ul {
        flex-direction: column;
        align-items: stretch;
    }

    .categories a {
        width: 88%;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 8px;
    }
}