nav{
    background: #0056b3;
    color: #fff;
    padding: 15px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 20px;
    grid-template-columns: 1fr 1fr 1fr;
    display: grid;
        --font-family: 'Arial', sans-serif;
}
a{
    text-decoration: none;
    color: white;

}
article {
    font-family: Arial, sans-serif;
    margin: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
}

article p {
    line-height: 1.6;
    color: #333;
    margin-bottom: 15px;
}

article .has-text-align-left {
    text-align: left;
    color: #003cff;
    font-weight: bold;
}

article .has-custom-size {
    font-size: 30px;
    text-decoration: underline;
}
h2{
    font-size: 2em;
    color: #0056b3;
    font-weight: bold;
    margin-bottom: 20px;
    display: grid;
    justify-items: center;
}
article iframe {
    border: solid 1px #777;
    max-width: 100%;
    height: 600px;
    margin: 10px 0;
}

article a {
    color: #003cff;
    text-decoration: none;
}

article a:hover {
    text-decoration: underline;
}

article mark {
    background-color: transparent;
    color: #003cff;
    font-weight: bold;
}

@media (max-width: 768px) {

    article {
        padding: 10px;
        margin: 10px;
    }

    article .has-custom-size {
        font-size: 24px;
    }

    article iframe {
        height: 400px;
    }
}

@media (max-width: 480px) {

    article iframe {
        height: 300px;
    }

    article .has-custom-size {
        font-size: 20px;
    }
}