@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Orbitron:wght@700&display=swap');

    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
    }

    header {
        background: rgba(0, 0, 0, 0.5);
        padding: 20px;
        text-align: center;
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
    }

    header h1 {
        margin: 0;
        font-family: 'Orbitron', sans-serif;
        font-size: 2em;
        color: #ffffff;
    }

    nav {
        display: flex;
        justify-content: center;
        margin-top: 10px;
    }

    nav a {
        margin: 0 15px;
        padding: 10px 20px;
        background: rgba(63, 135, 166, 0.7);
        border-radius: 5px;
        text-decoration: none;
        color: #ffffff;
        transition: transform 0.3s, box-shadow 0.3s;
    }

    nav a:hover {
        transform: scale(1.05);
        box-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
    }

    nav a.active {
        background: #3f87a6;
    }

    .container {
        padding: 120px 20px 40px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section {
        margin-bottom: 40px;
    }

    .section h2 {
        font-family: 'Orbitron', sans-serif;
        font-size: 1.8em;
        margin-bottom: 20px;
        text-align: center;
        color: #ffffff;
    }

    .cards {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        width: 300px;
        margin: 10px;
        padding: 20px;
        box-sizing: border-box;
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 5px;
    }

    .card h3 {
        margin-top: 15px;
        font-size: 1.5em;
        color: #ffffff;
    }

    .card p {
        margin-top: 10px;
        font-size: 1em;
        color: #dddddd;
    }

    .example-article {
        background: rgba(0, 0, 0, 0.6);
        padding: 20px;
        border-radius: 10px;
        overflow-x: auto;
    }

    .example-article h2, .example-article h3, .example-article h4 {
        color: #ffffff;
    }

    .example-article p, .example-article ul, .example-article ol, .example-article table {
        color: #dddddd;
    }

    .example-article pre {
        background: #2a5298;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .example-article code {
        color: #ffcc00;
    }

    footer {
        text-align: center;
        padding: 20px;
        background: rgba(0, 0, 0, 0.5);
        color: #ffffff;
        position: fixed;
        width: 100%;
        bottom: 0;
    }

    @media (max-width: 768px) {
        nav {
            flex-direction: column;
        }

        nav a {
            margin: 10px 0;
        }

        .cards {
            flex-direction: column;
            align-items: center;
        }

        .card {
            width: 90%;
        }
    }