:root {
        --primary-color: #0A192F;
        --secondary-color: #E0E0E0;
        --accent-color-purple: #8A2BE2;
        --accent-color-green: #39FF14;
        --font-primary: 'Roboto', sans-serif;
        --font-secondary: 'Helvetica', sans-serif;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: var(--font-secondary);
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: var(--secondary-color);
        line-height: 1.6;
        padding: 20px;
    }

    header {
        text-align: center;
        padding: 50px 20px;
        background: radial-gradient(circle, var(--primary-color), transparent);
        animation: aurora-move 15s linear infinite;
    }

    header h1 {
        font-family: var(--font-primary);
        font-size: 3rem;
        font-weight: bold;
        color: var(--accent-color-purple);
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2rem;
        color: var(--secondary-color);
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin: 20px 0;
    }

    nav a {
        color: var(--secondary-color);
        text-decoration: none;
        font-size: 1rem;
        position: relative;
    }

    nav a::after {
        content: '';
        display: block;
        width: 0;
        height: 2px;
        background: var(--accent-color-green);
        transition: width 0.3s;
    }

    nav a:hover::after {
        width: 100%;
    }

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

    .section {
        margin-bottom: 50px;
    }

    .section h2 {
        font-family: var(--font-primary);
        font-size: 2.5rem;
        color: var(--accent-color-purple);
        margin-bottom: 20px;
        text-align: center;
    }

    .cards {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }

    .card {
        background: var(--primary-color);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        width: calc(33.333% - 40px);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.5);
    }

    .card img {
        width: 100%;
        border-radius: 5px;
        margin-bottom: 15px;
    }

    .card h3 {
        font-family: var(--font-primary);
        font-size: 1.5rem;
        color: var(--accent-color-green);
        margin-bottom: 10px;
    }

    .card p {
        font-size: 1rem;
        color: var(--secondary-color);
    }

    .sample-article {
        background: var(--primary-color);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        margin-top: 50px;
    }

    .sample-article h2 {
        font-family: var(--font-primary);
        font-size: 2rem;
        color: var(--accent-color-purple);
        margin-bottom: 20px;
        text-align: center;
    }

    .sample-article h3, .sample-article h4 {
        font-family: var(--font-primary);
        color: var(--accent-color-green);
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .sample-article p {
        font-size: 1rem;
        color: var(--secondary-color);
        margin-bottom: 15px;
    }

    .sample-article pre {
        background: #1e2a38;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .sample-article code {
        font-family: 'Courier New', Courier, monospace;
        color: var(--accent-color-green);
    }

    .gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-top: 30px;
    }

    .gallery img {
        width: 160px;
        height: 160px;
        object-fit: cover;
        border-radius: 5px;
    }

    footer {
        text-align: center;
        padding: 20px;
        background: var(--primary-color);
        color: var(--secondary-color);
        font-size: 1rem;
    }

    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    @media (max-width: 1440px) {
        .card {
            width: calc(33.333% - 40px);
        }
    }

    @media (max-width: 1200px) {
        .card {
            width: calc(50% - 40px);
        }
    }

    @media (max-width: 768px) {
        .cards {
            flex-direction: column;
            align-items: center;
        }
        .card {
            width: 80%;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 2rem;
        }
        .card {
            width: 100%;
        }
        .gallery img {
            width: 120px;
            height: 120px;
        }
    }

    @media (max-width: 320px) {
        header {
            padding: 30px 10px;
        }
        header h1 {
            font-size: 1.5rem;
        }
        .section h2 {
            font-size: 2rem;
        }
        .sample-article {
            padding: 20px;
        }
    }

    /* Code block styling */
    pre {
        background: #1e2a38;
        color: #39FF14;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
    }

    a[rel="nofollow"] {
        /* No additional styles needed */
    }