:root {
        --main-bg-color: #121212;
        --secondary-bg-color: #1e1e1e;
        --accent-color-1: #4B0082;
        --accent-color-2: #6A5ACD;
        --accent-color-3: #FFD700;
        --text-color: #FFFFFF;
        --link-color: #00BFFF;
        --hover-color: #FF69B4;
        --font-family: 'Montserrat', sans-serif;
    }

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

    body {
        background: radial-gradient(circle, rgba(18,18,18,1) 0%, rgba(30,30,30,1) 100%);
        color: var(--text-color);
        font-family: var(--font-family);
        line-height: 1.6;
        overflow-x: hidden;
    }

    .container {
        display: grid;
        grid-template-columns: 250px 1fr;
        min-height: 100vh;
    }

    nav {
        background-color: var(--secondary-bg-color);
        padding: 20px;
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        width: 250px;
        overflow-y: auto;
    }

    nav h1 {
        font-size: 24px;
        margin-bottom: 30px;
        text-align: center;
        color: var(--accent-color-1);
    }

    nav ul {
        list-style: none;
    }

    nav ul li {
        margin-bottom: 20px;
    }

    nav ul li a {
        color: var(--link-color);
        text-decoration: none;
        font-size: 18px;
        transition: color 0.3s;
    }

    nav ul li a:hover {
        color: var(--hover-color);
    }

    main {
        margin-left: 250px;
        padding: 40px;
        background: rgba(30, 30, 30, 0.9);
        min-height: 100vh;
        overflow-y: auto;
    }

    main h2, main h3, main h4 {
        color: var(--accent-color-2);
        margin-bottom: 20px;
    }

    main p {
        margin-bottom: 20px;
    }

    pre {
        background: #2e2e2e;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        color: #00FF7F;
        font-family: 'Roboto', sans-serif;
    }

    .highlight {
        background: rgba(255, 255, 255, 0.1);
        padding: 10px;
        border-radius: 5px;
        margin-bottom: 20px;
    }

    img {
        width: 100%;
        max-width: 320px;
        height: auto;
        margin-bottom: 20px;
        border-radius: 10px;
    }

    @media (max-width: 1200px) {
        nav {
            width: 200px;
        }

        main {
            margin-left: 200px;
            padding: 30px;
        }
    }

    @media (max-width: 1024px) {
        .container {
            grid-template-columns: 200px 1fr;
        }
    }

    @media (max-width: 768px) {
        .container {
            grid-template-columns: 1fr;
        }

        nav {
            position: relative;
            width: 100%;
            height: auto;
        }

        main {
            margin-left: 0;
            padding: 20px;
        }
    }

    @media (max-width: 480px) {
        nav h1 {
            font-size: 20px;
        }

        nav ul li a {
            font-size: 16px;
        }

        main h2 {
            font-size: 22px;
        }

        main h3 {
            font-size: 20px;
        }

        main p, pre, code {
            font-size: 14px;
        }
    }

    @media (max-width: 320px) {
        nav h1 {
            font-size: 18px;
        }

        nav ul li a {
            font-size: 14px;
        }

        main h2 {
            font-size: 20px;
        }

        main h3 {
            font-size: 18px;
        }

        main p, pre, code {
            font-size: 12px;
        }
    }

    .footer {
        text-align: center;
        padding: 20px;
        color: var(--accent-color-3);
    }

    .warning {
        background: rgba(255, 215, 0, 0.2);
        padding: 15px;
        border-left: 5px solid var(--accent-color-3);
        margin-bottom: 20px;
    }

    a[rel="nofollow"] {
        /* No specific styles, but ensuring rel is set */
    }

    /* Animation for background stars */
    @keyframes scrollBackground {
        from { background-position: 0 0; }
        to { background-position: -1000px 0; }
    }

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 200%;
        height: 200%;
        background: url('https://images.gptkong.com/demo/sample4.png') repeat;
        z-index: -2;
        animation: scrollBackground 120s linear infinite;
        opacity: 0.3;
    }

    /* Dynamic logo animation */
    .logo {
        width: 100px;
        height: 100px;
        background: var(--accent-color-1);
        border-radius: 50%;
        animation: rotateLogo 10s linear infinite;
    }

    @keyframes rotateLogo {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }