:root {
        --primary-color: #4A90E2;
        --secondary-color: #FF6F61;
        --background-color: #F7F7F7;
        --text-color: #333333;
        --highlight-color: #FFC107;
        --font-family: 'Roboto', 'Open Sans', sans-serif;
    }

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

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

    header {
        text-align: center;
        padding: 40px 0;
        background: radial-gradient(circle, rgba(255, 87, 34, 0.3), transparent);
        animation: aurora-move 15s linear infinite;
    }

    header h1 {
        font-size: 2.5rem;
        color: var(--secondary-color);
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2rem;
    }

    main {
        max-width: 1200px;
        margin: 0 auto;
    }

    article {
        background-color: #ffffff;
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        margin-bottom: 40px;
    }

    article h2 {
        font-size: 2rem;
        margin-bottom: 20px;
        color: var(--primary-color);
    }

    article h3 {
        font-size: 1.5rem;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    article h4 {
        font-size: 1.2rem;
        margin-top: 20px;
        margin-bottom: 10px;
    }

    article p {
        margin-bottom: 15px;
    }

    pre {
        background: #f4f4f4;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        background: #eaeaea;
        padding: 2px 4px;
        border-radius: 3px;
    }

    .card-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        padding: 20px;
    }

    .card {
        background-color: var(--background-color);
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        overflow: hidden;
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }

    .card img {
        width: 100%;
        height: auto;
    }

    .card-content {
        padding: 20px;
    }

    .card-content h3 {
        margin-bottom: 10px;
        color: var(--secondary-color);
    }

    .card-content p {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    .card-content ul {
        list-style: disc inside;
    }

    .card-content ul li {
        margin-bottom: 8px;
    }

    footer {
        text-align: center;
        padding: 30px 0;
        color: var(--text-color);
    }

    /* Animation */
    @keyframes aurora-move {
        0% { background: radial-gradient(circle, rgba(255, 87, 34, 0.3), transparent); }
        50% { background: radial-gradient(circle, rgba(75, 105, 226, 0.3), transparent); }
        100% { background: radial-gradient(circle, rgba(255, 87, 34, 0.3), transparent); }
    }

    /* Responsive Typography */
    @media (max-width: 768px) {
        header h1 {
            font-size: 2rem;
        }

        article h2 {
            font-size: 1.8rem;
        }

        .card-content h3 {
            font-size: 1.1rem;
        }
    }

    @media (max-width: 480px) {
        body {
            padding: 10px;
        }

        header h1 {
            font-size: 1.8rem;
        }

        article {
            padding: 20px;
        }

        .card-content h3 {
            font-size: 1rem;
        }
    }

    /* Code Block Styling */
    pre code {
        display: block;
        white-space: pre-wrap;
        word-wrap: break-word;
    }