.learning-nav {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: .15rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .learning-nav-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .learning-nav-btn {
            padding: 0.75rem 1.5rem;
            border: 2px solid #667eea;
            background: white;
            color: #667eea;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 500;
            transition: all 0.2s;
            text-decoration: none;
        }

        .learning-nav-btn:hover {
            background: #667eea;
            color: white;
        }

        .learning-nav-btn.active {
            background: #667eea;
            color: white;
        }

        .learning-content {
            background: white;
            padding: 0 1rem 1rem 1rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            display: none;
            min-height: 500px;
        }

        .learning-content.active {
            display: block;
        }

        .learning-content h2 {
            color: #667eea;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f0f0f0;
        }

        .learning-content h3 {
            color: #764ba2;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }

          /*
        .learning-content pre {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 6px;
            padding: 1rem;
            overflow-x: auto;
            margin: 1rem 0;
        }

    .learning-content code {
            background: #f8f9fa;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-family: 'Monaco', 'Courier New', monospace;
            font-size: 0.9em;
        }

        .learning-content pre code {
            background: none;
            padding: 0;
        }
            */

        .learning-content ul,
        .learning-content ol {
            margin-left: 2rem;
            margin-bottom: 1rem;
        }

        .learning-content li {
            margin-bottom: 0.5rem;
        }

        .learning-content blockquote {
            border-left: 4px solid #667eea;
            padding-left: 1rem;
            margin: 1rem 0;
            color: #666;
            font-style: italic;
        }

        .learning-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
        }

        .learning-content th,
        .learning-content td {
            padding: 0.75rem;
            border: 1px solid #e9ecef;
            text-align: left;
        }

        .learning-content th {
            background: #f8f9fa;
            font-weight: 600;
        }

        .learning-search {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid #e9ecef;
            border-radius: 6px;
            font-size: 1rem;
            margin-bottom: 1rem;
        }

        .learning-search:focus {
            outline: none;
            border-color: #667eea;
        }

        .learning-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            text-align: center;
        }

        .learning-hero h1 {
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }

        .learning-hero p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

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

            .learning-nav-btn {
                width: 100%;
            }

            .learning-hero h1 {
                font-size: 1.5rem;
            }
        }


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


        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--text);
            /*background: linear-gradient(135deg, var(--c6-75) 0%, var(--c6-25) 100%);*/
            background: radial-gradient(ellipse at top, var(--c5-75), transparent),
                radial-gradient(ellipse at bottom, var(--c1-75), transparent);
            min-height: 100vh;

        }

        .hero {

            color: white;
            padding: 1rem 2rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0);
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 300;
            font-family: "Oswald", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #333;
        }

        .hero .tagline {
            font-size: 1.5rem;
            opacity: 0.95;
            margin-bottom: 2rem;
            color: #333;
        }

        .hero .subtitle {
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.9;
            color: #333;
        }

        .container {
            max-width: 1200px;
            margin: 20px auto;
            padding: 2rem;
            background: white;
            border-top-left-radius: 12px;
            border-top-right-radius: 12px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
h2, h3, h4, h5, h6 { margin: 2rem 0 1rem 0; }

 ul, ol {list-style-position: inside; }
 p {line-height: 1.5;}

 body #learningPage {
     background: radial-gradient(ellipse at top, var(--c5-75), transparent), radial-gradient(ellipse at bottom, var(--c2-75), transparent);
     min-height: 100vh;
 }