
        @page {
            size: A4;
            margin: 0.5in;
        }
        
        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.4;
            margin: 0;
            padding: 20px;
            background: #f8f9fa;
            color: #333;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        
        .header {
            background: linear-gradient(135deg, #8e44ad, #3498db, #1abc9c);
            color: white;
            padding: 35px;
            text-align: center;
            position: relative;
        }
        
        .header::before {
            content: "🗺️";
            position: absolute;
            top: 15px;
            right: 30px;
            font-size: 3em;
            opacity: 0.3;
        }
        
        .header h1 {
            margin: 0;
            font-size: 3.2em;
            font-weight: bold;
            text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
        }
        
        .subtitle {
            font-size: 1.4em;
            margin-top: 12px;
            opacity: 0.95;
            font-style: italic;
        }
        
        .content {
            padding: 35px;
        }
        
        .overview-box {
            background: linear-gradient(135deg, #ebf3fd, #d5e8d4);
            border-left: 6px solid #3498db;
            padding: 28px;
            margin-bottom: 35px;
            border-radius: 0 10px 10px 0;
            position: relative;
        }
        
        .overview-box::before {
            content: "🧠";
            position: absolute;
            top: 20px;
            right: 25px;
            font-size: 2.5em;
            opacity: 0.6;
        }
        
        .overview-box h2 {
            margin-top: 0;
            color: #2c3e50;
            font-size: 1.7em;
        }
        
        .main-idea-highlight {
            background: #3498db;
            color: white;
            padding: 10px 18px;
            border-radius: 25px;
            display: inline-block;
            font-weight: bold;
            font-size: 1.1em;
            margin: 12px 0;
            box-shadow: 0 3px 8px rgba(52, 152, 219, 0.3);
        }
        
        .specs {
            display: flex;
            justify-content: space-around;
            background: linear-gradient(45deg, #f4f1f8, #e8f6f3);
            padding: 28px;
            margin: 30px 0;
            border-radius: 15px;
            border: 2px solid #bb8fce;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }
        
        .spec-item {
            text-align: center;
            flex: 1;
            position: relative;
        }
        
        .spec-item::after {
            content: "";
            position: absolute;
            right: 0;
            top: 20%;
            height: 60%;
            width: 2px;
            background: linear-gradient(to bottom, #8e44ad, #3498db);
            opacity: 0.6;
        }
        
        .spec-item:last-child::after {
            display: none;
        }
        
        .spec-label {
            font-weight: bold;
            color: #7d3c98;
            font-size: 0.95em;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .spec-value {
            font-size: 1.4em;
            color: #2e86ab;
            margin-top: 10px;
            font-weight: bold;
        }
        
        .section {
            margin-bottom: 40px;
        }
        
        .section h3 {
            color: #7d3c98;
            font-size: 1.6em;
            margin-bottom: 25px;
            border-bottom: 4px solid #bb8fce;
            padding-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .concept-demo {
            background: #fdfdfe;
            border: 3px solid #bb8fce;
            border-radius: 15px;
            padding: 35px;
            margin: 30px 0;
            position: relative;
            overflow: hidden;
        }
        
        .concept-demo::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(187, 143, 206, 0.05) 0%, transparent 70%);
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-10px) rotate(2deg); }
        }
        
        .demo-title {
            text-align: center;
            color: #7d3c98;
            font-size: 1.3em;
            font-weight: bold;
            margin-bottom: 25px;
        }
        
        .concept-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            position: relative;
            z-index: 1;
        }
        
        .main-concept {
            background: linear-gradient(135deg, #8e44ad, #9b59b6);
            color: white;
            padding: 20px 30px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 1.2em;
            box-shadow: 0 5px 15px rgba(142, 68, 173, 0.4);
            border: 3px solid white;
            position: relative;
        }
        
        .sub-concepts {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 15px;
            width: 100%;
            margin-top: 25px;
        }
        
        .sub-concept {
            background: linear-gradient(135deg, #3498db, #5dade2);
            color: white;
            padding: 15px 20px;
            border-radius: 25px;
            text-align: center;
            font-weight: bold;
            font-size: 0.9em;
            box-shadow: 0 3px 10px rgba(52, 152, 219, 0.3);
            border: 2px solid white;
            position: relative;
        }
        
        .connection-lines {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 2px;
            height: 80px;
            background: linear-gradient(to bottom, #8e44ad, #3498db);
            opacity: 0.6;
        }
        
        .materials-section {
            background: #fff8dc;
            border: 3px solid #f39c12;
            border-radius: 15px;
            padding: 30px;
            margin: 30px 0;
        }
        
        .materials-section h4 {
            margin-top: 0;
            color: #e67e22;
            font-size: 1.4em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .materials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }
        
        .material-item {
            background: white;
            border: 2px solid #f39c12;
            border-radius: 10px;
            padding: 20px;
            text-align: center;
            box-shadow: 0 2px 8px rgba(243, 156, 18, 0.2);
        }
        
        .material-icon {
            font-size: 2.5em;
            margin-bottom: 10px;
            display: block;
        }
        
        .material-name {
            font-weight: bold;
            color: #d68910;
            margin-bottom: 8px;
        }
        
        .material-desc {
            color: #7d6608;
            font-size: 0.9em;
        }
        
        .benefits-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        
        .benefit-card {
            background: linear-gradient(135deg, #e8f5e8, #d5f4e6);
            border: 3px solid #27ae60;
            border-radius: 15px;
            padding: 28px;
            text-align: center;
            position: relative;
            box-shadow: 0 4px 12px rgba(39, 174, 96, 0.2);
        }
        
        .benefit-icon {
            font-size: 3em;
            margin-bottom: 15px;
            display: block;
        }
        
        .benefit-title {
            font-weight: bold;
            color: #1e8449;
            margin-bottom: 12px;
            font-size: 1.2em;
        }
        
        .benefit-desc {
            color: #145a32;
            line-height: 1.5;
        }
        
        .quote-section {
            background: linear-gradient(135deg, #eaf2f8, #d6eaf8);
            border-left: 6px solid #2980b9;
            padding: 30px;
            margin: 30px 0;
            border-radius: 0 12px 12px 0;
            position: relative;
            font-style: italic;
        }
        
        .quote-section::before {
            content: """;
            font-size: 5em;
            color: #2980b9;
            position: absolute;
            top: -15px;
            left: 20px;
            opacity: 0.3;
        }
        
        .quote-text {
            color: #154360;
            font-size: 1.15em;
            line-height: 1.7;
            margin-left: 40px;
            margin-bottom: 15px;
        }
        
        .quote-author {
            text-align: right;
            color: #1b4f72;
            font-weight: bold;
            font-size: 1.1em;
        }
        
        .implementation-steps {
            background: #f8f9fa;
            border: 3px solid #6c757d;
            border-radius: 15px;
            padding: 30px;
            margin: 30px 0;
        }
        
        .implementation-steps h4 {
            margin-top: 0;
            color: #495057;
            font-size: 1.4em;
            text-align: center;
            margin-bottom: 25px;
        }
        
        .steps-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .steps-list li {
            background: white;
            border: 2px solid #dee2e6;
            border-radius: 10px;
            padding: 18px;
            margin-bottom: 15px;
            position: relative;
            padding-left: 60px;
        }
        
        .step-number {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            background: #6c757d;
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .footer {
            background: linear-gradient(135deg, #7d3c98, #2e86ab);
            color: white;
            padding: 30px;
            text-align: center;
            margin-top: 35px;
        }
        
        .footer-content {
            font-size: 1em;
            line-height: 1.7;
        }
        
        .resource-link {
            background: rgba(255, 255, 255, 0.2);
            padding: 8px 15px;
            border-radius: 20px;
            display: inline-block;
            margin-top: 10px;
            font-weight: bold;
        }
        
        @media print {
            body {
                background: white;
            }
            .container {
                box-shadow: none;
            }
            .concept-demo::before {
                animation: none;
            }
        }
    