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

        body2 {
            font-family: 'Arial', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 20px;
            line-height: 1.6;
        }

        .magazine-spread {
            display: flex;
            max-width: 100%;
            margin: 0 auto;
            background: white;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }

        .left-page {
            flex: 1;
            padding: 20px;
            border-right: 3px solid #e0e0e0;
        }

        .right-page {
            flex: 1;
            padding: 20px;
        }

        .category-tag {
            background: #e53935;
            color: white;
            padding: 5px 15px;
            display: inline-block;
            font-weight: bold;
            font-size: 14px;
            margin-bottom: 20px;
        }

        .main-title {
            font-size: 72px;
            font-weight: 900;
            color: #1976d2;
            line-height: 0.9;
            margin-bottom: 30px;
            text-transform: uppercase;
            text-shadow: 3px 3px 6px rgba(0,0,0,0.1);
        }

        .subtitle {
            font-size: 24px;
            color: #424242;
            margin-bottom: 30px;
            padding: 20px;
            border-left: 5px solid #1976d2;
            background: #f5f5f5;
        }

        .credits {
            background: #f9f9f9;
            padding: 15px;
            border: 2px solid #ddd;
            margin: 20px 0;
            font-size: 12px;
        }

        .credits p {
            margin: 5px 0;
            color: #666;
        }

        .exercise-section {
            margin-bottom: 40px;
        }

        .exercise-title {
            font-size: 32px;
            color: #333;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .step {
            background: #fff;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 25px;
            position: relative;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .step:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }

        .step-number {
            background: #1976d2;
            color: white;
            width: 35px;
            height: 35px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 15px;
            font-size: 18px;
        }

        .step-title {
            font-weight: bold;
            color: #1976d2;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }

        .step-text {
            color: #555;
            padding-left: 20px;
            text-align: justify;
        }

        .page-number {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 2px solid #e0e0e0;
            color: #999;
            font-size: 14px;
        }

        .image-placeholder {
            background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
            border: 3px dashed #ccc;
            height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #999;
            font-size: 18px;
            margin: 20px 0;
            border-radius: 10px;
        }

        @media (max-width: 968px) {
            .magazine-spread {
                flex-direction: column;
            }
            
            .left-page, .right-page {
                border-right: none;
                border-bottom: 3px solid #e0e0e0;
            }
            
            .main-title {
                font-size: 48px;
            }
        }

        .highlight-box {
            background: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .tip {
            background: #d1ecf1;
            border-left: 5px solid #17a2b8;
            padding: 15px;
            margin: 15px 0;
            border-radius: 5px;
            font-style: italic;
        }
 .intro-text {
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 30px;
            color: #555;
            border-left: 4px solid var(--primary-blue);
            padding-left: 15px;
        }