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

        .body-b {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #000;
            background-color: #f5f5f5;
            padding: 20px;
        }

        .article-container {
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        /* Header Styles */
        .main-header {
            background: linear-gradient(135deg, #de7a7a 0%, #DC143C 100%);
            padding: 60px 40px;
            text-align: center;
            position: relative;
        }

        .small-title {
            color: #2F4F4F;
            font-size: 1.8em;
            font-weight: 300;
            text-transform: uppercase;
            letter-spacing: 3px;
            margin-bottom: 10px;
        }

        .main-title {
            color: #8B0000;
            font-size: 4.5em;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            line-height: 1;
            margin: 20px 0;
            text-shadow: 3px 3px 0 #2F4F4F;
        }

        .subtitle {
            color: #2F4F4F;
            font-size: 1.8em;
            font-weight: 700;
            text-transform: uppercase;
            margin: 30px 0;
        }

        .author {
            color: #2F4F4F;
            font-size: 1.2em;
            font-weight: 600;
            margin-top: 30px;
            border-top: 2px solid #2F4F4F;
            padding-top: 15px;
            display: inline-block;
        }

        /* Content Styles */
        .content-section {
            padding: 50px 40px;
        }

        .intro-text {
            font-size: 1.3em;
            color: #2F4F4F;
            font-weight: 600;
            text-align: center;
            margin-bottom: 40px;
            line-height: 1.8;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .content-text {
            font-size: 1.1em;
            color: #000;
            line-height: 1.8;
            margin-bottom: 25px;
            text-align: justify;
        }

        .highlight {
            color: #8B0000;
            font-weight: bold;
        }

        .section-divider {
            height: 4px;
            background: linear-gradient(90deg, #8B0000 0%, #2F4F4F 100%);
            margin: 40px 0;
            border: none;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .main-header {
                padding: 40px 20px;
            }

            .small-title {
                font-size: 1.4em;
            }

            .main-title {
                font-size: 3em;
                text-shadow: 2px 2px 0 #2F4F4F;
            }

            .subtitle {
                font-size: 1.4em;
            }

            .content-section {
                padding: 30px 20px;
            }

            .intro-text {
                font-size: 1.1em;
            }

            .content-text {
                font-size: 1em;
            }
        }

        @media (max-width: 480px) {
            .main-title {
                font-size: 2.2em;
            }

            .small-title {
                font-size: 1.2em;
            }

            .subtitle {
                font-size: 1.2em;
            }

            .author {
                font-size: 1em;
            }
        }

        /* Additional Styling */
        .accent-red { color: #8B0000; }
        .accent-dark { color: #2F4F4F; }
        .text-center { text-align: center; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
.exercise-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .exercise-card {
            background: #f9f9f9;
            border-radius: 8px;
            padding: 25px;
            border-left: 5px solid #8B0000;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .exercise-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(139, 0, 0, 0.1);
        }

        .exercise-number {
            color: #8B0000;
            font-size: 1.5em;
            font-weight: 900;
            margin-bottom: 10px;
        }

        .exercise-title {
            color: #2F4F4F;
            font-size: 1.4em;
            font-weight: 700;
            margin-bottom: 15px;
            text-transform: uppercase;
        }

        .exercise-description {
            color: #000;
            line-height: 1.7;
        }
 @media (max-width: 768px) {
            .main-header {
                padding: 40px 20px;
            }

            .small-title {
                font-size: 1.4em;
            }

            .main-title {
                font-size: 3em;
                text-shadow: 2px 2px 0 #2F4F4F;
            }

            .subtitle {
                font-size: 1.4em;
            }

            .content-section {
                padding: 30px 20px;
            }

            .intro-text {
                font-size: 1.1em;
            }

            .exercise-grid {
                grid-template-columns: 1fr;
            }
        }