body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; background-color: #f5f5dc; }
        h1 { color: #e67e22; text-align: center; border-bottom: 2px solid #e67e22; padding-bottom: 10px; }
        h2 { color: #2980b9; margin-top: 30px; }
        h3 { color: #27ae60; }
        .logo { font-size: 28px; font-weight: bold; color: #e67e22; text-align: center; margin: 20px 0; }
        .nav { display: flex; justify-content: space-around; background-color: #2980b9; padding: 10px; margin-bottom: 20px; }
        .nav a { color: white; text-decoration: none; }
        .mobile-nav-toggle { display: none; background: #e67e22; color: white; padding: 10px; text-align: center; cursor: pointer; }
        .download-btn, .login-btn { display: block; background: #27ae60; color: white; text-align: center; padding: 15px; margin: 20px 0; text-decoration: none; border-radius: 5px; }
        .img-container { text-align: center; margin: 20px 0; }
        img { max-width: 100%; height: auto; }
        .table-container { overflow-x: auto; margin: 20px 0; }
        table { width: 100%; border-collapse: collapse; }
        th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
        th { background-color: #f2f2f2; }
        .footer { margin-top: 40px; padding: 20px; background-color: #333; color: white; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .nav.active { display: flex; }
            .mobile-nav-toggle { display: block; }
        }