body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            margin: 0;
            padding: 0;
            background-color: #f5f5f5;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        header {
            background-color: #2c3e50;
            color: white;
            padding: 20px;
            position: relative;
        }
        .logo {
            font-size: 28px;
            font-weight: bold;
            color: #f39c12;
        }
        nav ul {
            list-style: none;
            padding: 0;
            display: flex;
            gap: 20px;
        }
        nav a {
            color: white;
            text-decoration: none;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
        }
        h1 {
            color: #e74c3c;
            margin-top: 30px;
        }
        h2 {
            color: #3498db;
            margin-top: 25px;
        }
        h3 {
            color: #2ecc71;
            margin-top: 20px;
        }
        .download-btn, .login-btn {
            display: inline-block;
            padding: 12px 24px;
            margin: 10px 0;
            background-color: #f39c12;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
        }
        .img-container {
            margin: 20px 0;
            text-align: center;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        footer {
            background-color: #2c3e50;
            color: white;
            padding: 20px;
            text-align: center;
            margin-top: 30px;
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                flex-direction: column;
            }
            .mobile-menu-btn {
                display: block;
                position: absolute;
                right: 20px;
                top: 20px;
            }
            nav.active ul {
                display: flex;
            }
        }