```html
<nav id="navbar">
    <a href="index.html" class="logo">
        <img src="images/E-CAD%20Logo-2.png.png" alt="Profenaa Logo" class="nav-logo-img" loading="lazy">
        Profenaa <span>Technologies</span>
    </a>

    <div class="mobile-toggle" onclick="toggleMenu()">
        <i class="fas fa-bars" id="menu-icon"></i>
    </div>

    <ul class="nav-links" id="nav-menu">
        <li><a href="index">Home</a></li>
        <li><a href="about">About</a></li>
        <li class="dropdown" onclick="toggleDropdown(this)">
            <a href="#courses">Courses <i class="fa-solid fa-chevron-down" style="font-size: 0.7rem;"></i></a>
            <div class="dropdown-content">
                <div class="has-submenu" onclick="toggleSubmenu(this)">
                    <a href="#fullstack"><i class="fas fa-code"></i> Full Stack <i class="fa-solid fa-chevron-right" style="float:right; font-size:0.8rem;"></i></a>
                    <div class="submenu">
                        <a href="python-full-stack-course-tirupur"><i class="fab fa-python"></i> Python Full Stack</a>
                        <a href="java-full-stack-course-tirupur"><i class="fas fa-java"></i> Java Full Stack</a>
                        <a href="mean-mern-stack-course-tirupur"><i class="fas fa-database"></i> MEAN / MERN Stack</a>
                    </div>
                </div>

                <div class="has-submenu" onclick="toggleSubmenu(this)">
                    <a href="#data"><i class="fas fa-chart-pie"></i> Data & AI <i class="fa-solid fa-chevron-right" style="float:right; font-size:0.8rem;"></i></a>
                    <div class="submenu">
                        <a href="data-science-course-in-tirupur"><i class="fas fa-brain"></i> Data Science & AI</a>
                        <a href="data-analyst-course-in-tirupur"><i class="fas fa-chart-line"></i> Data Analyst</a>
                    </div>
                </div>

                <a href="Internship"><i class="fas fa-briefcase"></i> Internship</a>

                <a href="tally"><i class="fas fa-file-invoice"></i> Tally Prime Expert</a>
            </div>
        </li>

        <!-- BLOGS: Separate blog.html page -->
        <li>
            <a href="blog.html"
               onclick="event.stopPropagation(); window.location.href='./blog.html'; return false;">
                Blogs
            </a>
        </li>

        <li><a href="placement-training-tirupur">Placement</a></li>
        <li><a href="contact-it-training-tirupur" class="nav-btn">Join Now</a></li>
    </ul>
</nav>

<!-- LocalBusiness structured data (helps SEO when header included) -->
<script type="application/ld+json">
{
    "@context": "https://schema.org",
    "@type": "LocalBusiness",
    "name": "Profenaa Technologies & E-CAD Centre",
    "image": "https://profenaatechnologiestiruppur.com/E-CAD%20Logo-2.png.png",
    "telephone": "+917092225100",
    "email": "profenaa.tup@gmail.com",
    "address": {
        "@type": "PostalAddress",
        "streetAddress": "2nd Floor, RSP Towers, 292, Palladam Main Rd, near Canara Bank, Town Extn, Tiruppur, Tamil Nadu 641604",
        "addressLocality": "Tiruppur",
        "addressRegion": "Tamil Nadu",
        "postalCode": "641604",
        "addressCountry": "IN"
    },
    "geo": {
        "@type": "GeoCoordinates",
        "latitude": 11.1085242,
        "longitude": 77.3416736
    },
    "url": "https://profenaatechnologiestiruppur.com",
    "sameAs": [
        "https://www.facebook.com/profenaa",
        "https://www.instagram.com/profenaa",
        "https://www.linkedin.com/company/profenaa",
        "https://www.youtube.com/profenaa",
        "https://share.google/rmECZhkeLTjbrmDSN"
    ]
}
</script>

<!-- Google Analytics Placeholder -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXX"></script>

<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());
  gtag('config', 'G-XXXXXXX');
</script>

<style>
    :root {
        --primary: #3A75BC;
        --dark: #0f172a;
        --white: #FFFFFF;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    #navbar {
        background: rgba(255, 255, 255, 0.85);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        padding: 0.8rem 8%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 9999;
        border-bottom: 1px solid rgba(58, 117, 188, 0.1);
        transition: var(--transition);
    }

    /* LOGO IMAGE STYLING */
    .logo {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--primary);
        text-decoration: none;
        letter-spacing: -1px;
    }

    .nav-logo-img {
        height: 55px;
        width: auto;
        object-fit: contain;
        transition: var(--transition);
    }

    .logo span {
        color: var(--dark);
    }

    /* Nav links styles */
    .nav-links {
        list-style: none;
        display: flex;
        align-items: center;
        gap: 25px;
    }

    .nav-links a {
        text-decoration: none;
        color: var(--dark);
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
    }

    .nav-links a:hover {
        color: var(--primary);
    }

    .nav-btn {
        background: var(--primary);
        color: white !important;
        padding: 10px 24px;
        border-radius: 12px;
        box-shadow: 0 8px 15px rgba(58, 117, 188, 0.2);
    }

    /* Dropdown Logic */
    .dropdown {
        position: relative;
        cursor: pointer;
        padding: 10px 0;
    }

    .dropdown-content {
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%) translateY(10px);
        background: var(--white);
        min-width: 220px;
        border-radius: 15px;
        padding: 10px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .has-submenu {
        position: relative;
    }

    .submenu {
        position: absolute;
        top: 0;
        left: 100%;
        transform: translateX(10px) translateY(0);
        background: var(--white);
        min-width: 220px;
        border-radius: 12px;
        padding: 8px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .has-submenu:hover .submenu {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
    }

    .dropdown:hover .dropdown-content {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }

    .dropdown-content a {
        padding: 12px;
        display: flex;
        align-items: center;
        gap: 10px;
        border-radius: 8px;
    }

    .dropdown-content a:hover {
        background: #f0f7ff;
        color: var(--primary);
    }

    .mobile-toggle {
        display: none;
        font-size: 1.5rem;
        cursor: pointer;
    }

    /* Mobile Responsive Logic */
    @media (max-width: 1024px) {
        .mobile-toggle {
            display: block;
        }

        .nav-logo-img {
            height: 45px;
        }

        .nav-links {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: white;
            flex-direction: column;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s;
        }

        .nav-links.active {
            max-height: 500px;
            border-bottom: 1px solid #eee;
        }

        .nav-links li {
            width: 100%;
            text-align: center;
        }

        .nav-links a {
            padding: 15px;
            display: block;
        }

        .dropdown-content {
            position: static;
            transform: none;
            box-shadow: none;
            display: none;
            opacity: 1;
            visibility: visible;
        }

        .dropdown.active .dropdown-content {
            display: block;
        }

        .submenu {
            position: static;
            transform: none;
            box-shadow: none;
            display: none;
            opacity: 1;
            visibility: visible;
        }

        .has-submenu.active .submenu {
            display: block;
        }
    }
</style>

<script>
    function toggleMenu() {
        const menu = document.getElementById('nav-menu');
        const icon = document.getElementById('menu-icon');
        menu.classList.toggle('active');
        icon.classList.toggle('fa-bars');
        icon.classList.toggle('fa-times');
    }

    function toggleDropdown(element) {
        if (window.innerWidth <= 1024) {
            element.classList.toggle('active');
        }
    }

    function toggleSubmenu(element) {
        if (window.innerWidth <= 1024) {
            element.classList.toggle('active');
        }
    }

    // Scroll Background and Logo Scaling
    window.addEventListener('scroll', () => {
        const nav = document.getElementById('navbar');
        const logoImg = document.querySelector('.nav-logo-img');

        if (window.scrollY > 50) {
            nav.style.background = "white";
            nav.style.padding = "0.4rem 8%";
            logoImg.style.height = "45px";
        } else {
            nav.style.background = "rgba(255, 255, 255, 0.85)";
            nav.style.padding = "0.8rem 8%";
            logoImg.style.height = "55px";
        }
    });
</script>
```