Responsive Navbar with Search, Menu, and Profile

This implements a responsive navigation header with the following elements: - Company logo and branding on left - Mobile menu toggle button - Search input in center on desktop, hidden on mobile - Notification icon button on right - Profile dropdown menu on far right It uses Tailwind CSS utility classes for styling, responsiveness, and interactions. Some key classes used: - Flexbox for layout and positioning - Responsive display utilities to hide/show elements - Hover, focus, and active styles for interactivity - Divider, background, padding, etc for styling - Navigation and menu semantics for accessibility