Minimalist Navbar

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Minimalist Navbar</title>
    <style>
        /*
        ========================================
        CSS Custom Properties (Variables)
        ========================================
        Using variables makes it easy to customize the navbar's theme.
        */
        :root {
            --color-background: #ffffff; /* White background for a clean look */
            --color-foreground: #f8f9fa; /* A very light grey for subtle distinction if needed */
            --color-text: #333333;       /* Dark grey for readable text, high contrast */
            --color-primary: #007bff;     /* A standard, accessible blue for CTAs */
            --color-primary-hover: #0056b3;/* A darker blue for hover/focus states */
            --color-border-subtle: #e9ecef;/* Subtle border color */
            
            --font-family-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --font-weight-normal: 400;
            --font-weight-bold: 700;

--navbar-height: 70px;
            --navbar-padding: 1rem;
            --container-width: 1140px;

--transition-speed: 0.2s;
        }

/*
        ========================================
        Global Resets & Base Styles
        ========================================
        */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

body {
            margin: 0;
            font-family: var(--font-family-sans-serif);
            font-size: 1rem;
            font-weight: var(--font-weight-normal);
            line-height: 1.5;
            color: var(--color-text);
            background-color: var(--color-background);
        }

/* Add some placeholder content to demonstrate scrolling */
        body::after {
            content: 'Scroll down to see the navbar is not sticky by default.';
            display: block;
            text-align: center;
            height: 200vh;
            padding-top: 5rem;
            color: #aaa;
        }
        
        /* Remove default list styles */
        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

/* Basic link styling */
        a {
            text-decoration: none;
            color: var(--color-text);
        }

/*
        ========================================
        Main Navbar Structure
        ========================================
        */
        .navbar {
            height: var(--navbar-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--color-border-subtle);
        }

.navbar__container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 var(--navbar-padding);
        }
        
        .navbar__brand {
            font-size: 1.5rem;
            font-weight: var(--font-weight-bold);
        }

/*
        ========================================
        Mobile Menu & Hamburger Toggle
        ========================================
        This is the mobile-first approach.
        */
        .navbar__toggle {
            display: block; /* Shown on mobile */
            padding: 0.5rem;
            border: none;
            background: transparent;
            cursor: pointer;
            z-index: 1001; /* Ensure it's on top of menu */
        }

/* Hamburger icon lines */
        .navbar__toggle .bar {
            display: block;
            width: 25px;
            height: 3px;
            margin: 5px auto;
            background-color: var(--color-text);
            transition: all var(--transition-speed) ease-in-out;
        }
        
        /* Hamburger animation to 'X' when active */
        .navbar__toggle.is-active .bar:nth-child(2) {
            opacity: 0;
        }
        .navbar__toggle.is-active .bar:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .navbar__toggle.is-active .bar:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }
        
        .navbar__menu {
            display: none; /* Hidden by default on mobile */
            flex-direction: column;
            width: 100%;
            position: absolute;
            top: var(--navbar-height);
            left: 0;
            background-color: var(--color-background);
            border-bottom: 1px solid var(--color-border-subtle);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            z-index: 1000;
        }
        
        /* Show the menu when the .is-active class is present */
        .navbar__menu.is-active {
            display: flex;
        }

.navbar__item {
            text-align: center;
            border-bottom: 1px solid var(--color-border-subtle);
        }
        .navbar__item:last-child {
            border-bottom: none;
        }

.navbar__link {
            display: block;
            padding: 1.5rem;
            transition: background-color var(--transition-speed) ease;
        }
        
        .navbar__link:hover,
        .navbar__link:focus {
            background-color: var(--color-foreground);
        }
        
        /* Call to Action (CTA) Button - Mobile */
        .navbar__link--cta {
            color: var(--color-primary);
            font-weight: var(--font-weight-bold);
        }

/* Use :focus-visible for a better accessibility experience. 
           This outline only shows for keyboard users, not mouse clicks. */
        :is(.navbar__toggle, .navbar__link):focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

/*
        ========================================
        Desktop Navbar Styles (Responsive)
        ========================================
        Media query for screens 768px and wider.
        */
        @media (min-width: 768px) {
            .navbar__toggle {
                display: none; /* Hide the hamburger on desktop */
            }

.navbar__menu {
                /* These properties are correct for the <nav> container */
                display: flex; 
                align-items: center;
                position: static;
                width: auto;
                background-color: transparent;
                border: none;
                box-shadow: none;
            }

.navbar__list {
                /* This makes the list items (<li>) arrange in a row */
                display: flex;
                align-items: center;
            }

.navbar__item {
                /* Styles for individual list items are fine */
                border: none;
                margin-left: 0.5rem; /* Space between links */
            }
            
            .navbar__link {
                /* Adjusted styles for a horizontal layout */
                padding: 0.5rem 1rem;
                border-radius: 4px;
                /* Add a subtle bottom border for a clean underline effect */
                border-bottom: 2px solid transparent; 
            }

/* The classic "border on hover" effect */
            .navbar__link:not(.navbar__link--cta):hover,
            .navbar__link:not(.navbar__link--cta):focus {
                background-color: transparent; /* Override mobile hover */
                border-bottom-color: var(--color-primary);
                color: var(--color-text); /* Ensure text color remains consistent */
            }
            
            /* CTA Button Styling for Desktop */
            .navbar__item--cta {
                margin-left: 1.5rem;
            }
            
            .navbar__link--cta {
                color: #fff; /* White text on colored background */
                background-color: var(--color-primary);
                padding: 0.75rem 1.5rem; /* Make it more prominent */
                transition: background-color var(--transition-speed) ease;
                border-bottom: none; /* The CTA button doesn't need the bottom border */
            }

/* CTA hover effect */
            .navbar__link--cta:hover,
            .navbar__link--cta:focus {
                background-color: var(--color-primary-hover);
                border-bottom: none; /* Ensure no border on hover either */
            }
        }

</style>
</head>
<body>

<header class="navbar" role="banner">
        <div class="navbar__container">
            <a href="#" class="navbar__brand">BrandName</a>
            
            
            <button class="navbar__toggle" 
                    id="navbarToggle" 
                    aria-label="Toggle navigation" 
                    aria-controls="navbarMenu" 
                    aria-expanded="false">
                <span class="bar"></span>
                <span class="bar"></span>
                <span class="bar"></span>
            </button>
            
            <nav id="navbarMenu" class="navbar__menu" role="navigation" aria-labelledby="navbarToggle">
                <ul class="navbar__list">
                    <li class="navbar__item"><a href="#" class="navbar__link">Features</a></li>
                    <li class="navbar__item"><a href="#" class="navbar__link">Pricing</a></li>
                    <li class="navbar__item"><a href="#" class="navbar__link">About</a></li>
                    <li class="navbar__item"><a href="#" class="navbar__link">Contact</a></li>
                    <li class="navbar__item navbar__item--cta">
                        <a href="#" class="navbar__link navbar__link--cta">Sign Up</a>
                    </li>
                </ul>
            </nav>
        </div>
    </header>
    
    <script>
        // A small, accessible script to toggle the mobile menu.
        document.addEventListener('DOMContentLoaded', function () {
            const navbarToggle = document.getElementById('navbarToggle');
            const navbarMenu = document.getElementById('navbarMenu');

if (navbarToggle && navbarMenu) {
                navbarToggle.addEventListener('click', function () {
                    // Toggle the .is-active class on both the toggle and the menu
                    navbarToggle.classList.toggle('is-active');
                    navbarMenu.classList.toggle('is-active');

// Update the aria-expanded attribute
                    const isExpanded = navbarToggle.getAttribute('aria-expanded') === 'true';
                    navbarToggle.setAttribute('aria-expanded', !isExpanded);
                });
            }
        });
    </script>
</body>
</html>