CSS Responsive Navigation Bar - Adaptive Navigation

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Responsive Navigation - Example</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200" />
    <link rel="stylesheet" href="style.css">
    <script src="script.js" defer></script>
</head>
<body>
    <nav class="responsive-navbar" id="navbar" role="navigation" aria-label="Main navigation">
        <a href="#" class="nav-brand" aria-label="Home page">
            <span class="domov">TUTORIAL</span>
            <span class="material-symbols-outlined" aria-hidden="true">home</span>
        </a>
    
        <div class="nav-links">
            <a href="#" class="active">Products</a>
            <a href="#">Services</a>
            <a href="#">Portfolio</a>
            <a href="#">About Us</a>
            <a href="#">Contact</a>
        </div>
    
        <div class="searchBox" role="search">
            <input id="iskalnik" type="search" placeholder="Search..." name="search" aria-label="Search field">
        </div>
    
        <a href="javascript:void(0);" class="icon" onclick="odzivenNavbar()" 
           aria-label="Open mobile menu" aria-expanded="false">
            <span class="material-symbols-outlined">menu</span>
        </a>
    </nav>
    
    <main class="responsive-container">
        <h1>Welcome to the CSS Tutorial</h1>
        <p>Resize the browser or simulator window to see the switch to the mobile menu with a hamburger icon.</p>
    </main>
</body>
</html>

:root {
    --nav-bg: var(--card, #ffffff);
    --nav-fg: var(--fg, #1e293b);
    --nav-hover-bg: rgba(0, 123, 255, 0.08);
    --nav-accent: var(--accent, #007bff);
    --nav-border: var(--border, #e2e8f0);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg, #f8fafc);
}

/* Glavni navbar z uporabo Flexbox-a */
.responsive-navbar {
    display: flex;
    align-items: center;
    background-color: var(--nav-bg);
    padding: 12px 30px;
    gap: 20px;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.responsive-navbar a {
    color: var(--nav-fg);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.25s ease;
}

.responsive-navbar a:hover,
.responsive-navbar a.active {
    background-color: var(--nav-hover-bg);
    color: var(--nav-accent);
}

.nav-brand {
    font-weight: 800 !important;
    font-size: 1.15rem !important;
    letter-spacing: 1px;
    color: var(--nav-accent) !important;
}

/* Skupina povezav */
.nav-links {
    display: flex;
    gap: 5px;
}

.responsive-navbar .searchBox {
    margin-left: auto; /* Potisne iskalnik in hamburger na desno stran */
    width: 220px;
}

.responsive-navbar input[type=search] {
    width: 100%;
    padding: 8px 16px;
    border: 1px solid var(--nav-border);
    background-color: var(--bg, #f1f5f9);
    color: var(--nav-fg);
    border-radius: 20px;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.3s ease;
}

.responsive-navbar input[type=search]:focus {
    border-color: var(--nav-accent);
    background-color: var(--nav-bg);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15);
}

/* Gumb za mobilni meni (hamburger) */
.responsive-navbar .icon {
    display: none;
    padding: 8px;
    border-radius: 50%;
}

.material-symbols-outlined {
    font-variation-settings: "FILL" 0, "wght" 500, "GRAD" 0, "opsz" 24;
    vertical-align: middle;
}

/* Ikona domov na računalnikih je skrita */
.nav-brand .material-symbols-outlined {
    display: none;
}

.responsive-container {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 20px;
    text-align: center;
    color: var(--nav-fg);
}

.responsive-container h1 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.responsive-container p {
    font-size: 1.1rem;
    opacity: 0.8;
    line-height: 1.6;
}

/* ========================================================
   ENOTNA PRELOMNA TOČKA ZA RESPONSIVE DIZAJN (768px)
   ======================================================== */
@media screen and (max-width: 768px) {
    .responsive-navbar {
        flex-wrap: wrap;
        padding: 12px 20px;
    }

    /* Skrijemo navadne povezave na mobilnih napravah */
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 8px;
        order: 3; /* Pomakne povezave povsem na dno ob odprtju */
    }

    /* Prikažemo hamburger gumb */
    .responsive-navbar .icon {
        display: block;
        margin-left: auto;
    }

    /* Na mobilnikih skrijemo tekst logotipa in prikažemo ikono hiške */
    .nav-brand .domov {
        display: none;
    }
    .nav-brand .material-symbols-outlined {
        display: inline-block;
    }

    /* Iskalnik gre čez celotno širino */
    .responsive-navbar .searchBox {
        display: none; /* Skrijemo na mobilnih za čistejši izgled menija */
    }

    /* Ko je dodan razred .responsive preko JS, prikažemo skrite povezave */
    .responsive-navbar.responsive .nav-links {
        display: flex;
        padding: 15px 0 5px 0;
        border-top: 1px solid var(--nav-border);
    }
    
    .responsive-navbar.responsive .nav-links a {
        width: 100%;
        text-align: center;
        padding: 10px;
    }
}

// 1. CRUCIAL: We attach the odzivenNavbar function directly to the "window" global object
// so that the HTML inline "onclick" event can call it without any issues!
window.odzivenNavbar = function() {
    const nav = document.getElementById("navbar");
    if (!nav) return;
    
    const menuButton = nav.querySelector(".icon");
    
    if (nav.classList.contains("responsive")) {
        nav.classList.remove("responsive");
        if (menuButton) menuButton.setAttribute("aria-expanded", "false");
    } else {
        nav.classList.add("responsive");
        if (menuButton) menuButton.setAttribute("aria-expanded", "true");
    }
}

// Safely listen for clicks on demo links after the DOM has loaded
document.addEventListener("DOMContentLoaded", function() {
    const links = document.querySelectorAll(".responsive-navbar a:not(.icon)");
    links.forEach(link => {
        link.addEventListener("click", function(e) {
            e.preventDefault();
            
            // Visually toggle the active state
            document.querySelectorAll(".responsive-navbar a").forEach(l => l.classList.remove("active"));
            this.classList.add("active");
            
            // If the mobile menu is open, close it when a link is clicked
            const nav = document.getElementById("navbar");
            if (nav && nav.classList.contains("responsive")) {
                window.odzivenNavbar();
            }
        });
    });
});