Duotone Split Navbar - Free UI Component

Left Panel Color #0f172a

Right Panel Color #ffffff

Left Text Color #ffffff

Right Text Color #0f172a

Accent Color #3b82f6

Vertical Padding (rem) 1.2

Fixed Position

Full Width

Container Width 100%

Page Background #f8fafc

Duotone Split Navbar

A bold, two-tone navigation bar with a distinct split-screen aesthetic. Ideal for high-contrast branding and clear information architecture.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Duotone Split Navbar</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Lexend:wght@400;500;600;700;800&display=swap" rel="stylesheet">
    <style>
        /* -- Variables ------------------------------------------------- */
        :root {
            --color-l: {{colorLeft}};             /* Left Panel Color */
            --color-r: {{colorRight}};            /* Right Panel Color */
            --text-l: {{textColorLeft}};          /* Left Text Color */
            --text-r: {{textColorRight}};         /* Right Text Color */
            --accent: {{accentColor}};            /* Accent Color */
            --v-pad: {{vPadding}}rem;             /* Vertical Padding */
            --nav-w: {{navWidth}};                /* Container Width */
            --page-bg: {{pageBg}};                /* Page Background */
        }

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

body {
            font-family: 'Lexend', sans-serif;
            background-color: var(--page-bg);
            min-height: 200vh;
            overflow-x: hidden;
        }

/* -- Navbar Implementation --------------------------------------- */
        .nav-wrapper {
            width: 100%;
            z-index: 1000;
            display: flex;
            justify-content: center;
            transition: all 0.3s ease;
        }

/* Positioning Logic */
        body[data-fixed="Yes"] .nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
        }
        body[data-fixed="No"] .nav-wrapper {
            position: relative;
        }

nav.duo-nav {
            width: 100%;
            display: flex;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

/* Layout Switch */
        body[data-full="No"] nav.duo-nav {
            max-width: var(--nav-w);
            margin: 1.5rem;
            border-radius: 20px;
        }
        body[data-full="No"] .nav-wrapper.scrolled nav.duo-nav {
            margin: 0.75rem 1.5rem;
        }
        body[data-full="Yes"] nav.duo-nav {
            max-width: 100%;
            border-radius: 0;
        }

/* Split Panels */
        .panel {
            padding: var(--v-pad) 2.5rem;
            display: flex;
            align-items: center;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

.panel-l {
            background: var(--color-l);
            color: var(--text-l);
            flex: 0 0 300px; /* Fixed width brand panel */
            justify-content: center;
            position: relative;
        }
        /* Slanted Divider */
        .panel-l::after {
            content: '';
            position: absolute;
            top: 0;
            right: -20px;
            width: 40px;
            height: 100%;
            background: var(--color-l);
            transform: skewX(-15deg);
            z-index: 1;
        }

.panel-r {
            background: var(--color-r);
            color: var(--text-r);
            flex: 1;
            justify-content: space-between;
            padding-left: 4rem; /* Extra room for slant */
        }

/* Branding */
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: inherit;
            text-decoration: none;
            letter-spacing: -0.04em;
            z-index: 2;
        }
        .logo span { color: var(--accent); }

/* Links */
        .links {
            display: flex;
            gap: 1.5rem;
            list-style: none;
        }
        .links a {
            color: inherit;
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 600;
            opacity: 0.7;
            transition: 0.3s;
        }
        .links a:hover, .links a.active {
            opacity: 1;
            color: var(--accent);
        }

/* Actions */
        .actions {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }
        .search-trigger {
            cursor: pointer;
            opacity: 0.5;
            transition: 0.3s;
        }
        .search-trigger:hover { opacity: 1; }

.btn-join {
            background: var(--accent);
            color: #fff;
            padding: 0.7rem 1.5rem;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 700;
            font-size: 0.85rem;
            transition: 0.3s;
        }
        .btn-join:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
        }

/* Hamburger */
        .hamburger {
            display: none;
            cursor: pointer;
            padding: 5px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: currentColor;
            margin: 5px 0;
            transition: 0.3s;
        }

/* Search Modal */
        .search-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.9);
            backdrop-filter: blur(8px);
            z-index: 2000;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .search-modal.active {
            opacity: 1;
            pointer-events: auto;
        }
        .search-box {
            width: 90%;
            max-width: 600px;
            transform: translateY(20px);
            transition: 0.4s 0.1s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .search-modal.active .search-box {
            transform: translateY(0);
        }
        .search-box input {
            width: 100%;
            background: none;
            border: none;
            border-bottom: 2px solid var(--accent);
            color: #fff;
            font-size: 2.5rem;
            font-weight: 700;
            padding: 1rem 0;
            outline: none;
            font-family: inherit;
        }
        .search-box p {
            color: rgba(255,255,255,0.5);
            margin-top: 1rem;
            font-size: 0.9rem;
        }
        .close-search {
            position: absolute;
            top: 2rem;
            right: 2rem;
            color: #fff;
            cursor: pointer;
            font-size: 1.5rem;
            font-weight: 300;
        }

/* -- Content ----------------------------------------------------- */
        .hero {
            padding: 12rem 2rem 5rem;
            max-width: 850px;
            margin: 0 auto;
            text-align: center;
        }
        body[data-fixed="No"] .hero { padding-top: 5rem; }

.hero h1 { font-size: 4rem; font-weight: 800; color: #0f172a; margin-bottom: 1.5rem; letter-spacing: -0.05em; line-height: 1.1; }
        .hero p { font-size: 1.25rem; color: #64748b; line-height: 1.6; }

.section {
            padding: 4rem 2rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            max-width: 1100px;
            margin: 0 auto;
        }
        .duo-card {
            padding: 3rem;
            border-radius: 30px;
            background: #fff;
            border: 1px solid rgba(0,0,0,0.05);
        }
        .duo-card.dark { background: #0f172a; color: #fff; }
        .duo-card h2 { margin-bottom: 1rem; font-weight: 800; }
        .duo-card p { opacity: 0.7; line-height: 1.7; }

/* -- Responsive -------------------------------------------------- */
        @media (max-width: 900px) {
            .panel-l { flex: 0 0 120px; }
            .panel-l::after { display: none; }
            .panel-r { padding-left: 2rem; }
            
            .links {
                display: none;
                position: absolute;
                top: 100%;
                left: 1rem;
                right: 1rem;
                background: var(--color-r);
                margin-top: 1rem;
                padding: 2rem;
                flex-direction: column;
                border-radius: 16px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.1);
                border: 1px solid rgba(0,0,0,0.05);
                z-index: 100;
            }
            body[data-full="Yes"] .links { left: 0; right: 0; border-radius: 0; margin-top: 0; }
            
            .nav-wrapper.menu-open .links { display: flex; }
            .hamburger { display: block; }
            
            .nav-wrapper.menu-open .hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
            .nav-wrapper.menu-open .hamburger span:nth-child(2) { opacity: 0; }
        }

@media (max-width: 600px) {
            .panel-l { flex: 1; justify-content: flex-start; padding: 1rem 1.5rem; }
            .panel-r { flex: 0; padding: 1rem 1.5rem; }
            .actions .btn-join { display: none; }
        }
    </style>
</head>
<body data-fixed="{{isFixed}}" data-full="{{isFullWidth}}">

<div class="panel panel-r">
                <ul class="links">
                    <li><a href="#" class="active">Platform</a></li>
                    <li><a href="#">Solutions</a></li>
                    <li><a href="#">Showcase</a></li>
                    <li><a href="#">Docs</a></li>
                </ul>

<div class="actions">
                    <div class="search-trigger" id="searchBtn">
                        <svg width="20" height="20" fill="none" stroke="currentColor" stroke-width="2.5" viewBox="0 0 24 24">
                            <circle cx="11" cy="11" r="8"></circle>
                            <path d="M21 21l-4.35-4.35"></path>
                        </svg>
                    </div>
                    <a href="#" class="btn-join">Start Building</a>
                    <div class="hamburger" id="mobileHam">
                        <span></span>
                        <span></span>
                    </div>
                </div>
            </div>
        </nav>
    </div>

<div class="search-modal" id="searchModal">
        <div class="close-search" id="closeSearch">× Close Esc</div>
        <div class="search-box">
            <input type="text" placeholder="Type to search..." autofocus>
            <p>Press Enter to search across docs and platform</p>
        </div>
    </div>

<main>
        <section class="hero">
            <h1>Contrast creates clarity.</h1>
            <p>A bold, split-screen navigation experience. The Duotone Navbar uses high-contrast panels to separate branding from navigation logic.</p>
        </section>

<section class="section">
            <div class="duo-card dark">
                <h2>The Dark Side</h2>
                <p>Use the Left Panel Color to establish your brand identity. The slanted divider creates a dynamic movement that leads the eye across the header.</p>
            </div>
            <div class="duo-card">
                <h2>The Light Side</h2>
                <p>The Right Panel provides a clean, breathable space for your navigation links and primary actions. It's fully customizable via the sidebar controls.</p>
            </div>
        </section>
    </main>

// Search Toggle
        searchBtn.addEventListener('click', () => {
            searchModal.classList.add('active');
            searchModal.querySelector('input').focus();
        });

closeSearch.addEventListener('click', () => {
            searchModal.classList.remove('active');
        });

// Close on escape
        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape') searchModal.classList.remove('active');
        });

// Mobile Menu Toggle
        mobileHam.addEventListener('click', () => {
            navWrap.classList.toggle('menu-open');
        });
    </script>

</body>
</html>