Improve how Navigation CSS manages the Top Bar visibility

Would be great to grant credit in this issue to all the people who worked on the original one and helped to disclose the top bar visibility issues and fix them.
However I'm not allowed to grant credit by myself, I would ask core committers to add credits on my behalf, specially to joaopauloc.dev.

Improving Navigation CSS for Better Top Bar Visibility
Enhancing CSS navigation to manage the Top Bar visibility ensures a smooth user experience by keeping the navigation accessible while minimizing distractions. The latest techniques help create a dynamic, user-friendly interface.

Key Techniques for Improving Top Bar Visibility in CSS
✅ 1. Sticky Navigation for Persistent Visibility
Use position: sticky; to keep the Top Bar in view while scrolling, allowing easy access to navigation elements.

.top-bar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

2. Auto-Hide Navigation on Scroll for a Cleaner UI
For a modern approach, use JavaScript and CSS to hide the Top Bar when scrolling down and show it when scrolling up.

.top-bar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #333;
    transition: top 0.3s ease-in-out;
}

.hidden {
    top: -60px; /* Adjust based on your top bar height */
}

let prevScroll = window.pageYOffset;

window.addEventListener("scroll", function () {
    let currentScroll = window.pageYOffset;
    let topBar = document.querySelector(".top-bar");

    if (prevScroll > currentScroll) {
        topBar.classList.remove("hidden"); // Show Top Bar
    } else {
        topBar.classList.add("hidden"); // Hide Top Bar
    }
    prevScroll = currentScroll;
});

a href="https://frpbypse.com/"> bypass</a>

this is helpful toturial

+++ for initiative! that CSS logic is much better than original one. Better to check presence of elements and not :empty()

ckrina → credited bronzehedwick → .

ckrina → credited joaopauloc.dev → .

ckrina → credited smustgrave → .

ckrina → credited trackleft2 → .

Added credits to @joaopauloc.dev and @finnsky and the rest of people who worked there for the worked in 📌 Integrate Navigation with Contextual editing Active .

Taken the CSS bits from the mentioned issue. Ready for review.

Yes, this is a more accurate way of determining child nodes. + 1 to RTBC
Thank you!

Could we flesh out some steps to reproduce in the issue summary to illustrate the problem that we're trying to address?

Per #14