<header id="mainHeader" class="sticky-header">
<div class="logo">Brand</div>
<nav>
<a href="#">Home</a>
<a href="#">About</a>
<a href="#">Contact</a>
</nav>
</header>
<main class="content">
<h1>Scroll Down</h1>
<p>The header will disappear to give you more reading space.</p>
<p>Scroll back up to see it return.</p>
<!-- Spacer for scrolling -->
<div style="height: 1500px"></div>
</main>
.sticky-header {
font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
position: fixed;
top: 0;
left: 0;
width: 100%;
background: #ffffff;
padding: 15px 30px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
display: flex;
justify-content: space-between;
align-items: center;
transition: transform 0.3s ease;
z-index: 1000;
box-sizing: border-box;
}
.sticky-header.hide {
transform: translateY(-100%);
}
.logo {
font-weight: 800;
font-size: 1.5rem;
color: #1f2937;
}
nav a {
text-decoration: none;
color: #4b5563;
margin-left: 20px;
font-weight: 500;
transition: color 0.2s;
}
nav a:hover {
color: #2563eb;
}
.content {
padding-top: 100px;
padding-left: 30px;
font-family: system-ui, "Segoe UI", Roboto, sans-serif;
}
let lastScrollTop = 0;
const header = document.getElementById("mainHeader");
window.addEventListener("scroll", () => {
const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
if (scrollTop > lastScrollTop) {
// Scroll Down
header.classList.add("hide");
} else {
// Scroll Up
header.classList.remove("hide");
}
lastScrollTop = scrollTop <= 0 ? 0 : scrollTop;
});
