CSS scroll-padding-top Property - Playground Example

<!DOCTYPE html><html><head><style type="text/css">/* Basic reset and layout */
* {
  box-sizing: border-box;
}

/* Apply smooth scrolling and reserve space at the top for the fixed header */
html {
  scroll-behavior: smooth;
  /* Ensure anchored targets are offset by the header height */
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: #111;
}

/* Fixed header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #0b5cff;
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 18px;
  z-index: 1000;
}

.site-header nav a {
  color: #fff;
  text-decoration: none;
  margin-right: 14px;
  padding: 6px 10px;
  border-radius: 6px;
  font-weight: 600;
}

.site-header nav a:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Main content: add top padding so content isn't hidden behind the header */
.content {
  padding-top: 84px; /* a little more than header height to add breathing room */
}

section {
  min-height: 70vh;
  padding: 28px 20px;
  border-bottom: 1px solid #e6e6e6;
  background: #fff;
}

section:nth-of-type(odd) {
  background: #fbfdff;
}

section h2 {
  margin-top: 0;
  margin-bottom: 12px;
}

section p {
  margin: 0;
  line-height: 1.5;
  color: #333;
}</style></head><body><header class="site-header">
    <nav>
      <a href="#section1">Section 1</a>
      <a href="#section2">Section 2</a>
      <a href="#section3">Section 3</a>
    </nav>
  </header>

  <main class="content">
    <section id="section1">
      <h2>Section 1</h2>
      <p>This is the first section. Click the nav links to jump to sections while accounting for the fixed header using scroll-padding-top.</p>
    </section>

    <section id="section2">
      <h2>Section 2</h2>
      <p>This is the second section. The browser will offset the scrolled position so the heading is not hidden behind the fixed header.</p>
    </section>

    <section id="section3">
      <h2>Section 3</h2>
      <p>This is the third section. Try resizing the window or using keyboard navigation to observe smooth scrolling with the offset.</p>
    </section>
  </main></body></html>