Scroll Header

<header class="kodza-scroll-header">
  <div class="kodza-scroll-header__bar">
    <a class="kodza-scroll-header__brand" href="#">
      <span class="kodza-scroll-header__mark" aria-hidden="true"><svg viewBox="0 0 16 16"><path d="M5 3v10M11.5 3 6.5 8l5 5"/></svg></span>
      kodza
    </a>
    <nav class="kodza-scroll-header__nav" aria-label="Main">
      <a class="kodza-scroll-header__link" href="#" aria-current="page">Components</a>
      <a class="kodza-scroll-header__link" href="#">Docs</a>
      <a class="kodza-scroll-header__link" href="#">Changelog</a>
    </nav>
    <div class="kodza-scroll-header__actions">
      <a class="kodza-scroll-header__cta kodza-scroll-header__cta--quiet" href="#">Sign in</a>
      <a class="kodza-scroll-header__cta" href="#">Get started</a>
      <button class="kodza-scroll-header__burger" type="button" aria-expanded="false" aria-label="Menu"><span></span><span></span></button>
    </div>
  </div>
  <div class="kodza-scroll-header__panel">
    <div class="kodza-scroll-header__panel-in"></div>
  </div>
</header>

/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Scroll Header
   A floating glass pill for the top of a site. Clear over the top of the page, it turns to
   frosted glass as soon as you scroll, steps aside while you read down and comes back the
   moment you scroll up (or tab into it). It reads the room: over a section marked
   data-header-tone="dark" it turns to dark glass. Below 760px (or as soon as they no longer
   fit), the links and the actions' links fold into the pill behind a two-line button. Its
   height never changes, so nothing under it moves. A link marked aria-current (page, or the
   section in view) gets the soft pill. Any button can sit in the actions (--quiet for a
   second call to action); a filled logo goes in __mark--fill.
   Options, one class each: --keep (never hides), --solid (glass from the start).
   --kz-header-hide-after sets how far the page scrolls before it steps aside, and
   --kz-header-max-scrolled the width it narrows to with the glass. The script measures what the
   bar needs (--kz-header-content): line --kz-header-max up with your page's column and set
   --kz-header-max-scrolled: calc(var(--kz-header-content) + 48px), and the bar sits on the column
   at the top, then hugs its links once you scroll.
   Everything is tuned with the --kz-header-* variables. */
.kodza-scroll-header {
  --kz-header-fg: #0a0a0a;
  --kz-header-muted: rgba(10, 10, 10, 0.6);
  --kz-header-soft: rgba(10, 10, 10, 0.07);
  --kz-header-glass: rgba(255, 255, 255, 0.74);
  --kz-header-edge: rgba(10, 10, 10, 0.08);
  --kz-header-shadow: rgba(10, 10, 10, 0.08);
  --kz-header-ink: #0a0a0a;
  --kz-header-on-ink: #ffffff;
  --kz-header-dark-fg: rgba(255, 255, 255, 0.92);
  --kz-header-dark-muted: rgba(255, 255, 255, 0.62);
  --kz-header-dark-soft: rgba(255, 255, 255, 0.1);
  --kz-header-dark-glass: rgba(30, 30, 30, 0.72);
  --kz-header-dark-edge: rgba(255, 255, 255, 0.1);
  --kz-header-dark-shadow: rgba(0, 0, 0, 0.32);
  --kz-header-dark-ink: #ffffff;
  --kz-header-dark-on-ink: #0a0a0a;
  --kz-header-top: 12px;
  --kz-header-height: 60px;
  --kz-header-max: 1080px;
  --kz-header-max-scrolled: var(--kz-header-max);
  /* Set by the script while the links are on the bar: the width they need, logo and actions included */
  --kz-header-content: 100%;
  --kz-header-radius: 22px;
  --kz-header-duration: 0.5s;
  --kz-header-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --kz-header-hide-after: 600px;
  --kz-header-hide-duration: 0.8s;
  --kz-header-hide-ease: cubic-bezier(0.65, 0, 0.35, 1);
  --kz-header-width-duration: 0.7s;
  --kz-header-width-ease: cubic-bezier(0.65, 0, 0.35, 1);

  position: sticky;
  top: var(--kz-header-top);
  z-index: 50;
  width: min(var(--kz-header-max), calc(100% - 24px));
  margin: 0 auto;
  color: var(--kz-header-fg);
  transition:
    transform var(--kz-header-duration) var(--kz-header-ease),
    width var(--kz-header-width-duration) var(--kz-header-width-ease),
    color 0.35s ease;
}

/* With the glass, the pill narrows to --kz-header-max-scrolled (never wider than at the top) */
.kodza-scroll-header.is-scrolled,
.kodza-scroll-header.is-open,
.kodza-scroll-header--solid {
  width: min(var(--kz-header-max-scrolled), var(--kz-header-max), calc(100% - 24px));
}

/* Over a dark section: the same pill, in dark glass */
.kodza-scroll-header.is-dark {
  --kz-header-fg: var(--kz-header-dark-fg);
  --kz-header-muted: var(--kz-header-dark-muted);
  --kz-header-soft: var(--kz-header-dark-soft);
  --kz-header-glass: var(--kz-header-dark-glass);
  --kz-header-edge: var(--kz-header-dark-edge);
  --kz-header-shadow: var(--kz-header-dark-shadow);
  --kz-header-ink: var(--kz-header-dark-ink);
  --kz-header-on-ink: var(--kz-header-dark-on-ink);
}

/* Hidden while reading down (once the page has scrolled --kz-header-hide-after past it),
   shadow included. It leaves slowly and comes back quickly. */
.kodza-scroll-header.is-hidden {
  transform: translateY(calc(-100% - var(--kz-header-top) - 32px));
  transition:
    transform var(--kz-header-hide-duration) var(--kz-header-hide-ease),
    width var(--kz-header-width-duration) var(--kz-header-width-ease),
    color 0.35s ease;
}

/* The glass: clear at the top of the page, frosted once you scroll */
.kodza-scroll-header::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--kz-header-radius);
  background: var(--kz-header-glass);
  box-shadow: inset 0 0 0 1px var(--kz-header-edge), 0 10px 30px var(--kz-header-shadow);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  backdrop-filter: blur(20px) saturate(1.4);
  opacity: 0;
  transform: scale(0.97, 0.9);
  transition:
    opacity 0.4s ease,
    transform var(--kz-header-duration) var(--kz-header-ease),
    background-color 0.35s ease,
    box-shadow 0.35s ease;
  pointer-events: none;
}

.kodza-scroll-header.is-scrolled::before,
.kodza-scroll-header.is-open::before,
.kodza-scroll-header--solid::before {
  opacity: 1;
  transform: none;
}

.kodza-scroll-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--kz-header-height);
  padding: 0 10px 0 16px;
}

.kodza-scroll-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 8px;
  color: inherit;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.kodza-scroll-header__mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--kz-header-ink);
  color: var(--kz-header-on-ink);
  transition: background-color 0.35s ease, color 0.35s ease;
}

.kodza-scroll-header__mark svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* A filled logo of your own (an svg drawn with fill, not with a stroke) */
.kodza-scroll-header__mark--fill svg {
  fill: currentColor;
  stroke: none;
}

.kodza-scroll-header__nav {
  display: flex;
  gap: 2px;
  margin: 0 auto;
}

.kodza-scroll-header__link {
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--kz-header-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s ease, background-color 0.25s ease;
}

.kodza-scroll-header__link:hover {
  color: var(--kz-header-fg);
}

.kodza-scroll-header__link[aria-current]:not([aria-current="false"]) {
  background: var(--kz-header-soft);
  color: var(--kz-header-fg);
}

.kodza-scroll-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.kodza-scroll-header__cta {
  display: inline-grid;
  place-items: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--kz-header-ink);
  color: var(--kz-header-on-ink);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.35s ease, color 0.35s ease, opacity 0.25s ease;
}

.kodza-scroll-header__cta:hover {
  opacity: 0.85;
}

/* A second call to action, quieter */
.kodza-scroll-header__cta--quiet {
  background: var(--kz-header-soft);
  color: var(--kz-header-fg);
}

/* Two lines that cross into an X */
.kodza-scroll-header__burger {
  position: relative;
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--kz-header-soft);
  cursor: pointer;
}

.kodza-scroll-header__burger span {
  position: absolute;
  right: 12px;
  left: 12px;
  height: 1.6px;
  border-radius: 2px;
  background: var(--kz-header-fg);
  transition: transform 0.4s var(--kz-header-ease);
}

.kodza-scroll-header__burger span:first-child {
  top: 16px;
}

.kodza-scroll-header__burger span:last-child {
  top: 22px;
}

.kodza-scroll-header.is-open .kodza-scroll-header__burger span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.kodza-scroll-header.is-open .kodza-scroll-header__burger span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.kodza-scroll-header__brand:focus-visible,
.kodza-scroll-header__link:focus-visible,
.kodza-scroll-header__cta:focus-visible,
.kodza-scroll-header__burger:focus-visible,
.kodza-scroll-header__panel-link:focus-visible {
  outline: 2px solid var(--kz-header-fg);
  outline-offset: 3px;
}

/* The small-screen menu: the pill grows to show the links */
.kodza-scroll-header__panel {
  position: relative;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--kz-header-duration) var(--kz-header-ease);
}

.kodza-scroll-header.is-open .kodza-scroll-header__panel {
  grid-template-rows: 1fr;
}

.kodza-scroll-header__panel-in {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0 16px;
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear var(--kz-header-duration);
}

.kodza-scroll-header.is-open .kodza-scroll-header__panel-in {
  visibility: visible;
  transition-delay: 0s;
}

.kodza-scroll-header__panel-link {
  padding: 14px 2px;
  border-top: 1px solid var(--kz-header-soft);
  border-radius: 4px;
  color: inherit;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  text-decoration: none;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.3s ease;
}

.kodza-scroll-header.is-open .kodza-scroll-header__panel-link {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.4s ease calc(0.12s + var(--i, 0) * 50ms),
    transform 0.5s var(--kz-header-ease) calc(0.12s + var(--i, 0) * 50ms);
}

.kodza-scroll-header__panel-link:last-child {
  margin-bottom: 14px;
}

/* The point where the page starts to scroll under the header (added by the script) */
.kodza-scroll-header__sentinel {
  display: block;
  height: 1px;
  margin-bottom: -1px;
}

/* Folded: the links (and the actions' links) wait in the menu. Below 760px, or when the
   script finds they no longer fit on the bar */
@media (max-width: 760px) {
  .kodza-scroll-header__nav,
  .kodza-scroll-header__actions > a {
    display: none;
  }

  .kodza-scroll-header__actions {
    margin-left: auto;
  }

  .kodza-scroll-header__burger {
    display: block;
  }
}

.kodza-scroll-header.is-folded .kodza-scroll-header__nav,
.kodza-scroll-header.is-folded .kodza-scroll-header__actions > a {
  display: none;
}

.kodza-scroll-header.is-folded .kodza-scroll-header__actions {
  margin-left: auto;
}

.kodza-scroll-header.is-folded .kodza-scroll-header__burger {
  display: block;
}

@media (min-width: 761px) {
  .kodza-scroll-header:not(.is-folded) .kodza-scroll-header__panel {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-scroll-header,
  .kodza-scroll-header::before,
  .kodza-scroll-header__panel,
  .kodza-scroll-header__panel-link,
  .kodza-scroll-header__burger span {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* The dark glass follows the sections marked data-header-tone="dark". To retune it:
.kodza-scroll-header {
  --kz-header-dark-glass: rgba(20, 20, 20, 0.8);
  --kz-header-dark-ink: #f2f2f0;
}
*/

/* kodza-guard 1669807482c9 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-scroll-header__brand):not(#_),
:where(.kodza-scroll-header__cta):not(#_),
:where(.kodza-scroll-header__burger):not(#_) {
  outline: revert;
  outline-offset: revert;
}

:where(.kodza-scroll-header__link):not(#_) {
  outline: revert;
  background-color: revert;
  background-image: revert;
  outline-offset: revert;
}

:where(.kodza-scroll-header__panel-link):not(#_) {
  outline: revert;
  margin-bottom: revert;
  outline-offset: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-scroll-header:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header__bar:not(#_),
.kodza-scroll-header__mark:not(#_),
.kodza-scroll-header__actions:not(#_),
.kodza-scroll-header__panel:not(#_),
.kodza-scroll-header__panel-in:not(#_),
.kodza-scroll-header__burger span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-scroll-header__brand:not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-style: revert;
  line-height: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header__nav:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header__link:not(#_),
.kodza-scroll-header__cta:not(#_) {
  border: revert;
  margin: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header__burger:not(#_) {
  margin: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-scroll-header__panel-link:not(#_) {
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  margin-top: revert;
  margin-right: revert;
  margin-left: revert;
  border-right-width: revert;
  border-bottom-width: revert;
  border-left-width: revert;
  border-right-style: revert;
  border-bottom-style: revert;
  border-left-style: revert;
  border-right-color: revert;
  border-bottom-color: revert;
  border-left-color: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-style: revert;
  line-height: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header__mark svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-header:not(#_):where(:not([hidden])),
.kodza-scroll-header__link:not(#_):where(:not([hidden])),
.kodza-scroll-header__panel-link:not(#_):where(:not([hidden])),
.kodza-scroll-header__mark svg:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-scroll-header:not(#_):where([hidden]),
.kodza-scroll-header__link:not(#_):where([hidden]),
.kodza-scroll-header__panel-link:not(#_):where([hidden]),
.kodza-scroll-header__mark svg:where(:not([class*="kodza-"])):not(#_):where([hidden]) {
  display: none;
}

.kodza-scroll-header:not(#_)::before {
  box-sizing: revert;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-scroll-header:not(#_) {
  position: sticky;
  color: var(--kz-header-fg);
  transition: transform var(--kz-header-duration) var(--kz-header-ease),
    width var(--kz-header-width-duration) var(--kz-header-width-ease),
    color 0.35s ease;
}

.kodza-scroll-header:not(#_) {
  width: min(var(--kz-header-max), calc(100% - 24px));
}

.kodza-scroll-header.is-scrolled:not(#_),
.kodza-scroll-header.is-open:not(#_),
.kodza-scroll-header--solid:not(#_) {
  width: min(var(--kz-header-max-scrolled), var(--kz-header-max), calc(100% - 24px));
}

.kodza-scroll-header.is-hidden:not(#_) {
  transition: transform var(--kz-header-hide-duration) var(--kz-header-hide-ease),
    width var(--kz-header-width-duration) var(--kz-header-width-ease),
    color 0.35s ease;
}

.kodza-scroll-header__brand:not(#_) {
  display: inline-flex;
  border-radius: 8px;
  color: inherit;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.kodza-scroll-header__nav:not(#_) {
  display: flex;
  margin: 0 auto;
}

.kodza-scroll-header__link:not(#_) {
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--kz-header-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.25s ease, background-color 0.25s ease;
}

.kodza-scroll-header__link:hover:not(#_) {
  color: var(--kz-header-fg);
}

.kodza-scroll-header__link[aria-current]:not([aria-current="false"]):not(#_) {
  background: var(--kz-header-soft);
  color: var(--kz-header-fg);
}

.kodza-scroll-header__cta:not(#_) {
  display: inline-grid;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--kz-header-ink);
  color: var(--kz-header-on-ink);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.35s ease, color 0.35s ease, opacity 0.25s ease;
}

.kodza-scroll-header__cta--quiet:not(#_) {
  background: var(--kz-header-soft);
  color: var(--kz-header-fg);
}

.kodza-scroll-header__burger:not(#_) {
  position: relative;
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--kz-header-soft);
  cursor: pointer;
}

.kodza-scroll-header__brand:focus-visible:not(#_),
.kodza-scroll-header__link:focus-visible:not(#_),
.kodza-scroll-header__cta:focus-visible:not(#_),
.kodza-scroll-header__panel-link:focus-visible:not(#_) {
  outline: 2px solid var(--kz-header-fg);
  outline-offset: 3px;
}

.kodza-scroll-header__burger:focus-visible:not(#_) {
  outline: 2px solid var(--kz-header-fg);
  outline-offset: 3px;
}

.kodza-scroll-header__panel-link:not(#_) {
  padding: 14px 2px;
  border-top: 1px solid var(--kz-header-soft);
  border-radius: 4px;
  color: inherit;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.3s ease;
}

.kodza-scroll-header.is-open .kodza-scroll-header__panel-link:not(#_) {
  transition: opacity 0.4s ease calc(0.12s + var(--i, 0) * 50ms),
    transform 0.5s var(--kz-header-ease) calc(0.12s + var(--i, 0) * 50ms);
}

.kodza-scroll-header__panel-link:last-child:not(#_) {
  margin-bottom: 14px;
}

@media (max-width: 760px) {
  .kodza-scroll-header__nav:not(#_),
  .kodza-scroll-header__actions > a:not(#_) {
    display: none;
  }
}

@media (max-width: 760px) {
  .kodza-scroll-header__burger:not(#_) {
    display: block;
  }
}

.kodza-scroll-header.is-folded .kodza-scroll-header__nav:not(#_),
.kodza-scroll-header.is-folded .kodza-scroll-header__actions > a:not(#_) {
  display: none;
}

.kodza-scroll-header.is-folded .kodza-scroll-header__burger:not(#_) {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-scroll-header:not(#_),
  .kodza-scroll-header__panel-link:not(#_) {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Scroll Header
// Marks the header "is-scrolled" once the page scrolls under it (a 1px sentinel just above it
// tells), "is-hidden" while the visitor reads down (until they scroll up or tab into it), and
// "is-dark" over a section marked data-header-tone="dark". On small screens, or as soon as the
// links no longer fit on the bar ("is-folded"), they wait in the pill's menu (with the actions'
// links, copied as plain links) and the two-line button opens it. While the links are on the bar,
// it measures the width they need into --kz-header-content, for a pill that hugs them.
(() => {
  const SELECTOR = '.kodza-scroll-header';
  let uid = 0;

  // The tone of the section right under the header. Hidden, it is read where the header will
  // come back (stuck at the top), so it never returns in the tone of a section it left. While a
  // view transition draws over the page (a page transition), the point only reaches <html>: the
  // marked sections are then found by their boxes, the innermost one last
  const readTone = (root) => {
    const box = root.getBoundingClientRect();
    const bottom = root.classList.contains('is-hidden') ? (parseFloat(getComputedStyle(root).top) || 0) + root.offsetHeight : box.bottom;
    const x = box.left + box.width / 2;
    const y = Math.min(innerHeight - 1, Math.max(0, bottom - 6));
    const under = document.elementsFromPoint(x, y).find((el) => !root.contains(el));
    const zone = under && under !== document.documentElement
      ? under.closest('[data-header-tone]')
      : [...document.querySelectorAll('[data-header-tone]')].filter((el) => {
        const r = el.getBoundingClientRect();
        return !root.contains(el) && x >= r.left && x <= r.right && y >= r.top && y <= r.bottom;
      }).pop();
    root.classList.toggle('is-dark', (zone?.dataset.headerTone || root.dataset.tone) === 'dark');
  };

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const sentinel = document.createElement('span');
    sentinel.className = 'kodza-scroll-header__sentinel';
    sentinel.setAttribute('aria-hidden', 'true');
    root.before(sentinel);
    const observer = new IntersectionObserver(([entry]) => {
      const scrolled = !entry.isIntersecting && entry.boundingClientRect.top < 0;
      root.classList.toggle('is-scrolled', scrolled);
      if (!scrolled) root.classList.remove('is-hidden');
    });
    observer.observe(sentinel);
    signal.addEventListener('abort', () => {
      observer.disconnect();
      sentinel.remove();
    });
    root.addEventListener('focusin', () => root.classList.remove('is-hidden'), { signal });

    // The small-screen menu: the same links, bigger, and the actions' links last (any button
    // kind: only its address and its words are copied, without what is hidden from screen readers)
    const bar = root.querySelector('.kodza-scroll-header__bar');
    const burger = root.querySelector('.kodza-scroll-header__burger');
    const panel = root.querySelector('.kodza-scroll-header__panel-in');
    let fit;
    const words = (node) => [...node.childNodes].map((child) => {
      if (child.nodeType === Node.TEXT_NODE) return child.textContent;
      if (child.nodeType !== Node.ELEMENT_NODE || child.getAttribute('aria-hidden') === 'true') return '';
      return words(child);
    }).join('').replace(/\s+/g, ' ').trim();
    if (burger && panel) {
      const sources = [...root.querySelectorAll('.kodza-scroll-header__link, .kodza-scroll-header__actions a[href]')];
      panel.append(...sources.map((source, i) => {
        const link = document.createElement('a');
        link.className = 'kodza-scroll-header__panel-link';
        ['href', 'target', 'rel', 'aria-current'].forEach((name) => source.hasAttribute(name) && link.setAttribute(name, source.getAttribute(name)));
        link.textContent = source.getAttribute('aria-label') || words(source);
        link.style.setProperty('--i', i);
        return link;
      }));
      panel.id = `kodza-scroll-header-${++uid}`;
      burger.setAttribute('aria-controls', panel.id);
      const set = (open) => {
        root.classList.toggle('is-open', open);
        burger.setAttribute('aria-expanded', String(open));
        burger.setAttribute('aria-label', open ? 'Close the menu' : 'Menu');
      };
      burger.addEventListener('click', () => set(!root.classList.contains('is-open')), { signal });
      panel.addEventListener('click', (event) => event.target.closest('a') && set(false), { signal });
      root.addEventListener('keydown', (event) => {
        if (event.key === 'Escape' && root.classList.contains('is-open')) {
          set(false);
          burger.focus();
        }
      }, { signal });

      // Above 760px, fold only when the bar runs out of room (measured unfolded, in one frame)
      fit = () => {
        root.classList.remove('is-folded');
        const folded = innerWidth > 760 && bar.scrollWidth > bar.clientWidth + 1;
        root.classList.toggle('is-folded', folded);
        if (!folded && innerWidth > 760 && root.classList.contains('is-open')) set(false);
      };
    }

    // The width the bar's content needs (logo, links, actions, gaps and padding), for a pill that
    // hugs it. Folded, the menu needs the whole width: the variable goes back to 100%
    const hug = () => {
      if (!bar || burger?.offsetWidth) return root.style.removeProperty('--kz-header-content');
      const style = getComputedStyle(bar);
      const shown = [...bar.children].filter((child) => child.offsetWidth);
      const width = shown.reduce((sum, child) => sum + child.offsetWidth, 0) + Math.max(0, shown.length - 1) * (parseFloat(style.columnGap) || 0) + parseFloat(style.paddingLeft) + parseFloat(style.paddingRight);
      root.style.setProperty('--kz-header-content', `${Math.ceil(width)}px`);
    };
    if (bar) {
      const sizer = new ResizeObserver(() => {
        fit?.();
        hug();
      });
      [bar, ...bar.children].forEach((el) => sizer.observe(el));
      document.fonts?.ready.then(() => !signal.aborted && (fit?.(), hug()));
      signal.addEventListener('abort', () => sizer.disconnect());
    }

    let lastY = window.scrollY;
    let ticking = false;
    const update = () => {
      ticking = false;
      const y = window.scrollY;
      const delta = y - lastY;
      const locked = root.classList.contains('kodza-scroll-header--keep') || root.classList.contains('is-open') || root.contains(document.activeElement);
      if (Math.abs(delta) >= 6 && !locked) {
        // Only a header stuck at the top hides (measured on its container: the header itself
        // moves when hidden), and only once the page has scrolled --kz-header-hide-after past it
        const stuck = root.classList.contains('is-scrolled') && root.parentElement.getBoundingClientRect().bottom > root.offsetHeight;
        const far = sentinel.getBoundingClientRect().top < -(parseFloat(getComputedStyle(root).getPropertyValue('--kz-header-hide-after')) || 600);
        if (delta < 0 || !stuck) root.classList.remove('is-hidden');
        else if (far) root.classList.add('is-hidden');
      }
      readTone(root);
      if (Math.abs(delta) >= 6) lastY = y;
    };
    const queue = () => {
      if (!ticking) {
        ticking = true;
        requestAnimationFrame(update);
      }
    };
    window.addEventListener('scroll', queue, { passive: true, signal });
    window.addEventListener('resize', queue, { signal });
    readTone(root);
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load.
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const init = (scope) => find(scope).forEach((root) => {
    if (root.classList.contains('is-ready')) return; // already running, maybe from another copy of this script
    const controller = new AbortController();
    instances.set(root, { controller, html: root.innerHTML, attrs: [...root.attributes].map((a) => [a.name, a.value]) });
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.controller.abort();
    [...root.attributes].forEach((a) => root.removeAttribute(a.name));
    instance.attrs.forEach(([name, value]) => root.setAttribute(name, value));
    root.innerHTML = instance.html;
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();

'use client';
// Kodza — Scroll Header, for React. From https://kodza.dev/components/scroll-header/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: scroll-header.css and scroll-header.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './scroll-header.css';

type Variant = "keep" | "solid";

export type ScrollHeaderProps = Omit<ComponentPropsWithoutRef<'header'>, "children" | "variant" | "vars"> & {
  /** Modifier class(es): .kodza-scroll-header--keep, .kodza-scroll-header--solid */
  variant?: Variant | Variant[];
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #0a0a0a */
    "--kz-header-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-header-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.07) */
    "--kz-header-soft"?: string | number;
    /** default: rgba(255, 255, 255, 0.74) */
    "--kz-header-glass"?: string | number;
    /** default: rgba(10, 10, 10, 0.08) */
    "--kz-header-edge"?: string | number;
    /** default: rgba(10, 10, 10, 0.08) */
    "--kz-header-shadow"?: string | number;
    /** default: #0a0a0a */
    "--kz-header-ink"?: string | number;
    /** default: #ffffff */
    "--kz-header-on-ink"?: string | number;
    /** default: rgba(255, 255, 255, 0.92) */
    "--kz-header-dark-fg"?: string | number;
    /** default: rgba(255, 255, 255, 0.62) */
    "--kz-header-dark-muted"?: string | number;
    /** default: rgba(255, 255, 255, 0.1) */
    "--kz-header-dark-soft"?: string | number;
    /** default: rgba(30, 30, 30, 0.72) */
    "--kz-header-dark-glass"?: string | number;
    /** default: rgba(255, 255, 255, 0.1) */
    "--kz-header-dark-edge"?: string | number;
    /** default: rgba(0, 0, 0, 0.32) */
    "--kz-header-dark-shadow"?: string | number;
    /** default: #ffffff */
    "--kz-header-dark-ink"?: string | number;
    /** default: #0a0a0a */
    "--kz-header-dark-on-ink"?: string | number;
    /** default: 12px */
    "--kz-header-top"?: string | number;
    /** default: 60px */
    "--kz-header-height"?: string | number;
    /** default: 1080px */
    "--kz-header-max"?: string | number;
    /** default: var(--kz-header-max) */
    "--kz-header-max-scrolled"?: string | number;
    /** default: 22px */
    "--kz-header-radius"?: string | number;
    /** default: 0.5s */
    "--kz-header-duration"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-header-ease"?: string | number;
    /** default: 600px */
    "--kz-header-hide-after"?: string | number;
    /** default: 0.8s */
    "--kz-header-hide-duration"?: string | number;
    /** default: cubic-bezier(0.65, 0, 0.35, 1) */
    "--kz-header-hide-ease"?: string | number;
    /** default: 0.7s */
    "--kz-header-width-duration"?: string | number;
    /** default: cubic-bezier(0.65, 0, 0.35, 1) */
    "--kz-header-width-ease"?: string | number;
  };
  className?: string;
};

export function ScrollHeader({ variant, vars, className, style, ...rest }: ScrollHeaderProps) {
  const ref = useRef<ComponentRef<'header'>>(null);
  const classes = ["kodza-scroll-header", ...([] as string[]).concat(variant ?? []).map((v) => `kodza-scroll-header--${v}`), className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, vars, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./scroll-header.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  return (
    <header key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <div className="kodza-scroll-header__bar">
        <a className="kodza-scroll-header__brand" href="#"> <span className="kodza-scroll-header__mark" aria-hidden="true"> <svg viewBox="0 0 16 16"> <path d="M5 3v10M11.5 3 6.5 8l5 5" /> </svg> </span> kodza </a>
        <nav className="kodza-scroll-header__nav" aria-label="Main">
          <a className="kodza-scroll-header__link" href="#" aria-current="page">Components</a>
          {' '}
          <a className="kodza-scroll-header__link" href="#">Docs</a>
          {' '}
          <a className="kodza-scroll-header__link" href="#">Changelog</a>
        </nav>
        <div className="kodza-scroll-header__actions">
          <a className="kodza-scroll-header__cta kodza-scroll-header__cta--quiet" href="#">Sign in</a>
          {' '}
          <a className="kodza-scroll-header__cta" href="#">Get started</a>
          {' '}
          <button className="kodza-scroll-header__burger" type="button" aria-expanded="false" aria-label="Menu">
            <span />
            <span />
          </button>
        </div>
      </div>
      <div className="kodza-scroll-header__panel">
        <div className="kodza-scroll-header__panel-in" />
      </div>
    </header>
  );
}