@layer components {
  .site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    flex-shrink: 0;
    align-self: flex-start;
    width: 100%;
    overflow: visible;
    background-color: transparent;
    border-block-end: 1px solid transparent;
  }
  /* Frost on a sibling layer. backdrop-filter/filter/transform on the
     header itself would become a containing block and trap the fixed sheet. */
  .site-header::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-color: transparent;
    border-block-end: 1px solid transparent;
    transition: background-color var(--duration-normal) var(--ease-out), border-color var(--duration-normal) var(--ease-out), backdrop-filter var(--duration-normal) var(--ease-out);
  }
  .site-header .container {
    max-width: none;
    width: 100%;
    overflow: visible;
    padding-inline: clamp(1.25rem, 3.5vw, 3.5rem);
  }
  .site-header.is-scrolled::before {
    background-color: var(--color-canvas-translucent);
    backdrop-filter: blur(var(--header-blur));
    -webkit-backdrop-filter: blur(var(--header-blur));
    border-block-end-color: var(--color-glass-border-soft);
  }
  .site-header__inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    min-height: var(--header-height);
    padding-block: var(--space-2);
    overflow: visible;
  }
  .site-header[data-nav-mode="pill"] .site-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-3);
  }
  .site-header[data-nav-mode="pill"] .logo {
    grid-column: 1;
    justify-self: start;
  }
  .site-header[data-nav-mode="pill"] .nav {
    grid-column: 2;
    justify-self: center;
  }
  .site-header[data-nav-mode="pill"] .site-header__actions {
    grid-column: 3;
    justify-self: end;
  }
  .logo {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: var(--space-0);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-bold);
    font-style: italic;
    letter-spacing: var(--letter-spacing-tight);
    color: var(--color-ink);
    text-decoration: none;
  }
  @media (min-width: 768px) {
    .logo {
      font-size: var(--text-xl);
    }
  }
  @media (min-width: 1024px) {
    .logo {
      font-size: var(--text-2xl);
    }
  }
  @media (hover: hover) and (pointer: fine) {
    .logo:hover {
      filter: brightness(0.7);
    }
  }
  .nav {
    display: none;
  }
  .site-header[data-nav-mode="pill"] .nav {
    position: relative;
    display: flex;
    align-items: center;
    justify-self: center;
    max-width: 100%;
    gap: 0.25rem;
    padding: 0.4rem 0.45rem;
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    background: var(--header-glass-fill);
    box-shadow: var(--header-glass-shadow);
    backdrop-filter: blur(var(--header-glass-blur)) saturate(var(--header-glass-saturate));
    -webkit-backdrop-filter: blur(var(--header-glass-blur)) saturate(var(--header-glass-saturate));
    overflow: hidden;
  }
  .nav__indicator {
    position: absolute;
    top: 0.4rem;
    bottom: 0.4rem;
    left: 0;
    z-index: 0;
    width: 0;
    height: auto;
    border-radius: var(--radius-full);
    background: var(--header-glass-indicator);
    opacity: 0;
    pointer-events: none;
    will-change: transform, width;
  }
  .nav__link {
    position: relative;
    z-index: 1;
    padding: 0.5rem 0.75rem;
    color: color-mix(in srgb, var(--color-ink) 55%, transparent);
    text-decoration: none;
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wide);
    border-radius: var(--radius-full);
    white-space: nowrap;
    transition: color var(--duration-fast);
  }
  @media (min-width: 900px) {
    .nav__link {
      padding: 0.5rem 1rem;
      font-size: 0.75rem;
    }
  }
  @media (min-width: 1024px) {
    .nav__link {
      padding: 0.55rem 1.2rem;
      font-size: 0.8125rem;
    }
  }
  @media (hover: hover) and (pointer: fine) {
    .nav__link:hover {
      color: var(--color-ink);
      text-decoration: none;
    }
  }
  .nav__link.is-active {
    color: var(--color-ink);
  }
  .site-header__actions {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-inline-start: auto;
  }
  .site-header[data-nav-mode="pill"] .site-header__actions {
    margin-inline-start: 0;
  }
  .site-header__desktop-tools {
    display: none;
  }
  .site-header[data-nav-mode="pill"] .site-header__desktop-tools {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }
  @media (min-width: 1024px) {
    .site-header[data-nav-mode="pill"] .site-header__desktop-tools {
      gap: var(--space-2);
    }
  }
  .site-header__start {
    position: relative;
    z-index: 1;
    flex: 0 0 auto;
    white-space: nowrap;
  }
  .site-header:not([data-nav-mode="pill"]) .site-header__start {
    --btn-padding-block: 0.45em;
    --btn-padding-inline: 0.75em;
    font-size: var(--text-xs);
  }
  .site-header__login {
    display: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    color: color-mix(in srgb, var(--color-ink) 80%, transparent);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    transition: color var(--duration-fast);
    white-space: nowrap;
  }
  .site-header[data-nav-mode="pill"] .site-header__login {
    display: inline;
  }
  @media (hover: hover) and (pointer: fine) {
    .site-header__login:hover {
      color: var(--color-ink);
    }
  }
  /* Language Switcher */
  .language-switcher {
    position: relative;
  }
  .language-switcher__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    box-sizing: border-box;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-ink-subtle);
    background: transparent;
    cursor: pointer;
    transition: border-color var(--duration-fast), color var(--duration-fast);
  }
  .language-switcher__globe {
    display: block;
    flex: none;
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
  }
  .language-switcher__label,
  .language-switcher__caret {
    display: none;
  }
  @media (min-width: 1024px) {
    .language-switcher__toggle {
      width: auto;
      height: auto;
      padding: var(--space-2) var(--space-3);
      justify-content: flex-start;
    }
    .language-switcher__label,
    .language-switcher__caret {
      display: inline;
    }
  }
  .site-header[data-lang-compact] .language-switcher__toggle {
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    justify-content: center;
  }
  .site-header[data-lang-compact] .language-switcher__label,
  .site-header[data-lang-compact] .language-switcher__caret {
    display: none;
  }
  @media (hover: hover) and (pointer: fine) {
    .language-switcher__toggle:hover {
      border-color: var(--color-border-subtle);
      color: var(--color-ink);
    }
  }
  .language-switcher__dropdown {
    position: absolute;
    z-index: var(--z-dropdown);
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 11rem;
    padding: var(--space-2);
    background-color: var(--color-canvas);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out), visibility var(--duration-fast);
  }
  .language-switcher__dropdown::before {
    content: "";
    position: absolute;
    top: calc(-1 * var(--space-2));
    left: 0;
    right: 0;
    height: var(--space-2);
  }
  .language-switcher:focus-within .language-switcher__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  @media (hover: hover) and (pointer: fine) {
    .language-switcher:hover .language-switcher__dropdown {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
  }
  .language-switcher__option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-ink-subtle);
    text-decoration: none;
    white-space: nowrap;
    border-radius: var(--radius-md);
    transition: background-color var(--duration-fast), color var(--duration-fast);
    -webkit-tap-highlight-color: transparent;
    filter: none;
  }
  .language-switcher__option:active {
    background-color: var(--color-canvas-alt);
    color: var(--color-ink);
    filter: none;
  }
  @media (hover: hover) and (pointer: fine) {
    .language-switcher__option:hover {
      background-color: var(--color-canvas-alt);
      color: var(--color-ink);
      filter: none;
    }
  }
  .language-switcher__option.is-active {
    color: var(--color-ink);
    font-weight: var(--font-weight-medium);
  }
  .language-switcher__code {
    color: var(--color-ink-muted);
    font-weight: var(--font-weight-normal);
  }
  /* Circular glass hamburger · morphs to X in place */
  .menu-toggle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    color: var(--color-ink);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    background: var(--header-glass-fill);
    box-shadow: var(--header-glass-shadow);
    backdrop-filter: blur(var(--header-glass-blur)) saturate(var(--header-glass-saturate));
    -webkit-backdrop-filter: blur(var(--header-glass-blur)) saturate(var(--header-glass-saturate));
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    z-index: 3;
  }
  .site-header[data-nav-mode="pill"] .menu-toggle {
    display: none;
  }
  .menu-toggle__bars {
    position: relative;
    display: block;
    width: 1.05rem;
    height: 0.75rem;
  }
  .menu-toggle__bars i {
    position: absolute;
    left: 0;
    right: 0;
    height: 1.5px;
    border-radius: var(--radius-full);
    background: currentColor;
    transition:
      transform 0.28s var(--ease-out),
      opacity var(--duration-fast),
      top 0.28s var(--ease-out);
  }
  .menu-toggle__bars i:nth-child(1) {
    top: 0;
  }
  .menu-toggle__bars i:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
  }
  .menu-toggle__bars i:nth-child(3) {
    top: 100%;
    transform: translateY(-100%);
  }
  .menu-toggle.is-open .menu-toggle__bars i:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }
  .menu-toggle.is-open .menu-toggle__bars i:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.is-open .menu-toggle__bars i:nth-child(3) {
    top: 50%;
    transform: translateY(-50%) rotate(-45deg);
  }
  @media (prefers-reduced-motion: reduce) {
    .menu-toggle__bars i {
      transition: none;
    }
  }
  /* Sheet is a sibling of the sticky bar, not a child: a 100vh descendant
     plus overflow-x clip on the root is what made the bar vanish after scroll.
     z-index sits under --z-header so the X stays tappable. */
  .mobile-nav-scrim {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-header) - 1);
    padding: var(--space-3) var(--space-4) var(--space-6);
    padding-top: var(--header-sheet-pad-top);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  html:not(.js-motion) .mobile-nav-scrim[data-open="true"] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  html:not(.js-motion) .mobile-nav-scrim[data-open="true"] .mobile-nav-panel {
    opacity: 1;
    transform: none;
  }
  .site-header[data-nav-mode="pill"] + .mobile-nav-scrim {
    display: none;
  }
  .mobile-nav-backdrop {
    position: absolute;
    inset: 0;
    z-index: 0;
    border: 0;
    padding: 0;
    margin: 0;
    cursor: pointer;
    background:
      radial-gradient(ellipse 80% 50% at 50% 0%, var(--color-scrim-soft), transparent 55%),
      var(--color-scrim-soft);
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
  }
  .mobile-nav-panel {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 24rem;
    margin-inline: auto;
    padding: var(--space-5) var(--space-5) var(--space-6);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--header-sheet-radius);
    background: var(--header-glass-sheet);
    box-shadow: var(--header-sheet-shadow);
    backdrop-filter: blur(32px) saturate(var(--header-glass-saturate));
    -webkit-backdrop-filter: blur(32px) saturate(var(--header-glass-saturate));
    opacity: 0;
    transform: translateY(-0.75rem) scale(0.96);
    will-change: transform, opacity;
  }
  html:not(.js-motion) .mobile-nav-scrim,
  html:not(.js-motion) .mobile-nav-panel {
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out), visibility var(--duration-slow);
  }
  @media (prefers-reduced-motion: reduce) {
    html:not(.js-motion) .mobile-nav-scrim,
    html:not(.js-motion) .mobile-nav-panel {
      transition: none;
    }
  }
  .mobile-nav-panel__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }
  .mobile-nav-panel__link {
    display: flex;
    align-items: center;
    min-height: 2.75rem;
    padding: 0.7rem 0.85rem;
    border-radius: 0.85rem;
    font-size: 1.05rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-tight);
    color: color-mix(in srgb, var(--color-ink) 78%, transparent);
    text-decoration: none;
    transition: background-color var(--duration-fast), color var(--duration-fast);
  }
  @media (hover: hover) and (pointer: fine) {
    .mobile-nav-panel__link:hover {
      background: var(--color-glass-soft);
      color: var(--color-ink);
    }
  }
  .mobile-nav-panel__link:focus-visible {
    background: var(--color-glass-soft);
    color: var(--color-ink);
    outline: none;
  }
  .mobile-nav-panel__link.is-active {
    background: var(--color-accent-muted);
    color: var(--color-ink);
  }
  .mobile-nav-panel__ctas {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-3);
    margin-block-start: var(--space-5);
    padding-block-start: var(--space-5);
    border-block-start: 1px solid var(--color-glass-border);
  }
  .mobile-nav-panel__login,
  .mobile-nav-panel__start {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
  }
  .mobile-nav-panel__login {
    color: var(--color-ink);
    background: var(--color-glass-soft);
    border: 1px solid var(--color-glass-border);
  }
  .mobile-nav-panel__start {
    color: var(--color-ink-inverted);
    background: var(--color-accent);
    box-shadow: 0 8px 20px color-mix(in srgb, var(--color-accent) 35%, transparent);
  }
  .mobile-nav-panel__lang {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-block-start: var(--space-5);
    padding-block-start: var(--space-5);
    border-block-start: 1px solid var(--color-glass-border);
  }
  .mobile-nav-panel__lang-link {
    font-size: var(--text-sm);
    color: var(--color-ink-subtle);
    text-decoration: none;
  }
  @media (hover: hover) and (pointer: fine) {
    .mobile-nav-panel__lang-link:hover {
      color: var(--color-ink);
    }
  }
  .mobile-nav-panel__lang-link.is-active {
    color: var(--color-ink);
    font-weight: var(--font-weight-medium);
  }
}