/* Canonical desktop site header. Load after page themes.
   The two existing mobile controllers retain their own markup and behavior.
   Header-only tokens prevent document/body themes from changing navigation. */
:root {
  --vp-header-font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --vp-header-font-size: 13px;
  --vp-header-font-weight: 500;
  --vp-header-line-height: 20px;
  --vp-header-brand-font-size: 20px;
  --vp-header-brand-font-weight: 800;
  --vp-header-brand-letter-spacing: -0.4px;
  --vp-header-height: 68px;
  --vp-header-max-width: 1360px;
  --vp-header-gutter: 28px;
  --vp-header-column-gap: 24px;
  --vp-header-brand-column: 148px;
  --vp-header-action-column: 176px;
  --vp-header-contact-width: 72px;
  --vp-header-brand-gap: 10px;
  --vp-header-logo-size: 34px;
  --vp-header-mark-size: 26px;
  --vp-header-logo-radius: 8px;
  --vp-header-link-gap: 2px;
  --vp-header-link-padding-x: 6px;
  --vp-header-link-padding-y: 8px;
  --vp-header-link-radius: 6px;
  --vp-header-control-height: 36px;
  --vp-header-background: rgba(7, 11, 20, 0.96);
  --vp-header-border: rgba(255, 255, 255, 0.08);
  --vp-header-text: #bac5d7;
  --vp-header-active-text: #7dd3fc;
  --vp-header-active-background: rgba(56, 189, 248, 0.08);
  --vp-header-hover-background: rgba(255, 255, 255, 0.06);
  --vp-header-brand-gradient: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --vp-header-logo-background: #fff;
  --vp-header-logo-border: rgba(99, 102, 241, 0.4);
  --vp-header-logo-shadow: 0 0 16px rgba(59, 130, 246, 0.35);
  --vp-header-focus: #7dd3fc;
  --vp-header-z-index: 100;
  --vp-header-content-gap: 24px;
}

/* This action occupies the same desktop column as the marketing Contact link. */
.site-masthead[data-site-header] .site-actions { display: flex; align-items: center; }
@media screen and (max-width:1100px) {
  .site-masthead[data-site-header] .site-actions > a { display:none; }
}

/* Desktop starts above the existing document navigation's 1100px boundary.
   Custom properties cannot be used in media-query conditions. */
@media screen and (min-width: 1101px) {
  .navbar[data-site-header],
  .site-masthead[data-site-header] {
    box-sizing: border-box;
    position: fixed;
    inset: 0 0 auto;
    z-index: var(--vp-header-z-index);
    width: 100%;
    max-width: none;
    height: var(--vp-header-height);
    margin: 0;
    padding: 0;
    background: var(--vp-header-background);
    border: 0;
    border-bottom: 1px solid var(--vp-header-border);
    font-family: var(--vp-header-font-family);
    font-size: var(--vp-header-font-size);
    font-weight: var(--vp-header-font-weight);
    line-height: var(--vp-header-line-height);
    letter-spacing: normal;
    text-align: left;
    text-transform: none;
    -webkit-font-smoothing: antialiased;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
  }
  .navbar[data-site-header] *,
  .site-masthead[data-site-header] * { box-sizing: border-box; }

  .navbar[data-site-header] > .container,
  .site-masthead[data-site-header] > .site-masthead-inner {
    position: relative;
    display: grid;
    grid-template-columns: var(--vp-header-brand-column) minmax(0, 1fr) var(--vp-header-action-column);
    align-items: center;
    column-gap: var(--vp-header-column-gap);
    width: 100%;
    max-width: var(--vp-header-max-width);
    height: 100%;
    min-height: 0;
    margin: 0 auto;
    padding: 0 var(--vp-header-gutter);
  }
  .navbar[data-site-header] .nav-brand,
  .site-masthead[data-site-header] .site-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--vp-header-brand-gap);
    width: max-content;
    margin: 0;
    padding: 0;
    text-decoration: none;
    white-space: nowrap;
  }
  .navbar[data-site-header] .nav-brand-text,
  .site-masthead[data-site-header] .site-brand-name {
    font-family: var(--vp-header-font-family);
    font-size: var(--vp-header-brand-font-size);
    font-weight: var(--vp-header-brand-font-weight);
    line-height: var(--vp-header-line-height);
    letter-spacing: var(--vp-header-brand-letter-spacing);
    background: var(--vp-header-brand-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .navbar[data-site-header] .nav-logo-icon,
  .site-masthead[data-site-header] .site-brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: var(--vp-header-logo-size);
    height: var(--vp-header-logo-size);
    border: 1px solid var(--vp-header-logo-border);
    border-radius: var(--vp-header-logo-radius);
    background: var(--vp-header-logo-background);
    box-shadow: var(--vp-header-logo-shadow);
  }
  .navbar[data-site-header] .nav-logo-icon img,
  .site-masthead[data-site-header] .site-brand-icon img {
    display: block;
    width: var(--vp-header-mark-size);
    height: var(--vp-header-mark-size);
    object-fit: contain;
  }
  .navbar[data-site-header] .nav-menu,
  .site-masthead[data-site-header] .site-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    align-self: center;
    position: static;
    inset: auto;
    gap: var(--vp-header-link-gap);
    width: 100%;
    min-width: 0;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .navbar[data-site-header] .nav-menu > li { margin: 0; padding: 0; list-style: none; }
  .navbar[data-site-header] .nav-menu .nav-link,
  .site-masthead[data-site-header] .site-primary > a {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    height: var(--vp-header-control-height);
    margin: 0;
    padding: var(--vp-header-link-padding-y) var(--vp-header-link-padding-x);
    border: 0;
    border-radius: var(--vp-header-link-radius);
    color: var(--vp-header-text);
    background: transparent;
    font-family: var(--vp-header-font-family);
    font-size: var(--vp-header-font-size);
    font-weight: var(--vp-header-font-weight);
    line-height: var(--vp-header-line-height);
    letter-spacing: normal;
    text-decoration: none;
    white-space: nowrap;
  }
  .navbar[data-site-header] .nav-menu .nav-link:hover,
  .site-masthead[data-site-header] .site-primary > a:hover {
    color: #fff;
    background: var(--vp-header-hover-background);
  }
  .navbar[data-site-header] .nav-menu .nav-link[aria-current],
  .site-masthead[data-site-header] .site-primary > a[aria-current] {
    color: var(--vp-header-active-text);
    background: var(--vp-header-active-background);
  }
  .navbar[data-site-header] .nav-actions,
  .site-masthead[data-site-header] .site-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin: 0;
    padding: 0;
  }
  .navbar[data-site-header] .nav-actions > a,
  .site-masthead[data-site-header] .site-actions > a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--vp-header-contact-width);
    height: var(--vp-header-control-height);
    margin: 0;
    padding: 0;
    border: 1px solid var(--vp-header-border);
    border-radius: var(--vp-header-link-radius);
    background: var(--vp-header-hover-background);
    color: var(--vp-header-text);
    font-family: var(--vp-header-font-family);
    font-size: var(--vp-header-font-size);
    font-weight: var(--vp-header-font-weight);
    line-height: var(--vp-header-line-height);
    letter-spacing: normal;
    text-decoration: none;
    white-space: nowrap;
    box-shadow: none;
    transform: none;
  }
  .navbar[data-site-header] .nav-actions > a:hover,
  .site-masthead[data-site-header] .site-actions > a:hover { color: #fff; border-color: var(--vp-header-active-text); }
  .navbar[data-site-header] a:focus-visible,
  .site-masthead[data-site-header] a:focus-visible { outline: 3px solid var(--vp-header-focus); outline-offset: 3px; }
  .navbar[data-site-header] .nav-badge,
  .navbar[data-site-header] .mobile-toggle,
  .navbar[data-site-header] .nav-menu > .mobile-contact,
  .site-masthead[data-site-header] .site-mobile { display: none; }

  /* Marketing pages already reserve space for their fixed header in the hero.
     Document pages previously had an in-flow masthead, so reserve its row. */
  body.has-site-masthead { padding-top: var(--vp-header-height); }
  .has-site-masthead .layout > :is(aside, nav[aria-label="Step"]) {
    top: calc(var(--vp-header-height) + var(--vp-header-content-gap));
    max-height: calc(100vh - var(--vp-header-height) - 2 * var(--vp-header-content-gap));
    overflow-y: auto;
  }
  .has-site-masthead main[id],
  .has-site-masthead main [id] {
    scroll-margin-top: calc(var(--vp-header-height) + var(--vp-header-content-gap));
  }
  .has-site-masthead > :is(.skip, .skip-link):focus {
    position: fixed;
    z-index: calc(var(--vp-header-z-index) + 1);
  }
}

/* Bring marketing's existing button/menu behavior to the shared collapse
   boundary without replacing its controller or the document details widget. */
@media screen and (min-width: 1025px) and (max-width: 1100px) {
  .navbar[data-site-header] .nav-badge,
  .navbar[data-site-header] .nav-actions > a { display: none; }
  .navbar[data-site-header] .nav-menu {
    display: none;
    position: absolute;
    top: var(--vp-header-height);
    left: 0;
    width: 100%;
    max-height: calc(100dvh - var(--vp-header-height));
    overflow-y: auto;
    flex-direction: column;
    gap: 8px;
    padding: 20px 24px;
    background: rgba(10, 15, 29, 0.98);
    border-bottom: 1px solid var(--vp-header-border);
  }
  .navbar[data-site-header] .nav-menu.open { display: flex; }
  .navbar[data-site-header] .nav-menu .mobile-contact { display: block; }
  .navbar[data-site-header] .nav-menu .nav-link { padding: 10px 14px; font-size: 15px; }
  .navbar[data-site-header] .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--vp-header-control-height);
    height: var(--vp-header-control-height);
    border: 1px solid var(--vp-header-border);
    border-radius: var(--vp-header-logo-radius);
    background: var(--vp-header-hover-background);
    color: #fff;
    font-size: 20px;
    cursor: pointer;
  }
}