/* ==========================================================================
   AiVRIC nav — the full-width bar (docs/design-notes.md)
   Loads after styles.css and overrides it. Two states:

     solid  the default, and what every page without a hero gets. Today's
            appearance, minus the utility strip that used to sit above it.
     over   transparent, light ink, sitting on top of a dark hero. A page
            opts in with data-nav="over" on <body>; cvh.js drops back to
            solid once the hero has scrolled away.

   Because it is the site-wide header now, the solid state has to stand on
   its own — check-nav.mjs fails the build if it ever goes unreadable.
   ========================================================================== */

.site-header {
  --nav-ink: #f2f7fb;
  --nav-ink-dim: rgba(242, 247, 251, 0.74);
  --nav-frost: rgba(255, 255, 255, 0.15);
  --nav-frost-line: rgba(255, 255, 255, 0.28);
  transition:
    background 0.35s ease,
    border-color 0.35s ease,
    backdrop-filter 0.35s ease;
}

/* --- geometry, both states ------------------------------------------------
   Nav items become pills rather than bare text, so the hover state has a
   shape to fill. Applied in both states so nothing shifts when they swap. */
.site-header :is(.nav-link, .nav-trigger) {
  padding: 9px 14px;
  border-radius: 40px;
  white-space: nowrap;
  transition:
    background 0.18s ease,
    color 0.18s ease;
}
.site-header .theme-toggle-label {
  white-space: nowrap;
}

/* Dropping the utility strip and the Contact item freed enough room to keep the full
   label down to 1200px — styles.css swapped it for "Guided Tour" below 1500. */
@media (min-width: 1200px) {
  .site-header .nav-experience-long { display: inline; }
  .site-header .nav-experience-short { display: none; }
}
.site-header :is(.nav-link, .nav-trigger):hover {
  background: color-mix(in srgb, currentColor 10%, transparent);
}
.site-header .nav-login {
  padding: 9px 14px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  color: inherit;
  white-space: nowrap;
  transition: background 0.18s ease;
}
.site-header .nav-login:hover {
  background: color-mix(in srgb, currentColor 10%, transparent);
}
/* Keyboard focus. The site's focus ring is scoped inside .cvh-page and the header sits
   outside it, so without this the bar has no visible focus at all. currentColor tracks
   whichever state the bar is in, light or dark. */
.site-header :is(a, button):focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 2px;
  border-radius: 40px;
}

.site-header .header-actions {
  gap: 10px;
  flex: none;
}
/* the logo must never be the thing that gives way when the row is tight */
.site-header .brand {
  flex: none;
}
/* the items carry their own padding now, so the old gap between them is doubled-up space */
.site-header .nav-list {
  gap: 2px;
}
.site-header .site-nav {
  flex: 0 1 auto;
  min-width: 0;
}
/* a full-width bar that runs edge to edge */
.site-header .header-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  width: 100%;
  max-width: none;
  margin-inline: 0;
  box-sizing: border-box;
  column-gap: 11px;
  padding-inline: clamp(16px, 2vw, 24px);
  padding-block: 12px;
}
.site-header .header-brand-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  justify-self: start;
}
.site-header .header-brand-cluster .brand { margin: 0; }
.site-header .site-nav {
  justify-self: center;
  min-width: 0;
}
.site-header .nav-list { justify-content: center; }
.site-header .header-actions {
  justify-self: end;
  margin-left: 0;
}

/* chevrons on menu items; Pricing is a plain link and gets none. */
.site-header .nav-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.site-header .nav-trigger::before {
  content: "";
  order: 2;
  width: 6px;
  height: 6px;
  flex: none;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.18s ease;
}
.site-header .nav-item.is-open .nav-trigger::before {
  transform: rotate(225deg) translate(-1px, -1px);
}

/* The compact desktop band keeps the primary links centered without crowding
   the brand pill or the actions on either side. */
@media (max-width: 1399px) {
  .site-header .theme-toggle-label {
    display: none;
  }
  .site-header .theme-toggle {
    padding: 6px 8px;
  }
  .site-header .header-inner {
    column-gap: 8px;
  }
  .site-header .nav-list {
    font-size: 13px;
  }
  .site-header :is(.nav-link, .nav-trigger, .nav-login) {
    padding-inline: 5px;
  }
  .site-header .nav-link-experience { padding-inline: 7px; }
  .site-header .header-actions { gap: 6px; }
  .site-header .nav-cta { padding-inline: 12px; font-size: 13px; }
}
/* the underline still marks the current page; it just no longer doubles as hover */
.site-header .nav-link[aria-current="page"]::after,
.site-header .nav-item.is-open .nav-trigger::after,
.site-header .nav-item.is-active .nav-trigger::after {
  margin-top: 2px;
}
.site-header .nav-item.is-open .nav-trigger::after,
.site-header .nav-item.is-active .nav-trigger::after {
  content: none;
}
.site-header .nav-item.is-open .nav-trigger,
.site-header .nav-item.is-active .nav-trigger {
  box-shadow: inset 0 -2px 0 var(--link);
}

@media (max-width: 1279px) {
  .site-header .header-inner {
    display: flex;
    justify-content: space-between;
  }
  .site-header .site-nav,
  .site-header .header-actions {
    display: none;
  }
  .site-header .header-brand-cluster .nav-link-experience {
    display: none;
  }
  .site-header .menu-toggle {
    display: flex;
    margin-left: auto;
  }
}
@media (min-width: 768px) and (max-width: 1279px) {
  .site-header .header-brand-cluster .nav-link-experience {
    display: inline-flex;
  }
}

/* ==========================================================================
   OVER — transparent, on a hero
   ========================================================================== */

/* The bar floats over the hero image stage without consuming part of its native frame.
   Sticky would occupy a strip above the image and push it down. */
body[data-nav="over"] .site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}
body[data-nav="over"] .cvh-page {
  --cvh-header: 0px;
}

body[data-nav="over"]:not(.is-nav-solid) .site-header {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom-color: transparent;
  color: var(--nav-ink);
}

/* .nav-link and .nav-trigger are `color: inherit`, but they inherit from .nav-list, which
   sets its own --ink-muted (styles.css:873) — so the colour has to go there. They are also
   coloured directly under [data-theme="dark"] (styles.css:4765), and a direct rule beats an
   inherited one however specific the ancestor is, so they are named here as well. */
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-list,
body[data-nav="over"]:not(.is-nav-solid) .site-header :is(.nav-link, .nav-trigger, .nav-login, .brand) {
  color: var(--nav-ink);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header :is(.nav-link, .nav-trigger):hover,
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-login:hover {
  background: var(--nav-frost);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-item.is-open .nav-trigger {
  background: var(--nav-frost);
  color: var(--nav-ink);
}

/* The supplied PNG is white artwork on transparency. Keep its pixels untouched and
   recolor only the header instance on light surfaces; the asset remains white over
   the hero and on dark surfaces. */
.brand-mark-2026 {
  display: block;
  filter: brightness(0) saturate(100%) invert(8%) sepia(21%) saturate(3255%) hue-rotate(177deg) brightness(98%) contrast(96%);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .brand-mark-2026,
[data-theme="dark"] .brand-mark-2026 {
  filter: none;
}

/* the tour pill: frosted rather than outlined */
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-link-experience {
  background: var(--nav-frost);
  border-color: var(--nav-frost-line);
  color: var(--nav-ink);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-link-experience:hover {
  background: rgba(255, 255, 255, 0.24);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .nav-badge {
  background: var(--nav-ink);
  color: #0b2138;
}

/* the dark-mode toggle, frosted to match */
body[data-nav="over"]:not(.is-nav-solid) .site-header .theme-toggle {
  background: var(--nav-frost);
  border-color: var(--nav-frost-line);
  color: var(--nav-ink-dim);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .theme-toggle:hover {
  color: var(--nav-ink);
  border-color: rgba(255, 255, 255, 0.45);
  box-shadow: none;
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .theme-toggle-track {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
}
body[data-nav="over"]:not(.is-nav-solid) .site-header .theme-toggle-thumb {
  background: var(--nav-ink);
}

/* the hamburger's three bars are background-coloured spans */
body[data-nav="over"]:not(.is-nav-solid) .site-header .menu-toggle span {
  background: var(--nav-ink);
}

/* Dropdown panels keep their own surface and their own ink — they must not
   inherit the light nav colour, or their headings vanish on white. */
.site-header .dropdown,
.site-header .mega-menu {
  color: var(--ink-strong);
}

/* ==========================================================================
   SOLID — the default everywhere else, and past the hero here
   Inherited from styles.css; this only restores what the over state changed
   and keeps the transition honest.
   ========================================================================== */

body.is-nav-solid .site-header {
  background: var(--surface-0);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border-subtle);
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-header :is(.nav-link, .nav-trigger, .nav-login) {
    transition: none;
  }
}