/* Shared ChrisRea.net navigation shell
   Keep this file loaded AFTER page-specific styles so the header behaves the
   same everywhere without flattening the personality of each page. */

:root {
  /* Keeps in-page #section jumps clear of the floating sticky banner. */
  --site-shell-anchor-offset: 7rem;
  --site-shell-max: 1180px;
  --site-shell-ink: #f7f8ff;
  --site-shell-muted: rgba(247, 248, 255, 0.72);
  --site-shell-line: rgba(255, 255, 255, 0.18);
  --site-shell-panel: rgba(5, 7, 32, 0.74);
  --site-shell-hover: rgba(255, 255, 255, 0.10);
  --site-shell-orange: #ff8e2b;
  --site-shell-rose: #610019;
}


/* Fragment links should land below the sticky site banner instead of under it.
   site-shell.css is loaded only by the duck-themed core pages, so standalone
   projects keep their original scrolling behavior. */
html {
  scroll-padding-top: var(--site-shell-anchor-offset);
}

body.site-shell-page [id] {
  scroll-margin-top: var(--site-shell-anchor-offset);
}

body.site-shell-page {
  transition: opacity 180ms ease, transform 180ms ease;
}

body.site-shell-page.site-page-leaving {
  opacity: 0;
  transform: translateY(-5px);
}

/* Chromium/modern browser enhancement: the shared header visually persists
   between same-origin HTML documents instead of appearing to blink away. */
@view-transition {
  navigation: auto;
}

.site-header {
  position: sticky !important;
  top: 0.75rem !important;
  z-index: 1000 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 1rem !important;
  width: min(calc(100% - 2rem), var(--site-shell-max)) !important;
  min-height: 64px;
  margin: 0.75rem auto 0 !important;
  padding: 0.7rem 0.75rem !important;
  border: 1px solid var(--site-shell-line) !important;
  border-radius: 999px !important;
  background: var(--site-shell-panel) !important;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28) !important;
  backdrop-filter: blur(22px) saturate(125%);
  -webkit-backdrop-filter: blur(22px) saturate(125%);
  color: var(--site-shell-ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  view-transition-name: site-header;
}

.site-header *,
.site-header *::before,
.site-header *::after {
  box-sizing: border-box;
}

.site-header .brand {
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.72rem !important;
  flex: 0 0 auto;
  color: var(--site-shell-ink) !important;
  text-decoration: none !important;
  font-weight: 800 !important;
  letter-spacing: -0.03em !important;
  white-space: nowrap;
  view-transition-name: site-brand;
}

.site-header .brand-mark {
  display: grid !important;
  place-items: center !important;
  width: 42px !important;
  height: 42px !important;
  flex: 0 0 42px;
  overflow: hidden;
  border-radius: 50% !important;
  background: linear-gradient(135deg, var(--site-shell-orange), rgba(255,255,255,0.94) 52%, var(--site-shell-rose)) !important;
  box-shadow: 0 12px 35px rgba(255, 142, 43, 0.25) !important;
}

.site-header .brand-mark img {
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
  image-rendering: crisp-edges;
}

.site-header .brand-text {
  color: var(--site-shell-ink) !important;
}

.site-header .site-nav {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-end;
  gap: 0.25rem !important;
  min-width: 0;
  overflow: visible !important;
  background: transparent !important;
  margin: 0 !important;
  padding: 0 !important;
  list-style: none !important;
}

.site-header .site-nav > a,
.site-header .nav-group-toggle {
  appearance: none;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  margin: 0 !important;
  padding: 0.66rem 0.86rem !important;
  border: 0;
  border-radius: 999px !important;
  background: transparent;
  color: var(--site-shell-muted) !important;
  font: inherit;
  font-size: 0.92rem !important;
  font-weight: 700 !important;
  line-height: 1 !important;
  text-align: center;
  text-decoration: none !important;
  white-space: nowrap;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.site-header .site-nav > a:hover,
.site-header .site-nav > a:focus-visible,
.site-header .nav-group-toggle:hover,
.site-header .nav-group-toggle:focus-visible,
.site-header .site-nav > a.is-active,
.site-header .nav-group-toggle.is-active,
.site-header .nav-group.is-open .nav-group-toggle {
  color: var(--site-shell-ink) !important;
  background: var(--site-shell-hover) !important;
  transform: translateY(-1px);
  outline: none;
}

.site-header .site-nav > a.is-active,
.site-header .nav-group-toggle.is-active {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.09);
}

.site-header .site-nav > .nav-pill {
  color: #170008 !important;
  background: linear-gradient(135deg, var(--site-shell-orange), #ffd4ad) !important;
  box-shadow: 0 9px 24px rgba(255, 142, 43, 0.14);
}

.site-header .site-nav > .nav-pill:hover,
.site-header .site-nav > .nav-pill:focus-visible {
  color: #170008 !important;
  background: linear-gradient(135deg, #ffa347, #ffe0c3) !important;
}

.site-header .nav-group {
  position: relative;
  float: none !important;
  display: block !important;
  margin: 0 !important;
}

.site-header .nav-group-toggle::after {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  margin-left: 0.48rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-0.12rem) rotate(45deg);
  transition: transform 160ms ease;
}

.site-header .nav-group.is-open .nav-group-toggle::after {
  transform: translateY(0.10rem) rotate(225deg);
}

.site-header .nav-submenu {
  position: absolute;
  top: calc(100% + 0.55rem);
  right: 0;
  z-index: 20;
  display: grid;
  gap: 0.25rem;
  width: max-content;
  min-width: 218px;
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--site-shell-line);
  border-radius: 20px;
  background: rgba(4, 6, 27, 0.94);
  box-shadow: 0 20px 55px rgba(0,0,0,0.38);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.985);
  transform-origin: top right;
  transition: opacity 150ms ease, transform 150ms ease, visibility 150ms ease;
}

.site-header .nav-group.is-open .nav-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.site-header .nav-submenu a {
  display: grid !important;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  min-height: 0 !important;
  padding: 0.78rem 0.9rem !important;
  border-radius: 14px !important;
  color: var(--site-shell-muted) !important;
  font: inherit;
  font-size: 0.88rem !important;
  font-weight: 700 !important;
  text-align: left !important;
  text-decoration: none !important;
  white-space: nowrap;
}

.site-header .nav-submenu a small {
  align-self: center;
  color: rgba(247, 248, 255, 0.44);
  font-size: 0.68rem;
  font-weight: 700;
}

.site-header .nav-submenu a:hover,
.site-header .nav-submenu a:focus-visible,
.site-header .nav-submenu a.is-active {
  color: var(--site-shell-ink) !important;
  background: rgba(255,255,255,0.09) !important;
  outline: none;
}

.site-header .menu-toggle {
  appearance: none;
  display: none !important;
  width: 46px !important;
  height: 46px !important;
  flex: 0 0 46px;
  margin: 0 !important;
  padding: 0 !important;
  border: 1px solid var(--site-shell-line) !important;
  border-radius: 999px !important;
  background: rgba(255,255,255,0.08) !important;
  cursor: pointer;
}

.site-header .menu-toggle span {
  display: block !important;
  width: 18px !important;
  height: 2px !important;
  margin: 4px auto !important;
  border-radius: 2px !important;
  background: white !important;
  transition: transform 160ms ease, opacity 160ms ease;
}

.site-header .menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-header .menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 1030px) {
  .site-header .site-nav > a,
  .site-header .nav-group-toggle {
    padding-inline: 0.68rem !important;
    font-size: 0.86rem !important;
  }
}

@media (max-width: 880px) {
  .site-header {
    top: 0.5rem !important;
    align-items: center !important;
    flex-wrap: wrap !important;
    border-radius: 28px !important;
  }

  .site-header .menu-toggle { display: block !important; }

  .site-header .site-nav {
    display: none !important;
    width: 100% !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.3rem !important;
    padding-top: 0.3rem !important;
  }

  .site-header .site-nav.is-open { display: flex !important; }

  .site-header .site-nav > a,
  .site-header .nav-group-toggle {
    width: 100%;
    justify-content: center;
    padding: 0.82rem 1rem !important;
  }

  .site-header .nav-group { width: 100%; }

  .site-header .nav-submenu {
    position: static;
    width: 100%;
    min-width: 0;
    max-height: 0;
    margin: 0;
    padding: 0;
    border-width: 0;
    border-radius: 16px;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transform: none;
    box-shadow: none;
  }

  .site-header .nav-group.is-open .nav-submenu {
    max-height: 260px;
    margin-top: 0.35rem;
    padding: 0.42rem;
    border-width: 1px;
    opacity: 1;
    visibility: visible;
  }

  .site-header .nav-submenu a {
    grid-template-columns: 1fr;
    gap: 0.14rem;
    text-align: center !important;
  }

  .site-header .nav-submenu a small { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  body.site-shell-page,
  .site-header *,
  .site-header *::before,
  .site-header *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}

/* Cross-document transition choreography: content gently exchanges while the
   named header remains visually anchored in place. */
@keyframes siteShellOldPage {
  to { opacity: 0; transform: translateY(-4px) scale(0.997); }
}

@keyframes siteShellNewPage {
  from { opacity: 0; transform: translateY(6px) scale(0.997); }
}

::view-transition-old(root) {
  animation: 150ms ease both siteShellOldPage;
}

::view-transition-new(root) {
  animation: 220ms ease both siteShellNewPage;
}

::view-transition-group(site-header),
::view-transition-group(site-brand) {
  animation-duration: 240ms;
  animation-timing-function: cubic-bezier(.2,.8,.2,1);
}


@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation-duration: 0.001ms !important;
  }
}