/* Global site chrome: burger + drawer (injected on all public HTML) */
:root {
  --site-nav-h: 3rem;
  --site-nav-total-h: calc(var(--site-nav-h) + env(safe-area-inset-top, 0px));
  --site-nav-bg: #2c2820;
  --site-nav-ink: #f0ece4;
  --site-nav-muted: #c8c0b0;
  --site-nav-accent: #8b6914;
  --site-nav-drawer-w: min(22rem, 92vw);
  --site-nav-content-max: 56rem;
}

body.has-site-nav {
  padding-top: var(--site-nav-total-h);
}

#site-nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10060;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 0;
  padding-top: env(safe-area-inset-top, 0px);
  min-height: var(--site-nav-h);
  height: var(--site-nav-total-h);
  box-sizing: border-box;
  background: var(--site-nav-bg);
  border-bottom: 2px solid var(--site-nav-accent);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

#site-nav-bar .site-nav-inner {
  flex: 1;
  max-width: var(--site-nav-content-max);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.65rem 0 0.45rem;
  min-width: 0;
}

#site-nav-bar .site-nav-home {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  color: var(--site-nav-ink);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
}

#site-nav-bar .site-nav-home:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

#site-nav-bar .site-nav-home svg {
  display: block;
  width: 18px;
  height: 18px;
}

#site-nav-bar .site-nav-motion {
  flex-shrink: 0;
  font-size: 0.78rem;
  font-weight: 600;
  color: #e9d5ff;
  text-decoration: none;
  padding: 0.35rem 0.55rem;
  border: 1px solid rgba(233, 213, 255, 0.35);
  border-radius: 6px;
  white-space: nowrap;
}

#site-nav-bar .site-nav-motion:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

#site-nav-burger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--site-nav-ink);
  cursor: pointer;
  flex-shrink: 0;
}

#site-nav-burger:hover {
  background: rgba(255, 255, 255, 0.14);
}

#site-nav-burger svg {
  display: block;
  width: 20px;
  height: 20px;
}

#site-nav-bar .site-nav-title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--site-nav-ink);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

#site-nav-bar .site-nav-title:hover {
  color: #fff;
}

#site-nav-overlay {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  top: var(--site-nav-total-h);
  z-index: 10040;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#site-nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

#site-nav-drawer {
  position: fixed;
  top: var(--site-nav-total-h);
  left: 0;
  bottom: 0;
  width: var(--site-nav-drawer-w);
  z-index: 10055;
  background: #fffdfa;
  color: #1a1814;
  transform: translateX(-105%);
  transition: transform 0.22s ease, visibility 0.22s;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  line-height: 1.4;
  visibility: hidden;
  pointer-events: none;
}

#site-nav-drawer.open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

#site-nav-drawer header {
  padding: 0.75rem 1rem;
  background: var(--site-nav-bg);
  color: var(--site-nav-ink);
  border-bottom: 2px solid var(--site-nav-accent);
  position: sticky;
  top: 0;
  z-index: 1;
}

#site-nav-drawer header strong {
  display: block;
  font-size: 0.92rem;
}

#site-nav-drawer nav {
  padding: 0.5rem 0 0.25rem;
}

#site-nav-drawer .site-nav-drawer-foot {
  margin: 0.5rem 1rem 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px dashed #d8d0c4;
  font-size: 0.82rem;
  font-family: system-ui, sans-serif;
  color: #5c564c;
}

#site-nav-vapor-toggle {
  background: none;
  border: 1px dashed #bbb;
  padding: 0.4rem 0.55rem;
  cursor: pointer;
  font: inherit;
  color: #2a4a6f;
  border-radius: 4px;
  width: 100%;
  text-align: left;
}

#site-nav-vapor-toggle:hover {
  background: #f6f4ef;
}

.site-nav-group {
  margin: 0;
  padding: 0.35rem 1rem 0.1rem;
  list-style: none;
}

.site-nav-group > li.group-label {
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #5c564c;
  margin: 0.55rem 0 0.3rem;
  padding: 0;
}

.site-nav-group > li.group-label:first-child {
  margin-top: 0;
}

.site-nav-group a {
  display: block;
  padding: 0.32rem 0;
  color: #2a4a6f;
  text-decoration: none;
  line-height: 1.35;
}

.site-nav-group a:hover {
  text-decoration: underline;
}

.site-nav-group a[aria-current="page"] {
  font-weight: 700;
  color: #1a1814;
}

.site-nav-group .sub a {
  padding-left: 0.75rem;
  font-size: 0.81rem;
  color: #444;
}

/* Journal and long docs: avoid double top padding with .wrap */
body.has-site-nav .wrap {
  padding-top: 1.5rem !important;
}

body.has-site-nav > header:first-of-type:not(#site-nav-drawer header) {
  scroll-margin-top: var(--site-nav-h);
}

p.site-trail {
  font-size: 0.88rem;
  color: #555;
  margin: 0 0 1rem;
  line-height: 1.5;
  font-family: Georgia, "Times New Roman", serif;
}

p.site-trail a {
  color: #2a4a6f;
  font-weight: 600;
}

@media (max-width: 520px) {
  #site-nav-bar .site-nav-title {
    font-size: 0.8rem;
  }
  #site-nav-bar .site-nav-motion {
    font-size: 0.72rem;
    padding: 0.3rem 0.4rem;
  }
}

@media print {
  #site-nav-bar,
  #site-nav-drawer,
  #site-nav-overlay,
  p.site-trail {
    display: none !important;
  }
  body.has-site-nav {
    padding-top: 0;
  }
}