/* Shared BAX navigation. Linked from index.html and all subpages.
   Token names (--ivory, --navy, --font-sans, --font-mono) do not collide
   with legacy style.css (--bg, --ink, --sans, --mono). All rules are scoped
   to .bx-nav descendants so they cannot leak onto subpage layouts. */

:root {
  --ivory:      #F7F4EC;
  --navy:       #0E2A47;
  --navy-deep:  #081A2D;
  --navy-soft:  rgba(14, 42, 71, 0.65);
  --navy-hair:  rgba(14, 42, 71, 0.12);
  --font-sans:  'DM Sans', system-ui, sans-serif;
  --font-mono:  'DM Mono', ui-monospace, monospace;
  --nav-height: 72px;
  --max-w:      1240px;
  --pad-x:      32px;
}

.bx-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 236, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--navy-hair);
}
.bx-nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: var(--nav-height);
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  gap: 32px;
}
.bx-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.bx-brand-logo {
  height: 32px;
  width: auto;
  display: block;
}
.bx-brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--navy-soft);
  border-left: 1px solid var(--navy-hair);
  padding-left: 12px;
  white-space: nowrap;
}

.bx-nav-links {
  /* Reset legacy `nav { position: fixed; ... }` from style.css on subpages */
  position: static;
  top: auto;
  left: auto;
  right: auto;
  z-index: auto;
  height: auto;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 0;
  box-shadow: none;

  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
}
.bx-nav-links a {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
  text-decoration: none;
  opacity: 0.78;
  transition: opacity 0.18s ease;
}
.bx-nav-links a:hover { opacity: 1; }

.bx-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
  color: var(--ivory);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  padding: 10px 20px;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}
.bx-nav-cta:hover { background: var(--navy-deep); transform: translateY(-1px); }

.bx-nav-burger {
  display: none;
  margin-left: auto;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.bx-nav-burger svg { width: 22px; height: 22px; }

@media (max-width: 920px) {
  .bx-nav-links, .bx-nav-cta { display: none; }
  .bx-nav-burger { display: inline-flex; }
  .bx-nav.is-open .bx-nav-links {
    display: flex;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--ivory);
    border-bottom: 1px solid var(--navy-hair);
    padding: 12px 0;
    margin: 0;
  }
  .bx-nav.is-open .bx-nav-links a {
    padding: 14px var(--pad-x);
    font-size: 16px;
    opacity: 1;
  }
  .bx-nav.is-open .bx-nav-cta {
    display: inline-flex;
    margin: 12px var(--pad-x) 16px;
    align-self: flex-start;
    position: absolute;
    top: calc(var(--nav-height) + 56px * 5 + 12px);
    left: 0;
  }
}