/* ============================================================
   Blueprint AI with Kirk — nav.css
   Navigation Component Styles
   Load after reset.css on every page.
   ============================================================ */


/* ── Nav wrapper ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  height: var(--nav-height);
  display: block;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out),
    backdrop-filter var(--duration-slow) var(--ease-out);
}

.site-nav.scrolled {
  background: rgba(237, 242, 247, 0.94);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom-color: rgba(0, 0, 0, 0.07);
}


/*
  ── 3-Column Nav Layout ─────────────────────────────────────
  Logo LEFT  ·  Links TRUE-CENTER  ·  CTA RIGHT

  Key technique: grid-template-columns: 1fr auto 1fr
    - Left col (1fr) holds the logo, left-aligned
    - Center col (auto) holds the links, self-centered
    - Right col (1fr) holds the CTA, right-aligned
  This guarantees the links are always centered to the full
  page width, not just to the remaining space after the logo.
  ────────────────────────────────────────────────────────────
*/
.nav-inner-3col {
  width: 100%;
  height: var(--nav-height);
  max-width: var(--container-2xl);
  margin-inline: auto;
  padding-inline: var(--space-8);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0;
}

@media (min-width: 768px) {
  .nav-inner-3col { padding-inline: var(--space-10); }
}


/* ── LEFT: Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  text-decoration: none;
  justify-self: start;
}

.nav-logo-img {
  display: block;
  height: 52px;          /* nav logo height — PNG is 592x108 natural ratio */
  min-width: 260px;      /* prevent logo from collapsing on mobile */
  width: auto;
  object-fit: contain;
  object-position: left center;
  border-radius: 6px;
}

@media (max-width: 768px) {
  .nav-logo-img {
    height: 44px;
    min-width: 220px;
  }
}

/* Fallback text (shown if image fails to load) */
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nav-logo-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-void);
  letter-spacing: 0.3px;
}

.nav-logo-sub {
  font-family: var(--font-sans);
  font-size: 0.5rem;
  font-weight: var(--weight-light);
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-ice);
  margin-top: 3px;
}


/* ── CENTER: Nav links ── */
.nav-links-centered {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  justify-self: center;
}

@media (min-width: 768px) {
  .nav-links-centered { display: flex; }
}

.nav-links-centered a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: #555;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: color var(--duration-base) var(--ease-out);
  position: relative;
  white-space: nowrap;
  text-decoration: none;
}

.nav-links-centered a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 1.5px;
  background: var(--color-ice);
  transform: scaleX(0);
  transition: transform var(--duration-base) var(--ease-out);
  transform-origin: left;
}

.nav-links-centered a:hover                        { color: var(--color-void); }
.nav-links-centered a:hover::after,
.nav-links-centered a[aria-current="page"]::after  { transform: scaleX(1); }
.nav-links-centered a[aria-current="page"]         { color: var(--color-void); }


/* ── RIGHT: CTA + mobile toggle ── */
.nav-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  justify-self: end;
}

/* CTA pill */
.nav-cta-pill {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: #fff;
  background: var(--color-void);
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition:
    background var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.nav-cta-pill:hover {
  background: #1a2a38;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
  color: #fff;
}


/* ── Mobile hamburger ── */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--color-void);
  border-radius: var(--radius-full);
  transition:
    transform var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out),
    width var(--duration-base) var(--ease-out);
  transform-origin: center;
}

.nav-toggle span:nth-child(1) { width: 24px; }
.nav-toggle span:nth-child(2) { width: 16px; }
.nav-toggle span:nth-child(3) { width: 20px; }

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
  width: 22px;
  background: var(--color-ice);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  width: 22px;
  background: var(--color-ice);
}


/* ── Mobile menu drawer ── */
.nav-mobile {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(237, 242, 247, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
  z-index: 99;
}

.nav-mobile.open { max-height: 400px; }

.nav-mobile-inner {
  padding: var(--space-6) var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav-mobile a {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: #555;
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  transition: color var(--duration-base) var(--ease-out);
  display: block;
  text-decoration: none;
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover,
.nav-mobile a[aria-current="page"] { color: var(--color-void); }

.nav-mobile .nav-mobile-cta {
  margin-top: var(--space-4);
  display: inline-block;
  font-size: var(--text-sm);
  color: #fff !important;
  background: var(--color-void);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  text-align: center;
  border-bottom: none !important;
}

.nav-mobile .nav-mobile-cta:hover {
  background: var(--color-slate) !important;
  color: #fff !important;
}


/* ── Page offset ── */
.nav-offset { height: var(--nav-height); }