/* ============================================================
   GNEXZ — NAVIGATION & FOOTER
   Shared nav and footer for all public pages.
   ============================================================ */

/* ============================================================
   TOP NAV (public pages)
   ============================================================ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-3) var(--sp-6);
  transition: background var(--duration-base) var(--ease-out);
}

/* Optional: add scroll background */
.site-nav--scrolled {
  background: rgba(10, 19, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(46, 74, 99, 0.15);
}

.nav-logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
  text-decoration: none;
  transition: opacity var(--duration-fast);
}

.nav-logo:hover { opacity: 0.8; }

.nav-links {
  display: flex;
  gap: var(--sp-4);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neutral-500);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
  padding: var(--sp-1) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--yellow-500);
  transition: width var(--duration-base) var(--ease-out);
}

.nav-links a:hover {
  color: var(--neutral-200);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--yellow-500);
}

.nav-links a.active::after {
  width: 100%;
  background: var(--yellow-500);
}

/* ── Back Link (subpages) ── */
.nav-back {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--neutral-500);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--duration-fast);
}

.nav-back:hover { color: var(--neutral-200); }

/* ── Mobile Toggle ── */
.nav-toggle {
  display: none;
  position: relative;
  z-index: 200;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(46, 74, 99, 0.4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--neutral-200);
  transition: all var(--duration-base) var(--ease-out);
}

/* Toggle active state */
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* ============================================================
   SIDEBAR NAV (docs/brandbook pages)
   ============================================================ */
.nav-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--blue-950);
  border-right: 1px solid rgba(46, 74, 99, 0.4);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  padding: var(--sp-8) 0 var(--sp-4);
}

.nav-sidebar .nav-logo-block {
  padding: 0 var(--sp-4) var(--sp-6);
  border-bottom: 1px solid rgba(46, 74, 99, 0.3);
}

.nav-sidebar .nav-logo-name {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.02em;
  display: block;
  line-height: 1.2;
}

.nav-sidebar .nav-logo-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--neutral-500);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-top: 4px;
}

.nav-sidebar .nav-list {
  list-style: none;
  padding: var(--sp-4) 0 0;
  flex: 1;
}

.nav-sidebar .nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px var(--sp-4);
  text-decoration: none;
  color: var(--neutral-500);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
  border-left: 2px solid transparent;
}

.nav-sidebar .nav-link:hover {
  color: var(--neutral-200);
  background: rgba(46, 74, 99, 0.2);
}

.nav-sidebar .nav-link.active {
  color: var(--yellow-500);
  border-left-color: var(--yellow-500);
  background: rgba(242, 183, 5, 0.04);
}

.nav-sidebar .nav-num {
  font-size: 9px;
  font-weight: 600;
  color: var(--blue-700);
  letter-spacing: 0.05em;
  min-width: 18px;
}

.nav-sidebar .nav-link.active .nav-num {
  color: var(--yellow-700);
}

.nav-sidebar .nav-footer-block {
  padding: var(--sp-4);
  border-top: 1px solid rgba(46, 74, 99, 0.3);
}

.nav-sidebar .nav-footer-text {
  font-size: 10px;
  color: var(--neutral-800);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ============================================================
   SITE FOOTER
   ============================================================ */
.site-footer {
  background: var(--blue-950);
  border-top: 1px solid rgba(46, 74, 99, 0.3);
  padding: var(--sp-8) var(--sp-6);
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--neutral-800);
}

.footer-nav {
  display: flex;
  gap: var(--sp-4);
}

.footer-nav a {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--neutral-500);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer-nav a:hover { color: var(--neutral-200); }

.footer-copy {
  font-size: 11px;
  color: var(--neutral-800);
  font-weight: 400;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .site-nav {
    padding: var(--sp-2) var(--sp-3);
  }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  /* Mobile menu open */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(10, 19, 32, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    justify-content: center;
    align-items: center;
    gap: var(--sp-6);
    z-index: 150;
  }

  .nav-links.open a {
    font-size: var(--text-body-lg);
    color: var(--neutral-200);
  }

  /* Sidebar on mobile */
  .nav-sidebar {
    transform: translateX(-100%);
    transition: transform var(--duration-base) var(--ease-out);
  }

  .nav-sidebar.open {
    transform: translateX(0);
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
  }
}