/* ============================================
   SITE HEADER / NAV

   Transparent by default — blends into whatever
   section sits behind it on page load.

   JS adds .nav-dark when the header overlaps a
   section with [data-nav-theme="dark"], flipping
   to white text + dark bg.

   Once the user has scrolled at all, .nav-scrolled
   is added to give the bar a solid backdrop so it
   doesn't fight with content behind it.

   Mobile: logo left, CTA + burger right.
   Desktop: logo left, links center, CTA right.
   Services has a dropdown submenu on both layouts.
============================================ */

/* --- Header bar (transparent on load) --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 3rem;
  height: 72px;
}


/* --- Logo --- */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  margin-right: auto;
}

.nav-logo .nwa-logo {
  width: 120px;
  height: auto;
}

.nav-logo .logo-wordmark {
  fill: var(--dark);
  transition: fill 0.4s;
}

.nav-logo .logo-tagline {
  fill: var(--text-light);
  transition: fill 0.4s;
}

/* Raster fallback (if uploaded via Customizer) */
.nav-logo img {
  width: 120px;
  height: auto;
}


/* --- Nav links (desktop: horizontal row) --- */
.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(17, 18, 16, 0.5);
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
  transition: color 0.2s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--dark);
}

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


/* --- Submenu chevron (inline with parent link) --- */
.submenu-chevron {
  display: inline-block;
  width: 10px;
  height: 6px;
  margin-left: 4px;
  vertical-align: middle;
  transition: transform 0.25s var(--ease-out);
}


/* --- Desktop submenu dropdown --- */
.has-submenu {
  position: relative;
}

.submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  list-style: none;
  min-width: 180px;
  padding: 0.6rem 0;
  margin-top: 0.75rem;
  background: var(--white);
  border-radius: 6px;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.08),
    0 1px 4px rgba(0, 0, 0, 0.04);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(4px);
  transition:
    opacity 0.25s var(--ease-out),
    visibility 0.25s,
    transform 0.25s var(--ease-out);
  pointer-events: none;
}

/* Invisible bridge so mouse can travel from link to dropdown */
.submenu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

/* Open state */
.has-submenu.submenu-open > .submenu,
.has-submenu:hover > .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.has-submenu.submenu-open > a .submenu-chevron,
.has-submenu:hover > a .submenu-chevron {
  transform: rotate(180deg);
}

/* Submenu links */
.submenu a {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
  color: rgba(17, 18, 16, 0.55);
  padding: 0.5rem 1.2rem;
  white-space: nowrap;
  transition: color 0.2s, background 0.2s;
}

.submenu a::after {
  display: none; /* no underline in dropdown */
}

.submenu a:hover,
.submenu a.active {
  color: var(--dark);
  background: rgba(17, 18, 16, 0.03);
}

/* --- Dark state: submenu --- */
.site-header.nav-dark .submenu {
  background: var(--dark);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.3),
    0 1px 4px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header.nav-dark .submenu a {
  color: rgba(247, 246, 242, 0.5);
}

.site-header.nav-dark .submenu a:hover,
.site-header.nav-dark .submenu a.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.05);
}

/* Scrolled-light dropdown stays light */
.site-header.nav-scrolled:not(.nav-dark) .submenu {
  background: var(--white);
}

/* Scrolled-dark dropdown */
.site-header.nav-scrolled.nav-dark .submenu {
  background: rgba(17, 18, 16, 0.98);
}


/* --- CTA button --- */
.nav-cta {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent-dark);
  border: 1px solid rgba(23, 79, 139, 0.3);
  padding: 0.5rem 1.2rem;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--accent-dark);
  color: var(--white);
}


/* --- Burger (hidden on desktop) --- */
.nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  width: 36px;
  height: 36px;
  position: relative;
  z-index: 110;
}

.burger-line {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--dark);
  border-radius: 1px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s, background 0.4s;
  position: absolute;
  left: 8px;
}

.burger-line:nth-child(1) { top: 13px; }
.burger-line:nth-child(2) { top: 21px; }


/* ============================================
   SCROLLED STATE — solid backdrop
   Added as soon as user scrolls even 1px.
   Prevents content from bleeding through.
============================================ */
.site-header.nav-scrolled {
  background: rgba(247, 246, 242, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}


/* ============================================
   DARK STATE — white text over dark sections
   Applied via JS when nav overlaps
   [data-nav-theme="dark"]. Works both before
   and after .nav-scrolled is added.
============================================ */
.site-header.nav-dark .nav-logo .logo-wordmark { fill: var(--white); }
.site-header.nav-dark .nav-logo .logo-tagline  { fill: rgba(247, 246, 242, 0.4); }
.site-header.nav-dark .nav-links a  { color: rgba(247, 246, 242, 0.5); }

.site-header.nav-dark .nav-links a:hover,
.site-header.nav-dark .nav-links a.active { color: var(--white); }

.site-header.nav-dark .nav-cta {
  color: var(--accent);
  border-color: rgba(74, 143, 216, 0.4);
}

.site-header.nav-dark .nav-cta:hover {
  background: var(--accent);
  color: var(--white);
}

.site-header.nav-dark .burger-line { background: var(--white); }

/* Scrolled + dark = dark solid backdrop */
.site-header.nav-scrolled.nav-dark {
  background: rgba(17, 18, 16, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}


/* ============================================
   MOBILE NAV — ≤ 900px
============================================ */
@media (max-width: 900px) {

  .site-header nav {
    padding: 0 1.5rem;
    justify-content: space-between;
    gap: 0;
  }

  /* Logo stays left */
  .nav-logo {
    order: 0;
    flex: 1;
    align-items: center;
    margin-right: 0;
  }

  /* CTA in the middle-right */
  .nav-cta {
    order: 1;
    font-size: 0.65rem;
    padding: 0.4rem 0.8rem;
  }

  /* Burger on far right */
  .nav-burger {
    display: block;
    order: 2;
    margin-left: 0.75rem;
  }

  /* --- Nav links → full-screen overlay --- */
  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 105;
    background: var(--dark);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0;
    padding: 5rem 2rem 3rem;

    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
      opacity 0.35s var(--ease-out),
      visibility 0.35s,
      transform 0.35s var(--ease-out);
  }

  .nav-links a {
    font-size: 1.4rem;
    letter-spacing: 0.04em;
    color: rgba(247, 246, 242, 0.6);
    padding: 1rem 0;
    display: block;
  }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--white);
  }

  .nav-links a::after { display: none; }

  /* --- Chevron: visible on mobile, rotated when open --- */
  .submenu-chevron {
    display: inline-block;
    margin-left: 6px;
    transition: transform 0.3s var(--ease-out);
  }

  /* Starts expanded → chevron points up */
  .has-submenu.submenu-open > a .submenu-chevron {
    transform: rotate(180deg);
  }

  /* --- Mobile submenu: starts expanded, collapsible on tap --- */
  .has-submenu {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .submenu {
    position: static;
    transform: none;
    background: transparent;
    box-shadow: none;
    border: none;
    overflow: hidden;
    padding: 0;
    margin: 0;
    min-width: 0;
    width: auto;
    border-radius: 0;

    /* Collapsed state */
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      max-height 0.35s var(--ease-out),
      opacity 0.25s var(--ease-out),
      visibility 0.25s;
  }

  /* Expanded state (JS adds .submenu-open on load for mobile) */
  .has-submenu.submenu-open > .submenu {
    max-height: 300px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    padding: 0.15rem 0 0.4rem;
    transform: none;
  }

  .submenu::before {
    display: none;
  }

  .submenu a {
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    color: rgba(247, 246, 242, 0.35);
    padding: 0.4rem 0 0.4rem 1.2rem;
    position: relative;
  }

  /* Subtle left bar to show nesting */
  .submenu li {
    position: relative;
    padding-left: 0;
  }

  .submenu li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    bottom: 0.55rem;
    width: 1px;
    background: rgba(247, 246, 242, 0.1);
  }

  .submenu a:hover,
  .submenu a.active {
    color: rgba(247, 246, 242, 0.7);
    background: transparent;
  }

  /* Prevent desktop hover rules from interfering on mobile */
  .has-submenu:hover > .submenu {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    padding: 0;
    transform: none;
  }

  .has-submenu.submenu-open:hover > .submenu {
    max-height: 300px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    padding: 0.15rem 0 0.4rem;
    transform: none;
  }

  /* Dark-state overrides not needed on mobile (overlay is always dark) */
  .site-header.nav-dark .submenu,
  .site-header.nav-scrolled .submenu,
  .site-header.nav-scrolled.nav-dark .submenu {
    background: transparent;
    box-shadow: none;
    border: none;
  }

  /* --- Open state --- */
  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  /* Burger → X when open */
  .nav-burger[aria-expanded="true"] .burger-line { background: var(--white); }
  .nav-burger[aria-expanded="true"] .burger-line:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
  }
  .nav-burger[aria-expanded="true"] .burger-line:nth-child(2) {
    transform: translateY(-4px) rotate(-45deg);
  }
}