/* ═══════════════════════════════════════════════════════════
   SITE NAVIGATION — Local Answers
   Single shared nav system with two page-level variants:

   nav-transparent  → starts clear, turns solid on scroll
                      (dark cinematic hero pages)
   nav-solid        → solid from the first pixel
                      (article / report / utility pages)

   USAGE:
     <nav class="nav nav-transparent">  ← homepage, industry pages
     <nav class="nav nav-solid">        ← research reports, about
   ═══════════════════════════════════════════════════════════ */

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

/* ── Base shell ─────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 48px;
  /* Transition shared by both state classes */
  transition:
    background     0.32s ease,
    border-color   0.32s ease,
    backdrop-filter 0.32s ease;
}

.nav-inner {
  max-width: 1520px;
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

/* ─────────────────────────────────────────────────────
   STATE: transparent (dark-hero pages)
   Starts invisible. JS adds .is-scrolled after 24px.
   ───────────────────────────────────────────────────── */
.nav.nav-transparent {
  background:    rgba(5, 5, 15, 0);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.nav.nav-transparent.is-scrolled {
  background:    rgba(5, 5, 15, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ─────────────────────────────────────────────────────
   STATE: solid (content / article pages)
   Solid from the very first pixel — no scroll change.
   ───────────────────────────────────────────────────── */
.nav.nav-solid {
  background:    rgba(5, 5, 15, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* Fallback for any .nav without a variant class */
.nav:not(.nav-transparent):not(.nav-solid) {
  background:    rgba(5, 5, 15, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ── Logo ───────────────────────────────────────────── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo-img {
  height: 34px;
  width: auto;
  max-width: 180px;
  display: block;
  object-fit: contain;
}

/* ── Desktop link row ───────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
  justify-content: center;
}
.nav-link {
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(203, 213, 225, 0.75);
  text-decoration: none;
  transition: color 0.18s;
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.nav-link:hover      { color: #fff; }
.nav-link svg        { opacity: 0.55; transition: opacity 0.18s; }
.nav-link:hover svg  { opacity: 0.90; }
.nav-link-active     { color: #fff; }

/* ── Actions (right side) ───────────────────────────── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn-nav-primary {
  padding: 10px 22px;
  border-radius: 8px;
  background: linear-gradient(135deg, #5b6ef5, #7c5cfc);
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
  white-space: nowrap;
}
.btn-nav-primary:hover { opacity: 0.88; }

/* ── Dropdowns ──────────────────────────────────────── */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: 14px;
  min-width: 240px;
  z-index: 200;
}
.nav-dropdown-menu-inner {
  background: rgba(8, 9, 28, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 9px;
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(203, 213, 225, 0.85);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.nav-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}
.nav-dropdown-icon {
  width: 28px; height: 28px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

/* ── Hamburger ──────────────────────────────────────── */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
  z-index: 200;
}
.nav-burger-line {
  display: block;
  width: 22px; height: 2px;
  background: rgba(203, 213, 225, 0.8);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-burger.is-open .nav-burger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.is-open .nav-burger-line:nth-child(2) { opacity: 0; }
.nav-burger.is-open .nav-burger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ──────────────────────────────────── */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(5, 5, 15, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 99;
  padding: 20px 24px 28px;
  flex-direction: column;
  gap: 4px;
}
.nav-mobile-menu.is-open { display: flex; }

.nav-mobile-link {
  display: block;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(203, 213, 225, 0.8);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.nav-mobile-link:hover,
.nav-mobile-link:active   { background: rgba(255,255,255,.06); color: #fff; }
.nav-mobile-link-active   { color: #fff; }
.nav-mobile-divider       { height: 1px; background: rgba(255,255,255,.07); margin: 8px 0; }

.nav-mobile-cta {
  display: block;
  margin-top: 8px;
  padding: 13px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, #5b6ef5, #7c5cfc);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: opacity 0.2s;
}
.nav-mobile-cta:hover { opacity: 0.88; }

.nav-mobile-industries {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0 4px 16px;
}
.nav-mobile-sub-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(203, 213, 225, 0.7);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.nav-mobile-sub-link:hover { background: rgba(255,255,255,.05); color: #fff; }
.nav-mobile-sub-icon {
  width: 26px; height: 26px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
  .nav           { padding: 0 20px; }
  .nav-links     { display: none !important; }
  .nav-actions   { display: none !important; }
  .nav-burger    { display: flex; }
}