/* ============================================================
   HTK Group — Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), border-color var(--transition),
              backdrop-filter var(--transition);
}

.nav--scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(160,160,160,0.12);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 max(2rem, env(safe-area-inset-right, 0px)) 0 max(2rem, env(safe-area-inset-left, 0px));
  min-width: 0;
  box-sizing: border-box;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo img {
  height: 48px;
  width: auto;
  transition: opacity var(--transition);
}

.nav__logo:hover img {
  opacity: 0.8;
}

/* Links list */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--silver);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav__link:hover,
.nav__item.active > .nav__link {
  color: var(--white);
}

.nav__link--cta {
  background: transparent;
  border: 1px solid rgba(160,160,160,0.35);
  color: var(--silver-light);
  margin-left: 0.5rem;
}

.nav__link--cta:hover {
  border-color: var(--silver-light);
  color: var(--white);
  background: rgba(160,160,160,0.08);
}

/* Chevron icon */
.nav__chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.nav__item--open .nav__chevron {
  transform: rotate(180deg);
}

/* ── Dropdown ───────────────────────────────────────────── */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: rgba(15, 15, 15, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(160,160,160,0.15);
  border-radius: var(--radius-lg);
  min-width: 220px;
  padding: 0.75rem 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 16px 48px rgba(0,0,0,0.6);
}

.nav__dropdown::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: rgba(15,15,15,0.97);
  border-left: 1px solid rgba(160,160,160,0.15);
  border-top: 1px solid rgba(160,160,160,0.15);
  z-index: 1;
}

/* Transparent bridge that closes the hover gap between trigger and dropdown */
.nav__dropdown::after {
  content: '';
  position: absolute;
  top: -14px;
  left: 0;
  right: 0;
  height: 14px;
  background: transparent;
}

.nav__item--open .nav__dropdown,
.nav__item:hover .nav__dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: 0.65rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--silver);
  transition: color var(--transition), background var(--transition);
}

.nav__dropdown-link:hover {
  color: var(--white);
  background: rgba(160,160,160,0.08);
}

/* ── Mobile Hamburger ───────────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  height: 2px;
  background: var(--silver-light);
  border-radius: 2px;
  transition: all var(--transition);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu ────────────────────────────────────────── */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8,8,8,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 999;
  padding: 2rem max(1.5rem, env(safe-area-inset-right, 0px)) 3rem max(1.5rem, env(safe-area-inset-left, 0px));
  flex-direction: column;
  gap: 0.25rem;
  border-top: 1px solid rgba(160,160,160,0.1);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile-link {
  display: block;
  padding: 1rem 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  border-bottom: 1px solid rgba(160,160,160,0.08);
  transition: color var(--transition);
}

.nav__mobile-link:hover {
  color: var(--white);
}

.nav__mobile-section {
  padding: 1rem 0.75rem 0.5rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--silver-dark);
}

.nav__mobile-sub {
  display: block;
  padding: 0.65rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--silver);
  transition: color var(--transition);
}

.nav__mobile-sub:hover {
  color: var(--white);
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 960px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__inner {
    padding-left: max(1.25rem, env(safe-area-inset-left, 0px));
    padding-right: max(1.25rem, env(safe-area-inset-right, 0px));
  }
}