/* ============================================================
   NAV.CSS — BVardhan Group
   Navigation styles — desktop + mobile
   ============================================================ */

/* ── Sticky Nav ─────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background-color: rgba(255,255,255,0.78);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 900;
  transition: box-shadow 0.4s ease, background-color 0.4s ease, border-color 0.4s ease;
}

/* Fallback for browsers without backdrop-filter — stay opaque so logo never washes out */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .site-nav { background-color: var(--ivory); }
}

.site-nav.scrolled {
  background-color: rgba(255,255,255,0.9);
  box-shadow: 0 1px 30px rgba(0,0,0,0.07);
  border-bottom-color: var(--border-solid);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

/* ── Logo ───────────────────────────────────────────────── */
.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo__img {
  height: 70px;
  width: auto;
}

.nav-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo__name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--charcoal);
  letter-spacing: 0.05em;
}

.nav-logo__sub {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ── Desktop Nav Links ──────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

.nav-link,
.nav-dropdown__trigger {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--espresso);
  padding: 8px 16px;
  position: relative;
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 4px;
  border-radius: 1px;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 16px;
  right: 16px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-dropdown__trigger:hover {
  color: var(--gold);
}

/* Dropdown chevron */
.nav-dropdown__trigger svg {
  width: 12px;
  height: 12px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.nav-dropdown.open .nav-dropdown__trigger svg {
  transform: rotate(180deg);
}

/* ── Dropdown Menu ──────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 280px;
  background: var(--ivory);
  border: 1px solid var(--border);
  box-shadow: 0 8px 40px rgba(0,0,0,0.10);
  padding: 16px 0;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
  max-height: calc(100vh - var(--nav-h) - 24px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.nav-dropdown.open .nav-dropdown__menu {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.dropdown-group {
  padding: 0 0 8px;
}

.dropdown-group:not(:last-child) {
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.dropdown-group__label {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
  padding: 8px 20px 4px;
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--espresso);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.dropdown-item:hover {
  background: var(--ivory-deep);
  color: var(--gold);
}

.dropdown-item .badge {
  font-size: 8px;
  padding: 3px 7px;
}

/* ── Nav CTA ────────────────────────────────────────────── */
.nav-cta {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 24px;
  border: 1px solid var(--gold);
  color: var(--gold);
  background: transparent;
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
  border-radius: 1px;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--gold);
  color: var(--ivory);
}

/* ── Hamburger (mobile) ─────────────────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 18px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  flex-shrink: 0;
  z-index: 1001;
  position: relative;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--charcoal);
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Hamburger → X animation */
.nav-hamburger.is-active span:nth-child(1) {
  transform: translateY(8.25px) rotate(45deg);
  background: var(--ivory);
}

.nav-hamburger.is-active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger.is-active span:nth-child(3) {
  transform: translateY(-8.25px) rotate(-45deg);
  background: var(--ivory);
}

/* ── Mobile Nav Overlay ─────────────────────────────────── */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  background: var(--charcoal);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: var(--nav-h) 40px 40px;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease-out);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-mobile-overlay.is-open {
  transform: translateX(0);
}

.nav-mobile-links {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-mobile-link {
  font-family: var(--font-serif);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 300;
  color: var(--ivory);
  text-decoration: none;
  padding: 16px 0;
  border-bottom: 1px solid rgba(184,155,94,0.15);
  display: block;
  transition: color 0.2s ease;
  position: relative;
}

.nav-mobile-link:hover {
  color: var(--gold);
}

.nav-mobile-accordion {
  overflow: hidden;
}

.nav-mobile-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  border-bottom: 1px solid rgba(184,155,94,0.15);
  padding: 16px 0;
  cursor: pointer;
}

.nav-mobile-accordion__trigger-text {
  font-family: var(--font-serif);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 300;
  color: var(--ivory);
}

.nav-mobile-accordion__trigger svg {
  width: 20px;
  height: 20px;
  color: var(--gold);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.nav-mobile-accordion.open .nav-mobile-accordion__trigger svg {
  transform: rotate(180deg);
}

.nav-mobile-accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.nav-mobile-accordion.open .nav-mobile-accordion__content {
  max-height: 600px;
}

.nav-mobile-subgroup {
  padding: 16px 0 8px 16px;
}

.nav-mobile-subgroup__label {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 8px;
}

.nav-mobile-sublink {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 300;
  color: rgba(248,245,239,0.75);
  text-decoration: none;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav-mobile-sublink:hover {
  color: var(--gold);
}

.nav-mobile-cta {
  margin-top: auto;
  padding-top: 40px;
}

.nav-mobile-contact {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--stone);
  margin-top: 16px;
}

/* ── Responsive: show hamburger, hide desktop nav ────────── */
@media (max-width: 960px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }
}