/* ─── Nav ────────────────────────────────────────────────── */
#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: clamp(20px, 5vw, 60px);
  z-index: var(--z-nav);
  transition: background 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease;
  border-bottom: 1px solid transparent;
}

#site-nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
}

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

.nav-logo-img {
  height: 144px;
  width: auto;
  display: block;
  transition: height 0.3s ease;
}

#site-nav.scrolled {
  height: 72px;
}

#site-nav.scrolled .nav-logo-img {
  height: 48px;
}

/* ─── Center Links ───────────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links > li {
  position: relative;
}

.nav-links > li > a {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-white);
  opacity: 0.8;
  transition: opacity var(--transition-base), color var(--transition-base);
  white-space: nowrap;
}

.nav-links > li > a:hover,
.nav-links > li.active > a {
  opacity: 1;
  color: var(--color-gold);
}

/* ─── Dropdown ───────────────────────────────────────────── */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  box-shadow: var(--shadow-lg);
}

.nav-links > li:hover .nav-dropdown,
.nav-links > li:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color var(--transition-base), background var(--transition-base);
}

.nav-dropdown a:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.04);
}

/* dropdown arrow indicator */
.nav-links > li.has-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: 6px;
  vertical-align: middle;
  opacity: 0.6;
  transition: transform 0.2s ease;
}

.nav-links > li.has-dropdown:hover > a::after {
  transform: rotate(180deg);
}

/* ─── Right Actions ──────────────────────────────────────── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-phone {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-gold);
  white-space: nowrap;
  transition: opacity var(--transition-base);
}

.nav-phone:hover {
  opacity: 0.75;
}

.nav-cta {
  padding: 10px 22px;
  background: var(--color-red);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: background var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-red-hot);
  transform: translateY(-1px);
}

/* ─── Hamburger ──────────────────────────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 36px;
  height: 36px;
  padding: 4px;
  background: none;
  border: none;
  cursor: none;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-hamburger.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav-hamburger.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ─── Mobile Menu Overlay ────────────────────────────────── */
#mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-black);
  z-index: calc(var(--z-nav) - 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-4xl) clamp(20px, 8vw, 80px) var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s;
}

#mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  width: 100%;
}

.mobile-menu-links a {
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 56px);
  letter-spacing: 0.05em;
  color: var(--color-white);
  opacity: 0.85;
  transition: opacity var(--transition-base), color var(--transition-base);
  line-height: 1;
}

.mobile-menu-links a:hover {
  opacity: 1;
  color: var(--color-gold);
}

.mobile-menu-sub {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding-top: 0;
}

.mobile-menu-sub.is-open {
  max-height: 500px;
  padding-top: var(--space-md);
}

.mobile-flooring-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 56px);
  letter-spacing: 0.05em;
  color: var(--color-white);
  opacity: 0.85;
  background: none;
  border: none;
  cursor: none;
  line-height: 1;
  transition: opacity var(--transition-base), color var(--transition-base);
}

.mobile-flooring-toggle:hover {
  opacity: 1;
  color: var(--color-gold);
}

.mobile-flooring-chevron {
  display: inline-block;
  font-size: 0.5em;
  transition: transform 0.3s ease;
  opacity: 0.6;
}

.mobile-flooring-toggle.is-open .mobile-flooring-chevron {
  transform: rotate(180deg);
}

.mobile-menu-sub a {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.mobile-menu-sub a:hover {
  color: var(--color-white);
}

.mobile-menu-footer {
  margin-top: var(--space-2xl);
  text-align: center;
}

.mobile-menu-footer a {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-gold);
  letter-spacing: 0.06em;
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav-links,
  .nav-phone {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-logo-img { height: 72px; }
  #site-nav { height: 88px; }
}