/* ==========================================================================
   nav.css — Penumbra Rental
   Sticky navigation · Mobile overlay · Scroll transition
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base nav
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: 72px;
  transition: background var(--transition-slow), border-bottom var(--transition-slow);
  border-bottom: 1px solid transparent;
}

/* Transparent over hero */
.nav--transparent {
  background: transparent;
}

/* Solid state (after scroll) */
.nav--solid {
  background: rgba(7, 9, 11, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav__inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

/* --------------------------------------------------------------------------
   Wordmark
   -------------------------------------------------------------------------- */
.nav__wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.nav__wordmark:hover { opacity: 0.8; }

.nav__wordmark-text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1875rem;
  letter-spacing: 0.2em;
  color: var(--color-text);
  text-transform: uppercase;
}

.nav__tagline {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.22em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-top: 3px;
}

/* --------------------------------------------------------------------------
   Desktop nav links
   -------------------------------------------------------------------------- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  position: relative;
  transition: color var(--transition);
  padding-bottom: 2px;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link--active {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Right side
   -------------------------------------------------------------------------- */
.nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.nav__phone {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-steel);
  letter-spacing: 0.06em;
  transition: color var(--transition);
}

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

.nav__cta {
  font-size: var(--fs-xs);
  padding: 0.625rem 1.25rem;
}

/* --------------------------------------------------------------------------
   Hamburger toggle (mobile only)
   -------------------------------------------------------------------------- */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  margin-left: auto;
  transition: opacity var(--transition);
}

.nav__toggle:hover { opacity: 0.7; }

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition), width var(--transition);
  transform-origin: left center;
}

/* Animated open state */
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: rotate(42deg) translateY(-1px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: rotate(-42deg) translateY(1px);
}

/* --------------------------------------------------------------------------
   Mobile fullscreen overlay
   -------------------------------------------------------------------------- */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  background: var(--color-bg-deep);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  pointer-events: none;
}

.nav-overlay:not([hidden]) {
  pointer-events: all;
}

.nav-overlay.is-open {
  opacity: 1;
  transform: translateY(0);
}

.nav-overlay__close {
  position: absolute;
  top: 1.5rem;
  right: var(--gutter);
  font-size: 1.5rem;
  color: var(--color-steel);
  transition: color var(--transition);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-overlay__close:hover { color: var(--color-text); }

.nav-overlay__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.nav-overlay__link {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 5vw, 2rem);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition), padding-left var(--transition);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-overlay__link::before {
  content: '//';
  color: var(--color-gold);
  font-size: 0.65em;
  opacity: 0;
  transition: opacity var(--transition);
}

.nav-overlay__link:hover,
.nav-overlay__link--active {
  color: var(--color-text);
  padding-left: var(--space-3);
}

.nav-overlay__link:hover::before,
.nav-overlay__link--active::before {
  opacity: 1;
}

.nav-overlay__footer {
  margin-top: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

.nav-overlay__phone {
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-steel);
  letter-spacing: 0.08em;
}

/* --------------------------------------------------------------------------
   Responsive: show/hide
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .nav__links {
    gap: var(--space-5);
  }
}

@media (max-width: 960px) {
  .nav__phone {
    display: none;
  }
  .nav__links {
    gap: var(--space-4);
  }
}

@media (max-width: 820px) {
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__inner {
    justify-content: space-between;
  }
}