/* ============================================================
   NAV.CSS — Sticky Glassmorphism Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition:
    height var(--duration-base) var(--ease-out),
    background-color var(--duration-base) var(--ease-out),
    backdrop-filter var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

/* Default: transparent over hero — white text for legibility on dark background */
.nav--transparent {
  background-color: transparent;
}

.nav--transparent .nav__logo-text {
  color: var(--color-surface-high);
}

.nav--transparent .nav__link {
  color: rgba(255, 255, 255, 0.85);
}

.nav--transparent .nav__link:hover {
  color: var(--color-surface-high);
}

.nav--transparent .nav__phone {
  color: rgba(255, 255, 255, 0.85);
}

.nav--transparent .nav__phone:hover {
  color: var(--color-accent);
}

.nav--transparent .nav__hamburger-line {
  background-color: var(--color-surface-high);
}

/* Scrolled: glassmorphism activates */
.nav--scrolled {
  height: var(--nav-height-sm);
  background-color: var(--color-nav-glass);
  backdrop-filter: blur(var(--nav-blur));
  -webkit-backdrop-filter: blur(var(--nav-blur));
  box-shadow: 0 1px 0 rgba(44, 47, 48, 0.08), var(--shadow-sm);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ─────────────────────────────────────────────────── */

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}

.nav__logo-imgs {
  display: grid;
}

.nav__logo-imgs > * {
  grid-area: 1 / 1;
}

.nav__logo-img {
  height: 40px;
  width: auto;
  transition: opacity 0.3s ease;
}

/* Default (inner pages — solid nav): show alt */
.nav__logo-img--main { opacity: 0; }
.nav__logo-img--alt  { opacity: 1; }

/* Transparent nav (hero pages at top): show main */
.nav--transparent .nav__logo-img--main { opacity: 1; }
.nav--transparent .nav__logo-img--alt  { opacity: 0; }

.nav__logo-text {
  font-size: var(--text-lg);
  font-weight: var(--weight-extrabold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1;
}

.nav__logo-text span {
  color: var(--color-accent);
}

/* ── Main Links ───────────────────────────────────────────── */

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  flex: 1;
  justify-content: center;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-spring);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

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

/* ── Right Actions ────────────────────────────────────────── */

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.nav__phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-ink);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__phone svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

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

/* ── Mobile Hamburger ─────────────────────────────────────── */

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: none;
  z-index: calc(var(--z-nav) + 1);
}

.nav__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: var(--radius-pill);
  transition:
    transform var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Overlay ───────────────────────────────────────── */

.nav__mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--color-surface-high);
  z-index: calc(var(--z-nav) - 1);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.nav__mobile-overlay.is-open {
  opacity: 1;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav__mobile-link {
  font-size: var(--text-3xl);
  font-weight: var(--weight-extrabold);
  letter-spacing: var(--tracking-display);
  color: var(--color-ink);
  text-decoration: none;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--duration-enter) var(--ease-out),
    transform var(--duration-enter) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.nav__mobile-overlay.is-open .nav__mobile-link:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 60ms; }
.nav__mobile-overlay.is-open .nav__mobile-link:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 120ms; }
.nav__mobile-overlay.is-open .nav__mobile-link:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 180ms; }
.nav__mobile-overlay.is-open .nav__mobile-link:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 240ms; }
.nav__mobile-overlay.is-open .nav__mobile-link:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 300ms; }

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

.nav__mobile-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--duration-enter) var(--ease-out),
    transform var(--duration-enter) var(--ease-out);
}

.nav__mobile-overlay.is-open .nav__mobile-actions {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 360ms;
}

/* ── Page offset for fixed nav ────────────────────────────── */

.nav-offset {
  padding-top: var(--nav-height);
}

/* ── Responsive ───────────────────────────────────────────── */

@media (max-width: 900px) {
  .nav__links {
    display: none;
  }

  .nav__phone {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile-overlay {
    display: flex;
  }

  .nav__actions .btn {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav__mobile-link {
    font-size: var(--text-2xl);
  }
}