/* =============================================================
   nav.css — Fixed top navigation + mobile hamburger menu
   ============================================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
  background-color: transparent;
  transition: background-color var(--transition-slow),
              box-shadow var(--transition-slow);
}

/* Scrolled / solid state */
.nav.is-scrolled {
  background-color: rgba(245, 240, 238, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(26,26,26,0.08);
}

.nav.is-scrolled .nav__logo {
  color: var(--color-black);
}

.nav.is-scrolled .nav__link {
  color: var(--color-black);
}

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

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition);
  line-height: 1;
}

.nav__logo:hover {
  opacity: 0.85;
}

.nav__logo-img {
  height: 48px;
  width: auto;
  display: block;
  border-radius: var(--radius-md);
}

.nav__logo-img--dark {
  display: none;
}

.nav.is-scrolled .nav__logo-img--white {
  display: none;
}

.nav.is-scrolled .nav__logo-img--dark {
  display: block;
}

/* Nav links wrapper */
.nav__links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--transition), opacity var(--transition);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav__link:hover {
  color: var(--color-white);
  opacity: 1;
}

.nav.is-scrolled .nav__link:hover {
  color: var(--color-accent);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

/* Book Now button */
.nav__cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-white) !important;
  background-color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-pill);
  padding: 0.5rem 1.375rem;
  letter-spacing: 0.02em;
  transition: background-color var(--transition), color var(--transition),
              transform var(--transition), box-shadow var(--transition);
}

.nav__cta::after {
  display: none;
}

.nav__cta:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(26,26,26,0.25);
  opacity: 1 !important;
}

/* Hamburger button */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.nav__hamburger:hover {
  background: rgba(255,255,255,0.1);
}

.nav.is-scrolled .nav__hamburger:hover {
  background: rgba(26,26,26,0.06);
}

.nav__hamburger-line {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--color-white);
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.3s ease, opacity 0.3s ease, background-color var(--transition);
}

.nav.is-scrolled .nav__hamburger-line {
  background-color: var(--color-black);
}

/* Hamburger open state — animate to × */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile menu overlay */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(217, 207, 204, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  z-index: 999;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.nav__mobile-menu.is-open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav__mobile-link {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 5vw, 2rem);
  color: var(--color-black);
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

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

.nav__mobile-cta {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white) !important;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
  padding: 0.875rem 2.5rem;
  transition: background-color var(--transition), transform var(--transition);
  margin-top: 0.5rem;
}

.nav__mobile-cta:hover {
  background-color: var(--color-accent-dark);
  transform: scale(1.02);
}

/* Responsive: show hamburger at mobile */
@media (max-width: 767px) {
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }
}

/* Body scroll lock when menu open */
body.nav-open {
  overflow: hidden;
}