/* ============================================================
   HIGH BROW SOCIETY - Header / Navigation
   Transparent + light over the hero image; condenses to a
   blurred ivory bar with dark text once the page is scrolled.
   ============================================================ */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex;
  align-items: center;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-med) var(--ease-out),
              border-color var(--dur-med) var(--ease-out),
              backdrop-filter var(--dur-med) var(--ease-out),
              box-shadow var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out),
              height var(--dur-med) var(--ease-out);
}
/* slide out of view when scrolling down the page */
.site-header.is-hidden { transform: translateY(-100%); }

.site-header.is-scrolled {
  height: clamp(62px, 5vw, 78px);
  background-color: rgba(250, 246, 239, 0.9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--color-line-soft);
  box-shadow: 0 10px 40px -34px rgba(41, 37, 31, 0.6);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-md);
}

/* --- Logo --- */
.brand {
  display: inline-flex;
  align-items: center;
  z-index: calc(var(--z-menu) + 1); /* above the mobile overlay */
}
.brand__logo {
  height: clamp(30px, 1.6vw + 1rem, 42px);
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
  transition: filter var(--dur-med) var(--ease-out), height var(--dur-med) var(--ease-out);
}
.site-header.is-scrolled .brand__logo,
body.is-locked .brand__logo {
  filter: none;
}

/* --- Desktop navigation --- */
.nav { display: none; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 0.5rem + 2vw, 2.75rem);
}

.nav__link {
  position: relative;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: rgba(250, 246, 239, 0.82);
  padding: 0.5em 0;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-champagne);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-med) var(--ease-out);
}
.nav__link:hover,
.nav__link[aria-current="page"] { color: var(--color-ivory); }
.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}
.site-header.is-scrolled .nav__link { color: var(--color-charcoal-soft); }
.site-header.is-scrolled .nav__link:hover,
.site-header.is-scrolled .nav__link[aria-current="page"] { color: var(--color-charcoal); }

/* --- Header CTA (adaptive) --- */
.header__actions {
  display: none;
  align-items: center;
  gap: var(--space-sm);
}
.site-header__cta {
  background-color: transparent;
  color: var(--color-ivory);
  border: 1px solid rgba(250, 246, 239, 0.5);
}
.site-header__cta:hover {
  background-color: var(--color-ivory);
  color: var(--color-charcoal);
  border-color: var(--color-ivory);
}
.site-header.is-scrolled .site-header__cta {
  background-color: var(--color-charcoal);
  color: var(--color-ivory);
  border-color: var(--color-charcoal);
}
.site-header.is-scrolled .site-header__cta:hover {
  background-color: var(--color-champagne-deep);
  border-color: var(--color-champagne-deep);
  color: var(--color-white);
}

/* --- Mobile menu toggle --- */
.nav-toggle {
  --bar: 1.5px;
  position: relative;
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  z-index: calc(var(--z-menu) + 1);
}
.nav-toggle__box { position: relative; width: 26px; height: 14px; }
.nav-toggle__box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: var(--bar);
  background: var(--color-ivory);
  transition: transform var(--dur-med) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out),
              top var(--dur-med) var(--ease-out),
              background-color var(--dur-med) var(--ease-out);
}
.site-header.is-scrolled .nav-toggle__box span,
body.is-locked .nav-toggle__box span,
.nav-toggle[aria-expanded="true"] .nav-toggle__box span { background: var(--color-charcoal); }
.nav-toggle__box span:nth-child(1) { top: 0; }
.nav-toggle__box span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.nav-toggle__box span:nth-child(3) { top: auto; bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(1) {
  top: 50%; transform: translateY(-50%) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(3) {
  top: 50%; bottom: auto; transform: translateY(-50%) rotate(-45deg);
}

/* --- Mobile menu overlay --- */
.mobile-menu__close {
  position: absolute;
  top: calc((var(--header-h) - 44px) / 2 + 4px);
  right: var(--gutter);
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--color-charcoal);
  cursor: pointer;
  z-index: 1;
}
.mobile-menu__close svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}
.mobile-menu__close:focus-visible {
  outline: 2px solid var(--color-champagne);
  outline-offset: 2px;
}
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background-color: var(--color-ivory);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: calc(var(--header-h) + var(--space-sm)) var(--gutter) var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out),
              visibility 0s linear var(--dur-med);
}
.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: clamp(0.4rem, 0.2rem + 1vw, 1rem);
}
.mobile-menu__link {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 1.3rem + 2vw, 2.5rem);
  font-weight: 400;
  color: var(--color-charcoal);
  letter-spacing: var(--ls-tight);
  opacity: 0;
  transform: translateY(14px);
}
.mobile-menu.is-open .mobile-menu__link {
  animation: menuItemIn var(--dur-med) var(--ease-out) forwards;
}
.mobile-menu.is-open .mobile-menu__link:nth-child(1) { animation-delay: 90ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(2) { animation-delay: 150ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(3) { animation-delay: 210ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(4) { animation-delay: 270ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(5) { animation-delay: 330ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(6) { animation-delay: 390ms; }

.mobile-menu__footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.mobile-menu__contact {
  font-size: 0.95rem;
  letter-spacing: var(--ls-wide);
  color: var(--color-charcoal-soft);
}
.mobile-menu__contact span {
  display: block;
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-champagne-deep);
  margin-bottom: 0.4em;
}

@keyframes menuItemIn {
  to { opacity: 1; transform: translateY(0); }
}

/* --- Desktop layout switch --- */
@media (min-width: 880px) {
  .nav { display: block; }
  .header__actions { display: flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none; }
}

/* ============================================================
   Inner pages: solid header from the top (no dark hero behind)
   Add class="inner-page" to <body>.
   ============================================================ */
body.inner-page .site-header {
  height: clamp(62px, 5vw, 78px);
  background-color: rgba(250, 246, 239, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--color-line-soft);
  box-shadow: 0 10px 40px -34px rgba(42, 30, 22, 0.55);
}
body.inner-page .brand__logo { filter: none; }
body.inner-page .nav__link { color: var(--color-charcoal-soft); }
body.inner-page .nav__link:hover,
body.inner-page .nav__link[aria-current="page"] { color: var(--color-charcoal); }
body.inner-page .site-header__cta {
  background-color: var(--color-charcoal);
  color: var(--color-ivory);
  border-color: var(--color-charcoal);
}
body.inner-page .site-header__cta:hover {
  background-color: var(--color-champagne-deep);
  border-color: var(--color-champagne-deep);
}
body.inner-page .nav-toggle__box span { background: var(--color-charcoal); }

/* ============================================================
   NAV SERVICES DROPDOWN (desktop) + MOBILE TREATMENTS GROUP
   ============================================================ */

/* --- Desktop: parent item (no chevron; the whole word is the trigger) --- */
.nav__item--has-sub { position: relative; }

/* --- Desktop: dropdown panel --- */
.nav__sub {
  position: absolute;
  top: 100%;
  left: 0;
  transform: translateY(12px);
  min-width: 17.5rem;
  padding: 0.55rem;
  background: var(--color-ivory);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              visibility 0s linear var(--dur-fast);
  z-index: 60;
}
.nav__sub::before { /* hover bridge across the gap */
  content: "";
  position: absolute;
  top: -14px;
  left: 0;
  right: 0;
  height: 14px;
}
.nav__item--has-sub:hover .nav__sub,
.nav__item--has-sub:focus-within .nav__sub {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s;
}
/* flat single column of treatment names, set in the brand serif */
.nav__sub a:not(.nav__sub-all) {
  display: block;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.05rem;
  line-height: 1.2;
  letter-spacing: var(--ls-tight);
  color: var(--color-charcoal);
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.nav__sub a:not(.nav__sub-all):hover {
  background: var(--color-cream);
  color: var(--color-champagne-deep);
}

/* All treatments: a quiet eyebrow-style action beneath a hairline divider */
.nav__sub-all {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.45rem;
  padding: 0.7rem 0.85rem 0.35rem;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-sans);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-champagne-deep);
  text-decoration: none;
}
.nav__sub-all span {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav__sub-all:hover span { transform: translateX(4px); }

/* --- Mobile: treatments group (native <details> accordion) --- */
.mobile-menu__group { list-style: none; }
.mobile-menu__group details { width: 100%; }
.mobile-menu__summary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  list-style: none;
}
.mobile-menu__summary::-webkit-details-marker { display: none; }
.mobile-menu__summary::after {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-4px) rotate(45deg);
  opacity: 0.5;
  transition: transform var(--dur-fast) var(--ease-out);
}
.mobile-menu__group details[open] .mobile-menu__summary::after {
  transform: translateY(0) rotate(225deg);
}
.mobile-menu__sub {
  list-style: none;
  margin: 0.9rem 0 0.4rem;
  padding: 0 0 0 1.1rem;
  border-left: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.mobile-menu__sub li { margin: 0; }
.mobile-menu__sub li a {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-charcoal-soft);
  text-decoration: none;
}
.mobile-menu__sub li a:hover { color: var(--color-champagne-deep); }

@media (prefers-reduced-motion: reduce) {
  .nav__sub { transition: opacity var(--dur-fast) var(--ease-out), visibility 0s linear var(--dur-fast); transform: translateY(0); }
  .nav__item--has-sub:hover .nav__sub,
  .nav__item--has-sub:focus-within .nav__sub { transform: translateY(0); }
}