/* ============================================================
   Site Header
   Fixed position, transparent over hero, solid when scrolled.
   JS in js/header.js adds .header--scrolled when past hero.
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);   /* 72px */
  background-color: transparent;
  transition: var(--transition-header);
}

/* Scrolled state — added by js/header.js when user scrolls past hero */
.site-header.header--scrolled {
  background-color: var(--color-carbon);
  box-shadow: var(--shadow-header);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ============================================================
   Logo — imagen
   ============================================================ */

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  line-height: 1;
}

.site-logo__img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.site-logo__img--footer {
  height: 44px;
  opacity: 0.9;
}

/* ============================================================
   Desktop navigation
   Hidden on mobile — display flex on desktop (1024px+)
   ============================================================ */

.site-nav {
  display: none;   /* Hidden on mobile — show on desktop */
  align-items: center;
  gap: var(--space-xl);
}

@media (min-width: 1024px) {
  .site-nav {
    display: flex;
  }
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  color: var(--color-white);
  text-decoration: none;
  transition: var(--transition-base);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.site-nav__link:hover {
  color: var(--color-gold-300);
}

/* CTA in header nav — ghost when transparent, primary when scrolled */
.site-nav__cta {
  /* Default: ghost (transparent over hero) — inherits .btn--ghost styles */
}

.header--scrolled .site-nav__cta {
  /* When scrolled: switch to primary gold */
  background-color: var(--color-gold-500);
  color: var(--color-carbon);
  border-color: var(--color-gold-500);
}

.header--scrolled .site-nav__cta:hover {
  background-color: var(--color-gold-300);
  border-color: var(--color-gold-300);
}

/* ============================================================
   Mobile hamburger button
   Visible on mobile, hidden on desktop
   ============================================================ */

.site-nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (min-width: 1024px) {
  .site-nav__hamburger {
    display: none;
  }
}

.site-nav__hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* ============================================================
   Mobile nav overlay
   Full-screen, carbon bg, fade-in via .nav--open class
   ============================================================ */

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: var(--color-carbon);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.mobile-nav.nav--open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav__list {
  list-style: none;
  text-align: center;
  margin: 0 0 var(--space-2xl) 0;
  padding: 0;
}

.mobile-nav__list li + li {
  margin-top: var(--space-xl);
}

/* Mobile nav links — presentational override: Cormorant 28px weight 400 */
.mobile-nav__link {
  font-family: var(--font-heading);
  font-size: 1.75rem;   /* 28px — presentational override per UI-SPEC */
  font-weight: var(--fw-regular);
  color: var(--color-white);
  text-decoration: none;
  transition: var(--transition-base);
}

.mobile-nav__link:hover {
  color: var(--color-gold-300);
}

.mobile-nav__cta {
  margin-top: var(--space-xl);
}