/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: rgba(18, 18, 18, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

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

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  text-decoration: none;
  color: var(--ivory);
  flex-shrink: 0;
}

.brand__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

.brand__text {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
}

/* Navigation toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ivory);
  transition: all var(--transition-fast);
  transform-origin: center;
}

/* Navigation */
.site-nav {
  display: none;
}

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

.site-nav__item {
  margin: 0;
  padding: 0;
}

.site-nav__item + .site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--ivory);
  text-decoration: none;
  padding: var(--space-2xs) 0;
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.site-nav__link:hover {
  color: var(--amber-bright);
  text-decoration: none;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background-color: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--amber);
}

/* Mobile open state */
.site-header.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header.nav-open .site-nav {
  display: block;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(18, 18, 18, 0.98);
  overflow-y: auto;
  padding: var(--space-lg) var(--container-padding-mobile);
  z-index: calc(var(--z-nav) - 1);
}

.site-header.nav-open .site-nav__list {
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-sm);
}

.site-header.nav-open .site-nav__link {
  font-size: 1.25rem;
  padding: var(--space-sm) 0;
}

/* Desktop breakpoint */
@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
  }

  .site-nav__list {
    gap: var(--space-md);
  }

  .site-header.nav-open .site-nav {
    position: static;
    background: transparent;
    padding: 0;
    overflow: visible;
    display: block;
  }

  .site-header.nav-open .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
  }

  .site-header.nav-open .site-nav__link {
    font-size: 0.875rem;
    padding: var(--space-2xs) 0;
  }
}

/* Collision prevention for fixed header */
.site-header + * {
  margin-top: var(--nav-height);
}

@media (max-width: 899px) {
  .site-header + * {
    margin-top: var(--nav-height);
  }
}