.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-obsidian);
  border-bottom: var(--border-subtle);
}

.site-header__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 72px;
}

@media (min-width: 768px) {
  .site-header__inner {
    padding-inline: var(--container-padding-desktop);
  }
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-crisp-white);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__brand:hover {
  color: var(--color-champagne-gold);
}

.site-header__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .site-header__logo {
    width: 36px;
    height: 36px;
  }
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-midnight-slate);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.site-header__toggle:hover {
  border-color: var(--color-champagne-gold);
  background-color: var(--color-charcoal);
}

.site-header__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-crisp-white);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

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

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 var(--space-xs);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-crisp-white);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-champagne-gold);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-button);
}

.site-header__close {
  display: none;
}

@media (max-width: 991px) {
  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    max-width: 100%;
    background-color: var(--color-charcoal);
    border-left: var(--border-subtle);
    box-shadow: var(--shadow-modal);
    transform: translateX(100%);
    transition: transform var(--transition-fast);
    z-index: 1001;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-xl) var(--space-lg);
  }

  .site-header__close {
    display: flex;
    position: relative;
    align-self: flex-end;
    width: 48px;
    height: 48px;
    margin: calc(var(--space-sm) * -1) calc(var(--space-sm) * -1) var(--space-lg) 0;
    padding: 0;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-midnight-slate);
    border-radius: var(--radius-button);
    cursor: pointer;
  }

  .site-header__close:hover {
    border-color: var(--color-champagne-gold);
    background-color: var(--color-midnight-slate);
  }

  .site-header__close:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-ring-offset);
  }

  .site-header__close span {
    position: absolute;
    width: 24px;
    height: 2px;
    border-radius: 1px;
    background-color: var(--color-crisp-white);
  }

  .site-header__close span:first-child {
    transform: rotate(45deg);
  }

  .site-header__close span:last-child {
    transform: rotate(-45deg);
  }

  .site-header__nav[data-open="true"] {
    transform: translateX(0);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
    width: 100%;
  }

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: var(--space-sm) var(--space-md);
    font-size: 1.125rem;
    border-radius: var(--radius-button);
  }

  .site-header__nav-link:hover {
    background-color: var(--color-midnight-slate);
    color: var(--color-amber-glow);
  }
}

@media (min-width: 992px) {
  .site-header__nav {
    position: static;
    transform: none;
    transition: none;
    overflow: visible;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    width: auto;
    flex-direction: row;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-lg);
  }

  .site-header__nav-item {
    width: auto;
  }

  .site-header__nav-link {
    display: inline-flex;
    width: auto;
    min-height: 48px;
    padding: 0 var(--space-xs);
    font-size: 0.9375rem;
  }

  .site-header__nav-link:hover {
    background: none;
    color: var(--color-champagne-gold);
  }
}

@media (max-width: 991px) {
  .site-header__nav::before {
    content: '';
    position: fixed;
    inset: 0;
    background-color: rgba(10, 11, 13, 0.6);
    z-index: -1;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
  }

  .site-header__nav[data-open="true"]::before {
    opacity: 1;
    pointer-events: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav,
  .site-header__toggle-line,
  .site-header__nav::before {
    transition-duration: 0.01ms;
  }
}