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

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

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

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-ember-gold);
}

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

.site-header__brand-text {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
  color: inherit;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-rune-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover {
  border-color: var(--color-royal-blue);
}

.site-header__toggle:focus-visible {
  outline: var(--shadow-focus);
  outline-offset: 2px;
}

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-mist);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity 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: 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: 44px;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-mist);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-ember-gold);
  border-bottom-color: var(--color-glowing-gold);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-glowing-gold);
  border-bottom-color: var(--color-glowing-gold);
}

@media (max-width: 767px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-header__logo {
    width: 36px;
    height: 36px;
  }

  .site-header__brand-text {
    font-size: 0.75rem;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-obsidian);
    border-bottom: var(--border-default);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-medium);
    z-index: 999;
  }

  .site-header__nav.is-open {
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-md) var(--container-padding-mobile);
  }

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

  .site-header__nav-link {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-rune-line);
    font-size: var(--text-body);
    letter-spacing: 0.02em;
    text-transform: none;
  }

  .site-header__nav-link:hover,
  .site-header__nav-link:focus-visible {
    border-bottom-color: var(--color-glowing-gold);
  }

  .site-header__nav-link[aria-current="page"] {
    border-bottom-color: var(--color-glowing-gold);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .site-header__inner {
    gap: var(--space-sm);
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: 0.8125rem;
  }

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

  .site-header__nav-link {
    padding: var(--space-xs) var(--space-xs);
    font-size: 0.8125rem;
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    padding-inline: var(--container-padding-desktop);
  }
}