.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--bg-deep);
  border-bottom: 1px solid rgba(255, 0, 255, 0.3);
  box-shadow: 0 0 20px rgba(255, 0, 255, 0.15);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  min-height: 80px;
}

.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__nav--left {
  justify-content: flex-start;
}

.site-header__nav--right {
  justify-content: flex-end;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list li {
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: var(--weight-h3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  white-space: nowrap;
  transition: color var(--transition-color), text-shadow var(--transition-glow);
}

.site-header__nav-list a:hover {
  color: var(--accent-cyan);
  text-shadow: var(--glow-cyan);
}

.site-header__nav-list a:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  min-width: 0;
  flex-shrink: 0;
}

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

.site-header__logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--weight-h1);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 0, 255, 0.5);
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: border-color var(--transition-color), box-shadow var(--transition-glow);
}

.site-header__toggle:hover {
  border-color: rgba(255, 0, 255, 0.8);
  box-shadow: var(--glow-fuchsia);
}

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

.site-header__toggle[aria-expanded="true"] {
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
}

.site-header__toggle-icon {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: background-color var(--transition-color);
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-transform), background-color var(--transition-color);
}

.site-header__toggle-icon::before {
  top: -6px;
}

.site-header__toggle-icon::after {
  top: 6px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
  background-color: var(--accent-cyan);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
  background-color: var(--accent-cyan);
}

.site-header__mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-deep);
  border-bottom: 1px solid rgba(255, 0, 255, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  max-height: calc(100vh - 100%);
  overflow-y: auto;
  z-index: 1001;
}

.site-header__mobile-nav.is-open {
  display: block;
}

.site-header__mobile-list {
  list-style: none;
  margin: 0;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-header__mobile-list li {
  margin: 0;
}

.site-header__mobile-list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-body);
  font-weight: var(--weight-h3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  border-radius: var(--radius-small);
  transition: background-color var(--transition-color), color var(--transition-color), box-shadow var(--transition-glow);
}

.site-header__mobile-list a:hover {
  background-color: rgba(255, 0, 255, 0.1);
  color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
}

.site-header__mobile-list a:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

@media (max-width: 62rem) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--space-3);
  }

  .site-header__nav {
    display: none;
  }

  .site-header__brand {
    justify-self: center;
  }

  .site-header__toggle {
    display: inline-flex;
    justify-self: end;
  }
}

@media (max-width: 48rem) {
  .site-header__inner {
    min-height: 64px;
    padding-inline: 1rem;
  }

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

  .site-header__brand-text {
    display: none;
  }
}