.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--bg-surface);
  border-bottom: 2px solid var(--border-subtle);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding-block: var(--space-sm);
}

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

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.2;
  color: var(--text-primary);
  white-space: nowrap;
}

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

.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-md);
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: var(--text-small);
  line-height: 1.4;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-button);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  min-height: 44px;
}

.site-header__nav-link:hover {
  color: var(--accent-primary);
  background-color: rgba(168, 85, 247, 0.08);
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.site-header__nav-link--cta {
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-button);
  background-color: transparent;
}

.site-header__nav-link--cta:hover {
  background-color: var(--accent-primary);
  color: var(--text-on-accent);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-button);
  cursor: pointer;
  padding: 0;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover {
  border-color: var(--accent-secondary);
  background-color: rgba(168, 85, 247, 0.08);
}

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

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  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__mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1001;
  background-color: var(--bg-base);
  padding: var(--space-lg);
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.site-header__mobile-nav[aria-hidden="false"] {
  display: block;
}

.site-header__mobile-nav-inner {
  max-width: 600px;
  margin-inline: auto;
}

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

.site-header__mobile-nav-item {
  margin: 0;
}

.site-header__mobile-nav-link {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  line-height: 1.3;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-button);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__mobile-nav-link:hover {
  color: var(--accent-primary);
  background-color: rgba(168, 85, 247, 0.08);
}

.site-header__mobile-nav-link:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
  }

  .site-header__nav--left,
  .site-header__nav--right {
    display: none;
  }

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

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

@media (max-width: 480px) {
  .site-header__logo {
    width: 36px;
    height: 36px;
  }

  .site-header__brand-text {
    font-size: 18px;
  }

  .site-header__inner {
    min-height: 60px;
  }
}