.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 64px;
  padding-block: var(--space-sm);
}

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

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__wordmark {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--color-surface-ivory);
}

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

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

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

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

.site-header__toggle-icon::after {
  bottom: -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 {
  top: 0;
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  bottom: 0;
  transform: rotate(-45deg);
}

.site-header__nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-elevated);
  padding: var(--space-md) var(--container-pad-mobile);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  z-index: 99;
}

.site-header__nav.is-open {
  display: block;
}

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

.site-header__item {
  margin: 0;
}

.site-header__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-small-size);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-ink-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-header__link:hover {
  background-color: var(--color-surface-ivory);
  color: var(--color-accent-gold);
}

.site-header__link:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.site-header__cta {
  margin-top: var(--space-md);
  width: 100%;
  justify-content: center;
}

@media (min-width: 768px) {
  .site-header__inner {
    min-height: 72px;
  }

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

  .site-header__wordmark {
    font-size: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    max-height: none;
    overflow: visible;
    z-index: auto;
  }

  .site-header__list {
    flex-direction: row;
    gap: var(--space-lg);
  }

  .site-header__link {
    padding: var(--space-xs) 0;
    font-size: var(--text-small-size);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-ink-primary);
    border-radius: 0;
    transition: color var(--transition-fast);
    position: relative;
  }

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

  .site-header__link:hover,
  .site-header__link:focus-visible {
    background-color: transparent;
    color: var(--color-accent-gold);
  }

  .site-header__link:hover::after,
  .site-header__link:focus-visible::after {
    transform: scaleX(1);
  }

  .site-header__cta {
    margin-top: 0;
    width: auto;
  }
}