.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-warm-white);
  border-bottom: 1px solid var(--color-border-light);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 72px;
  padding-block: var(--space-sm);
}

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

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

.site-header__brand-text {
  font-family: var(--font-handwritten);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--color-ink-navy);
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  padding: var(--space-sm);
  border: 1px solid var(--color-border-light);
  border-radius: var(--surface-button-radius);
  background-color: transparent;
  color: var(--color-ink-navy);
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive);
}

.site-header__toggle:hover {
  background-color: var(--color-aqua);
  border-color: var(--color-aqua);
  color: var(--color-ink-navy);
}

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

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}

.site-header__toggle-icon {
  position: relative;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.site-header__toggle-icon::before {
  top: -7px;
}

.site-header__toggle-icon::after {
  top: 7px;
}

.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(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  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;
  flex-wrap: wrap;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-ink-navy);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--surface-button-radius);
  transition: color var(--transition-interactive), background-color var(--transition-interactive);
}

.site-header__nav-link:hover {
  color: var(--color-ocean-blue);
  background-color: rgba(30, 144, 255, 0.08);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-outline-width) var(--focus-outline-style) var(--focus-outline-color);
  outline-offset: 2px;
}

@media (max-width: 1024px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-warm-white);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height var(--transition-interactive), visibility var(--transition-interactive);
  }

  .site-header__nav.is-open {
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    visibility: visible;
  }

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

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

  .site-header__nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    white-space: normal;
  }
}

@media (max-width: 480px) {
  .site-header__inner {
    min-height: 64px;
  }

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

  .site-header__brand-text {
    font-size: 1.25rem;
  }

  .site-header__toggle {
    width: 44px;
    height: 44px;
  }

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