.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-warm-white);
  border-bottom: var(--border-width-hairline) solid var(--color-line-art);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  min-height: 56px;
}

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

.site-header__brand:hover {
  text-decoration: none;
}

.site-header__logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-overline);
  text-transform: uppercase;
  line-height: 1.2;
  white-space: normal;
  max-width: 160px;
}

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

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

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

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-graphite);
  margin-inline: auto;
  transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle:hover .site-header__toggle-line {
  background-color: var(--color-ink-inverse);
}

.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: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-warm-white);
  border-bottom: var(--border-width-hairline) solid var(--color-line-art);
  padding: var(--space-md);
  max-height: calc(100vh - 56px);
  overflow-y: auto;
  z-index: 999;
  box-shadow: var(--shadow-elevated);
}

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

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

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

.site-header__nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-overline);
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--color-graphite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-terracotta);
  text-decoration: none;
  background-color: var(--color-chalk-stone);
}

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

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

.site-header__cta {
  margin-top: var(--space-md);
  display: block;
  text-align: center;
}

@media (min-width: 1200px) {
  .site-header__inner {
    min-height: 64px;
    padding-inline: var(--container-padding-desktop);
    gap: var(--space-md);
  }

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

  .site-header__brand-text {
    font-size: 14px;
    max-width: none;
    white-space: nowrap;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-sm);
    background-color: transparent;
    border-bottom: none;
    padding: 0;
    max-height: none;
    overflow: visible;
    box-shadow: none;
  }

  .site-header__nav-list {
    flex-direction: row;
    gap: var(--space-md);
    margin: 0;
    padding: 0;
  }

  .site-header__nav-link {
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
  }

  .site-header__nav-link:hover {
    background-color: transparent;
  }

  .site-header__cta {
    margin-top: 0;
    display: inline-block;
    flex-shrink: 0;
    white-space: nowrap;
  }
}

@media (min-width: 1440px) {
  .site-header__inner {
    gap: var(--space-lg);
  }

  .site-header__brand-text {
    font-size: 15px;
  }

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

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