.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-ocean-blue);
  color: var(--color-off-white);
  border-bottom: 1px solid rgba(253, 251, 247, 0.2);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 64px;
  padding-block: var(--space-3);
}

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

.site-header__brand:hover {
  color: var(--color-off-white);
}

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

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border: none;
  border-radius: 0;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 2px solid var(--color-off-white);
  border-radius: var(--radius-small);
  cursor: pointer;
  color: var(--color-off-white);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

.site-header__toggle:hover {
  background-color: rgba(253, 251, 247, 0.1);
  border-color: var(--color-off-white);
}

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

.site-header__toggle-icon {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  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: currentColor;
  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-ocean-blue);
  border-bottom: 1px solid rgba(253, 251, 247, 0.2);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding: var(--space-4) var(--container-gutter) var(--space-6);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.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-2);
}

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

.site-header__nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-off-white);
  text-decoration: none;
  border-radius: var(--radius-small);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-header__nav-link:hover {
  background-color: rgba(253, 251, 247, 0.1);
  color: var(--color-off-white);
}

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

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

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

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

  .site-header__nav {
    max-height: calc(100vh - 72px);
  }
}

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

  .site-header__nav {
    display: block;
    position: static;
    background-color: transparent;
    border-bottom: none;
    max-height: none;
    overflow-y: visible;
    padding: 0;
    box-shadow: none;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-5);
  }

  .site-header__nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: 1rem;
    font-weight: 500;
    white-space: nowrap;
  }

  .site-header__nav-link:hover {
    background-color: transparent;
    color: var(--color-signal-orange);
  }
}