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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
  min-height: 72px;
  gap: var(--space-4);
}

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

.site-header__brand:hover {
  text-decoration: none;
  color: var(--color-royal-blue);
}

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

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-royal-blue);
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-small);
  transition: background-color var(--transition-standard);
}

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

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  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: var(--color-royal-blue);
  border-radius: 1px;
  transition: transform var(--transition-standard), opacity var(--transition-standard);
}

.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;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--touch-target-min-height);
  padding: var(--space-2) 0;
  font-size: var(--text-small-size);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-royal-blue);
  text-decoration: none;
  transition: color var(--transition-standard), text-decoration-color var(--transition-standard);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--color-burgundy);
  text-decoration: underline;
  text-decoration-color: var(--color-burgundy);
  text-underline-offset: 0.2em;
}

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

@media (max-width: 900px) {
  .site-header__inner {
    flex-wrap: wrap;
    min-height: 64px;
  }

  .site-header__brand-text {
    display: none;
  }

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

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-ivory);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
    display: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    z-index: 1001;
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3) var(--container-gutter);
  }

  .site-header__nav-item {
    border-bottom: 1px solid var(--color-border);
  }

  .site-header__nav-item:last-child {
    border-bottom: none;
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    padding: var(--space-3) 0;
    font-size: var(--text-body-size);
    letter-spacing: 0.02em;
    text-transform: none;
  }
}