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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter-mobile);
  min-height: 64px;
}

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

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-ink);
  text-decoration: none;
}

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

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: 1px solid var(--color-charcoal-line);
  border-radius: var(--radius-button-tag);
  cursor: pointer;
  color: var(--color-ink);
  transition: background-color var(--transition-color), border-color var(--transition-color), color var(--transition-color);
  flex-shrink: 0;
}

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

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

.site-header__toggle-icon {
  position: relative;
  display: block;
  width: 20px;
  height: 14px;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--transition-color), top var(--transition-color), bottom var(--transition-color);
}

.site-header__toggle-icon::before {
  top: 0;
}

.site-header__toggle-icon::after {
  bottom: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  top: 6px;
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  bottom: 6px;
  transform: rotate(-45deg);
}

.site-header__nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-charcoal-line);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  z-index: 999;
}

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

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

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

.site-header__nav-link {
  display: block;
  padding: var(--space-md) var(--container-gutter-mobile);
  font-family: var(--font-heading);
  font-size: var(--text-label-size);
  line-height: var(--text-label-line-height);
  letter-spacing: var(--text-label-tracking);
  font-weight: var(--text-label-weight);
  text-transform: uppercase;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-charcoal-line);
  transition: color var(--transition-color), background-color var(--transition-color);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-ember);
  background-color: var(--color-paper-deep);
  text-decoration: none;
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-ember);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

@media (min-width: 768px) {
  .site-header__inner {
    padding-inline: var(--container-gutter-tablet);
    min-height: 72px;
  }

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

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

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

  .site-header__nav-link {
    padding-inline: var(--container-gutter-tablet);
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    padding-inline: var(--container-gutter-desktop);
    min-height: 80px;
    gap: var(--space-lg);
  }

  .site-header__logo {
    width: 48px;
    height: 48px;
  }

  .site-header__brand-text {
    font-size: 1.375rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: block;
    position: static;
    background: none;
    border: none;
    max-height: none;
    overflow: visible;
    flex: 1 1 auto;
    min-width: 0;
  }

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

  .site-header__nav-item {
    flex-shrink: 0;
  }

  .site-header__nav-link {
    display: inline-block;
    padding: var(--space-xs) 0;
    border-bottom: none;
    font-size: var(--text-label-size);
    line-height: var(--text-label-line-height);
    letter-spacing: var(--text-label-tracking);
    font-weight: var(--text-label-weight);
    text-transform: uppercase;
    color: var(--color-ink);
    text-decoration: none;
    transition: color var(--transition-color);
  }

  .site-header__nav-link:hover,
  .site-header__nav-link:focus-visible {
    color: var(--color-ember);
    background: none;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 2px;
  }

  .site-header__nav-link[aria-current="page"] {
    color: var(--color-ember);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 2px;
  }
}

@media (min-width: 1280px) {
  .site-header__inner {
    gap: var(--space-xl);
  }

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