.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-graphite-black);
  border-bottom: var(--border-thin) solid var(--color-brushed-champagne);
  height: var(--header-height, 72px);
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
  min-width: 0;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-warm-ivory);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__brand:hover {
  color: var(--color-warm-ivory);
  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: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-warm-ivory);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-warm-ivory);
  transition: transform var(--transition-duration) var(--transition-timing),
    opacity var(--transition-duration) var(--transition-timing);
}

.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: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

.site-header__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.site-header__item {
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.site-header__item + .site-header__item {
  margin: 0;
}

.site-header__link {
  display: inline-block;
  padding: var(--space-2) 0;
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  letter-spacing: var(--text-body-letter-spacing);
  color: var(--color-warm-ivory);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-duration) var(--transition-timing);
  position: relative;
}

.site-header__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-brushed-champagne);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-duration) var(--transition-timing);
}

.site-header__link:hover {
  color: var(--color-warm-ivory);
  text-decoration: none;
}

.site-header__link:hover::after {
  transform: scaleX(1);
}

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

@media (max-width: 1023px) {
  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: var(--header-height, 72px);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-graphite-black);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: var(--space-4);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-duration) var(--transition-timing);
    visibility: hidden;
    z-index: 999;
  }

  .site-header__nav[data-header-nav].is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-header__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    width: 100%;
  }

  .site-header__item {
    flex-shrink: 0;
  }

  .site-header__link {
    display: block;
    padding: var(--space-3) 0;
    font-size: var(--text-body-large-size);
    line-height: var(--text-body-large-line-height);
    letter-spacing: var(--text-body-large-letter-spacing);
    border-bottom: var(--border-thin) solid var(--color-brushed-champagne);
  }

  .site-header__link::after {
    display: none;
  }
}

@media (max-width: 767px) {
  .site-header {
    height: 64px;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }

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

  .site-header__nav {
    top: 64px;
  }
}