.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-milky-white);
  border-bottom: 1px solid var(--color-misty-blue-20);
  box-shadow: var(--shadow-soft);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-3);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  min-height: 72px;
}

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

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__nav {
  display: flex;
  align-items: center;
  min-width: 0;
}

.site-header__nav--left {
  justify-content: flex-start;
}

.site-header__nav--right {
  justify-content: flex-end;
}

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

.site-header__nav-list li {
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: inline-block;
  padding: var(--space-2) 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-body);
  line-height: 1.2;
  color: var(--color-graphite);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
  text-underline-offset: 4px;
  text-decoration-color: transparent;
}

.site-header__nav-list a:hover,
.site-header__nav-list a:focus-visible {
  color: var(--color-graphite);
  text-decoration: underline;
  text-decoration-color: var(--color-misty-blue);
}

.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;
  border-radius: var(--radius-small);
  transition: background-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--color-misty-blue-20);
}

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

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-graphite);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.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__mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-milky-white);
  border-bottom: 1px solid var(--color-misty-blue-20);
  box-shadow: var(--shadow-soft);
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  z-index: 999;
}

.site-header__mobile-nav.is-open {
  display: block;
}

.site-header__mobile-list {
  list-style: none !important;
  margin: 0;
  padding: var(--space-3) var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-header__mobile-list li {
  margin: 0;
  padding: 0;
}

.site-header__mobile-list a {
  display: block;
  padding: var(--space-2) 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-body);
  line-height: 1.2;
  color: var(--color-graphite);
  text-decoration: none;
  border-bottom: 1px solid var(--color-misty-blue-20);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__mobile-list a:hover,
.site-header__mobile-list a:focus-visible {
  color: var(--color-graphite);
  border-color: var(--color-soft-sage);
}

@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
  }

  .site-header__nav--left,
  .site-header__nav--right {
    display: none;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__brand {
    justify-self: center;
  }
}

@media (max-width: 768px) {
  .site-header__inner {
    min-height: 64px;
    padding-inline: var(--container-padding-mobile);
  }

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

  .site-header__brand-text {
    font-size: 18px;
  }

  .site-header__mobile-nav {
    max-height: calc(100vh - 64px);
  }

  .site-header__mobile-list {
    padding-inline: var(--container-padding-mobile);
  }
}

@media (max-width: 480px) {
  .site-header__brand-text {
    display: none;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto;
    gap: var(--space-2);
  }

  .site-header__brand {
    justify-self: start;
  }

  .site-header__toggle {
    justify-self: end;
  }
}