.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-limestone);
  border-bottom: 1px solid var(--color-warm-gray);
}

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

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

.site-header__logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

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

.site-header__brand-text {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--color-graphite);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-warm-gray);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--color-off-white);
  border-color: var(--color-graphite);
}

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

.site-header__toggle-line {
  display: block;
  width: 20px;
  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__nav {
  display: block;
  margin-left: auto;
}

.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-block;
  padding-block: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-body-size);
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-graphite);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-forest);
}

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

.site-header__nav-link[aria-current="page"] {
  color: var(--color-forest);
  box-shadow: inset 0 -2px 0 0 var(--color-forest);
}

@media (max-width: 1024px) {
  .site-header__inner {
    padding-inline: var(--container-padding-tablet);
  }
}

@media (max-width: 900px) {
  .site-header__inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-block: var(--space-3);
  }

  .site-header__brand {
    order: 1;
  }

  .site-header__toggle {
    display: flex;
    order: 2;
  }

  .site-header__nav {
    order: 3;
    flex-basis: 100%;
    width: 100%;
    margin-left: 0;
    background-color: var(--color-limestone);
    border-top: 1px solid var(--color-warm-gray);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-header__nav.is-open {
    max-height: 80vh;
    overflow-y: auto;
  }

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

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-body-large-size);
    border-bottom: 1px solid var(--color-warm-gray);
  }

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

@media (max-width: 640px) {
  .site-header__inner {
    padding-inline: var(--container-padding-mobile);
  }

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

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

  .site-header__brand-text {
    font-size: 16px;
  }
}