.site-header {
  background-color: rgba(10, 12, 15, 0.92);
  border-bottom: 1px solid var(--color-deep-gray);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 64px;
  padding-block: var(--space-xs);
}

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

.site-header__brand:hover {
  text-decoration: none;
}

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

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ice-white);
  white-space: nowrap;
}

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

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ice-white);
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.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__toggle:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 2px;
}

.site-header__nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

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

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

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-2xs) 0;
  font-family: var(--font-body);
  font-size: var(--text-body-small-size);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-ice-white);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

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

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

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

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-steel);
    border-bottom: 1px solid var(--color-deep-gray);
    box-shadow: var(--shadow-large);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    display: none;
    padding: var(--space-sm) var(--container-padding-mobile);
  }

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

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

  .site-header__nav-link {
    display: block;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-body-size);
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    min-height: 72px;
  }

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

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

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