.site-header {
  position: sticky;
  z-index: 800;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--color-line);
  background: rgba(250, 248, 245, 0.96);
  box-shadow: 0 1px 0 rgba(28, 25, 23, 0.01);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: flex;
  min-width: 0;
  height: 4.75rem;
  align-items: center;
  gap: var(--space-5);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-ink);
  text-decoration: none;
}

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

.site-header__logo {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  object-fit: contain;
}

.site-header__brand-text {
  overflow: hidden;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 1.125rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list li,
.site-header__nav-list li + li {
  display: flex;
  min-width: 0;
  align-items: center;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-link::after {
  position: absolute;
  right: 0;
  bottom: 0.35rem;
  left: 0;
  height: 2px;
  background: var(--color-teal);
  content: "";
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible,
.site-header__nav-link[aria-current="page"] {
  color: var(--color-ink);
  text-decoration: none;
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after,
.site-header__nav-link[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-header__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
}

.site-header__reserve {
  min-height: 42px;
  padding: 0.625rem 0.875rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 44px;
  min-height: 44px;
  flex: 0 0 44px;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: 0;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--color-teal);
  background: var(--color-teal-tint);
}

.nav-toggle__line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 980px) {
  .site-header__inner {
    height: 4rem;
    gap: var(--space-3);
  }

  .site-header__logo {
    width: 2.125rem;
    height: 2.125rem;
    flex-basis: 2.125rem;
  }

  .site-header__brand-text {
    font-size: 0.9375rem;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 1px);
    right: var(--gutter);
    left: var(--gutter);
    display: none;
    max-height: calc(100vh - 5rem);
    overflow-y: auto;
    align-items: stretch;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-ambient);
    padding: var(--space-3);
  }

  .site-header__nav.is-open {
    display: flex;
    flex-direction: column;
  }

  .site-header__nav-list {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header__nav-list li {
    width: 100%;
  }

  .site-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    border-bottom: 1px solid var(--color-line);
    padding: 0 var(--space-3);
  }

  .site-header__nav-link::after {
    right: auto;
    bottom: 0;
    left: var(--space-3);
    width: 1.5rem;
  }

  .site-header__actions {
    width: 100%;
    padding: var(--space-2) var(--space-3) var(--space-1);
  }

  .site-header__reserve {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .site-header__brand {
    gap: var(--space-2);
  }

  .site-header__brand-text {
    max-width: 10.5rem;
  }
}