.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  border-bottom: 1px solid rgba(243, 229, 171, 0.14);
  background: rgba(10, 10, 12, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  gap: var(--space-3);
}

.site-header__brand,
.site-footer__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-platinum);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__logo {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 auto;
  object-fit: contain;
}

.site-header__toggle,
.site-header__nav-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-slate-800);
  color: var(--color-light-champagne);
}

.site-header__toggle {
  position: relative;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  margin-left: auto;
}

.site-header__toggle-line {
  position: absolute;
  left: 50%;
  width: 1.125rem;
  height: 1px;
  background: currentColor;
  transform: translateX(-50%);
  transform-origin: center;
  transition: transform var(--transition-fast), opacity 120ms ease;
}

.site-header__toggle-line:nth-child(1) {
  top: calc(50% - 0.375rem);
}

.site-header__toggle-line:nth-child(2) {
  top: 50%;
}

.site-header__toggle-line:nth-child(3) {
  top: calc(50% + 0.375rem);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateX(-50%) translateY(0.375rem) 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: translateX(-50%) translateY(-0.375rem) rotate(-45deg);
}

.site-header__navigation {
  position: fixed;
  z-index: 910;
  top: 0;
  right: 0;
  display: flex;
  width: min(calc(100% - 1.5rem), 25rem);
  height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  flex-direction: column;
  gap: var(--space-6);
  border-left: 1px solid var(--color-border-subtle);
  background: var(--color-graphite-900);
  box-shadow: var(--shadow-soft);
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  clip-path: inset(0 0 0 100%);
  transition: clip-path 280ms cubic-bezier(0.22, 1, 0.36, 1), opacity 180ms ease, visibility 0s linear 280ms;
  visibility: hidden;
  will-change: clip-path, opacity;
}

.site-header__navigation.is-open {
  opacity: 1;
  pointer-events: auto;
  clip-path: inset(0);
  transition: clip-path 280ms cubic-bezier(0.22, 1, 0.36, 1), opacity 180ms ease, visibility 0s;
  visibility: visible;
}

.site-header__backdrop {
  position: fixed;
  z-index: 905;
  inset: 0;
  background: rgba(0, 0, 0, 0.52);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease, visibility 0s linear 220ms;
  visibility: hidden;
}

.site-header__backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 220ms ease, visibility 0s;
  visibility: visible;
}

.site-header__nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-header__nav-title {
  color: var(--color-light-champagne);
  font-family: var(--font-heading);
  font-weight: 800;
}

.site-header__nav-close {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.75rem;
  line-height: 1;
}

.site-header__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__nav-list a,
.site-header__contact {
  display: block;
  border-left: 1px solid transparent;
  padding: 0.625rem 0.75rem;
  color: var(--color-platinum);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a:focus-visible,
.site-header__contact:hover,
.site-header__contact:focus-visible {
  border-color: var(--color-champagne-gold);
  color: var(--color-light-champagne);
}

.site-header__actions,
.site-header__contact,
.site-header__cta {
  display: none;
}

.site-header__mobile-cta {
  margin-top: auto;
}

.site-header__mobile-only,
.site-header__mobile-contact {
  display: list-item;
}

body.site-header-menu-open {
  overflow: hidden;
}

@media (min-width: 73rem) {
  .site-header__inner {
    min-height: 5.25rem;
    gap: var(--space-4);
  }

  .site-header__logo {
    width: 2.625rem;
    height: 2.625rem;
  }

  .site-header__brand {
    font-size: 1.2rem;
  }

  .site-header__toggle,
  .site-header__nav-head,
  .site-header__mobile-cta {
    display: none;
  }

  .site-header__navigation {
    position: static;
    display: block;
    width: auto;
    height: auto;
    overflow: visible;
    flex: 1 1 auto;
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
    opacity: 1;
    pointer-events: auto;
    clip-path: none;
    transition: none;
    visibility: visible;
    will-change: auto;
  }

  .site-header__backdrop {
    display: none;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 0;
  }

  .site-header__nav-list a,
  .site-header__contact {
    padding: 0.5rem 0.5rem;
    font-size: 0.75rem;
  }

  .site-header__mobile-only,
  .site-header__mobile-contact {
    display: none;
  }

  .site-header__actions {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: var(--space-2);
  }

  .site-header__contact,
  .site-header__cta {
    display: inline-flex;
  }

  .site-header__cta {
    padding: 0.625rem 0.75rem;
    font-size: 0.7rem;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__navigation,
  .site-header__toggle-line,
  .site-header__backdrop {
    transition: none;
  }
}