.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-frosted);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-copper);
  box-shadow: var(--shadow-soft);
}

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

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

.site-header__brand:hover {
  color: var(--accent-copper-light);
}

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

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: inherit;
  white-space: nowrap;
}

.site-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(200, 125, 85, 0.3);
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: border-color var(--transition-smooth), background-color var(--transition-smooth);
  flex-shrink: 0;
}

.site-header__toggle:hover {
  border-color: var(--accent-copper);
  background-color: rgba(200, 125, 85, 0.05);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--accent-copper);
  outline-offset: 2px;
}

.site-header__toggle[aria-expanded="true"] {
  border-color: var(--accent-copper);
  background-color: rgba(200, 125, 85, 0.1);
}

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--accent-copper);
  border-radius: 1px;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

.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: none;
}

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.site-header__nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-mist);
  text-decoration: none;
  border-radius: var(--radius-small);
  transition: color var(--transition-smooth), background-color var(--transition-smooth);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--accent-copper-light);
  background-color: rgba(200, 125, 85, 0.05);
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--accent-copper);
  outline-offset: 2px;
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  white-space: nowrap;
}

@media (max-width: 1023px) {
  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: #121318;
    background: rgba(18, 19, 24, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(200, 125, 85, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.85);
    padding: var(--space-4) var(--container-padding-mobile) var(--space-6);
    max-height: calc(100vh - 72px);
    max-height: calc(100dvh - 72px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 200;
  }

  .site-header__nav.is-open {
    display: flex;
    flex-direction: column;
    animation: siteHeaderNavOpen 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .site-header__nav-list {
    flex-direction: column;
    gap: var(--space-1);
  }

  .site-header__nav-item {
    border-bottom: 1px solid rgba(200, 125, 85, 0.12);
  }

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

  .site-header__nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-3);
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text-mist);
    border-radius: var(--radius-small);
  }

  .site-header__nav-link:hover,
  .site-header__nav-link:active {
    color: var(--accent-copper-light);
    background-color: rgba(200, 125, 85, 0.08);
  }

  .site-header__nav-item--cta {
    border-bottom: none;
    margin-top: var(--space-4);
    padding-top: var(--space-2);
  }

  .site-header__cta {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    font-size: 0.9375rem;
    font-weight: 600;
  }
}

@keyframes siteHeaderNavOpen {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    min-height: 80px;
    padding-inline: var(--container-padding-desktop);
  }

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

  .site-header__brand-text {
    font-size: 1.5rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    position: static;
    top: auto;
    left: auto;
    right: auto;
    width: auto;
    max-height: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    overflow-y: visible;
    transform: none;
    animation: none;
    align-items: center;
    flex: 1 1 auto;
    justify-content: flex-end;
    z-index: auto;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
  }

  .site-header__nav-item {
    display: flex;
    align-items: center;
    border-bottom: none;
  }

  .site-header__nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: 0.9375rem;
  }

  .site-header__nav-item--cta {
    margin-top: 0;
    margin-left: var(--space-2);
    padding-top: 0;
  }

  .site-header__cta {
    width: auto;
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    min-height: 44px;
  }
}