.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-bottom: 1px solid rgb(184 115 76 / 38%);
  background: rgb(23 24 23 / 96%);
  box-shadow: 0 0 0 transparent;
  backdrop-filter: blur(12px);
}

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

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-strong);
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--text-strong);
}

.site-header__logo {
  width: 2.375rem;
  height: 2.375rem;
  flex: 0 0 2.375rem;
  object-fit: contain;
}

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.0625rem;
  line-height: 1;
}

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

.site-header__brand-tagline {
  color: var(--text-muted);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  margin-left: auto;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover,
.site-header__toggle[aria-expanded="true"] {
  border-color: var(--color-copper-300);
  background: var(--surface-card);
}

.nav-toggle__line {
  display: block;
  width: 1.25rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(0.3125rem) rotate(45deg);
}

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

.site-header__toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-0.3125rem) rotate(-45deg);
}

.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: clamp(0.75rem, 1.5vw, 1.5rem);
  margin: 0;
  padding: 0;
}

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

.site-header__nav-link {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: 1px solid transparent;
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__nav-link:hover,
.site-header__nav-link[aria-current="page"] {
  border-color: var(--color-copper-500);
  color: var(--color-copper-300);
}

.site-header__nav-item--mobile {
  display: none;
}

.site-header__contact {
  min-width: max-content;
}

@media (max-width: 67.99rem) {
  .site-header__inner {
    min-height: 4.5rem;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: flex;
    width: 100%;
    max-width: none;
    flex: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-height: min(31rem, calc(100vh - 4.5rem));
    overflow-x: hidden;
    overflow-y: auto;
    padding: var(--space-4) var(--container-padding);
    border-bottom: 1px solid var(--border-default);
    background: var(--surface-card);
    box-shadow: var(--shadow-floating);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.5rem);
    transition: opacity var(--transition-panel), transform var(--transition-panel);
  }

  .site-header__nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-header__nav-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin: 0 auto;
    gap: 0;
    text-align: center;
  }

  .site-header__nav-item {
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .site-header__nav-item--mobile {
    display: flex;
    justify-content: center;
  }

  .site-header__nav-link {
    width: 100%;
    min-height: 3rem;
    justify-content: center;
    text-align: center;
    border-bottom-color: rgb(184 115 76 / 30%);
  }

  .site-header__contact {
    width: auto;
    min-width: 12rem;
    max-width: 100%;
    margin-top: var(--space-3);
    margin-inline: auto;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 29.99rem) {
  .site-header__inner {
    gap: var(--space-3);
  }

  .site-header__logo {
    width: 2rem;
    height: 2rem;
    flex-basis: 2rem;
  }

  .site-header__brand-name {
    font-size: 1.0625rem;
  }

  .site-header__brand-tagline {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav,
  .nav-toggle__line {
    transition: none;
  }
}