.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(18px);
  background: radial-gradient(circle at top, rgba(11, 13, 16, 0.96) 0, rgba(5, 7, 11, 0.98) 55%, rgba(3, 4, 7, 0.98) 100%);
  border-bottom: 1px solid rgba(216, 184, 116, 0.22);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1rem;
}

.site-header-brand {
  text-decoration: none;
}

.site-header-brand:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-item a {
  position: relative;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-block: 0.35rem;
}

.nav-item a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(216, 184, 116, 0.85), transparent);
  transition: width var(--transition-base);
}

.nav-item a:hover,
.nav-item a:focus-visible {
  color: var(--color-text);
}

.nav-item a:hover::after,
.nav-item a:focus-visible::after {
  width: 100%;
}

.nav-item.nav-highlight a {
  padding-inline: 0.95rem;
  padding-block: 0.4rem;
  border-radius: 999px;
  border: 1px solid rgba(16, 185, 129, 0.7);
  background: radial-gradient(circle at top left, rgba(16, 185, 129, 0.24) 0, rgba(5, 7, 11, 0.95) 55%, rgba(5, 7, 11, 1) 100%);
  color: var(--color-text);
}

.nav-item.nav-highlight a::after {
  display: none;
}

.nav-item.nav-highlight a:hover,
.nav-item.nav-highlight a:focus-visible {
  border-color: rgba(216, 184, 116, 0.9);
  box-shadow: 0 0 0 1px rgba(216, 184, 116, 0.4);
}

.nav-toggle {
  border: 1px solid rgba(216, 184, 116, 0.35);
  background: rgba(10, 22, 19, 0.95);
  border-radius: 999px;
  padding: 0.5rem;
  gap: 5px;
  justify-content: center;
  align-items: center;
  display: none;
  cursor: pointer;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.nav-toggle:hover {
  border-color: rgba(216, 184, 116, 0.7);
  background: rgba(16, 26, 23, 0.98);
}

.nav-toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: rgba(244, 238, 221, 0.95);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.35s ease;
}

.site-header.menu-open .nav-toggle-bar:nth-child(1),
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
  background: #D8B874;
}

.site-header.menu-open .nav-toggle-bar:nth-child(2),
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
  background: #D8B874;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (max-width: 860px) {
  .site-header {
    position: sticky;
    top: 0;
    z-index: 90;
  }

  .site-header-inner {
    padding-block: 0.65rem;
    padding-inline: 1rem;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    width: 42px;
    height: 42px;
    padding: 0;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    padding: 0.75rem 1rem 1rem;
    background: radial-gradient(circle at top, rgba(11, 13, 16, 0.98) 0, rgba(5, 7, 11, 0.99) 70%, #030407 100%);
    border-bottom: 1px solid rgba(216, 184, 116, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .site-header.menu-open .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-primary {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 0.5rem;
    width: 100%;
  }

  .nav-item a {
    display: block;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    letter-spacing: 0.16em;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  .nav-item a:hover {
    background: rgba(216, 184, 116, 0.08);
  }

  .nav-item.nav-highlight a {
    width: 100%;
    text-align: center;
    justify-content: center;
    margin-top: 0.5rem;
    padding-block: 0.75rem;
  }
}

@media (max-width: 640px) {
  .rt-ribbon-inner {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: 0.3rem;
    padding-block: 0.4rem;
    padding-inline: 0.75rem;
  }

  .rt-ribbon-status {
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
  }

  .rt-ribbon-meta {
    justify-content: center;
    font-size: 0.65rem;
    gap: 0.4rem 0.75rem;
  }

  .site-header-brand .rt-brand-name {
    font-size: 0.88rem;
    letter-spacing: 0.14em;
  }

  .site-header-brand .rt-brand-tagline {
    font-size: 0.62rem;
    letter-spacing: 0.12em;
  }
}