.rt-site-header {
  position: relative;
  z-index: 70;
  width: 100%;
  border-block-end: 1px solid var(--border-gold);
  background: var(--surface-page);
}

.rt-site-header__ribbon {
  position: relative;
  z-index: 2;
}

.rt-site-header__bar {
  min-height: 5.5rem;
  background: var(--surface-page);
}

.rt-site-header__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(1rem, 1.5vw, 1.75rem);
  width: min(100% - (var(--gutter) * 2), 110rem);
  min-height: 5.5rem;
}

.rt-site-header .rt-brand {
  flex: 0 1 auto;
  margin: 0;
}

.rt-site-header .rt-brand__mark {
  width: 3.25rem;
  height: 3.25rem;
}

.rt-site-header__nav {
  min-width: 0;
  justify-self: end;
}

.rt-site-header__list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.625rem, 0.85vw, 1rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.rt-site-header__list li,
.rt-site-header__list li + li {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
}

.rt-site-header__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-ivory);
  font-size: var(--text-14);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration-color: transparent;
  white-space: nowrap;
}

.rt-site-header__link:hover,
.rt-site-header__link[aria-current="page"] {
  text-decoration-color: var(--color-gold);
}

.rt-site-header__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-3);
}

.rt-site-header__actions .rt-button {
  min-height: 2.75rem;
  white-space: nowrap;
}

.rt-site-header__mobile-action,
.rt-site-header__list li.rt-site-header__mobile-action {
  display: none;
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  gap: 0.3125rem;
  width: 2.75rem;
  min-height: 2.75rem;
  padding: 0.5rem;
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ivory);
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-gold-bright);
  background: var(--surface-raised);
}

.nav-toggle__line {
  display: block;
  width: 1.125rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(0.375rem) 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(-0.375rem) rotate(-45deg);
}

@media (max-width: 1680px) {
  .rt-site-header__inner {
    gap: var(--space-4);
  }

  .rt-site-header__list {
    gap: 0.625rem;
  }

  .rt-site-header__link {
    font-size: var(--text-12);
  }

  .rt-site-header__actions .rt-button {
    padding-inline: 0.875rem;
    font-size: var(--text-12);
  }
}

@media (min-width: 901px) and (max-width: 1480px) {
  .rt-site-header__bar,
  .rt-site-header__inner {
    min-height: 0;
  }

  .rt-site-header__inner {
    grid-template-areas:
      "brand actions"
      "nav nav";
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: var(--space-2);
    padding-block: var(--space-3) var(--space-2);
  }

  .rt-site-header .rt-brand {
    grid-area: brand;
  }

  .rt-site-header__actions {
    grid-area: actions;
  }

  .rt-site-header__nav {
    grid-area: nav;
    justify-self: stretch;
    width: 100%;
    padding-block-start: var(--space-2);
    border-block-start: 1px solid var(--border-neutral);
  }

  .rt-site-header__list {
    justify-content: space-between;
    gap: var(--space-2);
  }

  .rt-site-header__link {
    min-height: 2.25rem;
  }
}

@media (max-width: 900px) {
  .rt-site-header__bar,
  .rt-site-header__inner {
    min-height: 5rem;
  }

  .rt-site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .rt-site-header__nav {
    position: absolute;
    inset: 100% 0 auto;
    z-index: 1;
    display: none;
    width: 100%;
    max-height: min(75vh, calc(100dvh - 5rem));
    overflow-x: hidden;
    overflow-y: auto;
    border-block-end: 1px solid var(--border-gold);
    background: var(--surface-raised);
    box-shadow: var(--shadow-elevated);
  }

  .rt-site-header__nav.is-open {
    display: block;
  }

  .rt-site-header__list {
    display: grid;
    gap: 0;
    width: min(100% - (var(--gutter) * 2), var(--container-max));
    margin: 0 auto;
    padding: var(--space-4) 0 var(--space-6);
  }

  .rt-site-header__list li,
  .rt-site-header__list li + li {
    display: block;
    border-block-end: 1px solid var(--border-neutral);
  }

  .rt-site-header__link {
    display: flex;
    min-height: 3.25rem;
    padding-block: var(--space-2);
    font-size: var(--text-16);
  }

  .rt-site-header__actions {
    display: none;
  }

  .rt-site-header__mobile-action,
  .rt-site-header__list li.rt-site-header__mobile-action {
    display: block;
    padding-block: var(--space-4);
    border-block-end: 0;
  }

  .rt-site-header__mobile-action .rt-button {
    display: flex;
    width: min(100%, 22rem);
  }

  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 540px) {
  .rt-site-header__bar,
  .rt-site-header__inner {
    min-height: 4.5rem;
  }

  .rt-site-header .rt-brand {
    gap: var(--space-2);
  }

  .rt-site-header .rt-brand__mark {
    width: 2.5rem;
    height: 2.5rem;
  }

  .rt-site-header .rt-brand__name {
    font-size: 1.0625rem;
  }

  .rt-site-header__nav {
    max-height: min(75vh, calc(100dvh - 4.5rem));
  }
}

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

ul { list-style: none !important; }
.nav-toggle { flex-direction: column; }