.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: background-color 0.5s ease, border-color 0.5s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header--scrolled {
  background: color-mix(in srgb, var(--color-background) 90%, transparent);
  backdrop-filter: blur(8px);
  border-bottom-color: var(--color-border);
}

.site-header__nav { padding: 0; }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
  gap: 1rem;
}

.site-logo { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.site-logo:hover { color: var(--color-primary); }

.site-logo__text {
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--color-ivory);
  transition: color 0.2s;
}

.site-logo__image { max-height: 3rem; width: auto; }

.site-nav { display: none; }

@media (min-width: 1024px) {
  .site-nav { display: block; flex: 1; }
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  position: relative;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s;
  padding-bottom: 0.25rem;
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 1px;
  width: 0;
  background: var(--color-primary);
  transition: width 0.2s ease;
}

.site-nav__list a:hover,
.site-nav__list a.is-active {
  color: var(--color-ivory);
}

.site-nav__list a:hover::after { width: 100%; }

.header-actions {
  display: none;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 1024px) {
  .header-actions { display: flex; }
}

.header-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  color: var(--color-ivory);
  background: transparent;
  border: none;
  transition: color 0.2s;
  position: relative;
  text-decoration: none;
}

.header-action-btn:hover { color: var(--color-primary); }
.header-action__icon { width: 1.25rem; height: 1.25rem; }

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: var(--color-ivory);
  cursor: pointer;
  transition: color 0.2s;
}

.menu-toggle:hover { color: var(--color-primary); }

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
}

.menu-toggle__icon { display: block; }
.menu-toggle__icon--close { display: none; }
.site-header.menu-open .menu-toggle__icon--open { display: none; }
.site-header.menu-open .menu-toggle__icon--close { display: block; }

@media (max-width: 1023px) {
  .site-header__inner { position: relative; }

  .site-header.menu-open .site-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: color-mix(in srgb, var(--color-background) 95%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
  }

  .site-header.menu-open .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .site-header.menu-open .header-actions {
    display: flex;
    gap: 0.75rem;
    padding: 0 1.5rem 1rem;
    position: absolute;
    top: calc(100% + 12rem);
    right: 0;
  }
}