.ws-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(252, 251, 248, 0.96);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--color-border);
}

.ws-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.ws-header__brand {
  display: flex;
  align-items: center;
}

.ws-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  color: var(--color-text);
}

.ws-header__logo-link::after {
  content: none;
}

.ws-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, var(--color-accent), var(--color-primary));
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
}

.ws-header__text-group {
  display: flex;
  flex-direction: column;
}

.ws-header__site-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ws-header__tagline {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-neutral-600);
}

.ws-header__nav {
  display: flex;
  align-items: center;
}

.ws-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-10);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ws-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral-800);
}

.ws-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.ws-header__nav-link:hover::after,
.ws-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.ws-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(148, 133, 118, 0.4);
  background-color: rgba(252, 251, 248, 0.8);
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.ws-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-neutral-800);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.ws-header__toggle-bar + .ws-header__toggle-bar {
  margin-top: 5px;
}

.ws-header__toggle[aria-expanded="true"] .ws-header__toggle-bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.ws-header__toggle[aria-expanded="true"] .ws-header__toggle-bar:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (max-width: 880px) {
  .ws-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .ws-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: rgba(252, 251, 248, 0.98);
    border-bottom: 1px solid var(--color-border);
    transform-origin: top;
  }

  .ws-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-12) var(--space-16) var(--space-16);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-4px);
    transition: max-height var(--transition-slow), opacity var(--transition-base), transform var(--transition-base);
  }

  .ws-header__nav-list.is-open {
    max-height: 320px;
    opacity: 1;
    transform: translateY(0);
  }

  .ws-header__nav-item + .ws-header__nav-item {
    margin-top: var(--space-6);
  }
}

@media (max-width: 520px) {
  .ws-header__tagline {
    display: none;
  }
}