.erw-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 6, 8, 0.96), rgba(5, 6, 8, 0.88));
  border-bottom: 1px solid var(--color-border-subtle);
}

.erw-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

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

.erw-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-gray-50);
}

.erw-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, var(--color-primary-strong), var(--color-primary));
  box-shadow: var(--shadow-glow-primary);
}

.erw-header__logo-text {
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
}

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

.erw-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.erw-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.erw-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-strong), transparent);
  transition: width var(--transition-medium);
}

.erw-header__nav-link:hover,
.erw-header__nav-link:focus-visible {
  color: var(--color-gray-50);
}

.erw-header__nav-link:hover::after,
.erw-header__nav-link:focus-visible::after {
  width: 60%;
}

.erw-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.85);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
}

.erw-header__toggle-bar {
  width: 1.4rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-gray-50);
  transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.erw-header__toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.erw-header__toggle--active .erw-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.erw-header__toggle--active .erw-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.erw-header__toggle--active .erw-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 768px) {
  .erw-header__toggle {
    display: inline-flex;
  }

  .erw-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    left: 2%;
    background: radial-gradient(circle at top, rgba(215, 38, 61, 0.18), transparent 55%), var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(1);
  }

  .erw-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--container-padding-x) var(--space-6);
    gap: var(--space-3);
  }

  .erw-header__nav--closed {
    display: none;
  }
}

@media (min-width: 769px) {
  .erw-header__nav {
    position: static;
  }
}