.hf-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(to bottom, rgba(5, 8, 20, 0.98), rgba(5, 8, 20, 0.92));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.hf-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

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

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

.hf-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle at top left, var(--color-primary), var(--color-accent));
  color: #020617;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
}

.hf-header__logo-text {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.88rem;
}

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

.hf-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.hf-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: none;
}

.hf-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--color-primary), var(--color-accent));
  transition: width var(--transition-base);
}

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

.hf-header__nav-link:hover::after,
.hf-header__nav-link:focus-visible::after {
  width: 100%;
}

.hf-header__nav-item--cta .hf-header__nav-link::after {
  display: none;
}

.hf-header__nav-link--cta {
  padding-inline: 1.2rem;
  padding-block: 0.55rem;
  font-size: 0.78rem;
}

.hf-header__toggle {
  position: relative;
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.55);
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  background-color: rgba(15, 23, 42, 0.9);
  color: var(--gray-50);
}

.hf-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}

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

.hf-header__toggle--open .hf-header__toggle-bar:nth-child(1) {
  transform: rotate(45deg);
  translate: 0 4px;
}

.hf-header__toggle--open .hf-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.hf-header__toggle--open .hf-header__toggle-bar:nth-child(3) {
  transform: rotate(-45deg);
  translate: 0 -4px;
}

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

  .hf-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 3.75rem;
    background: radial-gradient(circle at top left, rgba(14, 165, 233, 0.25), transparent 60%),
                radial-gradient(circle at bottom right, rgba(34, 197, 94, 0.22), transparent 60%),
                rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.35);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
  }

  .hf-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-6);
    gap: 1.1rem;
  }

  .hf-header__nav-link {
    font-size: 0.95rem;
  }

  .hf-header__nav-link--cta {
    width: 100%;
    justify-content: center;
  }

  .hf-header__nav--open {
    transform: translateY(0%);
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .hf-header__logo-text {
    display: none;
  }
}

body.hf-header--menu-open {
  overflow: hidden;
}

.hf-header__nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}