.tx-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(245, 247, 250, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

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

.tx-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  white-space: nowrap;
}

.tx-header__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 30% 0, #60a5fa, #1d4ed8);
  box-shadow: var(--shadow-md);
}

.tx-header__logo-mark {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

.tx-header__brand-text {
  display: flex;
  flex-direction: column;
}

.tx-header__brand-name {
  font-weight: 600;
  letter-spacing: 0.03em;
}

.tx-header__brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.tx-header__nav {
  margin-inline: auto;
}

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

.tx-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
}

.tx-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.tx-header__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.tx-header__icon-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid var(--gray-200);
  color: var(--gray-700);
  background-color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.tx-header__icon-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-soft);
}

.tx-header__cta {
  font-size: var(--font-size-sm);
  padding-inline: var(--space-4);
}

/* Mobile toggle */
.tx-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
}

.tx-header__toggle-bar {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

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

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

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

/* Responsive layout */
@media (max-width: 900px) {
  .tx-header__inner {
    gap: var(--space-2);
  }

  .tx-header__brand-tagline {
    display: none;
  }

  .tx-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 4.25rem;
    background-color: rgba(245, 247, 250, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.25);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

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

  .tx-header__toggle {
    display: inline-flex;
  }

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

  .tx-header__actions {
    gap: var(--space-2);
  }

  .tx-header__cta {
    display: none;
  }
}

@media (max-width: 640px) {
  .tx-header__inner {
    padding-block: var(--space-2);
  }

  .tx-header__actions {
    gap: var(--space-1);
  }

  .tx-header__icon-link {
    width: 2rem;
    height: 2rem;
  }
}