/* Header layout */
.ix-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(10px);
}

.ix-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-16);
  gap: var(--space-16);
}

/* Brand */
.ix-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  text-decoration: none;
}

.ix-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 32% 68% 47% 53% / 44% 47% 53% 56%;
  background: radial-gradient(circle at 30% 20%, var(--color-primary-soft), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
}

.ix-header__logo-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background-color: #fff;
  opacity: 0.9;
}

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

.ix-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

/* Navigation */
.ix-header__nav {
  margin-left: auto;
}

.ix-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ix-header__nav-item {
  position: relative;
}

.ix-header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.4rem 0.2rem;
}

.ix-header__nav-link::after {
  height: 2px;
  bottom: -0.15em;
  border-radius: 999px;
  background-color: var(--color-primary);
}

.ix-header__nav-link:hover,
.ix-header__nav-link:focus-visible {
  color: var(--color-text);
}

.ix-header__nav-item--cta .ix-header__nav-link--btn {
  border-radius: var(--radius-pill);
  padding-inline: 1.1rem;
  padding-block: 0.45rem;
  border: 1px solid var(--color-primary);
  background-color: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-soft);
  text-transform: uppercase;
}

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

.ix-header__nav-item--cta .ix-header__nav-link--btn:hover,
.ix-header__nav-item--cta .ix-header__nav-link--btn:focus-visible {
  background-color: var(--color-primary-strong);
  border-color: var(--color-primary-strong);
}

/* Mobile toggle */
.ix-header__nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
}

.ix-header__nav-toggle-bar {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-fast), top var(--transition-normal), bottom var(--transition-normal);
}

.ix-header__nav-toggle-bar:nth-child(1) {
  top: 13px;
}

.ix-header__nav-toggle-bar:nth-child(2) {
  top: 18px;
}

.ix-header__nav-toggle-bar:nth-child(3) {
  bottom: 13px;
}

.ix-header__nav-toggle[aria-expanded="true"] .ix-header__nav-toggle-bar:nth-child(1) {
  top: 18px;
  transform: rotate(45deg);
}

.ix-header__nav-toggle[aria-expanded="true"] .ix-header__nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.ix-header__nav-toggle[aria-expanded="true"] .ix-header__nav-toggle-bar:nth-child(3) {
  bottom: 19px;
  transform: rotate(-45deg);
}

/* Responsive behavior */
@media (max-width: 768px) {
  .ix-header__inner {
    padding-block: var(--space-12);
  }

  .ix-header__nav-toggle {
    display: inline-flex;
  }

  .ix-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background-color: rgba(0, 0, 0, 0.24);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .ix-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-16);
    margin: var(--space-8) var(--space-16) var(--space-16);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    box-shadow: var(--shadow-medium);
  }

  .ix-header__nav-item--cta {
    margin-top: var(--space-8);
  }

  .ix-header__nav-link {
    padding-block: 0.6rem;
  }

  .ix-header__nav-link::after {
    display: none;
  }

  .ix-header__nav--open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .ix-header__brand-tagline {
    display: none;
  }
}