.lsm-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(244, 247, 250, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}

.lsm-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.lsm-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.lsm-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.lsm-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary) 0%, #7fb3d8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.lsm-header__logo-icon {
  color: #ffffff;
  font-size: 1.1rem;
}

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

.lsm-header__site-name {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  line-height: 1.2;
}

.lsm-header__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

.lsm-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.lsm-header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-full);
  transition: color var(--transition-normal), background-color var(--transition-normal);
}

.lsm-header__nav-link:hover,
.lsm-header__nav-link:focus-visible {
  color: var(--color-text);
  background-color: var(--color-primary-soft);
  text-decoration: none;
}

.lsm-header__nav-link--cta {
  padding: 0.5rem 1.25rem;
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.lsm-header__nav-link--cta:hover,
.lsm-header__nav-link--cta:focus-visible {
  background-color: #3f7ca6;
  color: #ffffff;
}

/* Mobile menu toggle */
.lsm-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  cursor: pointer;
}

.lsm-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-700);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

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

/* Toggle animation when menu is open */
.lsm-header__toggle[aria-expanded="true"] .lsm-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

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

.lsm-header__toggle[aria-expanded="true"] .lsm-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive behavior */
@media (max-width: 768px) {
  .lsm-header__toggle {
    display: inline-flex;
  }

  .lsm-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: #ffffff;
    box-shadow: var(--shadow-md);
    transform-origin: top center;
    transform: scaleY(0.96);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .lsm-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-2);
  }

  .lsm-header__nav-item--cta {
    width: 100%;
  }

  .lsm-header__nav-link--cta {
    display: inline-flex;
    width: 100%;
    justify-content: center;
  }

  .lsm-header__nav.is-open {
    opacity: 1;
    transform: scaleY(1);
    pointer-events: auto;
  }
}

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

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