/* Header-specific styles for LEARN ASSIST CENTER */
.lac-header {
  z-index: 50;
}

.lac-header__inner {
  align-items: center;
}

.lac-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.lac-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
}

.lac-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 0, #facc15 0, #f97316 40%, #b91c1c 100%);
  box-shadow: var(--shadow-glow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.lac-header__chip {
  width: 70%;
  height: 70%;
  border-radius: 50%;
  border: 3px solid rgba(15, 23, 42, 0.85);
  box-shadow: 0 0 0 2px rgba(249, 250, 251, 0.1);
}

.lac-header__text {
  display: flex;
  flex-direction: column;
}

.lac-header__name {
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

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

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

.lac-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.lac-header__nav-item {
  list-style: none;
}

.lac-header__nav-cta {
  margin-left: var(--space-8);
}

/* Mobile toggle */
.lac-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.6);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: rgba(15, 23, 42, 0.8);
}

.lac-header__toggle-bar {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}

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

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

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

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

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

  .lac-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    padding-inline: var(--space-8);
  }

  .lac-header__nav-list {
    margin-top: var(--space-4);
    flex-direction: column;
    align-items: stretch;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.98) 0, #020617 60%);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: var(--shadow-md);
    padding: var(--space-10);
    max-height: 0;
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    transition: max-height var(--transition-slow), opacity var(--transition-base), transform var(--transition-base);
  }

  .lac-header__nav-list.lac-header__nav-list--open {
    max-height: 420px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .lac-header__nav-item {
    width: 100%;
  }

  .lac-header__nav-item .nav-link {
    display: block;
    padding-block: 0.35rem;
  }

  .lac-header__nav-cta {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .lac-header__nav-cta .btn {
    width: 100%;
    justify-content: center;
  }
}

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