.nav-lab-hero {
  background: linear-gradient(135deg, #1f2937 0%, #374151 55%, #111827 100%);
  color: #fff;
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.nav-lab-hero__title {
  margin: 0 0 0.85rem;
  color: #fff;
}

.nav-lab-hero__lead {
  margin: 0;
  max-width: 64ch;
  color: rgba(255, 255, 255, 0.9);
}

@media (min-width: 64rem) {
  .site-header--mega-demo .site-header__menu > li.has-mega-menu {
    position: static;
  }

  .site-header--mega-demo .site-header__menu > li.has-mega-menu > .submenu.submenu--mega {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: min(78rem, calc(100vw - 3rem));
    padding: 1rem;
    border-radius: 0.9rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(14rem, 1.2fr);
    gap: 0.9rem;
  }

  .site-header--mega-demo .submenu--mega__col,
  .site-header--mega-demo .submenu--mega__focus {
    list-style: none;
    margin: 0;
    padding: 0.85rem 0.95rem;
    border-radius: 0.75rem;
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.08);
  }

  .site-header--mega-demo .submenu--mega__col h3,
  .site-header--mega-demo .submenu--mega__focus h3 {
    margin: 0 0 0.55rem;
    font-size: 0.96rem;
    font-family: var(--font-serif);
    color: #111827;
  }

  .site-header--mega-demo .submenu--mega__col a,
  .site-header--mega-demo .submenu--mega__focus a {
    display: block;
    padding: 0.3rem 0;
    font-size: 0.91rem;
    line-height: 1.35;
    color: #374151;
    text-decoration: none;
  }

  .site-header--mega-demo .submenu--mega__col a:hover,
  .site-header--mega-demo .submenu--mega__col a:focus-visible,
  .site-header--mega-demo .submenu--mega__focus a:hover,
  .site-header--mega-demo .submenu--mega__focus a:focus-visible {
    color: #111827;
    text-decoration: underline;
  }

  .site-header--mega-demo .submenu--mega__focus {
    background: #f8fafc;
  }

  .site-header--mega-demo .submenu--mega__kicker {
    margin: 0 0 0.35rem;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 700;
  }

  .site-header--mega-demo .submenu--mega__focus p {
    margin: 0 0 0.5rem;
    font-size: 0.88rem;
    color: #4b5563;
    line-height: 1.45;
  }
}

.mega-menu-lab {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
  padding: 1.1rem;
  border: 1px solid rgba(17, 24, 39, 0.16);
  border-radius: 0.9rem;
  background: #fff;
}

.mega-menu-lab__group h3 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
  color: #111827;
}

.mega-menu-lab__group ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.mega-menu-lab__group a {
  color: #374151;
  text-decoration: none;
  font-size: 0.95rem;
}

.mega-menu-lab__group a:hover,
.mega-menu-lab__group a:focus-visible {
  color: #111827;
  text-decoration: underline;
}

.mega-menu-lab__highlight {
  border-radius: 0.75rem;
  background: #f3f4f6;
  padding: 0.9rem;
}

.mega-menu-lab__highlight p {
  margin: 0.25rem 0 0;
  font-size: 0.92rem;
}

.sidebar-lab-layout {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 960px) {
  .sidebar-lab-layout {
    grid-template-columns: minmax(16rem, 20rem) minmax(0, 1fr);
    align-items: start;
  }
}

.sidebar-lab {
  border: 1px solid rgba(17, 24, 39, 0.16);
  border-radius: 0.9rem;
  background: #fff;
  padding: 0.75rem;
  position: sticky;
  top: calc(var(--header-height, 4.75rem) + 1rem);
}

.sidebar-lab__title {
  margin: 0;
  padding: 0.55rem 0.65rem;
  font-size: 0.95rem;
  color: #374151;
}

.sidebar-lab details {
  border-radius: 0.65rem;
  border: 1px solid transparent;
}

.sidebar-lab details[open] {
  border-color: rgba(17, 24, 39, 0.12);
  background: #f9fafb;
}

.sidebar-lab summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  color: #111827;
  padding: 0.65rem;
}

.sidebar-lab summary::-webkit-details-marker {
  display: none;
}

.sidebar-lab ul {
  margin: 0 0 0.55rem;
  padding: 0 0.85rem 0.1rem;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.sidebar-lab a {
  text-decoration: none;
  color: #374151;
  font-size: 0.92rem;
}

.sidebar-lab a:hover,
.sidebar-lab a:focus-visible {
  color: #111827;
  text-decoration: underline;
}

.lab-block {
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: 0.9rem;
  background: #fff;
  padding: clamp(1rem, 2vw, 1.5rem);
}