@layer pages {
  /* ===== Ornament ===== */
  .ornament {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-primary-300);
    font-size: var(--text-xs);
    letter-spacing: 0.3em;
  }

  .ornament::before,
  .ornament::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to var(--ornament-dir, right), transparent, var(--color-primary-400));
  }

  .ornament::after { --ornament-dir: left; }

  /* ===== Hero ===== */
  .neuro-hero {
    padding-block: var(--space-8) var(--space-7);
    position: relative;
    overflow: hidden;
    background: var(--color-background);
  }

  .neuro-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
      ellipse 60% 80% at 70% 50%,
      color-mix(in srgb, var(--color-primary-300) 8%, transparent),
      transparent 70%
    );
    pointer-events: none;
  }

  .neuro-hero-inner {
    position: relative;
    z-index: 1;
    max-width: var(--content-width);
  }

  .neuro-hero-eyebrow {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-primary-300);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
  }

  .neuro-hero-eyebrow::before {
    content: '\2726';
    font-size: 0.65em;
    color: var(--color-primary-300);
  }

  .neuro-hero-title {
    font-family: var(--font-heading);
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-foreground);
    letter-spacing: -0.01em;
    margin-bottom: var(--space-5);
  }

  .neuro-hero-rule {
    width: 4rem;
    height: 2px;
    background: linear-gradient(to right, var(--color-primary-300), var(--color-primary-500));
    border: none;
    margin-block: var(--space-5);
  }

  .neuro-hero-body {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--color-muted-foreground);
    max-width: 58ch;
  }

  .neuro-hero-body p + p { margin-top: var(--space-4); }

  .neuro-hero-decoration {
    position: absolute;
    top: 0;
    right: -2%;
    width: 42%;
    max-width: 520px;
    height: 100%;
    pointer-events: none;
    opacity: 0.07;
  }

  /* ===== Section Ornament ===== */
  .section-ornament {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-primary-300);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  .section-ornament::before {
    content: '\25C6';
    font-size: 0.6em;
    color: var(--color-primary-300);
  }

  /* ===== Lab Section ===== */
  .lab-section {
    padding-block: var(--space-7);
    background: var(--color-neutral-950);
    position: relative;
    overflow: hidden;
  }

  .lab-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse 80% 60% at 15% 40%, color-mix(in srgb, var(--color-primary-900) 30%, transparent), transparent 60%),
      radial-gradient(ellipse 50% 70% at 85% 70%, color-mix(in srgb, var(--color-gold-900) 25%, transparent), transparent 60%);
    pointer-events: none;
  }

  .lab-section > .container { position: relative; z-index: 1; }
  .lab-section .section-title { color: var(--color-foreground); font-weight: 400; }
  .lab-section .section-description { color: var(--color-muted-foreground); }

  .lab-section-ornament-divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
  }

  .lab-section-ornament-divider span {
    color: var(--color-primary-300);
    font-size: var(--text-base);
    letter-spacing: 0.4em;
    flex-shrink: 0;
  }

  .lab-section-ornament-divider::before,
  .lab-section-ornament-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
  }

  .tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }

  @media (max-width: 1024px) {
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
  }

  @media (max-width: 600px) {
    .tools-grid { grid-template-columns: 1fr; }
  }

  /* Tool card */
  .tool-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal), border-color var(--transition-normal);
  }

  .tool-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: var(--color-primary-400);
  }

  .tool-card-preview {
    height: 200px;
    background: var(--color-neutral-950);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .tool-card:hover .tool-card-preview { border-bottom-color: var(--color-primary-400); }

  .preview-neuron, .preview-ap { width: 100%; height: 100%; }

  .tool-card-body {
    padding: var(--space-5);
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .tool-card-tag {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-primary-300);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  .tool-card-tag::before { content: '\2727'; font-size: 0.75em; }

  .tool-card-title {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-foreground);
    margin-bottom: var(--space-2);
  }

  .tool-card-subtitle {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary-300);
    margin-bottom: var(--space-3);
  }

  .tool-card-description {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-muted-foreground);
    flex: 1;
    margin-bottom: var(--space-4);
  }

  .tool-card-rule {
    width: 2rem;
    height: 1px;
    background: var(--color-border);
    border: none;
    margin-bottom: var(--space-4);
  }

  .tool-card-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary-300);
    transition: color var(--transition-fast), gap var(--transition-fast);
  }

  .tool-card-cta::after {
    content: '\2192';
    display: inline-block;
    transition: transform var(--transition-fast);
  }

  .tool-card:hover .tool-card-cta { color: var(--color-primary-200); gap: var(--space-3); }
  .tool-card:hover .tool-card-cta::after { transform: translateX(4px); }

  /* ===== Essays Section ===== */
  .essays-section { padding-block: var(--space-7); background: var(--color-background); }

  .essays-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: var(--content-width);
  }

  .essay-entry {
    display: block;
    text-decoration: none;
    color: inherit;
    padding-block: var(--space-5);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-fast);
  }

  .essay-entry:first-child { border-top: 1px solid var(--color-border); }
  .essay-entry:hover { transform: translateX(6px); }
  .essay-entry:hover .essay-title { color: var(--color-primary-300); }

  .essay-meta {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted-foreground);
    margin-bottom: var(--space-2);
  }

  .essay-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-foreground);
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
  }

  .essay-description {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-muted-foreground);
  }

  .essay-link-hint {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-primary-300);
    margin-top: var(--space-2);
  }

  .essay-link-hint::after { content: '\2197'; font-size: 0.9em; }

  /* ===== Closing Thread ===== */
  .closing-thread {
    padding-block: var(--space-7);
    background: var(--color-background);
    position: relative;
  }

  .closing-thread-inner {
    max-width: 56ch;
    margin-inline: auto;
    text-align: center;
  }

  .closing-thread-ornament {
    font-size: var(--text-base);
    color: var(--color-primary-300);
    letter-spacing: 0.5em;
    margin-bottom: var(--space-5);
    display: block;
  }

  .closing-thread p {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-muted-foreground);
    font-style: italic;
  }
}