:root {
    color-scheme: light;
    --bg: #fcfdff;
    --bg-card: #ffffff;
    --bg-card-soft: #fff9f6;
    --bg-accent: linear-gradient(135deg, #cd785c, #e89b81);
    --text: #2d1f1a;
    --text-muted: #7a635a;
    --border: rgba(205, 120, 92, 0.08);
    --accent: #cd785c;
    --accent-soft: rgba(205, 120, 92, 0.12);
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    background: radial-gradient(circle at 15% 10%, rgba(205, 120, 92, 0.12), transparent 55%),
      radial-gradient(circle at 80% 0, rgba(232, 155, 129, 0.08), transparent 60%),
      var(--bg);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
  }
  
  .hero {
    padding: 2.5rem clamp(1.5rem, 6vw, 6rem) 4rem;
    background: radial-gradient(circle at 20% 20%, rgba(205, 120, 92, 0.18), rgba(255, 255, 255, 0)),
      radial-gradient(circle at 80% 0, rgba(232, 155, 129, 0.14), rgba(255, 255, 255, 0)),
      #ffffff;
  }
  
  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5rem;
  }
  
  .logo {
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.1em;
  }
  
  .nav-links {
    display: flex;
    gap: 1.5rem;
  }
  
  .nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
  }
  
  .hero-content {
    max-width: 900px;
  }
  
  .eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1rem;
  }
  
  .hero h1 {
    font-size: clamp(2.8rem, 6vw, 4.8rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
  }
  
  .hero-actions {
    display: flex;
    gap: 1rem;
  }
  
  .btn {
    padding: 0.9rem 1.8rem;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
    text-decoration: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  
  .btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
  }
  
  .btn.primary {
    background: var(--bg-accent);
    color: white;
  }
  
  .btn.ghost {
    border-color: rgba(205, 120, 92, 0.2);
    color: var(--text);
    background: #ffffff;
  }
  
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
  }
  
  .stat-card {
    padding: 1.5rem;
    border: 1px solid rgba(205, 120, 92, 0.12);
    border-radius: 1.2rem;
    background: #ffffff;
    box-shadow: 0 18px 40px rgba(45, 31, 26, 0.05);
  }
  
  .stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
  }
  
  .section {
    padding: 4rem clamp(1.5rem, 6vw, 6rem);
  }
  
  .section-header {
    max-width: 1000px;
    margin-bottom: 2.5rem;
  }
  
  .section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
  }
  
  .section p {
    color: var(--text-muted);
  }
  
  .research-grid,
  .resource-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
  
  .card {
    border-radius: 1.4rem;
    padding: 1.8rem;
    border: 1px solid rgba(205, 120, 92, 0.08);
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    box-shadow: 0 25px 60px rgba(45, 31, 26, 0.08);
  }
  
  .card[data-link] {
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease;
  }
  
  .card[data-link]:hover,
  .card[data-link]:focus-visible {
    border-color: var(--accent);
    transform: translateY(-4px);
    outline: none;
  }
  
  .card a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
  }
  
  .card-image {
    width: 100%;
    height: auto;
    border-radius: 0.8rem;
    margin-bottom: 0.5rem;
    object-fit: cover;
    max-height: 200px;
  }
  
  .highlights {
    background: #ffffff;
  }
  
  .timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .milestone {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.8rem;
    border-radius: 1.4rem;
    border: 1px solid rgba(205, 120, 92, 0.12);
    background: #ffffff;
    flex-wrap: wrap;
    box-shadow: 0 18px 40px rgba(45, 31, 26, 0.06);
  }
  
  .milestone-year {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.3rem;
  }
  
  .milestone a {
    color: var(--text);
    font-weight: 600;
  }
  
  .milestone-links {
    display: flex;
    gap: 1rem;
  }
  
  .vision {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    background: #ffffff;
    border-top: 1px solid rgba(205, 120, 92, 0.1);
    border-bottom: 1px solid rgba(205, 120, 92, 0.1);
    box-shadow: inset 0 30px 60px rgba(205, 120, 92, 0.04);
  }
  
  .vision-points {
    display: grid;
    gap: 1.5rem;
  }
  
  .vision-points div {
    padding: 1.2rem 1.5rem;
    border-radius: 1.2rem;
    border: 1px solid rgba(205, 120, 92, 0.12);
    background: #ffffff;
  }
  
  .footer {
    padding: 3rem clamp(1.5rem, 6vw, 6rem);
    border-top: 1px solid rgba(205, 120, 92, 0.12);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: #ffffff;
    box-shadow: 0 -20px 60px rgba(45, 31, 26, 0.04);
  }
  
  .footer-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }
  
  .footer-note {
    color: var(--text-muted);
    font-size: 0.9rem;
  }

  /* Cognitive Hierarchy Section */
  /* Cognitive Hierarchy Section */
  .hierarchy-grid {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 0.5rem;
    margin-top: 2rem;
  }

  .hierarchy-step {
    flex: 1;
    padding: 1.2rem 0.8rem;
    border-radius: 1rem;
    background: var(--bg-card-soft);
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  .hierarchy-step:hover {
    transform: translateY(-5px);
    background: white;
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(205, 120, 92, 0.1);
  }

  .hierarchy-step .level {
    font-weight: 700;
    color: var(--accent);
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .hierarchy-step h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--text);
    line-height: 1.2;
    white-space: nowrap;
  }

  .hierarchy-step p {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    min-height: 3em;
  }

  .hierarchy-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
    opacity: 0.3;
    padding: 0 0.1rem;
  }

  @media (max-width: 1200px) {
    .hierarchy-grid {
      gap: 0.3rem;
    }
    .hierarchy-step {
      padding: 1rem 0.5rem;
    }
    .hierarchy-step h3 {
      font-size: 0.85rem;
    }
  }

  @media (max-width: 1024px) {
    .hierarchy-grid {
      flex-wrap: wrap;
      justify-content: center;
    }
    .hierarchy-step {
      flex: none;
      width: calc(33.33% - 1rem);
      margin-bottom: 1rem;
    }
    .hierarchy-step h3 {
      white-space: normal;
      font-size: 0.95rem;
    }
    .hierarchy-arrow {
      display: none;
    }
  }

  @media (max-width: 768px) {
    .hierarchy-step {
      width: calc(50% - 1rem);
    }
  }

  @media (max-width: 480px) {
    .hierarchy-step {
      width: 100%;
    }
  }

  .status-badge {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.5rem;
  }

  .vision-card {
    border-style: dashed;
    background: linear-gradient(to bottom right, #ffffff, #fff9f6);
  }

  @media (max-width: 768px) {
    .hierarchy-grid {
      grid-template-columns: 1fr;
    }
    .hierarchy-arrow {
      transform: rotate(90deg);
      margin: 0.5rem 0;
    }
  }
  
  @media (max-width: 768px) {
    .nav {
      flex-direction: column;
      gap: 1.2rem;
    }
  
    .hero-actions {
      flex-direction: column;
    }
  
    .milestone {
      flex-direction: column;
    }
  }