/* === Cognitex Knowledge Hub Custom Theme === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');
:root {
    /* Cognitex theme colors */
    --color-primary: #2563EB;
    --color-primary-light: #3B82F6;
    --color-primary-dark: #1D4ED8;
    --color-accent: #FF6B00;
    --color-bg: #FCFDFF;
    --color-surface: #FFFFFF;
    --color-text: #1E293B;
    --color-muted: #64748B;
    --radius-lg: 1rem;
    --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.25s ease;
  }
  
  /* ------------------------------
     Global
  ------------------------------ */
  body {
    font-family: 'Inter', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    margin: 0;
    padding: 0;
  }
  
  a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
  }
  
  a:hover {
    color: var(--color-primary-dark);
  }
  
  /* ------------------------------
     Hero Section
  ------------------------------ */
  .hero {
    text-align: center;
    padding: 6rem 1.5rem;
    background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 100%);
    animation: fadeIn 1s ease-in-out;
  }
  
  .hero .title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text);
  }
  
  .hero .highlight {
    color: var(--color-primary);
  }
  
  .hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-muted);
    margin: 1rem auto 2.5rem;
    max-width: 700px;
  }
  
  .hero-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .btn {
    display: inline-block;
    padding: 0.9rem 1.8rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
  }
  
  .btn.primary {
    background: var(--color-primary);
    color: white;
  }
  
  .btn.primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
  }
  
  .btn.secondary {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background: transparent;
  }
  
  .btn.secondary:hover {
    background: rgba(37, 99, 235, 0.1);
  }
  
  /* ------------------------------
     Cards Section
  ------------------------------ */
  .cards {
    background: #F8FAFC;
    padding: 5rem 1.5rem;
  }
  
  .grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 1100px;
    margin: 0 auto;
  }
  
  .card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }
  
  .card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
  }
  
  .card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
  }
  
  .card p {
    color: var(--color-muted);
    margin: 1rem 0 1.5rem;
  }
  
  .btn-link {
    font-weight: 600;
    color: var(--color-primary);
  }
  
  .btn-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
  }
  
  /* ------------------------------
     Footer
  ------------------------------ */
  .site-footer {
    text-align: center;
    background: #F1F5F9;
    color: #475569;
    font-size: 0.875rem;
    padding: 2rem;
  }
  
  .site-footer a {
    color: var(--color-primary);
  }
  
  /* ------------------------------
     Animations
  ------------------------------ */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .md-nav--primary > .md-nav__list > .md-nav__item--section.md-nav__item--active > nav.md-nav[data-md-level="1"] > ul.md-nav__list > li.md-nav__item:not(.md-nav__item--active) {
    display: none;
  }