body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-color: white;
    color: hsl(222.2 84% 4.9%);
  }
  .container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 2rem 1rem;
  }
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
  }
  h1 {
    font-size: 1.875rem;
    font-weight: bold;
  }
  h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
  }
  p {
    color: hsl(215.4 16.3% 46.9%);
    line-height: 1.9;
  }
  ul {
    padding-left: 1.5rem;
    margin-top: 0.5rem;
    color: hsl(215.4 16.3% 46.9%);
  }
  li {
    margin-bottom: 0.25rem;
    color: hsl(215.4 16.3% 46.9%);
    line-height: 1.9;
  }
  .section {
    margin-bottom: 2rem;
  }
  .button {
    padding: 0.5rem 1rem;
    background-color: transparent;
    border: 1px solid hsl(214.3 31.8% 91.4%);
    border-radius: 0.375rem;
    color: hsl(222.2 84% 4.9%);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color 0.2s;
  }
  .button:hover {
    background-color: hsl(210 40% 96.1%);
  }
  .footer {
    border-top: 1px solid hsl(214.3 31.8% 91.4%);
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
    color: hsl(215.4 16.3% 46.9%);
  }

  .sound-patterns-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
    margin: 1rem 0;
  }
  
  @media (min-width: 768px) {
    .sound-patterns-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
    }
  }
  
  .sound-patterns-grid li {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.2s ease;
  }
  
  .sound-patterns-grid li:hover {
    background: rgba(253, 205, 3, 0.1);
    border-color: rgba(253, 205, 3, 0.3);
    transform: translateY(-1px);
  }