/* tiny helper styles local to issue graph page */
  .color-key {
    background: #f8f9fa;
    border: 1px solid #d9d9d9;
    border-radius: 6px;
    padding: 1rem 1rem 0.5rem;
    margin: 1rem 0 1.5rem;
    font-size: 0.95rem;
    line-height: 1.4;
  }
  .color-key ul {
    list-style: none;
    padding-left: 0;
    margin: 0 0 0.75rem 0;
  }
  .color-key li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.5rem;
  }
  .color-key .key-swatch {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.15);
    margin-right: 0.5rem;
    flex-shrink: 0;
    margin-top: 0.25rem;
  }
  .small-print {
    font-size: 0.8rem;
    color: #555;
    margin: 0 0 0.5rem 0;
  }
  .method-note {
    font-size: 0.9rem;
    color: #555;
    margin-top: 1rem;
  }

  /* On very small screens, let the graph compress vertically */
  @media (max-width: 600px) {
    #graph-container {
      min-height: 400px;
    }
  }