   transition: background 0.2s ease;
    }

    .controls button:hover {
      opacity: 0.8;
    }

    /* Chart and Info Sections */
    #chart {
      width: 100%;
      height: 600px;
      margin: 0 auto;
      max-width: 1200px;
    }

    .benchmark-info {
      text-align: center;
      margin-bottom: 20px;
      font-style: italic;
      color: #555;
    }

    .benchmark-info a {
      color: #666;
      text-decoration: underline;
      transition: color 0.2s ease;
    }

    .benchmark-info a:hov