body {
      margin: 0;
      padding: 4rem;
      font-family: Arial, sans-serif;
      background: #f9f9f9;
      color: #333;
    }
    header {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 2rem;
    }
    h1 {
      text-align: center;
    }
    #ctLogo {
      height: 30px;
    }
    .back-link {
      margin: 1rem 0;
    }
    #bitsLogo {
      height: 30px;
      margin-left: auto;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 1rem;
      margin-bottom: 2rem;
      margin-top: 1rem;
    }
    .metric {
      background: #fff;
      padding: 1rem;
      border-radius: 4px;
      border: 1px solid #ddd;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    .metric .value {
      font-size: 1.5rem;
      font-weight: bold;
    }
    .metric .change {
      margin-top: 0.25em;
      font-size: 0.9rem;
      color: #555;
    }
    .severity-section {
      margin-top: 2rem;
    }
    .bg-red-lines {
      position: relative;
      background-color: #fff0f0;
      border-top: 20px solid #aa0000; /* red bar */
      padding: 0.5rem;
      border-radius: 4px;
      color: #000;
    }
    .bg-green-dots {
      position: relative;
      background-color: #f0fff0;
      border-top: 20px solid #00aa00; /* green bar */
      padding: 0.5rem;
      border-radius: 4px;
      color: #000;
    }
    .bg-yellow-lines {
      position: relative;
      background-color: #fffce5;
      border-top: 20px solid #b38f00; /* yellow bar */
      padding: 0.5rem;
      border-radius: 4px;
      color: #000;
    }
    .severity-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      gap: 1rem;
    }
    .severity-card {
      background: #fff;
      padding: 1rem;
      border-radius: 4px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    .severity-card h3 {
      margin: 0 0 0.5rem;
      font-size: 1.1rem;
    }
    .severity-card .value {
      font-size: 1.4rem;
      font-weight: bold;
    }
    .severity-card .change {
      margin-top: 0.25em;
      font-size: 0.9rem;
      color: #555;
    }
    .common-issues {
      margin-top: 2rem;
    }
    .common-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
    }
    .issue-card {
      background: #fff;
      padding: 1rem;
      border-radius: 4px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    .issue-card h3 {
      margin-top: 0;
      font-size: 1rem;
    }
    .issue-card a {
      color: #0066cc;
      text-decoration: none;
    }
    .issue-card a:hover {
      text-decoration: underline;
    }
    /* Trend line chart */
    .trend-chart {
      background: #fcf9f9; padding: 1rem;
      border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      border: 2px solid #ddd;
      margin-bottom: 2rem;
      outline: 2px solid #ddd;
      outline-offset: -8px;
    }
    button#trend-toggle {
      background: #00214D;
      border: none;
      color: #ffffff;
      font-size: 1rem;
      cursor: pointer;
      padding: 1rem;
      border-radius: 8px;
    }
    button#trend-toggle:focus {
      background: #ffffff;
      color: #00214D;
      outline: 2px solid #00214D;
    }
    button#severity-toggle {
      background: #00214D;
      border: none;
      color: #ffffff;
      font-size: 1rem;
      cursor: pointer;
      padding: 1rem;
      border-radius: 8px;
    }
    button#severity-toggle:focus {
      background: #ffffff;
      color: #00214D;
      outline: 2px solid #00214D;
    }
    .delta-chart {
      background: #fff; 
      padding: 1rem;
      padding-bottom: 2rem;
      border-radius: 4px; 
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      margin: 2rem 0;
      position: relative;
      /* height: 300px; */
    } 
    .trend-chart h2, .delta-chart h2 {
      display: block;
      font-size: 1.5em;
      margin-block-start: 0.83em;
      margin-block-end: 0.83em;
      margin-inline-start: 0px;
      margin-inline-end: 0px;
      font-weight: bold;
      unicode-bidi: isolate;
    }
    .trend-chart canvas {
      width: 100% !important; 
      height: 100% !important;
      display: block;
      outline: none !important;
      border: none !important;
    }
    .delta-chart canvas {
      width: 100% !important; 
      height: 100% !important;
      display: block;
      outline: none !important;
      border: none !important;
    }
    
    /* Prevent focus and hover issues on charts */
    .chart-wrapper {
      position: relative;
      overflow: hidden;
    }
    
    .chart-wrapper canvas {
      outline: none !important;
      border: none !important;
    }
    
    .chart-wrapper canvas:focus {
      outline: none !important;
      box-shadow: none !important;
    }
    
    .chart-wrapper canvas:hover {
      outline: none !important;
      box-shadow: none !important;
    }
    .common-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 1rem;
      margin-bottom: 2rem;
    }
    .issue-card {
      background: #fff;
      border: 1px solid #ddd;
      padding: 1rem;
      border-radius: 4px;
    }
    .responsive-header {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1rem;
        }

    .responsive-header img {
      max-width: 100%;
      height: auto;
    }

    .responsive-title {
      flex: 1 1 100%;
      text-align: center;
      font-size: 2rem;
      margin: 0.5rem 0;
      word-break: break-word;
    }
    /* Key Stats Section */
    .key-stats {
      border: 2px solid #ddd;
      outline: 2px solid #ddd;
      outline-offset: -4px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      padding: 1rem;
      border-radius: 6px;
      background: #f8f8f8;
      margin-bottom: 2rem;
    }

    /* Visually hidden utility class */
    .visually-hidden {
      position: absolute !important;
      width: 1px !important;
      height: 1px !important;
      padding: 0 !important;
      margin: -1px !important;
      overflow: hidden !important;
      clip: rect(0, 0, 0, 0) !important;
      white-space: nowrap !important;
      border: 0 !important;
    }