:root {
      --bg-color: #f8f9fa;
      --card-bg: #ffffff;
      --primary: #2e7d32;
      --primary-hover: #1b5e20;
      --text-main: #212529;
      --text-muted: #495057;
      --border-color: #dee2e6;
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --bg-color: #121212;
        --card-bg: #1e1e1e;
        --primary: #4caf50;
        --primary-hover: #81c784;
        --text-main: #f8f9fa;
        --text-muted: #ced4da;
        --border-color: #444444;
      }
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      line-height: 1.6;
      background-color: var(--bg-color);
      color: var(--text-main);
      margin: 0;
      padding: 1.5rem 1rem;
    }

    .container {
      max-width: 680px;
      margin: 0 auto;
      background-color: var(--card-bg);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
      border: 1px solid var(--border-color);
    }

    h1 {
      color: var(--primary);
      margin-top: 0;
      font-size: 1.75rem;
    }

    h2 {
      font-size: 1.25rem;
      margin-top: 1.75rem;
      border-bottom: 2px solid var(--border-color);
      padding-bottom: 0.3rem;
    }

    ol, ul {
      padding-left: 1.25rem;
    }

    li {
      margin-bottom: 0.75rem;
    }

    .about-box {
      background-color: rgba(46, 125, 50, 0.08);
      border-left: 4px solid var(--primary);
      padding: 1rem;
      margin-bottom: 1.5rem;
      border-radius: 0 8px 8px 0;
    }

    .badge-list {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin: 0.5rem 0 1rem 0;
      padding: 0;
      list-style: none;
    }

    .badge-item {
      background-color: rgba(46, 125, 50, 0.15);
      color: var(--primary);
      padding: 0.4rem 0.8rem;
      border-radius: 20px;
      font-weight: 600;
      font-size: 0.9rem;
      margin-bottom: 0;
    }

    #sector-map {
      height: 260px;
      width: 100%;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      margin-top: 1rem;
      z-index: 1;
    }

    .callout {
      background-color: rgba(0, 0, 0, 0.03);
      border-left: 4px solid var(--primary);
      padding: 0.8rem 1rem;
      margin: 1rem 0;
      border-radius: 0 4px 4px 0;
    }

    a.button-back {
      display: inline-block;
      background-color: var(--primary);
      color: #ffffff;
      text-decoration: none;
      padding: 0.6rem 1.2rem;
      border-radius: 6px;
      font-weight: 600;
      margin-top: 1.5rem;
    }

    a.button-back:hover, a.button-back:focus {
      background-color: var(--primary-hover);
    }

    a:focus-visible {
      outline: 3px solid var(--primary);
      outline-offset: 2px;
    }