/* :root {
    --primary: #00B894;
    --primary-dark: #009E7F;
    --bg-light: #f4f6f9;
    --card-bg: #ffffff;
    --border: #e5e7eb;
    --text-dark: #1f2937;
    --text-light: #6b7280;
  }

  body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
  } */

  .container {
    max-width: 1200px;
    margin: auto;
    padding: 40px 16px;
  }

  h1 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--text-dark);
  }

  .subtitle {
    text-align: center;
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 40px;
  }

  .kb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 24px;
  }

  .kb-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
  }

  .kb-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--text-dark);
  }

  iframe {
    width: 100%;
    height: 220px;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 14px;
  }

  .covered {
    background: #f9fafb;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px;
    font-size: 14px;
  }

  .covered strong {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.4px;
  }

  .covered ul {
    margin: 0;
    padding-left: 18px;
    color: #374151;
  }