.app-three-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    max-width: 1200px;
    margin: 25px auto 0 auto;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  }
  .app-col-card {
    flex: 1 1 280px;
    background: #FFFFFF;
    border: 1px solid #EAEAEA;
    border-top: 3px solid #6b231a;
    border-radius: 8px;
    padding: 22px 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    box-sizing: border-box;
    text-align: left;
  }
  .app-col-title {
    font-size: 16px;
    font-weight: bold;
    color: #6b231a;
    margin: 0 0 10px 0;
    line-height: 1.3;
  }
  .app-col-desc {
    font-size: 13px;
    color: #4a3e35;
    line-height: 1.65;
    margin: 0;
  }

  @media (max-width: 768px) {
    .app-three-columns {
      margin-top: 20px;
      gap: 15px;
    }
    .app-col-card {
      flex: 1 1 100%;
      padding: 18px 16px;
    }
    .app-col-title {
      font-size: 15px;
    }
    .app-col-desc {
      font-size: 12.5px;
    }
  }