/* --- FEDJET SCOPED STYLES & VARIABLES --- */
  :root {
    --fedjet-primary: #F1302B;
    --fedjet-primary-hover: #D0221E;
    --fedjet-dark: #1A1D20;
    --fedjet-slate: #2B303A;
    --fedjet-light: #F8F9FA;
    --fedjet-border: #E2E8F0;
    --fedjet-text: #333333;
    --fedjet-muted: #6C757D;
    --fedjet-radius: 8px;
    --fedjet-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  }

  .fj-wrapper * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  }

  .fj-wrapper {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 20px 15px;
    color: var(--fedjet-text);
    background-color: #ffffff;
    line-height: 1.6;
  }

  /* Article Header & EEAT Card */
  .fj-header {
    text-align: left;
    margin-bottom: 25px;
  }

  .fj-badge {
    display: inline-block;
    background-color: rgba(241, 48, 43, 0.1);
    color: var(--fedjet-primary);
    font-weight: 700;
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .fj-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--fedjet-dark);
    line-height: 1.25;
    margin-bottom: 15px;
  }

  .fj-eeat-card {
    background-color: var(--fedjet-light);
    border-left: 4px solid var(--fedjet-primary);
    border-radius: 0 var(--fedjet-radius) var(--fedjet-radius) 0;
    padding: 16px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    font-size: 13.5px;
  }

  .fj-eeat-item {
    flex: 1 1 200px;
  }

  .fj-eeat-item strong {
    color: var(--fedjet-dark);
    display: block;
    margin-bottom: 2px;
  }

  /* Section Headings */
  .fj-section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--fedjet-dark);
    margin: 35px 0 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .fj-section-title::before {
    content: "";
    display: inline-block;
    width: 5px;
    height: 22px;
    background-color: var(--fedjet-primary);
    border-radius: 2px;
  }

  /* Interactive Tabs for Mechanisms */
  .fj-tabs-container {
    background: #ffffff;
    border: 1px solid var(--fedjet-border);
    border-radius: var(--fedjet-radius);
    box-shadow: var(--fedjet-shadow);
    overflow: hidden;
    margin-bottom: 30px;
  }

  .fj-tabs-header {
    display: flex;
    background: var(--fedjet-light);
    border-bottom: 1px solid var(--fedjet-border);
  }

  .fj-tab-btn {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    border: none;
    font-size: 16px;
    font-weight: 700;
    color: var(--fedjet-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
  }

  .fj-tab-btn.active {
    color: var(--fedjet-primary);
    background: #ffffff;
    border-bottom: 3px solid var(--fedjet-primary);
  }

  .fj-tab-content {
    display: none;
    padding: 25px;
  }

  .fj-tab-content.active {
    display: block;
  }

  .fj-tab-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    align-items: center;
  }

  .fj-img-placeholder {
    width: 100%;
    height: auto;
    max-height: 280px;
    object-fit: cover;
    border-radius: var(--fedjet-radius);
    border: 1px solid var(--fedjet-border);
  }

  /* Parameter Comparison Table */
  .fj-table-responsive {
    width: 100%;
    overflow-x: auto;
    margin-bottom: 30px;
    border: 1px solid var(--fedjet-border);
    border-radius: var(--fedjet-radius);
  }

  .fj-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
    min-width: 600px;
  }

  .fj-table th {
    background-color: var(--fedjet-dark);
    color: #ffffff;
    padding: 14px 16px;
    font-weight: 600;
  }

  .fj-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--fedjet-border);
  }

  .fj-table tr:nth-child(even) {
    background-color: var(--fedjet-light);
  }

  .fj-highlight-red {
    color: var(--fedjet-primary);
    font-weight: 700;
  }

  /* Material Filter Section */
  .fj-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
  }

  .fj-filter-btn {
    padding: 8px 16px;
    background-color: var(--fedjet-light);
    border: 1px solid var(--fedjet-border);
    border-radius: 20px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--fedjet-slate);
    cursor: pointer;
    transition: all 0.2s ease;
  }

  .fj-filter-btn.active, .fj-filter-btn:hover {
    background-color: var(--fedjet-primary);
    color: #ffffff;
    border-color: var(--fedjet-primary);
  }

  .fj-material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
  }

  .fj-mat-card {
    border: 1px solid var(--fedjet-border);
    border-radius: var(--fedjet-radius);
    padding: 16px;
    background: #ffffff;
    transition: transform 0.2s, box-shadow 0.2s;
  }

  .fj-mat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--fedjet-shadow);
  }

  .fj-mat-type {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--fedjet-primary);
    letter-spacing: 0.5px;
  }

  .fj-mat-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--fedjet-dark);
    margin: 4px 0 8px 0;
  }

  .fj-mat-badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 4px;
    margin-bottom: 8px;
  }

  .fj-badge-pure {
    background-color: #E0F2FE;
    color: #0369A1;
  }

  .fj-badge-abrasive {
    background-color: #FEF3C7;
    color: #B45309;
  }

  /* Interactive OPEX Calculator */
  .fj-calc-box {
    background: linear-gradient(135deg, #1A1D20 0%, #2B303A 100%);
    color: #ffffff;
    border-radius: var(--fedjet-radius);
    padding: 30px 25px;
    margin-bottom: 35px;
    box-shadow: var(--fedjet-shadow);
  }

  .fj-calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
  }

  .fj-calc-control {
    margin-bottom: 18px;
  }

  .fj-calc-control label {
    display: block;
    font-size: 13.5px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #E2E8F0;
  }

  .fj-calc-slider {
    width: 100%;
    accent-color: var(--fedjet-primary);
  }

  .fj-calc-result-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--fedjet-radius);
    padding: 20px;
    text-align: center;
  }

  .fj-cost-val {
    font-size: 32px;
    font-weight: 800;
    color: var(--fedjet-primary);
    margin: 5px 0;
  }

  /* Interactive Wizard */
  .fj-wizard-box {
    border: 2px dashed var(--fedjet-primary);
    background-color: rgba(241, 48, 43, 0.02);
    border-radius: var(--fedjet-radius);
    padding: 25px;
    text-align: center;
    margin-bottom: 35px;
  }

  .fj-wizard-options {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 15px;
  }

  .fj-wiz-btn {
    padding: 12px 24px;
    background-color: var(--fedjet-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--fedjet-radius);
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
  }

  .fj-wiz-btn:hover {
    background-color: var(--fedjet-primary-hover);
  }

  .fj-wiz-result {
    display: none;
    margin-top: 20px;
    padding: 15px;
    background: #ffffff;
    border-radius: var(--fedjet-radius);
    border: 1px solid var(--fedjet-border);
    text-align: left;
  }

  /* CTA Button */
  .fj-cta-container {
    text-align: center;
    padding: 30px;
    background-color: var(--fedjet-light);
    border-radius: var(--fedjet-radius);
  }

  .fj-btn-main {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--fedjet-primary);
    color: #ffffff !important;
    text-decoration: none;
    font-weight: 800;
    border-radius: 30px;
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(241, 48, 43, 0.3);
    transition: all 0.3s;
  }

  .fj-btn-main:hover {
    background-color: var(--fedjet-primary-hover);
    transform: translateY(-2px);
  }

  /* --- MOBILE RESPONSIVE MEDIA QUERIES --- */
  @media (max-width: 768px) {
    .fj-title {
      font-size: 24px;
    }

    .fj-tab-grid, .fj-calc-grid {
      grid-template-columns: 1fr;
    }

    .fj-tabs-header {
      flex-direction: column;
    }

    .fj-tab-btn {
      padding: 12px;
      font-size: 14px;
    }

    .fj-eeat-card {
      flex-direction: column;
      gap: 10px;
    }

    .fj-wizard-options {
      flex-direction: column;
    }

    .fj-wiz-btn {
      width: 100%;
    }
  }