/* ========================================
   PRODUCT BUILDER — ported from High-Performance O-Rings template
   Loaded only on Product Page template + solution/application singular.
======================================== */
  :root {
    --ismat-navy:        #003087;
    --ismat-dark:        #002370;
    --ismat-mid:         #001a55;
    --ismat-accent:      #CFAB51;
    --ismat-accent-light:#DFBD6A;
    --ismat-gold:        #CFAB51;
    --ismat-teal:        #1D9E75;
    --ismat-blue:        #003087;
    --ismat-light-bg:    #F2F5FA;
    --ismat-border:      rgba(0,48,135,0.10);
    --ismat-border-strong: rgba(0,48,135,0.18);
    --white:             #FFFFFF;
    --text-dark:         #001a4d;
    --text-mid:          #2C3E50;
    --text-muted:        #5A6878;
    --text-light:        #8A97A6;
    --font-display: 'Barlow', sans-serif;
    --font-body:    'Barlow', sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 4px rgba(0,48,135,0.06), 0 0 0 1px rgba(0,48,135,0.04);
    --shadow-md: 0 4px 16px rgba(0,48,135,0.08), 0 0 0 1px rgba(0,48,135,0.05);
    --shadow-lg: 0 12px 40px rgba(0,48,135,0.12), 0 0 0 1px rgba(0,48,135,0.06);
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    font-family: var(--font-body);
    background: var(--white);
    color: var(--text-dark);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  /* ─── HERO ─── */
  .hero {
    background: var(--ismat-navy);
    position: relative;
    overflow: hidden;
    padding: 96px 0 80px;
  }
  .hero::before {
    content: '';
    position: absolute;
    top: -120px; right: -200px;
    width: 700px; height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(207,171,81,0.14) 0%, transparent 70%);
    pointer-events: none;
  }
  .hero::after {
    content: '';
    position: absolute;
    bottom: -80px; left: -100px;
    width: 500px; height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
    pointer-events: none;
  }
  .hero-grid {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 64px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
    position: relative;
    z-index: 1;
  }
  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(207,171,81,0.15);
    border: 1px solid rgba(207,171,81,0.35);
    color: #DFBD6A;
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 500;
   
    text-transform: uppercase;
    padding: 6px 14px;
    border-radius: 40px;
    margin-bottom: 24px;
  }
  .hero-eyebrow::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--ismat-gold);
  }
  .hero h1 {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 58px);
    font-weight: 800;
    line-height: 1.08;
    color: var(--white);
    margin-bottom: 20px;
   
  }
  .hero h1 span {
    color: var(--ismat-accent);
  }
  .hero-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    line-height: 1.75;
    max-width: 540px;
    margin-bottom: 36px;
    font-weight: 300;
  }
  .hero-cta-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--ismat-gold);
    color: #001a4d;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background 0.2s, transform 0.15s;
    border: none;
    cursor: pointer;
  }
  .btn-primary:hover { background: #b8943d; transform: translateY(-1px); }
  .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: rgba(255,255,255,0.85);
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 400;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.2);
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    cursor: pointer;
  }
  .btn-secondary:hover { border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.05); transform: translateY(-1px); }

  .hero-stats {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(8px);
  }
  .hero-stat-label {
    font-size: 12px;
    font-weight: 500;
   
    text-transform: uppercase;
    color: rgba(255,255,255,0.45);
    margin-bottom: 24px;
  }
  .hero-stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .hero-stat {
    padding: 16px;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.07);
  }
  .hero-stat-number {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 4px;
  }
  .hero-stat-number.accent { color: var(--ismat-accent); }
  .hero-stat-number.teal { color: #3ECFA0; }
  .hero-stat-number.gold { color: var(--ismat-gold); }
  .hero-stat-desc {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    line-height: 1.4;
  }
  .hero-material-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .material-pill {
    font-size: 11px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 40px;
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.65);
   
  }

  /* ─── SECTION STRUCTURE ─── */
  .section { padding: 88px 0; }
  .section.bg-light { background: var(--ismat-light-bg); }
  .section.bg-navy { background: var(--ismat-navy); }
  .section.bg-dark { background: var(--ismat-dark); }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
  .section-label {
    font-size: 11px;
    font-weight: 500;
   
    text-transform: uppercase;
    color: var(--ismat-gold);
    margin-bottom: 12px;
    display: block;
  }
  .section-label.light { color: var(--ismat-gold); }
  .section-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 700;
    line-height: 1.15;
   
    color: var(--text-dark);
    margin-bottom: 16px;
  }
  .section-title.light { color: var(--white); }
  .section-desc {
    font-size: 17px;
    color: var(--text-muted);
    line-height: 1.75;
    max-width: 640px;
    font-weight: 300;
  }
  .section-desc.light { color: rgba(255,255,255,0.65); }
  .section-header { margin-bottom: 56px; }

  /* ─── BREADCRUMB ─── */
  .breadcrumb {
    background: var(--ismat-dark);
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255,255,255,0.45);
  }
  .breadcrumb-inner a { color: rgba(255,255,255,0.5); text-decoration: none; }
  .breadcrumb-inner a:hover { color: rgba(255,255,255,0.8); }
  .breadcrumb-sep { color: rgba(255,255,255,0.2); font-size: 11px; }
  .breadcrumb-current { color: rgba(255,255,255,0.8); }

  /* ─── MATERIAL CARDS (MAIN SECTIONS) ─── */
  .material-section {
    padding: 72px 0;
    border-bottom: 1px solid var(--ismat-border);
  }
  .material-section:last-child { border-bottom: none; }
  .material-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 64px;
    align-items: start;
  }
  .material-layout.reverse {
    grid-template-columns: 1fr 380px;
  }
  .material-layout.reverse .material-sidebar { order: 2; }
  .material-layout.reverse .material-content { order: 1; }

  .material-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 500;
   
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 40px;
    margin-bottom: 16px;
  }
  .tag-ffkm { background: rgba(83,74,183,0.10); color: #534AB7; border: 1px solid rgba(83,74,183,0.2); }
  .tag-hnbr { background: rgba(15,110,86,0.10); color: #0F6E56; border: 1px solid rgba(15,110,86,0.2); }
  .tag-fkm  { background: rgba(186,117,23,0.10); color: #854F0B; border: 1px solid rgba(186,117,23,0.2); }
  .tag-fepm { background: rgba(153,60,29,0.10); color: #993C1D; border: 1px solid rgba(153,60,29,0.2); }
  .tag-ptfe { background: rgba(0,48,135,0.10); color: #003087; border: 1px solid rgba(0,48,135,0.2); }
  .tag-elastomeric { background: rgba(94,58,90,0.10); color: #6B3A68; border: 1px solid rgba(94,58,90,0.2); }

  .material-h2 {
    font-family: var(--font-display);
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 700;
    line-height: 1.15;
   
    color: var(--text-dark);
    margin-bottom: 16px;
  }
  .material-intro {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 28px;
    font-weight: 300;
  }
  .material-body {
    font-size: 15px;
    color: var(--text-mid);
    line-height: 1.8;
    margin-bottom: 20px;
  }

  /* Spec strip */
  .spec-strip {
    display: flex;
    gap: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--ismat-border);
    margin: 28px 0;
  }
  .spec-item {
    flex: 1;
    padding: 14px 16px;
    background: var(--ismat-light-bg);
    border-right: 1px solid var(--ismat-border);
    text-align: center;
  }
  .spec-item:last-child { border-right: none; }
  .spec-value {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.2;
    margin-bottom: 4px;
  }
  .spec-label {
    font-size: 11px;
    color: var(--text-light);
    text-transform: uppercase;
   
    font-weight: 500;
  }

  /* Benefit list */
  .benefit-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
  }
  .benefit-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14.5px;
    color: var(--text-mid);
    line-height: 1.6;
  }
  .benefit-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
  }
  .dot-ffkm { background: rgba(83,74,183,0.12); }
  .dot-ffkm svg { stroke: #534AB7; }
  .dot-hnbr { background: rgba(15,110,86,0.12); }
  .dot-hnbr svg { stroke: #0F6E56; }
  .dot-fkm { background: rgba(186,117,23,0.12); }
  .dot-fkm svg { stroke: #854F0B; }
  .dot-fepm { background: rgba(153,60,29,0.12); }
  .dot-fepm svg { stroke: #993C1D; }
  .dot-ptfe { background: rgba(0,48,135,0.12); }
  .dot-ptfe svg { stroke: #003087; }
  .dot-elastomeric { background: rgba(107,58,104,0.12); }
  .dot-elastomeric svg { stroke: #6B3A68; }

  /* Application chips */
  .app-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
  }
  .app-chip {
    font-size: 12.5px;
    color: var(--text-mid);
    background: var(--white);
    border: 1px solid var(--ismat-border-strong);
    padding: 5px 13px;
    border-radius: 40px;
    font-weight: 400;
  }

  /* CTA link */
  .material-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--ismat-gold);
    font-size: 14.5px;
    font-weight: 500;
    text-decoration: none;
    padding: 10px 0;
    transition: gap 0.2s;
  }
  .material-cta:hover { gap: 12px; }
  .material-cta svg { width: 16px; height: 16px; }

  /* Sidebar card */
  .material-sidebar {
    position: sticky;
    top: 24px;
  }
  .sidebar-card {
    background: var(--white);
    border: 1px solid var(--ismat-border-strong);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
  }
  .sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--ismat-border);
  }
  .sidebar-header-label {
    font-size: 11px;
    font-weight: 500;
   
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 8px;
  }
  .sidebar-material-name {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
  }
  .sidebar-material-sub {
    font-size: 13px;
    color: var(--text-muted);
  }
  .sidebar-body { padding: 20px 24px; }
  .sidebar-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--ismat-border);
    font-size: 13.5px;
  }
  .sidebar-row:last-child { border-bottom: none; }
  .sidebar-row-label { color: var(--text-muted); }
  .sidebar-row-value { font-weight: 500; color: var(--text-dark); text-align: right; max-width: 55%; }
  .sidebar-footer {
    padding: 20px 24px;
    background: var(--ismat-light-bg);
    border-top: 1px solid var(--ismat-border);
  }
  .sidebar-brand {
    font-size: 11px;
    color: var(--text-light);
   
    text-transform: uppercase;
    margin-bottom: 6px;
  }
  .sidebar-brand-name {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
  }

  /* Accent strip for sidebar */
  .sidebar-accent-strip {
    height: 4px;
    border-radius: 0;
  }
  .strip-ffkm { background: linear-gradient(90deg, #534AB7, #7F77DD); }
  .strip-hnbr { background: linear-gradient(90deg, #0F6E56, #1D9E75); }
  .strip-fkm  { background: linear-gradient(90deg, #854F0B, #BA7517); }
  .strip-fepm { background: linear-gradient(90deg, #993C1D, #D85A30); }
  .strip-ptfe { background: linear-gradient(90deg, #003087, #CFAB51); }

  /* ─── COMPARISON TABLE ─── */
  .compare-section { padding: 88px 0; background: var(--ismat-light-bg); }
  .compare-table-wrap { overflow-x: auto; }
  .compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
  }
  .compare-table thead th {
    background: var(--ismat-navy);
    color: var(--white);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    padding: 16px 20px;
    text-align: left;
   
    border-right: 1px solid rgba(255,255,255,0.08);
  }
  .compare-table thead th:last-child { border-right: none; }
  .compare-table tbody td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--ismat-border);
    border-right: 1px solid var(--ismat-border);
    vertical-align: middle;
    color: var(--text-mid);
    line-height: 1.5;
  }
  .compare-table tbody td:last-child { border-right: none; }
  .compare-table tbody tr:last-child td { border-bottom: none; }
  .compare-table tbody tr:hover td { background: #FAFBFC; }
  .compare-table .col-material {
    font-weight: 600;
    color: var(--text-dark);
    font-family: var(--font-display);
    font-size: 14px;
    white-space: nowrap;
  }
  .rating-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 2px;
  }
  .rating-filled { background: var(--ismat-teal); }
  .rating-empty { background: var(--ismat-border-strong); }
  .temp-badge {
    font-size: 12px;
    font-weight: 500;
    padding: 3px 9px;
    border-radius: 4px;
    white-space: nowrap;
  }
  .temp-high { background: rgba(162,36,40,0.08); color: #A32D2D; }
  .temp-mid  { background: rgba(133,79,11,0.08); color: #854F0B; }
  .temp-std  { background: rgba(0,48,135,0.08);  color: #003087; }

  /* ─── INDUSTRIES ─── */
  .industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
  }
  .industry-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: background 0.2s, border-color 0.2s, transform 0.2s;
    text-decoration: none;
    display: block;
  }
  .industry-card:hover {
    background: rgba(255,255,255,0.10);
    border-color: rgba(207,171,81,0.35);
    transform: translateY(-3px);
  }
  .industry-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: rgba(207,171,81,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
  }
  .industry-icon svg { width: 24px; height: 24px; stroke: var(--ismat-accent-light); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
  .industry-name {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 6px;
  }
  .industry-desc {
    font-size: 12.5px;
    color: rgba(255,255,255,0.45);
    line-height: 1.5;
  }

  /* ─── BACKUP RINGS CALLOUT ─── */
  .callout-strip {
    background: var(--ismat-dark);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xl);
    padding: 40px 48px;
    display: flex;
    align-items: center;
    gap: 40px;
  }
  .callout-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    background: rgba(207,171,81,0.15);
    border: 1px solid rgba(207,171,81,0.30);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .callout-icon-wrap svg { width: 32px; height: 32px; stroke: var(--ismat-accent-light); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
  .callout-text h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
   
  }
  .callout-text p {
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    max-width: 560px;
    font-weight: 300;
  }
  .callout-link {
    margin-left: auto;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--ismat-accent);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.2s;
  }
  .callout-link:hover { background: #002370; }

  /* ─── BLOG CARDS ─── */
  .blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
  }
  .blog-card {
    background: var(--white);
    border: 1px solid var(--ismat-border-strong);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    display: block;
    transition: box-shadow 0.2s, transform 0.2s;
    box-shadow: var(--shadow-sm);
  }
  .blog-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
  }
  .blog-card-thumb {
    height: 180px;
    background: var(--ismat-light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--ismat-border);
    position: relative;
    overflow: hidden;
  }
  .blog-thumb-label {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-light);
   
    text-align: center;
    padding: 20px;
    line-height: 1.3;
  }
  .blog-thumb-icon {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .blog-thumb-icon svg { width: 20px; height: 20px; }
  .blog-card-body { padding: 24px; }
  .blog-category {
    font-size: 11px;
    font-weight: 500;
   
    text-transform: uppercase;
    color: var(--ismat-accent);
    margin-bottom: 10px;
  }
  .blog-title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.35;
    margin-bottom: 12px;
   
  }
  .blog-excerpt {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 20px;
    font-weight: 300;
  }
  .blog-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--ismat-accent);
  }
  .blog-read-more svg { width: 14px; height: 14px; }

  /* ─── CTA BANNER ─── */
  .cta-banner {
    background: var(--ismat-navy);
    padding: 72px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  .cta-banner::before {
    content: '';
    position: absolute;
    top: -80px; left: 50%;
    transform: translateX(-50%);
    width: 600px; height: 300px;
    background: radial-gradient(ellipse, rgba(255,255,255,0.10) 0%, transparent 70%);
    pointer-events: none;
  }
  .cta-banner h2 {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 16px;
   
    position: relative;
  }
  .cta-banner p {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    max-width: 520px;
    margin: 0 auto 36px;
    line-height: 1.6;
    font-weight: 300;
    position: relative;
  }
  .cta-banner-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; }
  .btn-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--white);
    color: var(--ismat-navy);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: transform 0.15s;
  }
  .btn-white:hover { transform: translateY(-2px); }
  .btn-outline-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--white);
    font-size: 15px;
    font-weight: 500;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    border: 1.5px solid rgba(255,255,255,0.5);
    text-decoration: none;
    transition: border-color 0.2s, transform 0.15s;
  }
  .btn-outline-white:hover { border-color: var(--white); transform: translateY(-2px); }

  /* ─── INTRO / MATERIALS OVERVIEW ─── */
  .intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }
  .material-overview-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .mat-ov-card {
    padding: 18px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--ismat-border-strong);
    background: var(--white);
    text-decoration: none;
    display: block;
    transition: box-shadow 0.2s, transform 0.2s;
  }
  .mat-ov-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
  .mat-ov-abbr {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 800;
    margin-bottom: 4px;
   
  }
  .mat-ov-name {
    font-size: 11.5px;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 10px;
  }
  .mat-ov-temp {
    font-size: 12px;
    font-weight: 500;
    padding: 3px 10px;
    border-radius: 4px;
    display: inline-block;
  }
  .ov-ffkm { color: #534AB7; }
  .ov-ffkm .mat-ov-temp { background: rgba(83,74,183,0.10); color: #534AB7; }
  .ov-hnbr { color: #0F6E56; }
  .ov-hnbr .mat-ov-temp { background: rgba(15,110,86,0.10); color: #0F6E56; }
  .ov-fkm  { color: #854F0B; }
  .ov-fkm  .mat-ov-temp { background: rgba(133,79,11,0.10); color: #854F0B; }
  .ov-fepm { color: #993C1D; }
  .ov-fepm .mat-ov-temp { background: rgba(153,60,29,0.10); color: #993C1D; }
  .ov-ptfe { color: #003087; }
  .ov-ptfe .mat-ov-temp { background: rgba(0,48,135,0.10); color: #003087; }

  /* arrow icon inline */
  .arrow-right {
    display: inline-block;
    width: 16px;
    height: 16px;
    vertical-align: middle;
  }

  /* ─── DIVIDER ─── */
  .divider { height: 1px; background: var(--ismat-border); margin: 0; }

  /* ─── HERO CONTACT FORM ─── */
  .hero-contact-card {
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: var(--radius-lg);
    padding: 28px 28px 24px;
    backdrop-filter: blur(10px);
  }
  .hero-contact-label {
    font-size: 11px;
    font-weight: 600;
   
    text-transform: uppercase;
    color: var(--ismat-accent-light);
    margin-bottom: 6px;
  }
  .hero-contact-sub {
    font-size: 13.5px;
    color: rgba(255,255,255,0.55);
    line-height: 1.55;
    margin-bottom: 20px;
    font-weight: 300;
  }
  .hero-contact-form { display: flex; flex-direction: column; gap: 14px; }
  .hcf-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .hcf-row { display: contents; }
  .hcf-field { display: flex; flex-direction: column; gap: 5px; }
  .hcf-label {
    font-size: 11px;
    font-weight: 500;
   
    text-transform: uppercase;
    color: rgba(255,255,255,0.45);
  }
  .hcf-input {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    color: var(--white);
    font-family: var(--font-body);
    font-size: 14px;
    padding: 10px 13px;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
    width: 100%;
    -webkit-appearance: none;
  }
  .hcf-input::placeholder { color: rgba(255,255,255,0.28); }
  .hcf-input:focus {
    border-color: rgba(207,171,81,0.6);
    background: rgba(255,255,255,0.12);
  }
  .hcf-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='rgba(255,255,255,0.4)' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
  }
  .hcf-select option { background: #002370; color: var(--white); }
  .hcf-textarea { resize: vertical; min-height: 72px; line-height: 1.5; }
  .hcf-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--ismat-gold);
    color: #001a4d;
    font-family: var(--font-body);
    font-size: 14.5px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    width: 100%;
    margin-top: 2px;
    min-height: 46px;
  }
  .hcf-submit:hover { background: #b8943d; transform: translateY(-1px); }


  .table-scroll-hint {
    display: none;
    text-align: center;
    font-size: 12px;
    color: var(--text-light);
   
    margin-bottom: 10px;
  }
  @media (max-width: 700px) {
    .table-scroll-hint { display: block; }
  }

  /* ─── RESPONSIVE ─── */

  /* Tablet: ≤900px */
  @media (max-width: 900px) {
    /* Layout resets */
    .hero-grid,
    .material-layout,
    .material-layout.reverse,
    .intro-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }
    .material-layout.reverse .material-sidebar,
    .material-layout.reverse .material-content { order: unset; }

    /* Sidebar: un-sticky on mobile so it doesn't overlap scroll */
    .material-sidebar { position: static; top: auto; }

    /* Container padding */
    .container { padding: 0 20px; }
    .breadcrumb-inner { padding: 0 20px; }

    /* Hero */
    .hero { padding: 56px 0 48px; }
    .hero-grid { padding: 0 20px; }
    .hero-stats { display: none; }
    /* contact card stays visible but adapts */
    .hero-contact-card { padding: 22px 20px 20px; }
    .hcf-two-col { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: clamp(30px, 8vw, 46px); }
    .hero-desc { font-size: 15px; }
    .hero-cta-row { flex-direction: column; gap: 10px; }
    .btn-primary, .btn-secondary { width: 100%; justify-content: center; padding: 15px 24px; font-size: 15px; }

    /* Sections */
    .section { padding: 64px 0; }
    .section-header { margin-bottom: 40px; }
    .material-section { padding: 56px 0; }

    /* Callout strip */
    .callout-strip { flex-direction: column; gap: 20px; padding: 28px 24px; border-radius: var(--radius-lg); }
    .callout-link { margin-left: 0; width: 100%; justify-content: center; }
    .callout-icon-wrap { width: 56px; height: 56px; }
    .callout-text h3 { font-size: 18px; }
    .callout-text p { font-size: 14px; }

    /* Industry grid */
    .industry-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .industry-card { padding: 20px 16px; }

    /* Blog grid */
    .blog-grid { grid-template-columns: 1fr; }

    /* Section header with flex row (blogs) */
    .section-header[style*="justify-content"] { flex-direction: column; align-items: flex-start !important; }

    /* CTA banner */
    .cta-banner { padding: 56px 0; }
    .cta-banner-btns { flex-direction: column; align-items: center; gap: 10px; }
    .btn-white, .btn-outline-white { width: 100%; max-width: 320px; justify-content: center; }

    /* Elastomeric grid */
    div[style*="grid-template-columns: 1fr 1fr"][style*="gap: 56px"] {
      display: block !important;
    }
    div[style*="grid-template-columns: 1fr 1fr"][style*="gap: 56px"] > div:first-child {
      margin-bottom: 32px;
    }
  }

  /* Mobile: ≤600px */
  @media (max-width: 600px) {
    /* Container */
    .container { padding: 0 16px; }
    .breadcrumb-inner { padding: 0 16px; flex-wrap: wrap; }

    /* Hero */
    .hero { padding: 44px 0 40px; }
    .hero-grid { padding: 0 16px; gap: 28px; }
    .hero-eyebrow { font-size: 11px; }
    .hero h1 { font-size: clamp(26px, 9vw, 38px); margin-bottom: 16px; }
    .hero-desc { font-size: 14.5px; margin-bottom: 28px; }

    /* Sections */
    .section { padding: 48px 0; }
    .section-title { font-size: clamp(22px, 6vw, 32px); }
    .section-desc { font-size: 15px; }
    .material-section { padding: 44px 0; }
    .section-header { margin-bottom: 32px; }

    /* Material overview cards — single column on small mobile */
    .material-overview-cards { grid-template-columns: 1fr; gap: 10px; }
    a.mat-ov-card[style*="grid-column: span 2"] { grid-column: span 1 !important; }

    /* Spec strip — 2-per-row wrapping */
    .spec-strip { flex-wrap: wrap; border-radius: var(--radius-md); }
    .spec-item { min-width: calc(50% - 1px); border-right: none; border-bottom: 1px solid var(--ismat-border); }
    .spec-item:nth-child(odd) { border-right: 1px solid var(--ismat-border); }
    .spec-item:last-child, .spec-item:nth-last-child(2):nth-child(odd) { border-bottom: none; }
    .spec-value { font-size: 16px; }

    /* Sidebar card */
    .sidebar-card { border-radius: var(--radius-md); }
    .sidebar-header { padding: 18px 18px 16px; }
    .sidebar-body { padding: 4px 18px; }
    .sidebar-footer { padding: 16px 18px; }
    .sidebar-material-name { font-size: 18px; }
    .sidebar-row { font-size: 13px; }
    .sidebar-row-value { max-width: 60%; }

    /* Benefit list */
    .benefit-list li { font-size: 14px; }

    /* App chips */
    .app-chip { font-size: 12px; padding: 5px 11px; }

    /* Industry grid — single column */
    .industry-grid { grid-template-columns: 1fr; gap: 10px; }
    .industry-card { padding: 18px 16px; text-align: left; display: flex; align-items: center; gap: 14px; }
    .industry-icon { margin: 0; flex-shrink: 0; width: 44px; height: 44px; border-radius: var(--radius-md); }
    .industry-name { font-size: 14px; margin-bottom: 3px; }
    .industry-desc { font-size: 12px; }

    /* Callout */
    .callout-strip { padding: 24px 18px; }
    .callout-text h3 { font-size: 16px; }

    /* Blog cards */
    .blog-card-thumb { height: 140px; }
    .blog-thumb-label { font-size: 16px; }
    .blog-card-body { padding: 18px; }
    .blog-title { font-size: 15.5px; }

    /* CTA banner */
    .cta-banner { padding: 44px 0; }
    .cta-banner h2 { font-size: clamp(22px, 6vw, 32px); }
    .cta-banner p { font-size: 15px; }

    /* Compare table — horizontal scroll with hint */
    .compare-table-wrap { -webkit-overflow-scrolling: touch; border-radius: var(--radius-md); }
    .compare-table { font-size: 13px; }
    .compare-table thead th { padding: 12px 14px; font-size: 12px; }
    .compare-table tbody td { padding: 12px 14px; }
    .compare-table .col-material { font-size: 13px; }
    .temp-badge { font-size: 11px; padding: 2px 7px; }

    /* Hero CTA full-width */
    .hero-cta-row .btn-primary, .hero-cta-row .btn-secondary { font-size: 14.5px; padding: 14px 20px; }

    /* Material CTA */
    .material-cta { font-size: 14px; }

    /* Contact form — stack two-col on small screens */
    .hcf-two-col { grid-template-columns: 1fr; }
    .hero-contact-card { padding: 18px 16px; }

    /* Breadcrumb */
    .breadcrumb { padding: 10px 0; }
    .breadcrumb-inner { font-size: 12px; gap: 6px; }
  }

  /* Very small: ≤380px */
  @media (max-width: 380px) {
    .hero h1 { font-size: 24px; }
    .section-title { font-size: 20px; }
    .hero-eyebrow { font-size: 10px; }
    .spec-item { min-width: 100%; border-right: none !important; }
    .spec-item:nth-last-child(2) { border-bottom: 1px solid var(--ismat-border) !important; }
  }

/* ========================================
   PRODUCT BUILDER — extra blocks
   (process steps, feature grid, why-choose stats, FAQ, single hero)
======================================== */

/* Single-column hero (form disabled) */
.hero-grid--single { grid-template-columns: 1fr; max-width: 820px; }

/* Process steps */
.pb-process .pb-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.pb-step {
  background: #fff;
  border: 1px solid #e3e6ee;
  border-radius: 12px;
  padding: 28px 24px;
  position: relative;
}
.pb-step-num {
  font-size: 38px;
  font-weight: 800;
  line-height: 1;
  color: var(--ismat-accent);
  opacity: 0.65;
  margin-bottom: 14px;
}
.pb-step-title { font-size: 17px; font-weight: 700; color: var(--ismat-navy); margin-bottom: 8px; }
.pb-step-desc { font-size: 14px; line-height: 1.65; color: var(--text-muted, #5b6473); margin: 0; }

/* Feature grid */
.pb-feature-grid {
  display: grid;
  grid-template-columns: repeat(var(--pb-cols, 3), 1fr);
  gap: 28px;
  margin-top: 48px;
}
.pb-feature {
  padding: 8px 0;
  border-top: 2px solid var(--ismat-accent);
  padding-top: 20px;
}
.pb-feature-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--ismat-accent);
  margin-bottom: 10px;
}
.pb-feature-icon { margin-bottom: 14px; }
.pb-feature-icon img { width: 44px; height: 44px; object-fit: contain; }
.pb-feature-title { font-size: 17px; font-weight: 700; color: var(--ismat-navy); margin-bottom: 8px; }
.pb-feature-text { font-size: 14px; line-height: 1.7; color: var(--text-muted, #5b6473); margin: 0; }

/* Why choose + stats */
.pb-why-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
}
.pb-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pb-stat {
  background: #fff;
  border: 1px solid #e3e6ee;
  border-radius: 12px;
  padding: 26px 22px;
  text-align: center;
}
.pb-stat-value { font-size: 34px; font-weight: 800; color: var(--ismat-navy); line-height: 1; margin-bottom: 8px; }
.pb-stat-label { font-size: 13px; font-weight: 600; text-transform: uppercase; color: var(--ismat-accent); }

/* FAQ accordion */
.pb-faq-list { max-width: 860px; margin: 40px auto 0; }
.pb-faq-item {
  border: 1px solid #e3e6ee;
  border-radius: 10px;
  margin-bottom: 14px;
  background: #fff;
  overflow: hidden;
}
.pb-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ismat-navy);
}
.pb-faq-chev { flex: 0 0 auto; transition: transform 0.25s ease; color: var(--ismat-accent); }
.pb-faq-item.open .pb-faq-chev { transform: rotate(180deg); }
.pb-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.pb-faq-item.open .pb-faq-a { max-height: 600px; }
.pb-faq-a-inner { padding: 0 24px 22px; font-size: 15px; line-height: 1.7; color: var(--text-muted, #5b6473); }

/* Responsive */
@media screen and (max-width: 980px) {
  .pb-process .pb-steps { grid-template-columns: repeat(2, 1fr); }
  .pb-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .pb-why-grid { grid-template-columns: 1fr; gap: 36px; }
}
@media screen and (max-width: 560px) {
  .pb-process .pb-steps,
  .pb-feature-grid,
  .pb-stats { grid-template-columns: 1fr; }
}

/* Spec / data table (editable columns + rows) */
.pb-spec-table th,
.pb-spec-table td { text-align: left; vertical-align: top; }
.pb-spec-table td { font-size: 13px; line-height: 1.55; }
.pb-spec-table td:first-child { min-width: 130px; }
.pb-spec-emph td:first-child { font-weight: 700; color: var(--ismat-navy); }