/* ==========================================================================
   TECHNICAL DATA & POLYMER ENGINEERING HUB - EXTRAORDINARY BANGER UI
   Bhushan Rubber Industries - Materials Science & ASTM D2000 Decoder
   ========================================================================== */

:root {
  --tech-primary: #0066cc;
  --tech-primary-hover: #0052a3;
  --tech-teal: #00b4d8;
  --tech-cyan: #38bdf8;
  --tech-emerald: #10b981;
  --tech-amber: #f59e0b;
  --tech-rose: #f43f5e;
  --tech-navy: #0a192f;
  --tech-dark-card: #0d1e32;
  --tech-dark-bg: #07111d;
  --tech-surface: #f8fafc;
  --tech-border: #e2e8f0;
  --tech-border-focus: #00b4d8;
  --tech-text-dark: #0f172a;
  --tech-text-muted: #64748b;
  --tech-radius: 14px;
  --tech-radius-lg: 20px;
  --tech-shadow-sm: 0 2px 10px rgba(10, 25, 47, 0.05);
  --tech-shadow-md: 0 8px 30px rgba(10, 25, 47, 0.08);
  --tech-shadow-lg: 0 20px 50px rgba(0, 102, 204, 0.14);
}

/* Base Sections */
.tech-section {
  padding: 85px 0;
  position: relative;
}

.tech-section-alt {
  padding: 85px 0;
  background: var(--tech-surface);
  position: relative;
}

.tech-pill-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--tech-primary);
  margin-bottom: 12px;
}

.tech-pill-label::after {
  content: "";
  display: inline-block;
  width: 40px;
  height: 2px;
  background: var(--tech-primary);
  border-radius: 2px;
}

.tech-section-heading {
  font-size: 38px;
  font-weight: 800;
  color: var(--tech-navy);
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: -0.5px;
}

.tech-section-subtext {
  font-size: 16px;
  color: var(--tech-text-muted);
  line-height: 1.65;
  max-width: 760px;
  margin: 0 auto 50px;
  text-align: center;
}

.text-gradient-teal {
  background: linear-gradient(90deg, #38bdf8 0%, #00b4d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   1. HERO SECTION (DARK BLUEPRINT & POLYMER ENGINEERING HUB)
   ========================================================================== */
.tech-hero-ui {
  padding: 60px 0 75px;
  background: linear-gradient(135deg, #07111d 0%, #0b1c2d 60%, #081320 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid var(--tech-teal);
}

.tech-hero-ui::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.tech-hero-ui::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 180, 216, 0.4), transparent);
}

.tech-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.tech-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #38bdf8;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 22px;
  width: fit-content;
  box-shadow: 0 0 20px rgba(0, 180, 216, 0.15);
}

.pulse-beacon-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 10px #38bdf8;
  position: relative;
  display: inline-block;
  animation: pulse-beacon 2s infinite;
}

.tech-hero-title {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.15;
  color: #ffffff;
  margin: 0 0 20px;
  letter-spacing: -0.5px;
}

.tech-hero-desc {
  font-size: 16px;
  line-height: 1.7;
  color: #cbd5e1;
  margin: 0 0 28px;
  max-width: 620px;
}

.tech-hero-pills {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.tech-hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: #e2e8f0;
  backdrop-filter: blur(6px);
  transition: all 0.25s ease;
}

.tech-hero-pill:hover {
  background: rgba(0, 180, 216, 0.15);
  border-color: rgba(0, 180, 216, 0.4);
  color: #ffffff;
  transform: translateY(-2px);
}

.tech-hero-pill svg {
  color: var(--tech-cyan);
}

.tech-hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-tech-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 32px;
  background: var(--tech-teal);
  color: #07111d;
  font-size: 15.5px;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(0, 180, 216, 0.35);
  transition: all 0.25s ease;
}

.btn-tech-primary:hover {
  background: #38bdf8;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 180, 216, 0.5);
  color: #07111d;
}

.btn-tech-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-size: 15.5px;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.25s ease;
}

.btn-tech-secondary:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: #ffffff;
  transform: translateY(-2px);
  color: #ffffff;
}

/* Hero Right: Live Engineering Compass Card */
.tech-hero-card {
  background: rgba(13, 30, 50, 0.85);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 180, 216, 0.3);
  border-radius: var(--tech-radius-lg);
  padding: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  position: relative;
}

.tech-hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--tech-cyan), transparent);
}

.tech-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tech-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 180, 216, 0.15);
  color: var(--tech-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-card-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.tech-card-header span {
  font-size: 13px;
  color: #94a3b8;
  display: block;
}

.tech-quick-links-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tech-quick-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px 16px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.tech-quick-link-item:hover {
  background: rgba(0, 180, 216, 0.1);
  border-color: rgba(0, 180, 216, 0.35);
  transform: translateX(4px);
}

.quick-link-title {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  display: block;
}

.quick-link-sub {
  font-size: 12px;
  color: #94a3b8;
}

.quick-link-arrow {
  color: var(--tech-cyan);
  transition: transform 0.2s ease;
}

.tech-quick-link-item:hover .quick-link-arrow {
  transform: translateX(3px);
}

/* ==========================================================================
   2. INTERACTIVE ASTM D2000 LINE CALLOUT DECODER (FLAGSHIP BANGER TOOL)
   ========================================================================== */
.astm-decoder-section {
  padding: 85px 0;
  background: #ffffff;
}

.astm-card-container {
  background: #ffffff;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius-lg);
  box-shadow: var(--tech-shadow-md);
  padding: 40px;
  position: relative;
}

.astm-preset-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--tech-border);
}

.astm-preset-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--tech-navy);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-astm-preset {
  padding: 7px 14px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 50px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--tech-navy);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-astm-preset:hover {
  background: #e2e8f0;
  border-color: #94a3b8;
}

.btn-astm-preset.active {
  background: #0066cc;
  border-color: #0066cc;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.25);
}

/* Interactive Callout Banner */
.astm-code-banner {
  background: #0a192f;
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 30px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(10, 25, 47, 0.15);
  border: 1px solid rgba(0, 180, 216, 0.2);
}

.astm-code-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--tech-cyan);
  margin-bottom: 12px;
  display: block;
}

.astm-chips-flex {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.astm-segment {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.astm-segment:hover {
  background: rgba(0, 180, 216, 0.15);
  border-color: var(--tech-cyan);
  transform: translateY(-2px);
}

.astm-segment.active {
  background: rgba(0, 180, 216, 0.25);
  border-color: #38bdf8;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
}

.astm-segment-code {
  font-size: 20px;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 1px;
}

.astm-segment-tag {
  font-size: 10.5px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Decoder Explanations Grid */
.astm-breakdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.astm-detail-card {
  background: #f8fafc;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius);
  padding: 22px;
  transition: all 0.25s ease;
  position: relative;
}

.astm-detail-card:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: var(--tech-shadow-sm);
  transform: translateY(-2px);
}

.astm-card-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: #e0f2fe;
  color: #0369a1;
  font-size: 11.5px;
  font-weight: 800;
  margin-bottom: 12px;
}

.astm-detail-card h4 {
  font-size: 16px;
  font-weight: 800;
  color: var(--tech-navy);
  margin: 0 0 8px;
}

.astm-detail-card p {
  font-size: 13.5px;
  color: var(--tech-text-muted);
  line-height: 1.55;
  margin: 0;
}

.astm-detail-card strong {
  color: var(--tech-navy);
}

/* ==========================================================================
   3. SHORE A DUROMETER HARDNESS SLIDER & TACTILE BENCHMARK
   ========================================================================== */
.durometer-section {
  padding: 85px 0;
  background: #f8fafc;
  border-top: 1px solid var(--tech-border);
  border-bottom: 1px solid var(--tech-border);
}

.durometer-interactive-card {
  background: #ffffff;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius-lg);
  padding: 40px;
  box-shadow: var(--tech-shadow-md);
}

.duro-slider-container {
  margin: 30px 0 40px;
  text-align: center;
}

.duro-readout-box {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: #0a192f;
  color: #ffffff;
  padding: 12px 28px;
  border-radius: 50px;
  margin-bottom: 24px;
  box-shadow: 0 8px 20px rgba(10, 25, 47, 0.2);
}

.duro-number {
  font-size: 42px;
  font-weight: 900;
  color: #38bdf8;
  line-height: 1;
}

.duro-scale-title {
  font-size: 16px;
  font-weight: 700;
  color: #cbd5e1;
}

.custom-range-slider {
  width: 100%;
  max-width: 680px;
  height: 10px;
  -webkit-appearance: none;
  background: linear-gradient(90deg, #10b981 0%, #38bdf8 40%, #0066cc 70%, #f43f5e 100%);
  border-radius: 10px;
  outline: none;
  margin: 0 auto;
  display: block;
}

.custom-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid #0066cc;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s ease;
}

.custom-range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Durometer Benchmark Grid */
.duro-benchmarks-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.duro-bench-card {
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.duro-bench-card:hover {
  border-color: #94a3b8;
  transform: translateY(-2px);
}

.duro-bench-card.active {
  background: #eff6ff;
  border-color: #0066cc;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

.bench-hardness-val {
  font-size: 20px;
  font-weight: 900;
  color: var(--tech-navy);
  display: block;
  margin-bottom: 4px;
}

.bench-tactile-feel {
  font-size: 13px;
  font-weight: 700;
  color: #0066cc;
  display: block;
  margin-bottom: 6px;
}

.bench-objects {
  font-size: 11.5px;
  color: #64748b;
  line-height: 1.4;
}

/* Dynamic Hardness Info Banner */
.duro-active-info-panel {
  margin-top: 30px;
  padding: 22px 28px;
  background: #f0fdf4;
  border: 1.5px solid #86efac;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.duro-info-left strong {
  font-size: 16px;
  font-weight: 800;
  color: #166534;
  display: block;
  margin-bottom: 4px;
}

.duro-info-left span {
  font-size: 13.5px;
  color: #15803d;
}

.duro-deflection-stat {
  display: flex;
  gap: 20px;
}

.deflect-item {
  text-align: center;
}

.deflect-val {
  font-size: 18px;
  font-weight: 800;
  color: #166534;
  display: block;
}

.deflect-lbl {
  font-size: 11.5px;
  color: #15803d;
  font-weight: 600;
}

/* ==========================================================================
   4. SEARCHABLE & FILTERABLE CHEMICAL COMPATIBILITY MATRIX
   ========================================================================== */
.compat-matrix-section {
  padding: 85px 0;
  background: #ffffff;
}

.compat-filter-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.compat-search-box {
  position: relative;
  flex: 1;
  max-width: 360px;
}

.compat-search-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  border: 1.5px solid #cbd5e1;
  border-radius: 50px;
  font-size: 14px;
  font-family: inherit;
  color: var(--tech-text-dark);
  background: #f8fafc;
  transition: all 0.2s ease;
}

.compat-search-input:focus {
  outline: none;
  border-color: var(--tech-primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.search-icon-svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  pointer-events: none;
}

.compat-material-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-mat-filter {
  padding: 7px 14px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 50px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--tech-navy);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-mat-filter:hover {
  background: #e2e8f0;
}

.btn-mat-filter.active {
  background: #0066cc;
  border-color: #0066cc;
  color: #ffffff;
}

/* Enhanced Table */
.tech-table-card {
  background: #ffffff;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius-lg);
  overflow: hidden;
  box-shadow: var(--tech-shadow-md);
}

.tech-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  text-align: left;
}

.tech-data-table thead {
  background: #0a192f;
  color: #ffffff;
}

.tech-data-table th {
  padding: 16px 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border: none;
  white-space: nowrap;
}

.tech-data-table tbody tr {
  border-bottom: 1px solid #f1f5f9;
  transition: background 0.15s ease;
}

.tech-data-table tbody tr:hover {
  background: #f8fafc;
}

.tech-data-table td {
  padding: 16px 18px;
  color: #334155;
  vertical-align: middle;
}

.material-title-cell strong {
  font-size: 14.5px;
  color: var(--tech-navy);
  display: block;
}

.material-title-cell span {
  font-size: 12px;
  color: #64748b;
}

/* Rating Badges */
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 11.5px;
  font-weight: 700;
  white-space: nowrap;
}

.rating-outstanding { background: #dcfce7; color: #15803d; border: 1px solid #86efac; }
.rating-excellent { background: #e0f2fe; color: #0369a1; border: 1px solid #7dd3fc; }
.rating-good { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.rating-fair { background: #fef3c7; color: #b45309; border: 1px solid #fde68a; }
.rating-poor { background: #fee2e2; color: #b91c1c; border: 1px solid #fca5a5; }

/* ==========================================================================
   5. OFFICIAL BROCHURE REFERENCE SHEET & LIGHTBOX
   ========================================================================== */
.brochure-sheet-section {
  padding: 85px 0;
  background: #f8fafc;
  border-top: 1px solid var(--tech-border);
}

.brochure-split-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.brochure-data-box {
  background: #ffffff;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius-lg);
  padding: 34px;
  box-shadow: var(--tech-shadow-md);
}

.brochure-data-box h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--tech-navy);
  margin: 0 0 10px;
}

.brochure-data-box p {
  font-size: 14.5px;
  color: var(--tech-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.brochure-preview-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius-lg);
  overflow: hidden;
  box-shadow: var(--tech-shadow-lg);
  cursor: pointer;
  transition: all 0.3s ease;
}

.brochure-preview-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 60px rgba(0, 102, 204, 0.2);
}

.brochure-preview-card img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: top;
  display: block;
}

.brochure-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 25, 47, 0.95) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: #ffffff;
}

.overlay-zoom-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--tech-teal);
  color: #07111d;
  font-size: 13.5px;
  font-weight: 800;
  border-radius: 50px;
  width: fit-content;
  box-shadow: 0 4px 14px rgba(0, 180, 216, 0.4);
}

/* ==========================================================================
   6. APPLICATION CHECKLIST & COMPOUND QUALIFICATION
   ========================================================================== */
.checklist-section {
  padding: 85px 0;
  background: #ffffff;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 45px;
}

.checklist-card {
  background: #f8fafc;
  border: 1px solid var(--tech-border);
  border-radius: var(--tech-radius);
  padding: 28px 22px;
  position: relative;
  transition: all 0.25s ease;
}

.checklist-card:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: var(--tech-shadow-sm);
  transform: translateY(-3px);
}

.checklist-card-num {
  font-size: 32px;
  font-weight: 900;
  color: #cbd5e1;
  line-height: 1;
  margin-bottom: 12px;
}

.checklist-card:hover .checklist-card-num {
  color: var(--tech-primary);
}

.checklist-card h4 {
  font-size: 17px;
  font-weight: 800;
  color: var(--tech-navy);
  margin: 0 0 10px;
}

.checklist-card p {
  font-size: 13.5px;
  color: var(--tech-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Lab Testing Panel */
.lab-testing-strip {
  background: linear-gradient(135deg, #07111d 0%, #0d1e32 100%);
  border-radius: var(--tech-radius-lg);
  padding: 38px 45px;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  border: 1px solid rgba(0, 180, 216, 0.25);
}

.lab-strip-copy h3 {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 8px;
}

.lab-strip-copy p {
  font-size: 14.5px;
  color: #94a3b8;
  max-width: 620px;
  line-height: 1.6;
  margin: 0;
}

.btn-lab-consult {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--tech-teal);
  color: #07111d;
  font-size: 14.5px;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 6px 20px rgba(0, 180, 216, 0.35);
  transition: all 0.2s ease;
}

.btn-lab-consult:hover {
  background: #38bdf8;
  transform: translateY(-2px);
  color: #07111d;
}

/* ==========================================================================
   7. 4K DATASHEET LIGHTBOX MODAL
   ========================================================================== */
.lightbox-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 25, 47, 0.92);
  backdrop-filter: blur(8px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 30px;
}

.lightbox-content-box {
  position: relative;
  max-width: 95vw;
  max-height: 90vh;
  overflow: auto;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
}

.lightbox-content-box img {
  width: 100%;
  height: auto;
  display: block;
}

.lightbox-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(10, 25, 47, 0.85);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;
}

.lightbox-close-btn:hover {
  background: #000000;
  transform: scale(1.1);
}

/* ==========================================================================
   8. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  .tech-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .astm-breakdown-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .duro-benchmarks-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .brochure-split-grid {
    grid-template-columns: 1fr;
  }
  
  .checklist-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .tech-hero-title {
    font-size: 32px;
  }
  
  .tech-section-heading {
    font-size: 28px;
  }
  
  .astm-card-container {
    padding: 24px 18px;
  }
  
  .astm-breakdown-grid {
    grid-template-columns: 1fr;
  }
  
  .duro-benchmarks-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .checklist-grid {
    grid-template-columns: 1fr;
  }
  
  .compat-filter-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .compat-search-box {
    max-width: 100%;
  }
  
  .lab-testing-strip {
    padding: 24px 20px;
  }
}