/* ══════════════════════════════════════════════════
   Material Hub — Detail Page
   Premium material detail page for the Rossittis
   Material Hub. Uses existing design tokens.
   ══════════════════════════════════════════════════ */

/* ── Alternating Section Backgrounds ─────────────── */
    .mat-bg-alt  { background: var(--stone-50); }
    .mat-bg-white { background: var(--white); }

/* ── Breadcrumb Bar ──────────────────────────────── */
    .mat-breadcrumb-bar {
      background: var(--stone-100);
      border-bottom: 1px solid var(--stone-200);
      padding: 0.75rem 0;
    }
    .mat-breadcrumb-bar nav {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.8125rem;
      color: var(--stone-400);
      flex-wrap: wrap;
    }
    .mat-breadcrumb-bar a {
      color: var(--stone-500);
      font-weight: 500;
      transition: color 0.2s;
    }
    .mat-breadcrumb-bar a:hover {
      color: var(--stone-800);
    }
    .mat-breadcrumb-bar .sep {
      color: var(--stone-300);
      font-size: 0.75rem;
      user-select: none;
    }
    .mat-breadcrumb-bar .current {
      color: var(--stone-700);
      font-weight: 500;
    }

/* ── Hero: Image + Info ──────────────────────────── */
    .mat-hero {
      background: var(--white);
      padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(3rem, 6vw, 5rem);
      border-bottom: 1px solid var(--stone-200);
    }
    .mat-hero-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: clamp(2rem, 4vw, 4rem);
      align-items: start;
    }
    .mat-hero-image {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      aspect-ratio: 4 / 3;
      background: var(--stone-100);
    }
    .mat-hero-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .mat-hero-image:hover img {
      transform: scale(1.03);
    }
    .mat-hero-image .mat-hero-badge {
      position: absolute;
      top: 1rem;
      left: 1rem;
      background: var(--white);
      color: var(--stone-700);
      font-size: 0.6875rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 0.3rem 0.75rem;
      border-radius: 6px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    .mat-hero-info {
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .mat-hero-type {
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--red);
      margin-bottom: 0.625rem;
    }
    .mat-hero-type a {
      color: var(--red);
      text-decoration: none;
      transition: color 0.2s;
    }
    .mat-hero-type a:hover {
      color: var(--red-dark);
      text-decoration: underline;
    }
    .mat-hero-badge {
      text-decoration: none;
    }
    .mat-hero-info h1 {
      font-family: var(--font-serif);
      font-size: clamp(2rem, 3.5vw, 3rem);
      line-height: 1.1;
      letter-spacing: -0.015em;
      color: var(--stone-900);
      margin-bottom: 1rem;
    }
    .mat-hero-short {
      font-size: 1.0625rem;
      line-height: 1.7;
      color: var(--stone-500);
      max-width: 38em;
      margin-bottom: 1rem;
    }
    .mat-hero-type-note {
      font-size: 0.8125rem;
      line-height: 1.5;
      color: var(--stone-400);
      margin-bottom: 1.25rem;
    }

    /* Fact chips in hero */
    .mat-hero-facts {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 2rem;
    }
    .fact-chip {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: var(--stone-100);
      border: 1px solid var(--stone-200);
      color: var(--stone-700);
      font-size: 0.8125rem;
      font-weight: 500;
      padding: 0.4rem 0.875rem;
      border-radius: 100px;
      white-space: nowrap;
      transition: border-color 0.2s, background 0.2s;
    }
    .fact-chip:hover {
      border-color: var(--stone-300);
      background: var(--stone-200);
    }
    .fact-chip svg {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
      opacity: 0.7;
    }

    /* CTAs in hero */
    .mat-hero-avail {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.875rem;
      font-weight: 500;
      color: #2d7a3a;
      margin-bottom: 0.75rem;
    }
    .avail-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #2d7a3a;
      flex-shrink: 0;
      animation: avail-pulse 2s infinite;
    }
    @keyframes avail-pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    .mat-hero-ctas {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
    }

/* ── Formats & Surfaces ─────────────────────────── */
    .mat-formats {
      background: var(--white);
    }
    .mat-formats h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.5rem, 2.5vw, 2rem);
      color: var(--stone-900);
      margin-bottom: 1.5rem;
    }
    .mat-formats h3 {
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--stone-500);
      text-transform: uppercase;
      letter-spacing: 0.04em;
      margin-bottom: 0.75rem;
    }
    .formats-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .formats-list {
      list-style: none;
      padding: 0;
    }
    .formats-list li {
      padding: 0.5rem 0;
      border-bottom: 1px solid var(--stone-100);
      font-size: 0.9375rem;
      color: var(--stone-700);
    }
    .formats-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.375rem;
    }
    .format-tag {
      font-size: 0.75rem;
      font-weight: 500;
      color: var(--stone-600);
      background: var(--stone-100);
      padding: 0.25rem 0.625rem;
      border-radius: 4px;
      letter-spacing: 0.02em;
    }
    @media (max-width: 640px) {
      .formats-grid { grid-template-columns: 1fr; }
    }

/* ── Section Navigation (sticky) ─────────────────── */
    .mat-section-nav {
      position: sticky;
      top: 72px;
      z-index: 90;
      background: var(--white);
      border-bottom: 1px solid var(--stone-200);
    }
    .mat-section-nav-inner {
      display: flex;
      gap: 0;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .mat-section-nav-inner::-webkit-scrollbar { display: none; }
    .mat-nav-link {
      padding: 0.75rem 1.25rem;
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--stone-500);
      text-decoration: none;
      white-space: nowrap;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .mat-nav-link:hover { color: var(--stone-800); }
    .mat-nav-link.active {
      color: var(--red);
      border-bottom-color: var(--red);
    }

    /* Scroll targets: offset for sticky header + section nav */
    #mat-info, #mat-tech, #mat-formats, #mat-anwendung, #mat-pflege, #mat-stock, #mat-faq {
      scroll-margin-top: 130px;
    }

/* ── Description Layout (text + image side by side) ─ */
    .mat-description-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: start;
    }
    .mat-description-image {
      border-radius: 10px;
      overflow: hidden;
    }
    .mat-description-image img {
      width: 100%;
      height: auto;
      display: block;
    }
    .mat-desc-more[hidden] { display: none; }
    .mat-desc-toggle {
      background: none;
      border: none;
      color: var(--red);
      font-size: 0.875rem;
      font-weight: 500;
      cursor: pointer;
      padding: 0.25rem 0;
      margin-top: 0.5rem;
    }
    .mat-desc-toggle:hover { text-decoration: underline; }
    @media (max-width: 768px) {
      .mat-description-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
      .mat-description-image { position: static; }
    }

/* ── Slab Gallery ────────────────────────────────── */
    .mat-slabs { }
    .mat-slabs h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.5rem, 2.5vw, 2rem);
      color: var(--stone-900);
      margin-bottom: 0.25rem;
    }
    .mat-slabs-sub {
      color: var(--stone-500);
      font-size: 0.9375rem;
      margin-bottom: 1.5rem;
    }
    .slab-gallery {
    }
    .slab-card {
      background: var(--white);
      border: 1px solid var(--stone-200);
      border-radius: 10px;
      overflow: hidden;
      text-decoration: none;
      color: inherit;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
    }
    .slab-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 40px rgba(42,36,30,0.1);
      border-color: var(--stone-300);
    }
    .slab-card-img {
      aspect-ratio: 5 / 3;
      background: var(--stone-50);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      overflow: hidden;
    }
    .slab-card-img img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .slab-card:hover .slab-card-img img {
      transform: scale(1.05);
    }
    .slab-card-body {
      padding: 0.875rem 1rem;
    }
    .slab-card-name {
      font-family: var(--font-serif);
      font-size: 1rem;
      color: var(--stone-900);
      margin-bottom: 0.25rem;
    }
    .slab-card-meta {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .slab-card-type {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--red);
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    .slab-card-detail {
      font-size: 0.75rem;
      color: var(--stone-500);
    }
    .slab-card--sold { opacity: 0.55; }
    .slab-card--sold::after {
      content: 'Verkauft';
      position: absolute;
      top: 0.75rem;
      right: 0.75rem;
      background: rgba(0,0,0,0.65);
      color: white;
      font-size: 0.6875rem;
      font-weight: 500;
      padding: 0.15rem 0.5rem;
      border-radius: 3px;
    }
    .slab-group-heading {
      font-family: var(--font-serif);
      font-size: 1.25rem;
      color: var(--stone-800);
      margin: 2rem 0 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid var(--stone-200);
    }
    .slab-group-header {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 1rem;
      margin: 2rem 0 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid var(--stone-200);
    }
    .slab-group-header:first-child { margin-top: 0; }
    .slab-group-header .slab-group-heading {
      margin: 0;
      padding: 0;
      border: none;
    }
    .slab-group-cta {
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--red);
      text-decoration: none;
      white-space: nowrap;
    }
    .slab-group-cta:hover { text-decoration: underline; }
    .slab-group-heading:first-child { margin-top: 0; }
    .slab-group-subheading {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--stone-500);
      margin: 1.5rem 0 0.75rem;
    }
    .slab-group-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap);
    }
    @media (max-width: 768px) { .slab-group-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 480px) { .slab-group-grid { grid-template-columns: 1fr; } }

    .slab-table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      margin-bottom: 1rem;
    }
    .slab-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.875rem;
      min-width: 500px;
    }
    .slab-table th {
      text-align: left;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--stone-500);
      text-transform: uppercase;
      letter-spacing: 0.04em;
      padding: 0.625rem 0.75rem;
      border-bottom: 2px solid var(--stone-200);
    }
    .slab-table td {
      padding: 0.625rem 0.75rem;
      border-bottom: 1px solid var(--stone-100);
      color: var(--stone-700);
    }
    .slab-table tbody tr:hover {
      background: var(--stone-50);
    }
    .slab-table-sold td {
      opacity: 0.45;
      text-decoration: line-through;
    }

    .slab-gallery-loading, .slab-gallery-empty {
      grid-column: 1 / -1;
      text-align: center;
      color: var(--stone-400);
      padding: 3rem;
      font-size: 0.9375rem;
    }
    .slab-gallery-cta {
      text-align: center;
      padding: 1.5rem 0 0;
    }
    @media (max-width: 768px) { .slab-gallery { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 480px) { .slab-gallery { grid-template-columns: 1fr; } }

/* ── Description Section ─────────────────────────── */
    .mat-description {
    }
    .mat-description h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.25rem, 2.5vw, 2rem);
    }
    .mat-description-body {
      max-width: 720px;
    }
    .mat-description-body p {
      font-size: 1.0625rem;
      line-height: 1.75;
      color: var(--stone-700);
      margin-bottom: 1.25rem;
    }
    .mat-description-body p:last-child {
      margin-bottom: 0;
    }

/* ── Technical Data Grid ─────────────────────────── */
    .mat-technical {
    }
    .mat-technical h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--gap);
    }
    .tech-card {
      background: var(--stone-50);
      border: 1px solid var(--stone-200);
      border-radius: 12px;
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    .tech-card:hover {
      border-color: var(--stone-300);
      box-shadow: 0 4px 16px rgba(42, 36, 30, 0.06);
    }
    .tech-card-icon {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: var(--stone-100);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--red);
      flex-shrink: 0;
      transition: background 0.2s;
    }
    .tech-card:hover .tech-card-icon {
      background: rgba(180, 28, 28, 0.1);
    }
    .tech-card-icon svg {
      width: 20px;
      height: 20px;
    }
    .tech-card-label {
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--stone-500);
      letter-spacing: 0.02em;
    }
    .tech-card-value {
      font-family: var(--font-sans);
      font-size: 1.375rem;
      font-weight: 600;
      color: var(--stone-900);
      line-height: 1.2;
    }
    .tech-card-unit {
      font-size: 0.8125rem;
      font-weight: 400;
      color: var(--stone-400);
      margin-left: 0.25rem;
    }

    .tech-disclaimer {
      font-size: 0.8125rem;
      color: var(--stone-400);
      margin: -0.25rem 0 1.5rem;
    }

/* ── Application Suitability — Grouped by relevance ── */
    .mat-applications {
    }
    .mat-applications h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    }

    /* Groups layout: ideal + bedingt side-by-side, ungeeignet full-width below */
    .app-suit-groups {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: clamp(2rem, 4vw, 4rem);
    }
    .app-suit-group-ungeeignet {
      grid-column: 1 / -1;
    }
    .app-suit-group-title {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-family: var(--font-sans);
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--stone-500);
      padding-bottom: 0.75rem;
      border-bottom: 1px solid var(--stone-200);
      margin-bottom: 0;
    }
    .app-suit-group-title svg {
      width: 18px;
      height: 18px;
      opacity: 0.6;
    }

    /* Group title accents */
    .app-suit-group-ideal .app-suit-group-title {
      color: #16a34a;
      border-bottom-color: rgba(22, 163, 74, 0.2);
    }
    .app-suit-group-ideal .app-suit-group-title svg {
      color: #16a34a;
      opacity: 1;
    }
    .app-suit-group-bedingt .app-suit-group-title {
      color: #ca8a04;
      border-bottom-color: rgba(234, 179, 8, 0.2);
    }
    .app-suit-group-bedingt .app-suit-group-title svg {
      color: #ca8a04;
      opacity: 1;
    }
    .app-suit-group-ungeeignet .app-suit-group-title {
      color: var(--stone-400);
      border-bottom-color: var(--stone-200);
    }
    .app-suit-group-ungeeignet .app-suit-group-title svg {
      color: var(--stone-400);
      opacity: 0.7;
    }

    /* Application list */
    .app-suit-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .app-suit-item {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.75rem 0;
      border-bottom: 1px solid var(--stone-100);
      transition: background 0.2s;
    }
    .app-suit-item:last-child {
      border-bottom: none;
    }
    .app-suit-item:hover {
      background: rgba(42, 36, 30, 0.015);
    }
    .app-suit-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .app-suit-icon svg {
      width: 18px;
      height: 18px;
    }
    .app-suit-name {
      flex: 1;
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--stone-800);
      text-decoration: none;
      transition: color 0.2s;
    }
    a.app-suit-name:hover {
      color: var(--red);
    }
    .app-suit-indicator {
      font-size: 0.8125rem;
      font-weight: 600;
      white-space: nowrap;
      flex-shrink: 0;
    }

    /* Suitability colours */
    .suit-ideal .app-suit-icon {
      background: rgba(22, 163, 74, 0.1);
      color: #16a34a;
    }
    .suit-ideal .app-suit-indicator { color: #16a34a; }

    .suit-bedingt .app-suit-icon {
      background: rgba(234, 179, 8, 0.1);
      color: #ca8a04;
    }
    .suit-bedingt .app-suit-indicator { color: #ca8a04; }

    .suit-ungeeignet .app-suit-icon {
      background: rgba(220, 38, 38, 0.06);
      color: #dc2626;
    }
    .suit-ungeeignet .app-suit-indicator {
      color: var(--stone-300);
    }
    .suit-ungeeignet .app-suit-name {
      color: var(--stone-400);
      text-decoration: line-through;
    }

/* ── Surfaces / Oberflächen ─────────────────────── */
    .mat-surfaces h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: 0.5rem;
    }
    .mat-surfaces-intro {
      font-size: 1.0625rem;
      line-height: 1.65;
      color: var(--stone-600);
      margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
      max-width: 720px;
    }
    .mat-surfaces-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 1.25rem;
    }
    .mat-surface-card {
      background: var(--white);
      border: 1px solid var(--stone-200);
      border-radius: 8px;
      padding: 1.5rem;
    }
    .mat-bg-white .mat-surface-card {
      background: var(--stone-50);
    }
    .mat-surface-card h3 {
      font-family: var(--font-sans);
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--stone-900);
      margin: 0 0 0.5rem;
    }
    .mat-surface-card p {
      font-size: 0.9375rem;
      line-height: 1.65;
      color: var(--stone-600);
      margin: 0;
    }

/* ── Care & Processing ───────────────────────────── */
    .mat-care {
    }
    .mat-care h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.25rem, 2.5vw, 2rem);
    }
    .mat-care-body {
      max-width: 720px;
    }
    .mat-care-body p {
      font-size: 1.0625rem;
      line-height: 1.75;
      color: var(--stone-700);
      margin-bottom: 1.25rem;
    }
    .mat-care-body p:last-child {
      margin-bottom: 0;
    }
    .mat-care-body ul {
      list-style: none;
      padding: 0;
      margin-bottom: 1.5rem;
    }
    .mat-care-body li {
      position: relative;
      padding-left: 1.5rem;
      font-size: 1rem;
      line-height: 1.7;
      color: var(--stone-700);
      margin-bottom: 0.5rem;
    }
    .mat-care-body li::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0.55em;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--red);
    }

/* ── FAQ Accordion ───────────────────────────────── */
    .mat-faq {
    }
    .mat-faq h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    }
    .faq-list {
      max-width: 800px;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }
    .faq-item {
      background: var(--white);
      border: 1px solid var(--stone-200);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    .faq-item[open] {
      border-color: var(--stone-300);
      box-shadow: 0 4px 20px rgba(42, 36, 30, 0.06);
    }
    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.25rem 1.5rem;
      cursor: pointer;
      list-style: none;
      user-select: none;
      font-family: var(--font-sans);
      font-size: 1rem;
      font-weight: 500;
      color: var(--stone-800);
      transition: background 0.2s, color 0.2s;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::marker { display: none; content: ''; }
    .faq-item summary:hover {
      background: var(--stone-50);
      color: var(--stone-900);
    }
    .faq-item summary .faq-chevron {
      width: 20px;
      height: 20px;
      color: var(--stone-400);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      flex-shrink: 0;
    }
    .faq-item[open] summary .faq-chevron {
      transform: rotate(180deg);
    }
    .faq-item-body {
      padding: 0 1.5rem 1.5rem;
      border-top: 1px solid var(--stone-100);
    }
    .faq-item-body p {
      font-size: 0.9375rem;
      line-height: 1.7;
      color: var(--stone-600);
      margin-top: 1rem;
    }

/* ── Availability CTA ────────────────────────────── */
    .mat-availability {
      background: var(--white);
      padding: clamp(3rem, 6vw, 5rem) 0;
    }
    .avail-card {
      background: var(--stone-100);
      border: 1px solid var(--stone-200);
      border-radius: 16px;
      padding: clamp(2.5rem, 4vw, 4rem);
      text-align: center;
      max-width: 720px;
      margin: 0 auto;
      position: relative;
      overflow: hidden;
    }
    .avail-card::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -120px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(180,28,28,0.06), transparent 70%);
      pointer-events: none;
    }
    .avail-card h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: 0.75rem;
      position: relative;
    }
    .avail-card p {
      font-size: 1.0625rem;
      line-height: 1.65;
      color: var(--stone-500);
      max-width: 32em;
      margin: 0 auto 2rem;
      position: relative;
    }
    .avail-card-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.75rem;
      position: relative;
    }

/* ── Related Materials Grid ──────────────────────── */
    .mat-related {
    }
    .mat-related h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      line-height: 1.15;
      color: var(--stone-900);
      margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap);
    }
    .related-card {
      background: var(--white);
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--stone-200);
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      display: block;
      text-decoration: none;
      color: inherit;
    }
    .related-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 40px rgba(42, 36, 30, 0.1);
      border-color: var(--stone-300);
    }
    .related-card-img {
      aspect-ratio: 4 / 3;
      background: var(--stone-100);
      overflow: hidden;
    }
    .related-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .related-card:hover .related-card-img img {
      transform: scale(1.06);
    }
    .related-card-body {
      padding: 1.25rem;
    }
    .related-card-type {
      font-size: 0.6875rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--red);
      margin-bottom: 0.375rem;
    }
    .related-card-name {
      font-family: var(--font-serif);
      font-size: 1.125rem;
      color: var(--stone-900);
      margin-bottom: 0.375rem;
    }
    .related-card-origin {
      font-size: 0.8125rem;
      color: var(--stone-500);
    }

/* ── Synonyms ────────────────────────────────────── */
    .mat-synonyms {
      background: var(--white);
      border-top: 1px solid var(--stone-200);
      padding: 1.5rem 0;
    }
    .mat-synonyms p {
      font-size: 0.875rem;
      color: var(--stone-400);
      line-height: 1.6;
    }
    .mat-synonyms strong {
      color: var(--stone-500);
      font-weight: 500;
    }

/* ── Responsive: 1024px ──────────────────────────── */
    @media (max-width: 1024px) {
      .mat-hero-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .mat-hero-image {
        max-height: 400px;
      }
      .tech-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .app-suit-groups {
        grid-template-columns: 1fr 1fr;
      }
      .related-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

/* ── Responsive: 640px ───────────────────────────── */
    @media (max-width: 640px) {
      .mat-hero {
        padding: 1.5rem 0 2rem;
      }
      .mat-hero-info h1 {
        font-size: 1.75rem;
      }
      .mat-hero-facts {
        gap: 0.375rem;
      }
      .fact-chip {
        font-size: 0.75rem;
        padding: 0.3rem 0.625rem;
      }
      .mat-hero-ctas {
        flex-direction: column;
      }
      .mat-hero-ctas .btn {
        width: 100%;
        justify-content: center;
      }
      .tech-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
      }
      .tech-card {
        padding: 1.125rem;
      }
      .tech-card-value {
        font-size: 1.125rem;
      }
      .app-suit-groups {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
      .app-suit-group-ungeeignet {
        grid-column: 1;
      }
      .avail-card {
        padding: 2rem 1.5rem;
      }
      .avail-card-actions {
        flex-direction: column;
        align-items: center;
      }
      .avail-card-actions .btn {
        width: 100%;
        justify-content: center;
      }
      .related-grid {
        grid-template-columns: 1fr;
      }
      .faq-item summary {
        font-size: 0.9375rem;
        padding: 1rem 1.25rem;
      }
      .faq-item-body {
        padding: 0 1.25rem 1.25rem;
      }
    }