:root {
      --transition-fast: 150ms ease;
      --transition-default: 200ms ease;
      --transition-slow: 300ms ease;
    }

    /* HASSL palette — warm cream paper, deep navy ink, refined teal */
    :root {
      --bg-primary: #EDE5D2;
      --bg-deeper: #E0D7BF;
      --bg-surface: #FBF7EE;
      --bg-surface-hover: #FFFFFF;
      --bg-elevated: #FFFFFF;
      --text-primary: #181F2C;
      --text-secondary: rgba(24, 31, 44, 0.72);
      --text-muted: rgba(24, 31, 44, 0.45);
      --accent-teal: #2D7F6F;
      --accent-teal-hover: #1F6A5C;
      --accent-teal-muted: rgba(45, 127, 111, 0.12);
      --accent-cream: #ECE5D6;
      --accent-cream-muted: rgba(236, 229, 214, 0.6);
      --accent-rose: #A8596A;
      --accent-rose-muted: rgba(168, 89, 106, 0.10);
      --accent-sage: #5A7D6D;
      --accent-sage-muted: rgba(90, 125, 109, 0.10);
      --border-subtle: rgba(24, 31, 44, 0.10);
      --border-medium: rgba(24, 31, 44, 0.18);
      --border-accent: rgba(45, 127, 111, 0.28);
      --nav-bg: rgba(245, 239, 229, 0.92);
      --nav-border: rgba(24, 31, 44, 0.08);
      --shadow-glow: 0 0 20px rgba(45, 127, 111, 0.18);
      --shadow-glow-lg: 0 0 40px rgba(45, 159, 147, 0.4);
      --shadow-glow-rose: 0 0 20px rgba(201, 123, 139, 0.25);
    }

    /* ---- Font tokens ---- */
    :root {
      --font-display: 'Fraunces', 'New York', Georgia, serif;   /* HASSL-style serif for headlines */
      --font-body: 'Manrope', system-ui, -apple-system, sans-serif;
      --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, monospace;
    }

    /* ---- Reset & Base ---- */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-body);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
      transition: background-color 0.2s ease, color 0.1s ease;
    }

    a { color: var(--accent-teal); text-decoration: none; transition: color var(--transition-default); }
    a:hover { color: var(--accent-teal-hover); }

    img { max-width: 100%; height: auto; display: block; }

    /* ---- Scrolling Code Background ---- */
    .scrolling-code-bg {
      position: fixed;
      inset: 0;
      overflow: hidden;
      pointer-events: none;
      z-index: -1;
    }

    /* ---- Navigation ---- */
    .nav-bar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--nav-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--nav-border);
      padding: 0 1.5rem;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .nav-logo {
      font-family: var(--font-mono);
      color: var(--text-primary);
      line-height: 1.05;
      display: inline-block;
      white-space: nowrap;
      text-decoration: none;
    }

    .nav-logo .brand {
      display: block;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.18em;
    }

    .nav-logo .dot {
      color: var(--accent-teal);
      margin: 0 0.25em;
      font-weight: 500;
    }

    .nav-logo .sub {
      display: block;
      color: var(--text-muted);
      font-size: 0.6rem;
      letter-spacing: 0.22em;
      font-weight: 500;
      line-height: 1;
      margin-top: 3px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }

    .nav-link {
      font-family: var(--font-body);
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-secondary);
      text-decoration: none;
      transition: color var(--transition-default);
      position: relative;
    }

    .nav-link:hover { color: var(--text-primary); }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px; left: 0;
      width: 0; height: 2px;
      background: var(--accent-teal);
      transition: width var(--transition-slow);
    }

    .nav-link:hover::after { width: 100%; }

    .nav-mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-primary);
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* ---- Sections ---- */
    .section {
      width: 100%;
      padding: 6rem 1.5rem;
      position: relative;
      z-index: 1;
    }

    .section-content {
      max-width: 80rem;
      margin: 0 auto;
    }

    .breadcrumb-prefix {
      font-family: var(--font-mono);
      font-size: 0.875rem;
      color: var(--accent-teal);
      letter-spacing: 0.05em;
      margin-bottom: 1rem;
      display: block;
    }

    .section-title {
      font-family: var(--font-display);
      font-size: clamp(2rem, 4.2vw, 2.6rem);
      font-weight: 500;
      font-variation-settings: 'opsz' 96;
      letter-spacing: -0.01em;
      line-height: 1.15;
      margin-bottom: 1rem;
    }

    .section-subtitle {
      color: var(--text-secondary);
      font-size: 1.125rem;
      max-width: 640px;
      line-height: 1.6;
      margin-bottom: 3rem;
    }

    /* ---- Hero ---- */
    .hero {
      padding: 5rem 1.5rem 4rem;
    }

    .hero-content {
      max-width: 80rem;
      margin: 0 auto;
      width: 100%;
    }

    .hero-text h1 {
      font-family: var(--font-display);
      font-size: clamp(3rem, 8vw, 5.4rem);
      font-weight: 600;
      font-variation-settings: 'opsz' 144;
      letter-spacing: -0.015em;
      line-height: 1;
      margin-bottom: 1.5rem;
    }
    .hero-text h1 .accent-line {
      color: var(--accent-teal);
      font-style: italic;        /* Fraunces italic gives a strong hand-drawn look */
      font-weight: 500;
    }

    .hero-text .tagline {
      font-family: var(--font-mono);
      font-size: 0.875rem;
      color: var(--accent-rose);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 1rem;
    }

    .hero-text p {
      color: var(--text-secondary);
      font-size: 1.125rem;
      line-height: 1.7;
      max-width: 520px;
      margin-bottom: 2rem;
    }

    .hero-visual {
      position: relative;
    }

    .hero-visual img {
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
    }

    .hero-badge {
      position: absolute;
      bottom: -1rem;
      right: -1rem;
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border-accent);
      border-radius: var(--radius-lg);
      padding: 0.75rem 1.25rem;
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--accent-teal);
    }

    /* ---- Buttons ---- */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.875rem 2rem;
      font-size: 0.875rem;
      font-weight: 600;
      font-family: var(--font-body);
      color: white;
      background: var(--accent-teal);
      border: none;
      border-radius: var(--radius-lg);
      cursor: pointer;
      transition: all var(--transition-default);
      gap: 0.5rem;
      text-decoration: none;
    }

    .btn-primary:hover {
      background: var(--accent-teal-hover);
      box-shadow: var(--shadow-glow);
      color: white;
      transform: translateY(-1px);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.875rem 2rem;
      font-size: 0.875rem;
      font-weight: 600;
      font-family: var(--font-body);
      color: var(--text-primary);
      background: transparent;
      border: 1px solid var(--border-medium);
      border-radius: var(--radius-lg);
      cursor: pointer;
      transition: all var(--transition-default);
      text-decoration: none;
      gap: 0.5rem;
    }

    .btn-ghost:hover {
      background: var(--bg-surface-hover);
      border-color: var(--accent-teal);
      color: var(--text-primary);
    }

    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    /* ---- Glass Card ---- */
    .glass-card {
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 1.75rem;
      transition: all 300ms ease;
    }

    .glass-card:hover {
      background: var(--bg-surface-hover);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .glass-card .card-number {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--accent-teal);
      margin-bottom: 0.75rem;
      font-weight: 600;
    }

    .glass-card h3 {
      font-family: var(--font-display);
      font-size: 1.25rem;
      font-weight: 600;
      letter-spacing: -0.02em;
      margin-bottom: 0.75rem;
    }

    .glass-card p {
      color: var(--text-secondary);
      font-size: 0.9rem;
      line-height: 1.6;
    }

    /* ---- Tags ---- */
    .tag {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      font-family: var(--font-mono);
      font-size: 0.75rem;
      font-weight: 500;
      border-radius: var(--radius-full);
      letter-spacing: 0.02em;
    }

    .tag-teal { background: var(--accent-teal-muted); color: var(--accent-teal); }
    .tag-rose { background: var(--accent-rose-muted); color: var(--accent-rose); }
    .tag-sage { background: var(--accent-sage-muted); color: var(--accent-sage); }

    /* ---- Module Grid ---- */
    .module-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    /* ---- Concept Split ---- */
    .concept-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: start;
    }

    .concept-block {
      padding: 2.5rem;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-subtle);
      position: relative;
      overflow: hidden;
    }

    .concept-block::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
    }

    .concept-block.protect { background: rgba(201, 123, 139, 0.06); }
    .concept-block.protect::before { background: var(--accent-rose); }
    .concept-block.prevent { background: rgba(45, 159, 147, 0.06); }
    .concept-block.prevent::before { background: var(--accent-teal); }

    .concept-block .icon {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    .concept-block h3 {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 0.5rem;
    }

    .concept-block .label {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 1rem;
    }

    .concept-block.protect .label { color: var(--accent-rose); }
    .concept-block.prevent .label { color: var(--accent-teal); }

    .concept-block p {
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .concept-block ul {
      list-style: none;
      margin-top: 1rem;
    }

    .concept-block ul li {
      color: var(--text-secondary);
      padding: 0.35rem 0;
      padding-left: 1.25rem;
      position: relative;
      font-size: 0.9rem;
    }

    .concept-block.protect ul li::before {
      content: '- ';
      position: absolute;
      left: 0;
      color: var(--accent-rose);
      font-weight: 700;
    }

    .concept-block.prevent ul li::before {
      content: '+ ';
      position: absolute;
      left: 0;
      color: var(--accent-teal);
      font-weight: 700;
    }

    /* ---- Quote Block ---- */
    .quote-block {
      border-left: 3px solid var(--accent-teal);
      padding: 2rem 2.5rem;
      background: var(--bg-surface);
      border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
      margin: 3rem 0;
    }

    .quote-block blockquote {
      font-family: var(--font-display);
      font-size: clamp(1.25rem, 3vw, 1.75rem);
      font-weight: 600;
      letter-spacing: -0.02em;
      line-height: 1.3;
    }

    .quote-block blockquote .highlight {
      color: var(--accent-teal);
    }

    .quote-block cite {
      display: block;
      margin-top: 1rem;
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--text-muted);
      font-style: normal;
      letter-spacing: 0.05em;
    }

    /* ---- Phase Framework ---- */
    .phase-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      position: relative;
    }

    .phase-grid::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 5%;
      right: 5%;
      height: 2px;
      background: var(--accent-teal);
      z-index: 0;
      opacity: 0.15;
    }

    .phase-item {
      text-align: center;
      padding: 2rem 1.5rem;
      position: relative;
      z-index: 1;
    }

    .phase-dot {
      width: 48px; height: 48px;
      border-radius: 50%;
      margin: 0 auto 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-mono);
      font-size: 0.875rem;
      font-weight: 600;
      border: 2px solid var(--border-medium);
      background: var(--bg-primary);
      transition: all var(--transition-slow);
    }

    .phase-item:first-child .phase-dot { border-color: var(--accent-rose); color: var(--accent-rose); }
    .phase-item:nth-child(2) .phase-dot { border-color: var(--accent-teal); color: var(--accent-teal); }
    .phase-item:nth-child(3) .phase-dot { border-color: var(--accent-sage); color: var(--accent-sage); }
    .phase-item:last-child .phase-dot { border-color: var(--accent-teal); color: var(--accent-teal); background: var(--accent-teal); color: var(--bg-primary); }

    .phase-item h4 {
      font-size: 1.125rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 0.5rem;
    }

    .phase-item p {
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    /* ---- Media Section ---- */
    .media-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 2rem;
      align-items: start;
    }

    .video-wrapper {
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      background: #000;
    }

    .video-wrapper video {
      width: 100%;
      display: block;
    }

    .audio-card {
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
      margin-bottom: 1rem;
    }

    .audio-card h4 {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 0.25rem;
    }

    .audio-card .duration {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-muted);
      margin-bottom: 0.75rem;
    }

    .audio-card audio {
      width: 100%;
      height: 36px;
    }

    /* ---- Disruption Tactics ---- */
    .tactics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.25rem;
    }

    .tactic-card {
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
      text-align: center;
      transition: all 300ms ease;
    }

    .tactic-card:hover {
      border-color: var(--border-accent);
      transform: translateY(-2px);
    }

    .tactic-card .tactic-icon {
      font-size: 1.75rem;
      margin-bottom: 0.75rem;
    }

    .tactic-card h4 {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .tactic-card p {
      color: var(--text-muted);
      font-size: 0.8rem;
      line-height: 1.5;
    }

    /* ---- Scenarios ---- */
    .scenario-list {
      display: grid;
      gap: 1.25rem;
    }

    .scenario-item {
      display: grid;
      grid-template-columns: auto 1fr auto;
      gap: 1.5rem;
      align-items: center;
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 1.5rem 2rem;
      transition: all 300ms ease;
    }

    .scenario-item:hover {
      border-color: var(--border-accent);
    }

    .scenario-icon {
      font-size: 1.5rem;
      width: 48px; height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--accent-teal-muted);
      border-radius: var(--radius-md);
    }

    .scenario-text h4 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 0.25rem;
    }

    .scenario-text p {
      color: var(--text-secondary);
      font-size: 0.85rem;
    }

    /* ---- Stats Row ---- */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin: 4rem 0;
    }

    .stat-item {
      text-align: center;
      padding: 2rem 1rem;
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
    }

    .stat-item .stat-number {
      font-family: var(--font-display);
      font-size: 2.5rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      color: var(--accent-teal);
    }

    .stat-item .stat-label {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-muted);
      letter-spacing: 0.05em;
      margin-top: 0.25rem;
    }

    /* ---- CTA Section ---- */
    .cta-section {
      text-align: center;
      padding: 6rem 1.5rem;
      position: relative;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at center, rgba(45, 159, 147, 0.08) 0%, transparent 70%);
      pointer-events: none;
    }

    .cta-section h2 {
      font-family: var(--font-display);
      font-size: clamp(2.2rem, 5vw, 3.2rem);
      font-weight: 500;
      font-variation-settings: 'opsz' 144;
      letter-spacing: -0.012em;
      line-height: 1.05;
      margin-bottom: 1rem;
    }
    .cta-title {
      font-family: var(--font-display);
      font-size: clamp(2rem, 4.2vw, 2.8rem);
      font-weight: 500;
      font-variation-settings: 'opsz' 144;
      letter-spacing: -0.01em;
      line-height: 1.1;
    }

    .cta-section p {
      color: var(--text-secondary);
      font-size: 1.125rem;
      max-width: 560px;
      margin: 0 auto 2rem;
    }

    /* ---- Infographic Section ---- */
    .infographic-wrapper {
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      margin-top: 2rem;
    }

    /* ---- Markmap (interactive mind map) ---- */
    .markmap-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      background: var(--bg-deeper);
      margin-top: 1.25rem;
      padding: 0.5rem;
    }
    .markmap-wrap .markmap {
      width: 100%;
      height: 520px;
    }
    /* Hide the raw markdown text the autoloader replaces */
    .markmap-wrap .markmap:not(svg) {
      color: transparent;
    }

    /* ---- Audio Players ---- */
    .audio-players-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }

    .audio-player-card {
      background: var(--bg-surface);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      transition: border-color 0.3s ease;
    }

    .audio-player-card.is-playing {
      border-color: var(--border-accent);
      box-shadow: var(--shadow-glow);
    }

    .ap-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .ap-duration {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .ap-title {
      font-size: 1.1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.3;
    }

    .ap-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* Equaliser canvas */
    .ap-visualiser {
      width: 100%;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--bg-elevated);
      display: block;
      opacity: 0.9;
    }

    /* Controls row */
    .ap-controls {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .ap-play-btn {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: none;
      background: var(--accent-teal);
      color: var(--bg-primary);
      font-size: 0.8rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: all 0.2s ease;
      padding-left: 2px; /* optical centre for play icon */
    }

    .ap-play-btn:hover { background: var(--accent-teal-hover); transform: scale(1.05); }
    .ap-play-btn.paused { padding-left: 0; }

    .ap-progress-wrap {
      flex: 1;
      height: 4px;
      background: var(--border-subtle);
      border-radius: var(--radius-full);
      cursor: pointer;
      position: relative;
    }

    .ap-progress-bar {
      height: 100%;
      width: 0%;
      background: var(--accent-teal);
      border-radius: var(--radius-full);
      transition: width 0.1s linear;
      pointer-events: none;
    }

    .ap-time {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-muted);
      white-space: nowrap;
      min-width: 3.5rem;
      text-align: right;
    }

    /* Transcript panel */
    .ap-transcript {
      height: 180px;
      overflow-y: auto;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      background: rgba(0,0,0,0.15);
      padding: 0.75rem;
      scrollbar-width: thin;
      scrollbar-color: var(--border-medium) transparent;
    }

    .ap-transcript::-webkit-scrollbar { width: 4px; }
    .ap-transcript::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 2px; }

    .ap-transcript-inner {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .ap-cue {
      font-size: 0.8rem;
      line-height: 1.5;
      color: var(--text-muted);
      padding: 0.2rem 0.4rem;
      border-radius: 4px;
      cursor: pointer;
      transition: all 0.15s ease;
    }

    .ap-cue:hover { color: var(--text-secondary); background: var(--bg-elevated); }

    .ap-cue.active {
      color: var(--accent-teal);
      background: var(--accent-teal-muted);
      border-left: 3px solid var(--accent-teal);
      padding-left: 0.8rem;
      font-weight: 600;
      box-shadow: 0 0 0 1px var(--accent-teal-muted);
      animation: ap-cue-pop 220ms cubic-bezier(0.16, 1, 0.3, 1);
    }
    @keyframes ap-cue-pop {
      0%   { transform: scale(1); }
      40%  { transform: scale(1.018); }
      100% { transform: scale(1); }
    }
    @media (prefers-reduced-motion: reduce) {
      .ap-cue.active { animation: none; }
    }

    .ap-transcript-loading {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      color: var(--text-muted);
      text-align: center;
      padding: 2rem 0;
    }

    @media (max-width: 900px) {
      .audio-players-grid { grid-template-columns: 1fr; }
    }

    /* ---- Developer Credit Footer ---- */
    .dev-credit {
      padding: 2rem;
      text-align: center;
      border-top: 1px solid var(--border-subtle);
      font-family: var(--font-mono);
      font-size: 0.65rem;
      color: var(--text-muted);
      letter-spacing: 0.05em;
      position: relative;
      z-index: 1;
    }

    .dev-credit a { color: var(--accent-teal); text-decoration: none; }
    .dev-credit a.dev-name { color: var(--text-secondary); }
    .dev-credit a:hover { text-decoration: underline; }

    /* ---- Dot Grid ---- */
    .dot-grid {
      background-image: radial-gradient(circle, rgba(24, 31, 44, 0.05) 1px, transparent 1px);
      background-size: 24px 24px;
    }

    /* ---- Divider ---- */
    .section-divider {
      width: 100%;
      max-width: 80rem;
      margin: 0 auto;
      height: 1px;
      background: var(--border-subtle);
    }

    /* ---- Animations ---- */
    @keyframes fadeUp {
      from { transform: translateY(24px); opacity: 0; }
      to { transform: translateY(0); opacity: 1; }
    }

    .animate-in {
      opacity: 0;
      animation: fadeUp 0.6s ease forwards;
    }

    .delay-1 { animation-delay: 0.1s; }
    .delay-2 { animation-delay: 0.2s; }
    .delay-3 { animation-delay: 0.3s; }
    .delay-4 { animation-delay: 0.4s; }
    .delay-5 { animation-delay: 0.5s; }
    .delay-6 { animation-delay: 0.6s; }

    /* ---- Responsive ---- */
    @media (max-width: 1024px) {
      .module-grid { grid-template-columns: repeat(2, 1fr); }
      .concept-split { grid-template-columns: 1fr; }
      .media-grid { grid-template-columns: 1fr; }
      .phase-grid { grid-template-columns: repeat(2, 1fr); }
      .phase-grid::before { display: none; }
      .tactics-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-row { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 640px) {
      .nav-links { display: none; }
      .nav-mobile-toggle { display: block; }
      .module-grid { grid-template-columns: 1fr; }
      .tactics-grid { grid-template-columns: 1fr; }
      .phase-grid { grid-template-columns: 1fr; }
      .stats-row { grid-template-columns: 1fr; }
      .scenario-item { grid-template-columns: 1fr; text-align: center; }
      .scenario-icon { margin: 0 auto; }
      .hero { min-height: auto; padding: 3rem 1rem; }
      .section { padding: 4rem 1rem; }
    }