/* ═══════════════════════════════════════════════════════════════════════
   GRYD Design System — case-study-modal.css
   Confident Amber 2026 · maju.me
   ───────────────────────────────────────────────────────────────────────
   Everything needed to render an open case study: the modal shell,
   CEO quote block, artifact strip + lightbox, meta bar, sidebar TOC,
   research/decision/outcomes/lessons/ethics sections, and the
   Presentation Mode slideshow overlay. None of this is needed for the
   initial page render — only once a visitor opens a case study — so it
   is safe to defer/lazy-load later if that becomes worth doing.

   Depends on tokens.css (design tokens) being loaded first.

   Load order in <head>:
     1. tokens.css
     2. styles.css
     3. case-study-modal.css   ← this file
     4. maju-enhancements.css
═══════════════════════════════════════════════════════════════════════ */


/* ═══ Case Study Modal (base structure) (was styles.css lines 1203-1356) ═══ */
  /* ─── Case Study Modal ─── */
  .cs-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: stretch;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.35s ease;
    isolation: isolate;
  }
  .cs-overlay.open {
    opacity: 1;
    pointer-events: all;
  }
  .cs-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15,15,15,0.6);
    backdrop-filter: blur(6px);
  }
  html[data-theme="dark"] .cs-backdrop { background: rgba(0,0,0,0.75); }

  .cs-panel {
    position: relative;
    z-index: 1;
    width: min(760px, 100vw);
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--white);
    margin-left: auto;
    transform: translateX(40px);
    transition: transform 0.45s cubic-bezier(0.22,1,0.36,1);
    display: flex;
    flex-direction: column;
  }
  .cs-overlay.open .cs-panel {
    transform: translateX(0);
  }

  .cs-panel::-webkit-scrollbar { width: 4px; }
  .cs-panel::-webkit-scrollbar-track { background: transparent; }
  .cs-panel::-webkit-scrollbar-thumb { background: var(--mist); border-radius: 2px; }

  .cs-header {
    padding: 28px 40px 24px;
    border-bottom: 0.5px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 10;
  }
  .cs-close {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    border: 0.5px solid var(--border);
    background: transparent;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: var(--subtle);
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
  }
  .cs-close:hover { background: var(--ghost); color: var(--ink); transform: scale(1.08); }

  .cs-body { padding: 36px 40px; flex: 1; }

  .cs-hero-visual {
    width: 100%;
    height: 200px;
    background: var(--canvas);
    border-radius: var(--radius-lg);
    border: 0.5px solid var(--border);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
  }

  .cs-metric-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 32px;
  }
  .cs-metric {
    background: var(--canvas);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
  }
  .cs-metric-val { font-size: 22px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 2px; }
  .cs-metric-lbl { font-size: 10px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--subtle); font-family: var(--font-mono); }

  .cs-section-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--subtle);
    font-family: var(--font-mono);
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 0.5px solid var(--border);
  }
  .cs-body p { font-size: 14px; color: var(--mid); line-height: 1.75; margin-bottom: 24px; }
  .cs-body h3 { font-size: 17px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; margin-bottom: 8px; }

  .cs-tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 28px; }

  .cs-process-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 14px 0;
    border-bottom: 0.5px solid var(--border);
  }
  .cs-process-step:last-child { border-bottom: none; }
  .cs-step-num {
    width: 24px; height: 24px;
    border-radius: var(--radius-xs);
    background: var(--ink);
    color: var(--white);
    font-size: 10px;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono);
    flex-shrink: 0;
    margin-top: 1px;
  }
  html[data-theme="dark"] .cs-step-num { background: var(--ink); color: var(--canvas); }
  .cs-step-content h4 { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 3px; }
  .cs-step-content p { font-size: 12px; color: var(--mid); line-height: 1.6; margin-bottom: 0; }

  .cs-footer-cta {
    margin: 32px 0 0;
    padding: 20px;
    background: var(--canvas);
    border-radius: var(--radius-lg);
    border: 0.5px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
  }
  .cs-footer-cta p { font-size: 13px; color: var(--mid); margin: 0; }


  /* ── Dark mode: cs-body paragraph text (colocated — was orphaned ~260 lines away) ── */
  /* ─── Dark mode: cs-body paragraph text — ensure readability ─── */
  html[data-theme="dark"] .cs-body p { color: var(--mid); }
  html[data-theme="dark"] .cs-body h4 { color: var(--ink); }


/* ═══ Case Study Modal Styles (was styles.css lines 1679-2086) ═══ */
  /* ─── Case Study Modal Styles ─── */
  #cs-page {
    background: var(--white);
    font-family: var(--font-sans);
    color: var(--ink);
    animation: csm-fade-in 0.35s var(--ease-out) both;
  }
  @keyframes csm-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* ── Reading progress bar ── */
  .csm-read-progress {
    position: sticky;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--amber);
    z-index: 200;
    transition: width 0.08s linear;
    pointer-events: none;
    flex-shrink: 0;
    box-shadow: 0 0 8px rgba(234, 179, 8, 0.35);
  }
  html[data-theme="dark"] .csm-read-progress {
    background: var(--amber-lift);
    box-shadow: 0 0 8px rgba(250, 204, 21, 0.4);
  }
  @media (prefers-reduced-motion: reduce) {
    .csm-read-progress { transition: none; }
  }

  /* ── Sticky nav ── */
  .csm-nav {
    position: sticky; top: 0; z-index: 100;
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 48px; height: 56px;
    background: rgba(250,247,240,0.92);
    backdrop-filter: blur(12px) saturate(1.5);
    -webkit-backdrop-filter: blur(12px) saturate(1.5);
    border-bottom: 0.5px solid var(--border);
    transition: background 0.3s ease;
  }
  html[data-theme="dark"] .csm-nav {
    background: rgba(22,20,16,0.92);
  }
  .csm-back {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: 11px; font-weight: 600; letter-spacing: 0.03em;
    color: var(--subtle); cursor: pointer;
    border: none; background: none; font-family: var(--font-sans);
    padding: 0; transition: color 0.2s ease, gap 0.2s ease;
  }
  .csm-back:hover { color: var(--ink); gap: 10px; }
  .csm-nav-right { display: flex; align-items: center; gap: 16px; }
  .csm-progress { display: flex; align-items: center; gap: 4px; }
  .csm-progress-dot {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--border); transition: background 0.25s, transform 0.25s;
  }
  .csm-progress-dot.active { background: var(--ink); transform: scale(1.3); }

  /* ── Hero image banner ── */
  .csm-hero {
    width: 100%;
    height: clamp(240px, 38vh, 420px);
    overflow: hidden;
    position: relative;
    background: var(--canvas);
  }
  .csm-hero-img {
    position: absolute;
    inset: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    z-index: 1;   /* above the SVG (z-index 0) but below overlay (z-index 2) */
    transition: transform 0.6s var(--ease-out);
  }
  .csm-hero:hover .csm-hero-img { transform: scale(1.025); }
  .csm-hero-overlay {
    position: absolute; inset: 0;
    z-index: 2;
    background: linear-gradient(to bottom, transparent 30%, rgba(15,15,15,0.55) 100%);
    pointer-events: none;
  }
  .csm-hero-badge {
    position: absolute; bottom: 24px; left: 32px;
    z-index: 3;
    display: flex; align-items: center; gap: 10px;
  }
  .csm-hero-roi {
    background: rgba(15,15,15,0.72);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 11px; font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.06em;
    border-radius: 4px;
    padding: 4px 12px;
  }

  /* ── Generative SVG "hero" for cases without an image — sits behind photo ── */
  .csm-hero-svg {
    width: 100%; height: 100%;
    position: absolute; inset: 0;
    z-index: 0;
  }

  /* ── Layout: sidebar + main ── */
  .csm-body-layout {
    display: grid;
    grid-template-columns: 168px 1fr;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 32px;
    gap: 0;
    align-items: start;
  }
  @media (max-width: 960px) {
    .csm-body-layout { grid-template-columns: 1fr; padding: 0 20px; }
    .csm-sidebar { display: none; }
  }

  /* ── Sidebar TOC ── */
  .csm-sidebar {
    position: sticky;
    top: 72px;
    padding-top: 72px;
    padding-right: 32px;
  }
  .csm-toc { display: flex; flex-direction: column; gap: 2px; }
  .csm-toc-link {
    font-size: 10px; font-weight: 600;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--subtle); text-decoration: none;
    font-family: var(--font-mono);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background 0.2s ease, padding-left 0.2s ease;
    display: flex; align-items: center; gap: 7px;
  }
  .csm-toc-link::before {
    content: '';
    display: inline-block;
    width: 12px; height: 0.5px;
    background: currentColor; opacity: 0.35;
    flex-shrink: 0;
    transition: width 0.2s ease, opacity 0.2s ease;
  }
  .csm-toc-link:hover { color: var(--ink); background: var(--ghost); padding-left: 14px; }
  .csm-toc-link:hover::before { width: 16px; opacity: 0.7; }
  .csm-toc-link.active {
    color: var(--ink); font-weight: 700; background: var(--ghost); padding-left: 14px;
  }
  .csm-toc-link.active::before { width: 16px; opacity: 1; background: var(--amber); }

  /* ── Main content column ── */
  .csm-wrap { max-width: 720px; margin: 0; padding: 0; }
  .csm-body-layout .csm-wrap { max-width: 720px; padding: 0; }

  /* ── Header ── */
  .csm-header { padding: 56px 0 44px; border-bottom: 0.5px solid var(--border); }
  .csm-overline { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
  .csm-overline-text {
    font-size: 10px; font-weight: 600; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--subtle); font-family: var(--font-mono);
  }
  .csm-overline-div { width: 1px; height: 12px; background: var(--border); }
  .csm-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 700; color: var(--ink);
    letter-spacing: -0.04em; line-height: 1.05; margin: 0 0 14px;
  }
  .csm-tagline {
    font-size: 16px; color: var(--mid);
    line-height: 1.72; margin: 0;
    font-weight: 400; max-width: 580px;
  }

  /* ── Key metrics strip ── */
  .csm-metrics {
    display: grid; grid-template-columns: repeat(3,1fr);
    border-bottom: 0.5px solid var(--border);
    background: var(--canvas);
  }
  .csm-metric {
    padding: 28px 0;
    border-right: 0.5px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: background 0.2s ease;
  }
  .csm-metric:hover { background: var(--ghost); }
  .csm-metric::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--ink); opacity: 0;
    transition: opacity 0.2s ease;
  }
  .csm-metric:hover::before { opacity: 1; }
  .csm-metric:last-child { border-right: none; padding-left: 28px; }
  .csm-metric:first-child { padding-right: 28px; }
  .csm-metric:nth-child(2) { padding: 28px; }
  .csm-metric-val {
    font-size: clamp(1.7rem, 3vw, 2.2rem);
    font-weight: 700; color: var(--ink);
    letter-spacing: -0.05em; line-height: 1;
    margin-bottom: 6px;
  }
  .csm-metric-lbl {
    font-size: 10px; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--subtle); font-family: var(--font-mono);
  }

  /* ── Sections ── */
  .csm-section {
    padding: 44px 0;
    border-bottom: 0.5px solid var(--border);
  }

  /* ── Collapsible sections ── */
  details.csm-collapsible {
    padding: 0;
    border-bottom: 0.5px solid var(--border);
  }
  details.csm-collapsible summary.csm-coll-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 22px 16px;
    margin: 0 -16px;
    cursor: pointer;
    list-style: none;
    margin-bottom: 0;
    user-select: none;
    border-radius: var(--radius-md);
    border-left: 2.5px solid transparent;
    background: transparent;
    transition: background 0.15s ease, border-color 0.15s ease;
  }
  details.csm-collapsible summary.csm-coll-summary::-webkit-details-marker { display: none; }
  details.csm-collapsible summary.csm-coll-summary::marker { display: none; }
  details.csm-collapsible summary.csm-coll-summary:hover,
  details.csm-collapsible summary.csm-coll-summary:focus-visible {
    background: var(--ghost);
    border-left-color: var(--amber);
  }
  details.csm-collapsible summary.csm-coll-summary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--amber-lift, #FACC15) inset;
  }
  html[data-theme="dark"] details.csm-collapsible summary.csm-coll-summary:hover,
  html[data-theme="dark"] details.csm-collapsible summary.csm-coll-summary:focus-visible {
    background: rgba(240,238,233,0.05);
  }
  details.csm-collapsible summary.csm-coll-summary:hover .csm-coll-chevron,
  details.csm-collapsible summary.csm-coll-summary:focus-visible .csm-coll-chevron {
    color: var(--amber-dark, #92400E);
  }
  html[data-theme="dark"] details.csm-collapsible summary.csm-coll-summary:hover .csm-coll-chevron,
  html[data-theme="dark"] details.csm-collapsible summary.csm-coll-summary:focus-visible .csm-coll-chevron {
    color: var(--amber);
  }
  .csm-coll-summary-main { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 0; }
  .csm-coll-label-text { flex: 1; }
  .csm-coll-preview {
    font-family: var(--font-sans);
    font-size: 0.82rem; font-weight: 400; letter-spacing: normal; text-transform: none;
    color: var(--mid); line-height: 1.5;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  }
  .csm-coll-chevron {
    flex-shrink: 0;
    color: var(--subtle);
    transition: transform 0.22s var(--ease-out), color 0.15s ease;
    margin-left: 10px;
  }
  details.csm-collapsible[open] .csm-coll-chevron {
    transform: rotate(180deg);
  }
  .csm-coll-body {
    padding: 0 16px 40px;
    animation: csm-coll-open 0.22s var(--ease-out) both;
  }
  @keyframes csm-coll-open {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  /* Nested csm-section-label inside a collapsible body (e.g. "What I'd do differently") */
  .csm-coll-body .csm-section-label {
    margin-bottom: 12px;
  }

  /* Featured collapsible — visually distinct from the neutral accordion stack,
     signals "different kind of content" (currently used by the strategy memo) */
  details.csm-collapsible.csm-collapsible-featured {
    background: var(--amber-bg, #FEF9C3);
    border-radius: var(--radius-lg);
    border-bottom: none;
    margin: 8px 0;
    padding: 2px 0;
  }
  html[data-theme="dark"] details.csm-collapsible.csm-collapsible-featured {
    background: rgba(234,179,8,0.06);
  }
  details.csm-collapsible.csm-collapsible-featured summary.csm-coll-summary:hover,
  details.csm-collapsible.csm-collapsible-featured summary.csm-coll-summary:focus-visible {
    background: rgba(234,179,8,0.14);
  }
  html[data-theme="dark"] details.csm-collapsible.csm-collapsible-featured summary.csm-coll-summary:hover,
  html[data-theme="dark"] details.csm-collapsible.csm-collapsible-featured summary.csm-coll-summary:focus-visible {
    background: rgba(234,179,8,0.12);
  }
  details.csm-collapsible.csm-collapsible-featured .csm-coll-body { padding-left: 16px; padding-right: 16px; }

  .csm-section-label {
    display: flex; align-items: center; gap: 10px;
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--subtle); font-family: var(--font-mono);
    margin-bottom: 20px;
  }
  .csm-section-label::before {
    content: '';
    display: inline-block;
    width: 16px; height: 0.5px;
    background: var(--border-mid); flex-shrink: 0;
  }
  .csm-prose {
    font-size: 15px; color: var(--mid);
    line-height: 1.9; margin: 0;
  }

  /* ── Designer's note ── */
  .csm-designer-note {
    border-left: 2px solid var(--blueprint);
    padding-left: 20px;
    margin-bottom: 0;
  }
  .csm-designer-note-label {
    color: var(--blueprint) !important;
  }
  .csm-designer-note-label::before {
    background: var(--blueprint) !important;
    opacity: 0.4;
  }
  .csm-designer-note-prose {
    font-style: italic;
    color: var(--charcoal) !important;
    font-size: 15px;
    line-height: 1.85;
  }

  /* ── Process steps ── */
  .csm-step {
    display: flex; gap: 20px;
    padding: 22px 0;
    border-bottom: 0.5px solid var(--border);
    transition: background 0.2s ease;
  }
  .csm-step:hover { background: var(--ghost); margin: 0 -16px; padding: 22px 16px; }
  .csm-step:last-child { border-bottom: none; }
  .csm-step-num {
    font-size: 10px; font-weight: 700;
    font-family: var(--font-mono); color: var(--subtle);
    letter-spacing: 0.05em; min-width: 28px;
    padding-top: 2px; flex-shrink: 0;
  }
  .csm-step-body { flex: 1; }
  .csm-step-title {
    font-size: 14px; font-weight: 600;
    color: var(--ink); margin-bottom: 6px;
    letter-spacing: -0.015em;
  }
  .csm-step-text { font-size: 13px; color: var(--mid); line-height: 1.78; }

  /* ── Tags ── */
  .csm-tags { display: flex; flex-wrap: wrap; gap: 8px; }

  /* ── CTA block ── */
  .csm-contact {
    padding: 44px 0 64px;
    display: flex; align-items: center;
    justify-content: space-between;
    flex-wrap: wrap; gap: 20px;
    border-top: none;
  }
  .csm-contact-inner {
    background: var(--canvas);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    display: flex; align-items: center;
    justify-content: space-between;
    flex-wrap: wrap; gap: 16px;
    width: 100%;
  }
  .csm-contact-text { font-size: 14px; color: var(--mid); line-height: 1.6; }
  .csm-contact-text strong {
    display: block; font-size: 16px; font-weight: 600;
    color: var(--ink); margin-bottom: 5px; letter-spacing: -0.015em;
  }

  /* ── Adjacent case study navigation ── */
  .csm-adj {
    border-top: 0.5px solid var(--border);
    display: grid; grid-template-columns: 1fr 1fr;
  }
  .csm-adj-card {
    padding: 28px 32px; cursor: pointer;
    transition: background 0.2s ease;
    border: none; background: none;
    font-family: var(--font-sans); text-align: left;
    position: relative; overflow: hidden;
  }
  .csm-adj-card::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 2px; background: var(--ink);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.3s var(--ease-out);
  }
  .csm-adj-card:last-child::after { transform-origin: right; }
  .csm-adj-card:hover::after { transform: scaleX(1); }
  .csm-adj-card:first-child { border-right: 0.5px solid var(--border); }
  .csm-adj-card:last-child { text-align: right; }
  .csm-adj-card:hover { background: var(--ghost); }
  .csm-adj-dir {
    font-size: 9px; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--subtle); font-family: var(--font-mono);
    margin-bottom: 8px; display: block;
  }
  .csm-adj-title {
    font-size: 14px; font-weight: 600;
    color: var(--ink); letter-spacing: -0.015em;
    margin-bottom: 4px; display: block;
  }
  .csm-adj-tag { font-size: 11px; color: var(--subtle); display: block; }

  /* ── Responsive ── */
  @media (max-width: 640px) {
    .csm-nav { padding: 0 20px; }
    .csm-metrics { grid-template-columns: 1fr 1fr; }
    .csm-metric:last-child { grid-column: span 2; border-right: none; border-top: 0.5px solid var(--border); padding: 22px 0 22px; }
    .csm-adj { grid-template-columns: 1fr; }
    .csm-adj-card:first-child { border-right: none; border-bottom: 0.5px solid var(--border); }
    .csm-adj-card:last-child { text-align: left; }
    .csm-title { font-size: 1.85rem; }
    .csm-hero { height: 200px; }
    .csm-hero-badge { left: 20px; bottom: 16px; }
    .csm-contact-inner { padding: 20px; }
    /* Contain any horizontally-scrollable SVG wrappers within the panel */
    .csm-wrap [style*="overflow-x:auto"],
    .csm-wrap [style*="overflow-x: auto"] {
      max-width: calc(100vw - 40px);
    }
  }



/* ═══ Case Study: CEO Quote → Ethics section (was styles.css lines 2105-2533) ═══ */
  /* ─── Case Study: CEO Quote Block ─── */
  /* ── Core equation — compressed insight, sits right after "The challenge" ── */
  .csm-equation {
    margin: 24px 0 0;
    padding: 20px 24px;
    background: var(--amber-bg, #FEF9C3);
    border: 0.5px solid var(--border);
    border-left: 3px solid var(--amber);
    border-radius: var(--radius-md);
  }
  html[data-theme="dark"] .csm-equation {
    background: rgba(234,179,8,0.07);
  }
  .csm-equation-formula {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--amber-dark, #92400E);
    letter-spacing: -0.01em;
    line-height: 1.5;
  }
  html[data-theme="dark"] .csm-equation-formula { color: var(--amber); }
  .csm-equation-explainer {
    margin: 8px 0 0;
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--charcoal);
  }

  .csm-ceo-quote {
    margin: 0;
    padding: 40px 0;
    border-bottom: 0.5px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .csm-ceo-inner {
    background: linear-gradient(135deg, var(--canvas) 0%, var(--ghost) 100%);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    position: relative;
    overflow: hidden;
  }
  .csm-ceo-inner::before {
    content: '\201C';
    position: absolute; top: -12px; left: 20px;
    font-size: 80px; font-weight: 900;
    color: var(--ink); opacity: 0.06;
    font-family: Georgia, serif;
    line-height: 1;
    pointer-events: none;
  }
  html[data-theme="dark"] .csm-ceo-inner {
    background: rgba(240,238,233,0.04);
    border-color: var(--border-mid);
  }
  .csm-ceo-mark {
    color: var(--ink);
    opacity: 0.12;
    flex-shrink: 0;
    display: none;
  }
  .csm-ceo-text {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.6;
    letter-spacing: -0.015em;
    margin: 0 0 20px;
    font-style: italic;
  }
  .csm-ceo-attribution {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .csm-ceo-attr-dot {
    width: 24px; height: 1px;
    background: var(--border-mid); flex-shrink: 0;
  }
  .csm-ceo-author {
    font-size: 12px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-family: var(--font-mono);
  }
  .csm-ceo-context {
    font-size: 11px;
    color: var(--subtle);
    font-family: var(--font-mono);
  }

  /* ─── Case Study: Artifact Placeholders (fallback) ─── */
  .csm-artifacts { display: grid; grid-template-columns: 1fr; gap: 10px; }
  .csm-artifact-placeholder {
    display: flex; align-items: flex-start; gap: 14px; padding: 18px;
    background: var(--canvas); border: 1px dashed var(--border-mid);
    border-radius: var(--radius-lg);
    transition: border-color 0.25s ease, background 0.25s ease;
  }
  html[data-theme="dark"] .csm-artifact-placeholder {
    background: rgba(240,238,233,0.04); border-color: rgba(240,238,233,0.12);
  }
  .csm-artifact-icon {
    width: 36px; height: 36px; border-radius: var(--radius-md);
    background: var(--white); border: 0.5px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--subtle); flex-shrink: 0; box-shadow: var(--shadow-sm);
  }
  .csm-artifact-meta { display: flex; flex-direction: column; gap: 3px; flex: 1; }
  .csm-artifact-type {
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--subtle); font-family: var(--font-mono);
  }
  .csm-artifact-label { font-size: 13px; font-weight: 600; color: var(--ink); line-height: 1.4; }
  .csm-artifact-hint { font-size: 11px; color: var(--mist); font-family: var(--font-mono); line-height: 1.5; }

  /* ─── SVG Artifact Strip ─── */
  .csm-artifact-svg-wrap {
    position: relative;
    width: 100%;
    height: 210px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 0.5px solid var(--border);
    background: var(--canvas);
    cursor: pointer;
    transition: box-shadow 0.22s ease, transform 0.18s ease;
    outline: none;
  }
  .csm-artifact-svg-wrap:hover,
  .csm-artifact-svg-wrap:focus-visible {
    box-shadow: 0 6px 28px rgba(0,0,0,0.11);
    transform: translateY(-2px);
  }
  .csm-artifact-svg-wrap:focus-visible { box-shadow: 0 0 0 3px var(--amber, #E8A020); }
  .csm-artifact-svg-img {
    display: block; width: 100%; height: auto;
    object-fit: cover; object-position: top center;
    pointer-events: none; user-select: none;
  }
  /* Bottom dissolve */
  .csm-artifact-fade {
    position: absolute; inset: 0; pointer-events: none;
    background: linear-gradient(to bottom, transparent 40%, var(--canvas, #F7F6F3) 100%);
  }
  html[data-theme="dark"] .csm-artifact-fade {
    background: linear-gradient(to bottom, transparent 40%, var(--canvas, #16150F) 100%);
  }
  /* Caption + expand bar pinned to bottom */
  .csm-artifact-bar {
    position: absolute; bottom: 0; left: 0; right: 0; z-index: 2;
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 12px 10px;
  }
  .csm-artifact-svg-caption {
    font-size: 10px; font-weight: 600; letter-spacing: 0.06em;
    text-transform: uppercase; color: var(--subtle); font-family: var(--font-mono);
  }
  /* Expand pill — visible on hover */
  .csm-artifact-expand {
    display: flex; align-items: center; gap: 5px;
    padding: 5px 10px 5px 8px;
    background: var(--white, #fff);
    border: 0.5px solid var(--border);
    border-radius: 99px;
    font-size: 10px; font-weight: 600; font-family: var(--font-mono);
    color: var(--ink); cursor: pointer;
    opacity: 0; transform: translateY(4px);
    transition: opacity 0.18s ease, transform 0.18s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.10);
    pointer-events: none;
    white-space: nowrap;
  }
  .csm-artifact-svg-wrap:hover .csm-artifact-expand,
  .csm-artifact-svg-wrap:focus-visible .csm-artifact-expand {
    opacity: 1; transform: translateY(0); pointer-events: auto;
  }
  html[data-theme="dark"] .csm-artifact-expand {
    background: rgba(28,28,22,0.92); color: var(--paper);
    border-color: rgba(240,238,233,0.15);
  }

  /* ─── Artifact Lightbox ─── */
  #artifact-lightbox {
    display: none; position: fixed; inset: 0; z-index: 9999;
    align-items: center; justify-content: center;
  }
  #artifact-lightbox.alb-open { display: flex; }
  .alb-backdrop {
    position: absolute; inset: 0;
    background: rgba(8,8,6,0.80);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    animation: albFadeIn 0.2s ease both;
  }
  .alb-panel {
    position: relative; z-index: 1;
    width: min(94vw, 1120px); max-height: 92vh;
    display: flex; flex-direction: column;
    background: var(--white, #fff);
    border-radius: var(--radius-lg, 16px);
    overflow: hidden;
    box-shadow: 0 32px 100px rgba(0,0,0,0.40);
    animation: albSlideUp 0.26s cubic-bezier(0.22,1,0.36,1) both;
  }
  html[data-theme="dark"] .alb-panel {
    background: #1C1B16;
    border: 0.5px solid rgba(240,238,233,0.1);
  }
  .alb-close {
    position: absolute; top: 12px; right: 12px; z-index: 2;
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--canvas, #F7F6F3);
    border: 0.5px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--ink); cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
  }
  .alb-close:hover { background: var(--ghost); transform: scale(1.08); }
  html[data-theme="dark"] .alb-close {
    background: rgba(240,238,233,0.08); color: var(--paper);
  }
  .alb-img-wrap {
    flex: 1; overflow: auto; padding: 20px;
    /* custom scrollbar */
    scrollbar-width: thin; scrollbar-color: var(--border) transparent;
  }
  .alb-img { display: block; width: 100%; height: auto; border-radius: var(--radius-md, 10px); }
  .alb-caption {
    padding: 10px 20px 14px;
    font-size: 10px; font-weight: 600; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--subtle); font-family: var(--font-mono);
    border-top: 0.5px solid var(--border);
  }
  @keyframes albFadeIn  { from { opacity: 0; } to { opacity: 1; } }
  @keyframes albSlideUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }

  /* ─── Case Study: What We Got Wrong ─── */
  .csm-label-wrong {
    color: var(--amber) !important;
    border-color: rgba(184,114,20,0.2) !important;
  }
  html[data-theme="dark"] .csm-label-wrong { color: var(--amber) !important; }

  /* ─── Case Study: Share Button ─── */
  .csm-share-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    color: var(--subtle);
    background: transparent;
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px 10px;
    cursor: pointer;
    font-family: var(--font-sans);
    letter-spacing: 0.03em;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  }
  .csm-share-btn:hover { color: var(--ink); background: var(--ghost); border-color: var(--border-mid); }

  /* NOTE: .csm-body-layout, .csm-sidebar, .csm-toc, .csm-toc-link are defined
     once, earlier in this file (Layout: sidebar + main / Sidebar TOC). A
     duplicate, conflicting definition of all four selectors previously lived
     here — different column width (160px vs 168px), different breakpoint
     (900px vs 960px), and a plain `display: block` .csm-toc-link that was
     silently overriding the earlier flex layout the tick-mark/active-state
     styling depends on. Removed rather than fixed in place, since keeping
     two definitions of the same components is itself the bug. */

  /* ─── Override csm-wrap inside layout ─── */
  .csm-body-layout .csm-wrap { max-width: 720px; padding: 0; }

  /* ─── Case Study: Meta bar ─── */
  .csm-meta-bar {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr;
    gap: 0;
    border: 0.5px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--white);
    margin-top: 4px;
    box-shadow: var(--shadow-sm);
  }
  .csm-meta-item {
    padding: 20px 22px;
    border-right: 0.5px solid var(--border);
    transition: background 0.2s ease;
  }
  .csm-meta-item:hover { background: var(--ghost); }
  .csm-meta-item:last-child { border-right: none; }
  .csm-meta-label {
    font-size: 9px; font-weight: 700;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--subtle); font-family: var(--font-mono);
    margin-bottom: 6px;
  }
  .csm-meta-value { font-size: 12px; color: var(--ink); line-height: 1.5; font-weight: 500; }
  @media (max-width: 640px) {
    .csm-meta-bar { grid-template-columns: 1fr 1fr; }
    .csm-meta-wide { grid-column: span 2; border-right: none; border-top: 0.5px solid var(--border); }
  }
  html[data-theme="dark"] .csm-meta-bar { background: rgba(240,238,233,0.04); }
  html[data-theme="dark"] .csm-coll-chevron { color: var(--mid); }

  /* ─── Case Study: Research Insights Grid ─── */
  .csm-insights-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  @media (max-width: 640px) { .csm-insights-grid { grid-template-columns: 1fr; } }
  .csm-insight-card {
    background: var(--canvas);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
  }
  .csm-insight-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 1.5px;
    background: linear-gradient(90deg, var(--blueprint), transparent);
    opacity: 0; transition: opacity 0.25s ease;
  }
  .csm-insight-card:hover {
    border-color: var(--border-mid);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  .csm-insight-card:hover::before { opacity: 1; }
  html[data-theme="dark"] .csm-insight-card { background: rgba(240,238,233,0.04); }
  .csm-insight-label {
    font-size: 9px; font-weight: 700;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--blueprint); font-family: var(--font-mono);
    margin-bottom: 8px;
  }
  .csm-insight-body { font-size: 12px; color: var(--charcoal); line-height: 1.7; }

  /* ─── Case Study: Decision Points ─── */
  .csm-decisions { display: flex; flex-direction: column; gap: 12px; }
  .csm-decision {
    border: 0.5px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    transition: box-shadow 0.2s ease;
  }
  .csm-decision:hover { box-shadow: var(--shadow-md); }
  .csm-decision-header {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 18px;
    background: var(--canvas);
    border-bottom: 0.5px solid var(--border);
  }
  .csm-decision-num {
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--ink); color: var(--white);
    font-size: 10px; font-weight: 700; font-family: var(--font-mono);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  }
  .csm-decision-title { font-size: 13px; font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
  .csm-decision-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
  .csm-decision-why, .csm-decision-tradeoff { font-size: 12.5px; color: var(--mid); line-height: 1.72; }
  .csm-decision-tag {
    display: inline-block;
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    font-family: var(--font-mono); color: var(--teal); background: var(--teal-bg);
    border-radius: var(--radius-xs); padding: 2px 6px; margin-right: 8px; vertical-align: middle;
  }
  .csm-decision-tag-tradeoff { color: var(--amber); background: var(--amber-bg); }
  html[data-theme="dark"] .csm-decision { background: rgba(240,238,233,0.03); }
  html[data-theme="dark"] .csm-decision-header { background: rgba(240,238,233,0.04); }

  /* ─── Strategy memo — PM-reasoning lens, collapsed by default ───────────── */
  .csm-sm-summary-tag {
    display: inline-block; font-size: 8.5px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; font-family: var(--font-mono); color: var(--amber-dark, #92400E);
    background: var(--amber-bg); border-radius: var(--radius-xs); padding: 2px 6px;
    margin-right: 8px; vertical-align: middle;
  }
  html[data-theme="dark"] .csm-sm-summary-tag { color: var(--amber); background: rgba(234,179,8,0.12); }

  .csm-strategy-memo { display: flex; flex-direction: column; gap: 22px; }
  .csm-sm-block { display: flex; flex-direction: column; gap: 8px; }
  .csm-sm-label {
    font-family: var(--font-mono); font-size: 10px; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase; color: var(--subtle);
  }
  .csm-sm-list { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 8px; }
  .csm-sm-list li { font-size: 0.9rem; line-height: 1.6; color: var(--charcoal); }

  .csm-sm-levers { display: flex; flex-direction: column; gap: 12px; }
  .csm-sm-lever {
    padding: 12px 14px; background: var(--canvas); border: 0.5px solid var(--border);
    border-left: 2.5px solid var(--amber); border-radius: var(--radius-sm);
  }
  html[data-theme="dark"] .csm-sm-lever { background: rgba(240,238,233,0.03); }
  .csm-sm-lever-name { font-size: 0.88rem; font-weight: 700; color: var(--ink); margin-bottom: 4px; }
  .csm-sm-lever-desc { font-size: 0.85rem; line-height: 1.55; color: var(--charcoal); }

  .csm-sm-ptable { border: 0.5px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
  .csm-sm-prow {
    display: grid; grid-template-columns: 2.2fr 0.8fr 0.8fr 1fr;
    gap: 8px; padding: 10px 14px; border-bottom: 0.5px solid var(--border);
    align-items: center;
  }
  .csm-sm-prow:last-child { border-bottom: none; }
  .csm-sm-prow-head {
    background: var(--ghost); font-family: var(--font-mono); font-size: 9px;
    font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--subtle);
  }
  html[data-theme="dark"] .csm-sm-prow-head { background: rgba(240,238,233,0.04); }
  .csm-sm-pcell { font-size: 0.83rem; color: var(--charcoal); }
  .csm-sm-pcell-lever { color: var(--ink); font-weight: 600; }
  .csm-sm-pcell-priority { font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: var(--amber-dark, #92400E); }
  html[data-theme="dark"] .csm-sm-pcell-priority { color: var(--amber); }

  .csm-sm-northstar {
    display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
    font-size: 0.92rem; font-weight: 600; color: var(--ink); margin-bottom: 4px;
  }
  .csm-sm-northstar-tag {
    font-family: var(--font-mono); font-size: 8.5px; font-weight: 700; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--true-white); background: var(--steel);
    border-radius: var(--radius-xs); padding: 3px 7px; flex-shrink: 0;
  }

  .csm-sm-block-guardrails { padding: 14px 16px; background: var(--amber-bg, #FEF9C3); border-radius: var(--radius-md); }
  html[data-theme="dark"] .csm-sm-block-guardrails { background: rgba(234,179,8,0.07); }
  .csm-sm-block-guardrails .csm-sm-label { color: var(--amber-dark, #92400E); }
  html[data-theme="dark"] .csm-sm-block-guardrails .csm-sm-label { color: var(--amber); }
  .csm-sm-guardrail-list li { color: var(--charcoal); }

  @media (max-width: 640px) {
    .csm-sm-prow { grid-template-columns: 1.6fr 0.7fr 0.7fr 0.9fr; gap: 4px; padding: 10px; }
    .csm-sm-pcell { font-size: 0.75rem; }
  }

  /* ─── Case Study: Outcomes highlight ─── */
  .csm-section-outcomes {
    background: linear-gradient(135deg, var(--teal-bg) 0%, rgba(234,179,8,0.06) 100%);
    border-radius: var(--radius-xl);
    padding: 32px !important;
    border: 0.5px solid rgba(234,179,8,0.2) !important;
    border-bottom: 0.5px solid rgba(234,179,8,0.2) !important;
    margin-bottom: 1px;
    position: relative; overflow: hidden;
  }
  .csm-section-outcomes::after {
    content: '';
    position: absolute; top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--teal);
    border-radius: 2px 0 0 2px;
  }
  .csm-section-outcomes .csm-section-label { color: var(--teal) !important; }
  .csm-section-outcomes .csm-prose { color: var(--charcoal) !important; font-size: 14.5px !important; }

  /* ─── Case Study: Lessons highlight ─── */
  .csm-section-lessons {
    border-left: 3px solid var(--ink);
    padding-left: 24px;
    background: none;
  }

  /* ─── Case Study: Ethics section ─── */
  .csm-section-ethics {
    background: linear-gradient(135deg, var(--blueprint-bg) 0%, rgba(21,88,160,0.05) 100%);
    border-radius: var(--radius-xl);
    padding: 28px 32px !important;
    border: 0.5px solid rgba(21,88,160,0.18) !important;
    border-bottom: 0.5px solid rgba(21,88,160,0.18) !important;
    position: relative; overflow: hidden;
  }
  .csm-section-ethics::after {
    content: '';
    position: absolute; top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--blueprint);
    border-radius: 2px 0 0 2px;
  }
  .csm-section-ethics .csm-section-label { color: var(--blueprint) !important; }
  .csm-section-ethics .csm-prose { color: var(--charcoal) !important; }


/* ═══ Presentation Mode (Big Four Portfolio Walkthrough) + Slide Components (was styles.css lines 2534-3184) ═══ */
  /* ═══════════════════════════════════════════════════════════════════════
     PRESENTATION MODE — Big Four Portfolio Walkthrough
     Light/dark switchable · 3 slides per case · Sidebar nav dots
     ═══════════════════════════════════════════════════════════════════════ */

  /* ── CSS custom properties per theme ── */
  .pm-overlay {
    /* dark defaults */
    --pm-bg:           #0D0D0D;
    --pm-surface:      #161616;
    --pm-surface2:     #1E1E1E;
    --pm-border:       rgba(255,255,255,0.07);
    --pm-border-mid:   rgba(255,255,255,0.12);
    --pm-ink:          #F2F0EB;
    --pm-mid:          rgba(242,240,235,0.55);
    --pm-mist:         rgba(242,240,235,0.30);
    --pm-ghost:        rgba(242,240,235,0.06);
    --pm-accent:       #EAB308;
    --pm-accent-bg:    rgba(234,179,8,0.10);
    --pm-accent-border:rgba(234,179,8,0.22);
    --pm-kpi-val:      #FFFFFF;
    --pm-badge-bg:     rgba(255,255,255,0.06);
    --pm-badge-border: rgba(255,255,255,0.10);
    --pm-progress-bg:  rgba(255,255,255,0.08);
    --pm-progress-bar: #EAB308;
    --pm-btn-bg:       rgba(255,255,255,0.05);
    --pm-btn-border:   rgba(255,255,255,0.12);
    --pm-btn-hover-bg: rgba(255,255,255,0.10);
    --pm-dot-default:  rgba(255,255,255,0.15);
    --pm-dot-past:     rgba(255,255,255,0.40);
    --pm-dot-active:   #EAB308;
    --pm-sidebar-bg:   rgba(255,255,255,0.03);
    --pm-sidebar-bdr:  rgba(255,255,255,0.06);
    --pm-reflection-bg:rgba(234,179,8,0.07);
    --pm-reflection-bdr:rgba(234,179,8,0.18);
    --pm-challenge-bg: rgba(255,255,255,0.04);
    --pm-challenge-bdr:rgba(255,255,255,0.08);
    --pm-process-n:    rgba(255,255,255,0.12);
    --pm-outcome-bdr:  rgba(255,255,255,0.07);
    --pm-quote-bdr:    rgba(255,255,255,0.18);
    --pm-quote-icon:   rgba(255,255,255,0.15);
    --pm-pillar-bg:    rgba(255,255,255,0.04);
    --pm-pillar-bdr:   rgba(255,255,255,0.08);
    --pm-cta-card-bg:  rgba(255,255,255,0.04);
    --pm-cta-card-bdr: rgba(255,255,255,0.08);
  }
  /* ── Light theme overrides ── */
  .pm-overlay[data-pm-theme="light"] {
    --pm-bg:           #F5F3EE;
    --pm-surface:      #FFFFFF;
    --pm-surface2:     #F0EDE6;
    --pm-border:       rgba(0,0,0,0.07);
    --pm-border-mid:   rgba(0,0,0,0.12);
    --pm-ink:          #1F2937;
    --pm-mid:          rgba(31,41,55,0.60);
    --pm-mist:         rgba(31,41,55,0.35);
    --pm-ghost:        rgba(0,0,0,0.03);
    --pm-accent:       #B45309;
    --pm-accent-bg:    rgba(180,83,9,0.08);
    --pm-accent-border:rgba(180,83,9,0.20);
    --pm-kpi-val:      #0F172A;
    --pm-badge-bg:     rgba(0,0,0,0.04);
    --pm-badge-border: rgba(0,0,0,0.09);
    --pm-progress-bg:  rgba(0,0,0,0.08);
    --pm-progress-bar: #B45309;
    --pm-btn-bg:       rgba(0,0,0,0.04);
    --pm-btn-border:   rgba(0,0,0,0.12);
    --pm-btn-hover-bg: rgba(0,0,0,0.08);
    --pm-dot-default:  rgba(0,0,0,0.15);
    --pm-dot-past:     rgba(0,0,0,0.35);
    --pm-dot-active:   #B45309;
    --pm-sidebar-bg:   rgba(0,0,0,0.025);
    --pm-sidebar-bdr:  rgba(0,0,0,0.07);
    --pm-reflection-bg:rgba(180,83,9,0.06);
    --pm-reflection-bdr:rgba(180,83,9,0.16);
    --pm-challenge-bg: rgba(0,0,0,0.03);
    --pm-challenge-bdr:rgba(0,0,0,0.07);
    --pm-process-n:    rgba(0,0,0,0.10);
    --pm-outcome-bdr:  rgba(0,0,0,0.06);
    --pm-quote-bdr:    rgba(0,0,0,0.15);
    --pm-quote-icon:   rgba(0,0,0,0.12);
    --pm-pillar-bg:    rgba(0,0,0,0.03);
    --pm-pillar-bdr:   rgba(0,0,0,0.07);
    --pm-cta-card-bg:  #FFFFFF;
    --pm-cta-card-bdr: rgba(0,0,0,0.08);
  }

  /* ── Overlay shell ── */
  .pm-overlay {
    position: fixed;
    inset: 0;
    z-index: 2147483647;
    background: var(--pm-bg);
    display: flex;
    flex-direction: column;
    font-family: var(--font-sans);
    color: var(--pm-ink);
    transition: background 0.25s ease, color 0.25s ease;
  }

  /* ── Top bar ── */
  .pm-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    height: 50px;
    border-bottom: 0.5px solid var(--pm-border);
    flex-shrink: 0;
    gap: 16px;
  }
  .pm-bar-left  { display: flex; align-items: center; gap: 12px; }
  .pm-bar-right { display: flex; align-items: center; gap: 12px; }
  .pm-logo-mark {
    width: 22px; height: 22px;
    background: var(--pm-accent);
    border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
  }
  .pm-logo-mark img { width: 13px; height: 13px; object-fit: contain; display: block; }
  .pm-bar-name {
    font-size: 11px; font-weight: 700; letter-spacing: 0.09em;
    color: var(--pm-ink); opacity: 0.6;
  }
  .pm-section-label {
    font-size: 10px; color: var(--pm-mist);
    font-family: var(--font-mono); letter-spacing: 0.04em;
    margin-top: 1px;
  }
  .pm-counter {
    font-size: 11px; color: var(--pm-mist);
    font-family: var(--font-mono);
  }
  /* Light/dark toggle button */
  .pm-theme-btn {
    width: 30px; height: 30px;
    background: var(--pm-btn-bg);
    border: 0.5px solid var(--pm-btn-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: var(--pm-mist);
    transition: background 0.2s ease, color 0.2s ease;
  }
  .pm-theme-btn:hover { background: var(--pm-btn-hover-bg); color: var(--pm-ink); }
  .pm-overlay[data-pm-theme="dark"]  .pm-icon-moon { display: none; }
  .pm-overlay[data-pm-theme="light"] .pm-icon-sun  { display: none; }
  .pm-close-btn {
    width: 30px; height: 30px;
    background: var(--pm-btn-bg);
    border: 0.5px solid var(--pm-btn-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: var(--pm-mist);
    transition: background 0.2s ease, color 0.2s ease;
  }
  .pm-close-btn:hover { background: rgba(220,38,38,0.12); border-color: rgba(220,38,38,0.2); color: #EF4444; }

  /* ── Progress bar ── */
  .pm-progress-track {
    height: 2px;
    background: var(--pm-progress-bg);
    flex-shrink: 0;
  }
  .pm-progress-bar {
    height: 100%;
    background: var(--pm-progress-bar);
    transition: width 0.4s cubic-bezier(0.22,1,0.36,1), background 0.25s ease;
    border-radius: 0 2px 2px 0;
  }

  /* ── Body: sidebar + content ── */
  .pm-body {
    flex: 1;
    display: flex;
    overflow: hidden;
  }

  /* ── Sidebar ── */
  .pm-sidebar {
    width: 64px;
    flex-shrink: 0;
    background: var(--pm-sidebar-bg);
    border-right: 0.5px solid var(--pm-sidebar-bdr);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 0 20px;
    gap: 20px;
    transition: background 0.25s ease;
  }
  .pm-dots {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex: 1;
  }
  /* Scoped under .pm-sidebar — this "pm-dot" is the modal's sidebar
     progress-navigation dot and is unrelated to the Engagement Scope
     table's phase-status dots (which also use "pm-dot", coincidentally
     both prefixes short for different things — "project modal" here vs
     "portfolio matrix" there). Un-scoped, this rule was overriding the
     table's dots site-wide since this stylesheet loads after styles.css,
     shrinking them from 22px colored circles down to 6px near-invisible
     ones. Scoping fixes the collision without touching any HTML/JS —
     case-study.js already only ever creates/queries these dots inside
     .pm-sidebar. */
  .pm-sidebar .pm-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--pm-dot-default);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: background 0.2s ease, transform 0.2s ease, width 0.2s ease;
    flex-shrink: 0;
  }
  .pm-sidebar .pm-dot:hover   { background: var(--pm-dot-past); transform: scale(1.4); }
  .pm-sidebar .pm-dot-past    { background: var(--pm-dot-past) !important; }
  .pm-sidebar .pm-dot-active  {
    background: var(--pm-dot-active) !important;
    width: 6px; height: 14px;
    border-radius: 3px;
    transform: none;
  }
  .pm-sidebar-hint {
    font-size: 8px;
    color: var(--pm-mist);
    font-family: var(--font-mono);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    letter-spacing: 0.06em;
    opacity: 0.5;
    line-height: 1.4;
  }

  /* ── Slide content area ── */
  .pm-content {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 52px;
    overflow-y: auto;
    overflow-x: hidden;
  }
  @media (max-width: 700px) {
    .pm-content { padding: 24px 20px; }
    .pm-sidebar { width: 36px; }
    .pm-bar { padding: 0 16px; }
    .pm-controls { padding: 12px 16px; }
  }

  /* ── Bottom controls ── */
  .pm-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 32px;
    border-top: 0.5px solid var(--pm-border);
    flex-shrink: 0;
    gap: 16px;
  }
  .pm-controls-hint {
    font-size: 10px;
    color: var(--pm-mist);
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
  }
  .pm-prev, .pm-next {
    font-size: 12px;
    font-weight: 600;
    color: var(--pm-mid);
    background: var(--pm-btn-bg);
    border: 0.5px solid var(--pm-btn-border);
    border-radius: var(--radius-sm);
    padding: 8px 18px;
    cursor: pointer;
    font-family: var(--font-sans);
    letter-spacing: 0.03em;
    display: flex; align-items: center; gap: 6px;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  }
  .pm-prev:hover, .pm-next:hover {
    color: var(--pm-ink);
    border-color: var(--pm-border-mid);
    background: var(--pm-btn-hover-bg);
  }
  .pm-prev:disabled { pointer-events: none; }

  /* ══════════════════════════════
     SLIDE COMPONENTS
  ══════════════════════════════ */
  .pm-slide {
    max-width: 820px;
    width: 100%;
  }

  /* ── Intro slide ── */
  .pm-intro { text-align: center; padding-top: 16px; }
  .pm-intro-eyebrow {
    display: inline-block;
    font-size: 10px; font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--pm-accent);
    background: var(--pm-accent-bg);
    border: 0.5px solid var(--pm-accent-border);
    border-radius: 99px;
    padding: 4px 14px;
    margin-bottom: 24px;
    font-family: var(--font-mono);
  }
  .pm-intro-name {
    font-size: clamp(2.4rem, 5.5vw, 4.2rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.95;
    color: var(--pm-ink);
    margin: 0 0 10px;
  }
  .pm-intro-role {
    font-size: 14px;
    color: var(--pm-mist);
    margin: 0 0 36px;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
  }
  .pm-intro-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 32px;
    flex-wrap: wrap;
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-lg);
    background: var(--pm-ghost);
    padding: 20px 0;
  }
  .pm-stat { padding: 0 28px; text-align: center; }
  .pm-stat-div { width: 0.5px; height: 36px; background: var(--pm-border); }
  .pm-stat-val {
    font-size: 1.9rem; font-weight: 700; color: var(--pm-kpi-val);
    letter-spacing: -0.04em; line-height: 1; margin-bottom: 4px;
  }
  .pm-stat-lbl {
    font-size: 9px; color: var(--pm-mist);
    font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase;
  }
  .pm-intro-divider {
    height: 0.5px; background: var(--pm-border); margin: 28px 0;
  }
  .pm-intro-pillars {
    display: flex; gap: 12px; justify-content: center; margin-bottom: 28px; flex-wrap: wrap;
  }
  .pm-pillar {
    background: var(--pm-pillar-bg);
    border: 0.5px solid var(--pm-pillar-bdr);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    text-align: center;
    flex: 1; min-width: 120px;
  }
  .pm-pillar-icon {
    font-size: 18px; color: var(--pm-accent);
    margin-bottom: 8px; line-height: 1;
  }
  .pm-pillar-label {
    font-size: 11px; font-weight: 600; color: var(--pm-mid);
    line-height: 1.4; letter-spacing: 0.01em;
  }
  .pm-intro-belief {
    font-size: 14px;
    color: var(--pm-mid);
    line-height: 1.75;
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    padding: 20px;
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--pm-accent);
  }

  /* ── Case slide common ── */
  .pm-case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .pm-case-meta {
    display: flex; align-items: center; gap: 10px;
  }
  .pm-case-num {
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--pm-mist);
    font-family: var(--font-mono);
  }
  .pm-chip-label {
    font-size: 9px; font-weight: 700; letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--pm-accent-bg);
    color: var(--pm-accent);
    border: 0.5px solid var(--pm-accent-border);
    border-radius: 99px;
    padding: 2px 10px;
    font-family: var(--font-mono);
  }
  .pm-case-roi-badge {
    font-size: 11px; font-weight: 700;
    color: var(--pm-accent);
    background: var(--pm-accent-bg);
    border: 0.5px solid var(--pm-accent-border);
    border-radius: var(--radius-sm);
    padding: 4px 10px;
    font-family: var(--font-mono);
    letter-spacing: 0.03em;
  }
  .pm-case-title {
    font-size: clamp(1.5rem, 3.2vw, 2.2rem);
    font-weight: 700; letter-spacing: -0.035em;
    line-height: 1.1; color: var(--pm-ink);
    margin: 0 0 8px;
  }
  .pm-case-title-sm {
    font-size: clamp(1.1rem, 2.2vw, 1.45rem);
    margin-bottom: 18px;
  }
  .pm-case-tagline {
    font-size: 14px; color: var(--pm-mid);
    line-height: 1.65; margin: 0 0 22px;
  }

  /* KPI row */
  .pm-kpi-row {
    display: flex; gap: 0;
    margin-bottom: 22px;
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-md);
    overflow: hidden;
  }
  .pm-kpi {
    flex: 1;
    padding: 14px 16px;
    border-right: 0.5px solid var(--pm-border);
  }
  .pm-kpi:last-child { border-right: none; }
  .pm-kpi-val {
    font-size: 1.4rem; font-weight: 700;
    color: var(--pm-kpi-val); letter-spacing: -0.03em;
    line-height: 1; margin-bottom: 3px;
  }
  .pm-kpi-lbl {
    font-size: 9px; color: var(--pm-mist);
    font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase;
  }

  /* Context / challenge grid */
  .pm-section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  @media (max-width: 700px) { .pm-section-grid { grid-template-columns: 1fr; } }
  .pm-context-block {
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-md);
    padding: 16px 18px;
  }
  .pm-challenge-block {
    background: var(--pm-challenge-bg);
    border-color: var(--pm-challenge-bdr);
    border-left: 3px solid var(--pm-accent);
  }
  .pm-block-label {
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--pm-mist);
    font-family: var(--font-mono); margin-bottom: 8px;
  }
  .pm-challenge-label { color: var(--pm-accent) !important; }
  .pm-block-body {
    font-size: 12.5px; color: var(--pm-mid);
    line-height: 1.7; margin: 0;
  }

  /* Approach slide: process steps */
  .pm-approach-label, .pm-outcomes-label {
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--pm-accent);
    font-family: var(--font-mono);
  }
  .pm-process-list {
    display: flex; flex-direction: column; gap: 10px;
    margin-bottom: 18px;
  }
  .pm-process-step {
    display: flex; gap: 14px; align-items: flex-start;
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    transition: border-color 0.2s ease;
  }
  .pm-process-step:hover { border-color: var(--pm-border-mid); }
  .pm-process-n {
    font-size: 9px; font-weight: 700;
    color: var(--pm-accent);
    background: var(--pm-accent-bg);
    border: 0.5px solid var(--pm-accent-border);
    border-radius: var(--radius-xs);
    padding: 2px 6px;
    font-family: var(--font-mono);
    flex-shrink: 0;
    margin-top: 1px;
  }
  .pm-process-body { flex: 1; }
  .pm-process-title {
    font-size: 12px; font-weight: 700;
    color: var(--pm-ink); margin-bottom: 3px;
    letter-spacing: -0.01em;
  }
  .pm-process-desc {
    font-size: 11.5px; color: var(--pm-mid); line-height: 1.6;
  }
  .pm-constraints-row { margin-top: 4px; }
  .pm-constraints { display: flex; flex-wrap: wrap; gap: 8px; }
  .pm-constraint {
    display: flex; align-items: center; gap: 6px;
    background: var(--pm-badge-bg);
    border: 0.5px solid var(--pm-badge-border);
    border-radius: 99px;
    padding: 4px 10px;
    font-size: 11px; color: var(--pm-mid);
  }
  .pm-constraint-icon { font-size: 12px; }
  .pm-constraint-lbl { font-size: 10px; font-weight: 600; }

  /* Outcome slide */
  .pm-outcomes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 18px;
  }
  .pm-outcome {
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-outcome-bdr);
    border-radius: var(--radius-md);
    padding: 14px 16px;
  }
  .pm-outcome-metric {
    font-size: 1.5rem; font-weight: 700;
    color: var(--pm-kpi-val); letter-spacing: -0.04em;
    line-height: 1; margin-bottom: 3px;
  }
  .pm-outcome-label {
    font-size: 10px; font-weight: 700;
    color: var(--pm-mid); margin-bottom: 4px;
  }
  .pm-outcome-context {
    font-size: 10px; color: var(--pm-mist);
    line-height: 1.5; font-family: var(--font-mono);
  }
  .pm-outcome-bottom-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 10px;
  }
  @media (max-width: 700px) { .pm-outcome-bottom-grid { grid-template-columns: 1fr; } }
  .pm-stakeholder, .pm-reflection {
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
  }
  .pm-reflection {
    background: var(--pm-reflection-bg);
    border-color: var(--pm-reflection-bdr);
    border-left: 3px solid var(--pm-accent);
  }
  .pm-reflection-label { color: var(--pm-accent) !important; }

  /* Quote */
  .pm-quote {
    display: flex; gap: 14px; align-items: flex-start;
    border: 0.5px solid var(--pm-quote-bdr);
    background: var(--pm-ghost);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    margin-bottom: 14px;
  }
  .pm-quote-mark { color: var(--pm-quote-icon); flex-shrink: 0; margin-top: 2px; }
  .pm-quote-text {
    font-size: 13px; font-weight: 500; color: var(--pm-ink);
    line-height: 1.6; letter-spacing: -0.01em;
    font-style: italic; margin-bottom: 8px;
  }
  .pm-quote-attr {
    font-size: 10px; color: var(--pm-mist);
    font-family: var(--font-mono);
  }

  /* CTA slide */
  .pm-cta { text-align: center; padding-top: 16px; }
  .pm-cta-eyebrow {
    font-size: 10px; font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--pm-accent);
    font-family: var(--font-mono); margin-bottom: 16px;
  }
  .pm-cta-title {
    font-size: clamp(1.7rem, 3.8vw, 2.8rem);
    font-weight: 700; letter-spacing: -0.04em;
    line-height: 1.05; color: var(--pm-ink);
    margin: 0 0 14px;
  }
  .pm-cta-sub {
    font-size: 13px; color: var(--pm-mist); margin: 0 0 32px; line-height: 1.6;
  }
  .pm-cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
    margin-bottom: 28px;
    text-align: left;
  }
  .pm-cta-card {
    background: var(--pm-cta-card-bg);
    border: 0.5px solid var(--pm-cta-card-bdr);
    border-radius: var(--radius-md);
    padding: 14px 16px;
  }
  .pm-cta-card-label {
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--pm-mist);
    font-family: var(--font-mono); margin-bottom: 4px;
  }
  .pm-cta-card-val {
    font-size: 12px; font-weight: 600; color: var(--pm-ink);
    word-break: break-all;
  }
  .pm-cta-avail {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; color: var(--pm-mist);
    background: var(--pm-ghost);
    border: 0.5px solid var(--pm-border);
    border-radius: 99px;
    padding: 6px 16px;
  }


/* ═══ Constraints grid (was styles.css lines 3188-3228) ═══ */
/* ─── Constraints grid ───────────────────────────────────────────────────────── */
.csm-constraints-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.csm-constraint-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--ghost, #F7F6F3);
  border: 0.5px solid var(--border, rgba(15,15,15,0.1));
  border-radius: 10px;
  padding: 16px 18px;
}
.csm-constraint-icon {
  font-size: 22px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}
.csm-constraint-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink, #0F0F0F);
  font-family: var(--font-mono, monospace);
  margin-bottom: 5px;
}
.csm-constraint-detail {
  font-size: 13px;
  color: var(--muted, #6B6B68);
  line-height: 1.65;
}
html[data-theme="dark"] .csm-constraint-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}


/* ═══ Outcomes grid (was styles.css lines 3229-3275) ═══ */
/* ─── Outcomes grid ──────────────────────────────────────────────────────────── */
.csm-outcomes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.csm-outcome-card {
  background: var(--ghost, #F7F6F3);
  border: 0.5px solid var(--border, rgba(15,15,15,0.1));
  border-radius: 10px;
  padding: 20px 18px;
}
.csm-outcome-metric {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink, #0F0F0F);
  line-height: 1;
  margin-bottom: 6px;
  font-family: var(--font-mono, monospace);
}
.csm-outcome-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink, #0F0F0F);
  margin-bottom: 8px;
}
.csm-outcome-context {
  font-size: 12px;
  color: var(--muted, #6B6B68);
  line-height: 1.6;
}
html[data-theme="dark"] .csm-outcome-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}
html[data-theme="dark"] .csm-outcome-metric {
  color: #F0EEE9;
}
html[data-theme="dark"] .csm-outcome-label {
  color: rgba(240,238,233,0.7);
}




/* ═══ Additional case-study rules recovered from later "patch" sections of the original styles.css (kept in original relative order for correct cascade) ═══ */

/* ═══ Case study artifact link cards (rendered by openCase() overlay) (was styles.css lines 1946-1987) ═══ */
/* ── Case study artifact link cards ─────────────────────────────────────────
   Rendered by the openCase() overlay for deepLinkUrl / demoUrl / povUrl /
   aiPaperUrl fields. Each is a full-width link row with an icon on the right.
   ─────────────────────────────────────────────────────────────────────────── */
.csm-artifact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-radius: var(--radius-lg, 12px);
  text-decoration: none;
  transition: opacity 0.18s ease, border-color 0.18s ease;
  cursor: pointer;
}

.csm-artifact-link-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.csm-artifact-link-eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-family: var(--font-mono, monospace);
}

.csm-artifact-link-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.csm-artifact-link-sub {
  font-size: 11px;
  line-height: 1.5;
}

/* ═══ Site Visit Photo Gallery + Field Proof Strip (case study overlay photo galleries) (was styles.css lines 2453-2752) ═══ */
/* ═══════════════════════════════════════════════════════════════════════
   SITE VISIT PHOTO GALLERY — Case Study Overlay
   Used by buildSiteVisitGallery() in main.js
   ─────────────────────────────────────────────────────────────────────
   Layout: grouped sections with a 3-column responsive masonry-style grid.
   Each thumbnail expands in the shared artifact lightbox on click / Enter.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Group container ──────────────────────────────────────────────────── */
.csm-photo-group {
  margin-bottom: 28px;
}
.csm-photo-group:last-child {
  margin-bottom: 0;
}
.csm-photo-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--subtle);
  font-family: var(--font-mono);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 0.5px solid var(--border);
}

/* ── Photo grid — 3 columns, wraps to 2 on tablet, 1 on mobile ──────── */
.csm-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 900px) {
  .csm-photo-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .csm-photo-grid { grid-template-columns: 1fr; }
}

/* ── Single thumbnail card ────────────────────────────────────────────── */
.csm-photo-thumb {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  border-radius: var(--radius-md);
  outline: none;
}
.csm-photo-thumb:focus-visible .csm-photo-thumb-img-wrap {
  box-shadow: 0 0 0 2px var(--amber), 0 0 0 4px var(--amber-bg);
}

/* ── Image container with hover overlay ──────────────────────────────── */
.csm-photo-thumb-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--ghost);
  border: 0.5px solid var(--border);
  transition: border-color 0.2s ease;
}
.csm-photo-thumb:hover .csm-photo-thumb-img-wrap {
  border-color: var(--amber);
}

.csm-photo-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.csm-photo-thumb:hover .csm-photo-thumb-img {
  transform: scale(1.04);
}

/* Missing image state */
.csm-photo-thumb-img-wrap.csm-photo-missing {
  display: flex;
  align-items: center;
  justify-content: center;
}
.csm-photo-thumb-img-wrap.csm-photo-missing::after {
  content: 'Image not found';
  font-size: 10px;
  color: var(--subtle);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* ── Expand icon overlay (appears on hover) ───────────────────────────── */
.csm-photo-thumb-overlay {
  position: absolute;
  bottom: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: rgba(15, 15, 15, 0.65);
  border-radius: var(--radius-sm);
  color: #fff;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.csm-photo-thumb:hover .csm-photo-thumb-overlay {
  opacity: 1;
}

/* ── Caption below thumbnail ──────────────────────────────────────────── */
.csm-photo-thumb-caption {
  font-size: 11px;
  color: var(--mid);
  line-height: 1.55;
  font-family: var(--font-sans);
  padding: 0 2px;
}

/* ── Site visit intro text ────────────────────────────────────────────── */
.csm-site-visit-intro {
  margin-bottom: 16px;
}

/* ── Dark mode adjustments ────────────────────────────────────────────── */
html[data-theme="dark"] .csm-photo-thumb-img-wrap {
  border-color: rgba(240, 238, 233, 0.08);
  background: #1C1B16;
}
html[data-theme="dark"] .csm-photo-thumb:hover .csm-photo-thumb-img-wrap {
  border-color: var(--amber);
}
html[data-theme="dark"] .csm-photo-group-label {
  color: rgba(240, 238, 233, 0.35);
  border-bottom-color: rgba(240, 238, 233, 0.08);
}
html[data-theme="dark"] .csm-photo-thumb-caption {
  color: rgba(240, 238, 233, 0.5);
}

/* ═══════════════════════════════════════════════════════════════════════
   FIELD PROOF STRIP — Newport Case Study
   Always-visible 2-photo credibility bar placed after Designer's Note.
   ═══════════════════════════════════════════════════════════════════════ */

.csm-field-proof {
  margin: 0 0 28px;
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ghost);
}

/* ── Header bar ────────────────────────────────────────────────────────── */
.csm-fp-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 0.5px solid var(--border);
  background: var(--canvas);
}
.csm-fp-eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--subtle);
  font-family: var(--font-mono);
}

/* ── 2 or 3-column photo grid (auto-fits to number of photos) ──────────── */
.csm-fp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0;
}
@media (max-width: 600px) {
  .csm-fp-grid { grid-template-columns: 1fr; }
}

/* ── Single photo card ─────────────────────────────────────────────────── */
.csm-fp-photo {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border-right: 0.5px solid var(--border);
  outline: none;
  transition: background 0.15s ease;
}
.csm-fp-photo:last-child { border-right: none; }
.csm-fp-photo:hover { background: var(--ghost); }
.csm-fp-photo:focus-visible .csm-fp-img-wrap {
  box-shadow: 0 0 0 2px var(--amber);
}

/* ── Image container ───────────────────────────────────────────────────── */
.csm-fp-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--mist);
}
.csm-fp-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.csm-fp-photo:hover .csm-fp-img { transform: scale(1.03); }

/* ── Expand icon overlay ───────────────────────────────────────────────── */
.csm-fp-expand-icon {
  position: absolute;
  bottom: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: rgba(15, 15, 15, 0.6);
  border-radius: var(--radius-sm);
  color: #fff;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.csm-fp-photo:hover .csm-fp-expand-icon { opacity: 1; }

/* ── Caption ───────────────────────────────────────────────────────────── */
.csm-fp-caption {
  font-size: 11px;
  color: var(--mid);
  line-height: 1.55;
  padding: 10px 14px 12px;
  margin: 0;
  border-top: 0.5px solid var(--border);
}

/* ── "View all photos" expand button ───────────────────────────────────── */
.csm-gallery-expand-wrap {
  padding: 12px 0 4px;
  text-align: center;
}
.csm-gallery-expand-btn {
  font-size: 11px;
  font-weight: 600;
  color: var(--subtle);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  background: none;
  border: 0.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.csm-gallery-expand-btn:hover {
  color: var(--ink);
  border-color: var(--amber);
}

/* ── Dark mode ─────────────────────────────────────────────────────────── */
html[data-theme="dark"] .csm-field-proof {
  background: #1C1B16;
  border-color: rgba(240, 238, 233, 0.08);
}
html[data-theme="dark"] .csm-fp-header {
  background: #141310;
  border-bottom-color: rgba(240, 238, 233, 0.08);
}
html[data-theme="dark"] .csm-fp-photo {
  border-right-color: rgba(240, 238, 233, 0.08);
}
html[data-theme="dark"] .csm-fp-photo:hover { background: #141310; }
html[data-theme="dark"] .csm-fp-caption {
  color: rgba(240, 238, 233, 0.45);
  border-top-color: rgba(240, 238, 233, 0.08);
}
html[data-theme="dark"] .csm-gallery-expand-btn {
  border-color: rgba(240, 238, 233, 0.12);
  color: rgba(240, 238, 233, 0.4);
}
html[data-theme="dark"] .csm-gallery-expand-btn:hover {
  color: rgba(240, 238, 233, 0.9);
  border-color: var(--amber);
}

/* ═══ Phase 2 patch: fluid type for .csm-outcome-metric / .csm-tagline (was styles.css lines 2903-2913) ═══ */
/* Case study modal outcome metric numbers — €500K, NPS +47, etc.
   Was: 2rem fixed → now fluid */
.csm-outcome-metric {
  font-size: clamp(1.4rem, 3vw, 2rem);
}

/* Case study modal tagline (supporting text below the big title)
   Was: 16px fixed → slight fluid nudge for narrow screens */
.csm-tagline {
  font-size: clamp(0.9rem, 1.5vw, 1rem);
}

/* ═══ Case Study Page — spacing & polish fixes (was styles.css lines 3145-3210) ═══ */
/* ═══════════════════════════════════════════════════════════════════════
   CASE STUDY PAGE — SPACING & POLISH FIXES
   Fixes the three touching-section gaps reported:
   1. Designer's note → Field proof
   2. Field proof → Meta bar
   3. Meta bar → Metrics
   Plus general rhythm improvements throughout the overview.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── 1. Designer's note: restore bottom breathing room ───────────────── */
/* Was: margin-bottom:0. The note now sits 40px above the field proof. */
.csm-designer-note {
  margin-bottom: 40px !important;
}

/* ── 2. Field proof → Meta bar: more air beneath the photo strip ──────── */
/* Was: margin: 0 0 28px. Push it to 40px for a clear visual break. */
.csm-field-proof {
  margin-bottom: 40px !important;
}

/* ── 3. Meta bar → Metrics: give the meta bar proper top space ────────── */
/* Was: margin-top: 4px — essentially flush with whatever precedes it.   */
/* Now: 0px top (field proof margin-bottom already handles the gap above) */
/* and 32px bottom so the metrics strip breathes beneath it.             */
.csm-meta-bar {
  margin-top: 0 !important;
  margin-bottom: 32px !important;
}

/* ── 4. Metrics strip → CEO quote / problem statement ────────────────── */
/* .csm-metrics has no bottom spacing. Give it a clear bottom margin      */
/* so the CEO quote or section below it doesn't collide.                 */
.csm-metrics {
  margin-bottom: 0 !important; /* border-bottom already acts as divider */
}

/* ── 5. CEO quote: more vertical padding inside the callout ──────────── */
/* The quote card currently feels tight. Extra padding improves legibility. */
.csm-ceo-quote {
  margin-top: 8px;
  margin-bottom: 8px;
}

/* ── 6. Section vertical rhythm — all .csm-section get consistent gap ── */
/* First section after the metrics strip needs a top breathing room.     */
.csm-wrap > .csm-section:first-of-type {
  padding-top: 48px;
}

/* ── 7. Outcomes section: breathing room above ────────────────────────── */
/* The outcomes section (#csm-sec-outcomes anchor + .csm-section-outcomes) */
/* was flush against the section above. Extra top margin fixes this.      */
.csm-section-outcomes {
  margin-top: 16px !important;
}

/* ── 8. Reduced-motion: no transition on read progress (already set,
        but belt-and-suspenders for the sticky version) ─────────────── */
@media (prefers-reduced-motion: reduce) {
  .csm-meta-bar,
  .csm-field-proof,
  .csm-designer-note { transition: none; }
}


