/* ============================================================
   CPM Growth Systems — Case Study page styles
   Extends css/styles.css (loaded first). Scoped to the
   long-form case-study layout: chapter nav, timeline,
   diagrams, pull quotes, expandables, print/PDF.
   ============================================================ */

/* ---------- Reading progress bar ---------- */

.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--gradient-accent);
  z-index: 200;
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
}

/* ---------- Case hero ---------- */

.case-hero {
  padding: 190px 0 90px;
  position: relative;
  isolation: isolate;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.case-hero .hero-bg::after {
  background:
    linear-gradient(0deg, var(--bg) 6%, rgba(4, 7, 15, 0.86) 55%, rgba(4, 7, 15, 0.9) 100%);
}
.case-hero h1 { max-width: 880px; margin-bottom: 22px; }
.case-hero .lead { max-width: 720px; }

.case-meta {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin-top: 52px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.case-meta > div {
  background: rgba(7, 13, 28, 0.75);
  padding: 18px 20px;
}
.case-meta .k {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 6px;
}
.case-meta .v {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
}
@media (max-width: 920px) { .case-meta { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .case-meta { grid-template-columns: 1fr; } }

/* ---------- Chapter nav (sticky sub-nav) ---------- */

.chapter-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(4, 7, 15, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.chapter-nav .container {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-top: 0;
  padding-bottom: 0;
}
.chapter-nav .container::-webkit-scrollbar { display: none; }
.chapter-nav a {
  flex-shrink: 0;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 14px 14px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.chapter-nav a:hover { color: var(--text); }
.chapter-nav a.active { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ---------- Section numbering ---------- */

.sec-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--dim);
  margin-bottom: 10px;
}
.sec-num em { color: var(--cyan); font-style: normal; }

/* Anchor offset so the sticky chapter nav doesn't cover headings */
.case-section { scroll-margin-top: 72px; }

/* ---------- Executive summary ---------- */

.exec-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: start;
}
.exec-grid .exec-copy p + p { margin-top: 16px; }
.exec-grid .exec-copy p strong { color: var(--text); }
.exec-aside {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.exec-aside h3 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--dim); margin-bottom: 18px; }
.exec-aside ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.exec-aside li { display: flex; gap: 10px; font-size: 0.9rem; color: var(--muted); }
.exec-aside li::before { content: "→"; color: var(--cyan); font-weight: 700; flex-shrink: 0; }
@media (max-width: 860px) { .exec-grid { grid-template-columns: 1fr; } }

/* ---------- Metric band ---------- */

.metric-band {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--border);
}
.metric-band > div {
  background: var(--bg-raised);
  padding: 26px 20px;
  text-align: center;
}
.metric-band .num {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  font-weight: 700;
  color: var(--text);
}
.metric-band .num em { color: var(--cyan); font-style: normal; }
.metric-band .label { font-size: 0.76rem; color: var(--dim); margin-top: 6px; line-height: 1.4; }
@media (max-width: 920px) { .metric-band { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .metric-band { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Pull quotes ---------- */

.pullquote {
  border-left: 3px solid var(--cyan);
  padding: 8px 0 8px 32px;
  margin: 0 auto;
  max-width: 860px;
}
.pullquote blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  font-weight: 500;
  line-height: 1.45;
  color: var(--text);
  letter-spacing: -0.01em;
}
.pullquote blockquote::before { content: "“"; color: var(--cyan); }
.pullquote blockquote::after { content: "”"; color: var(--cyan); }
.pullquote.statement blockquote::before, .pullquote.statement blockquote::after { content: none; }
.pullquote .attribution { display: flex; align-items: center; gap: 12px; margin-top: 22px; }
.pullquote .avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  opacity: 0.8;
  flex-shrink: 0;
}
.pullquote .attribution strong { display: block; font-size: 0.94rem; }
.pullquote .attribution span { font-size: 0.82rem; color: var(--dim); }

/* ---------- Objectives / numbered list ---------- */

.objective-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.objective {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 24px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.objective:hover { border-color: var(--border-bright); transform: translateY(-3px); }
.objective .obj-num {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
  display: block;
  margin-bottom: 12px;
}
.objective h3 { font-size: 1.02rem; margin-bottom: 8px; }
.objective p { font-size: 0.87rem; }
@media (max-width: 920px) { .objective-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .objective-grid { grid-template-columns: 1fr; } }

/* ---------- Approach timeline ---------- */

.timeline { position: relative; max-width: 860px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-bright), var(--cyan), rgba(34, 211, 238, 0.1));
}
.timeline-step {
  position: relative;
  padding: 0 0 44px 68px;
}
.timeline-step:last-child { padding-bottom: 0; }
.timeline-step .tl-dot {
  position: absolute;
  left: 0; top: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--navy);
  border: 1px solid var(--border-bright);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}
.timeline-step .tl-phase {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 6px;
}
.timeline-step h3 { font-size: 1.2rem; margin-bottom: 8px; }
.timeline-step p { font-size: 0.94rem; max-width: 640px; }
.timeline-step ul {
  list-style: none;
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.timeline-step ul li {
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 999px;
  padding: 5px 13px;
}

/* ---------- Module grid (CortexCart OS) ---------- */

.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.module {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  padding: 20px;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.module:hover { border-color: var(--border-bright); background: var(--panel-strong); transform: translateY(-3px); }
.module .mod-icon {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: rgba(37, 99, 235, 0.14);
  border: 1px solid rgba(37, 99, 235, 0.3);
  display: grid;
  place-items: center;
  color: var(--cyan);
  margin-bottom: 14px;
}
.module .mod-icon svg { width: 18px; height: 18px; }
.module h3 { font-size: 0.98rem; margin-bottom: 6px; }
.module p { font-size: 0.83rem; }
@media (max-width: 920px) { .module-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .module-grid { grid-template-columns: 1fr; } }

/* ---------- Architecture / pipeline diagrams ---------- */

.diagram-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(37, 99, 235, 0.12), transparent 55%),
    var(--bg-raised);
  padding: 36px 28px;
  overflow-x: auto;
}
.diagram-panel svg { display: block; margin: 0 auto; min-width: 640px; width: 100%; max-width: 960px; height: auto; }
.diagram-caption {
  text-align: center;
  font-size: 0.82rem;
  color: var(--dim);
  margin-top: 18px;
}

/* Pipeline stage chips */
.stage-flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.stage {
  flex: 1 1 0;
  min-width: 118px;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 16px 14px;
  text-align: center;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.stage:hover { border-color: var(--border-bright); transform: translateY(-3px); }
.stage + .stage { margin-left: 26px; }
.stage + .stage::before {
  content: "→";
  position: absolute;
  left: -22px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--cyan);
  font-weight: 700;
}
.stage .stage-num {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
  display: block;
  margin-bottom: 6px;
}
.stage h3 { font-size: 0.88rem; margin-bottom: 4px; }
.stage p { font-size: 0.73rem; line-height: 1.45; }

/* ---------- Expandable sections ---------- */

.expand-list { display: flex; flex-direction: column; gap: 12px; }
details.expand {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.25s ease;
}
details.expand[open] { border-color: var(--border-bright); background: var(--panel-strong); }
details.expand summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
}
details.expand summary::-webkit-details-marker { display: none; }
details.expand summary .chev {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--cyan);
  font-size: 0.85rem;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
details.expand[open] summary .chev { transform: rotate(45deg); border-color: var(--border-bright); }
details.expand .expand-body { padding: 0 22px 22px; }
details.expand .expand-body p { font-size: 0.92rem; }
details.expand .expand-body p + p { margin-top: 10px; }
details.expand .expand-body ul {
  list-style: none;
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
details.expand .expand-body ul li {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 20px;
  position: relative;
}
details.expand .expand-body ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--gradient-accent);
  opacity: 0.85;
}
details.expand summary .sum-tag {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- Before / after comparison ---------- */

.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.compare-grid.with-arrow { grid-template-columns: 1fr 56px 1fr; gap: 0; align-items: stretch; }
.compare-arrow {
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(34, 211, 238, 0.6);
}
.compare-col {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 30px 28px;
  background: var(--panel);
}
.compare-col.after { border-color: rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.04); }
.compare-col h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 20px;
  color: var(--dim);
}
.compare-col.after h3 { color: var(--cyan); }
.compare-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.compare-col li { display: flex; gap: 12px; font-size: 0.92rem; color: var(--muted); align-items: flex-start; }
.compare-col.before li::before { content: "✕"; color: #f87171; font-size: 0.78rem; font-weight: 700; margin-top: 3px; flex-shrink: 0; }
.compare-col.after li::before { content: "✓"; color: var(--cyan); font-size: 0.78rem; font-weight: 700; margin-top: 3px; flex-shrink: 0; }
@media (max-width: 720px) {
  .compare-grid, .compare-grid.with-arrow { grid-template-columns: 1fr; }
  .compare-grid.with-arrow { gap: 0; }
  .compare-arrow { padding: 14px 0; transform: rotate(90deg); }
}

/* ---------- Discovery grid ---------- */

.discover-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.discover-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  padding: 22px 20px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.discover-item:hover { border-color: var(--border-bright); transform: translateY(-3px); }
.discover-item .disc-kicker {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 10px;
}
.discover-item h3 { font-size: 0.96rem; margin-bottom: 8px; }
.discover-item p { font-size: 0.82rem; }
.discover-item p strong { color: var(--text); font-weight: 600; }
@media (max-width: 1020px) { .discover-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .discover-grid { grid-template-columns: 1fr; } }

/* ---------- CTA self-qualifying checklist ---------- */

.cta-checks {
  list-style: none;
  max-width: 480px;
  margin: 0 auto 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}
.cta-checks li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}
.cta-checks li .tick {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.14);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--cyan);
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  margin-top: 1px;
}

/* ---------- Feature testimonial ---------- */

.testimonial-feature {
  position: relative;
  isolation: isolate;
  border-radius: 24px;
  border: 1px solid var(--border-bright);
  padding: 64px 56px;
  background:
    radial-gradient(ellipse at 15% 0%, rgba(37, 99, 235, 0.28), transparent 60%),
    radial-gradient(ellipse at 90% 110%, rgba(34, 211, 238, 0.16), transparent 55%),
    var(--navy);
  overflow: hidden;
}
.testimonial-feature .quote-mark {
  font-family: var(--font-display);
  font-size: 5rem;
  line-height: 0.6;
  color: var(--cyan);
  opacity: 0.85;
  display: block;
  margin-bottom: 26px;
}
.testimonial-feature blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
  letter-spacing: -0.01em;
  max-width: 900px;
}
.testimonial-feature .attribution { display: flex; align-items: center; gap: 14px; margin-top: 34px; }
.testimonial-feature .avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gradient-accent);
  opacity: 0.85;
  flex-shrink: 0;
}
.testimonial-feature .attribution strong { display: block; font-size: 1rem; }
.testimonial-feature .attribution span { font-size: 0.85rem; color: var(--muted); }
@media (max-width: 640px) { .testimonial-feature { padding: 44px 28px; } }

/* ---------- Lessons ---------- */

.lesson-list { display: flex; flex-direction: column; gap: 14px; max-width: 860px; }
.lesson {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.025);
  padding: 22px 24px;
}
.lesson .lesson-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--cyan);
  flex-shrink: 0;
  width: 44px;
}
.lesson h3 { font-size: 1.02rem; margin-bottom: 4px; }
.lesson p { font-size: 0.9rem; }

/* ---------- Roadmap ---------- */

.roadmap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.roadmap-item {
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  background: rgba(255, 255, 255, 0.02);
}
.roadmap-item .rm-phase {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 10px;
}
.roadmap-item h3 { font-size: 0.95rem; margin-bottom: 6px; }
.roadmap-item p { font-size: 0.82rem; }
@media (max-width: 920px) { .roadmap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .roadmap-grid { grid-template-columns: 1fr; } }

/* ---------- Print / PDF export ---------- */

.print-btn { cursor: pointer; }

@media print {
  :root {
    --bg: #ffffff;
    --bg-raised: #f6f7fa;
    --navy: #eef1f8;
    --panel: #f6f7fa;
    --panel-strong: #eef1f8;
    --border: #d4dae6;
    --border-bright: #2563eb;
    --text: #10182b;
    --muted: #3d4a63;
    --dim: #5d6a84;
    --cyan: #0e7490;
    --shadow-glow: none;
  }
  body { background: #fff; color: #10182b; font-size: 12px; }
  .site-header, .chapter-nav, .progress-bar, .nav-toggle,
  .cta-band, .site-footer, .print-btn, .btn-row { display: none !important; }
  .case-hero { padding: 24px 0; }
  .hero-bg { display: none; }
  section { padding: 28px 0; page-break-inside: avoid; }
  .reveal { opacity: 1 !important; transform: none !important; }
  details.expand { page-break-inside: avoid; }
  details.expand summary .chev { display: none; }
  .card, .module, .objective, .stage, .compare-col, .lesson,
  .testimonial-feature, .diagram-panel, .exec-aside {
    box-shadow: none !important;
    backdrop-filter: none !important;
  }
  .testimonial-feature { background: #eef1f8; }
  a { color: #10182b; text-decoration: none; }
  .metric-band .num, .case-metric .num { color: #10182b; }
}