/* ===== Tokens ===== */
:root {
  --bg: #FAFAF7;
  --bg-warm: #F3F0E6;
  --ink: #1A1A17;
  --ink-2: #2E2E29;
  --muted: #6B6B65;
  --muted-2: #9C9A90;
  --rule: #E4E1D4;
  --panel: #FFFFFF;
  --accent: #0E7E8C;          /* teal */
  --accent-ink: #0A5B66;
  --accent-soft: #D6E9EB;
  --warn: #B05B3C;             /* persimmon (used sparingly for failure signals) */
  --warn-soft: #F3E3DB;
  --good: #4B7A5A;
  --good-soft: #DCE8E0;
  --customer: #8E8F99;
  --pro-bubble: #2E2E29;

  --serif: "Fraunces", Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-md: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  scroll-snap-type: y proximity;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== Slide shell ===== */
.slide {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 7vh clamp(24px, 6vw, 96px) 10vh;
  scroll-snap-align: start;
  position: relative;
  border-bottom: 1px solid var(--rule);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease), transform 900ms var(--ease);
}
.slide.in-view { opacity: 1; transform: translateY(0); }

.slide-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 28px;
  font-weight: 500;
}

/* ===== Typography ===== */
.display-xl,
.display-lg,
.display-md {
  font-family: var(--serif);
  font-weight: 340;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 28px;
}
.display-xl {
  font-size: clamp(44px, 7.2vw, 104px);
  line-height: 1.02;
  font-variation-settings: "opsz" 144, "SOFT" 40;
}
.display-lg {
  font-size: clamp(36px, 5.2vw, 76px);
  line-height: 1.06;
}
.display-md {
  font-size: clamp(28px, 3.8vw, 54px);
  line-height: 1.1;
}

em.accent-word {
  font-style: italic;
  font-weight: 320;
  color: var(--accent-ink);
  font-family: var(--serif);
}

.body {
  font-size: clamp(16px, 1.25vw, 19px);
  color: var(--ink-2);
  max-width: 62ch;
  margin: 0 0 18px;
}
.body-wide { max-width: 70ch; }

.subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 320;
  font-size: clamp(20px, 1.9vw, 28px);
  color: var(--muted);
  margin: 8px 0 40px;
  max-width: 40ch;
}

.byline {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin: 0 0 4px;
}
.byline .dot { margin: 0 8px; color: var(--muted-2); }
.meta {
  font-size: 12px;
  color: var(--muted-2);
  margin: 8px 0 0;
  letter-spacing: 0.04em;
}

.takeaway {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(18px, 1.5vw, 22px);
  color: var(--accent-ink);
  margin-top: 28px;
  border-left: 2px solid var(--accent);
  padding-left: 18px;
  max-width: 58ch;
}
.takeaway-quiet { color: var(--ink-2); border-left-color: var(--muted-2); }

.footnote {
  font-size: 13px;
  color: var(--muted);
  margin-top: 32px;
  max-width: 66ch;
  line-height: 1.55;
}

.confidence-note {
  font-size: 12px;
  color: var(--muted-2);
  margin-top: 16px;
  font-style: italic;
}

/* ===== Pull quote ===== */
.pullquote {
  margin: 28px 0 0;
  max-width: 54ch;
}
.pullquote blockquote {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 340;
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 8px;
  padding: 0;
  quotes: none;
}
.pullquote figcaption {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.pullquote-inline { margin-top: 20px; }

/* ===== Two-col layout ===== */
.two-col {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}

/* ===== SLIDE 1 — title ===== */
.slide-title { background: linear-gradient(180deg, var(--bg) 0%, #F5F3EB 100%); }
.hero-visual {
  margin-bottom: 44px;
  max-width: 520px;
  width: 100%;
}
.hero-visual svg { width: 100%; height: auto; display: block; }

/* ===== SLIDE 2 — funnel ===== */
.funnel-viz { width: 100%; max-width: 400px; display: block; }
.funnel-viz .avatar {
  fill: var(--pro-bubble);
  transition: opacity 600ms var(--ease);
}
.funnel-viz .avatar.strong { fill: var(--accent); }
.funnel-viz .avatar.dim { fill: var(--muted-2); opacity: 0.35; }
.funnel-viz .row-label {
  font-family: var(--sans);
  font-size: 11px;
  fill: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.funnel-viz .callout {
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  fill: var(--warn);
}

/* ===== SLIDE 3 — methodology ===== */
.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  margin: 32px 0 16px;
}
.method-diagram {
  height: 180px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}
.method-diagram svg { width: 100%; height: 100%; }
.silhouette.customer { fill: var(--ink); }
.silhouette.pro { fill: var(--accent); fill-opacity: 0.85; }
.method-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.method-copy {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.6;
  margin: 0;
  max-width: 42ch;
}
.concept-pills .pill {
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 1;
}
.concept-pills .pill-text {
  font-family: var(--sans);
  font-size: 11px;
  fill: var(--accent-ink);
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* ===== Section dividers ===== */
.slide-divider {
  background: var(--bg-warm);
  text-align: left;
  min-height: 100vh;
}
.slide-divider .slide-inner { max-width: 960px; }
.numeral {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(120px, 22vw, 280px);
  line-height: 0.85;
  color: var(--ink);
  letter-spacing: -0.04em;
  margin-bottom: 0;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.divider-02 { background: #F0EAE2; }
.divider-03 { background: #EAE7DC; }
.divider-title {
  font-family: var(--serif);
  font-weight: 340;
  font-size: clamp(28px, 4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 24px 0 20px;
  color: var(--ink);
}
.divider-meta {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
}

/* ===== SLIDE 5 — refinements + bubble compare ===== */
.refinements {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin: 32px 0 48px;
  max-width: 900px;
}
.refinement { position: relative; }
.ref-num {
  font-family: var(--serif);
  font-size: 42px;
  color: var(--accent);
  font-weight: 300;
  line-height: 1;
  margin-bottom: 10px;
  font-style: italic;
}
.ref-title {
  font-family: var(--serif);
  font-weight: 420;
  font-size: 20px;
  margin: 0 0 10px;
  line-height: 1.25;
  letter-spacing: -0.005em;
}
.ref-body {
  font-size: 15px;
  color: var(--ink-2);
  margin: 0;
  line-height: 1.6;
  max-width: 42ch;
}

.bubble-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 20px;
}
.bubble-panel { display: flex; flex-direction: column; gap: 14px; }
.bubble {
  padding: 16px 20px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.5;
  max-width: 420px;
}
.bubble p { margin: 0 0 8px; }
.bubble p:last-child { margin: 0; }
.bubble ul { margin: 8px 0; padding-left: 18px; }
.bubble ul li { margin-bottom: 4px; }
.bubble-pro {
  background: var(--pro-bubble);
  color: #F5F3EB;
  border-bottom-left-radius: 6px;
  align-self: flex-start;
}
.bubble-customer {
  background: var(--bg-warm);
  color: var(--ink);
  border-bottom-right-radius: 6px;
  align-self: flex-end;
}
.bubble-bad {
  background: #3B2925;
}
.bubble-good {
  background: var(--accent-ink);
}
.bubble-label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}
.bubble-sm {
  font-size: 14px;
  padding: 12px 16px;
}

/* ===== SLIDE 6 — listening / quote hero ===== */
.slide-quote-hero .listening-h {
  max-width: 22ch;
  margin-bottom: 48px;
}
.quote-stage {
  position: relative;
  padding: 30px 0 20px;
  margin: 0 0 12px;
}
.bubbles-behind {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
}
.bubbles-behind .bubble-customer { align-self: flex-start; max-width: 300px; }
.bubbles-behind .bubble-pro { align-self: flex-end; max-width: 320px; }
.bubbles-behind mark {
  background: var(--accent-soft);
  color: var(--accent-ink);
  padding: 0 4px;
  border-radius: 3px;
}
.bubble-faded { background: #5A4A46; color: #D8D3C6; }
.hero-quote {
  position: relative;
  z-index: 2;
  margin: 0;
  max-width: 800px;
  padding: 40px 0;
}
.hero-quote blockquote {
  font-family: var(--serif);
  font-weight: 340;
  font-style: italic;
  font-size: clamp(26px, 3.4vw, 46px);
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
  quotes: none;
}
.hero-quote blockquote em { color: var(--accent-ink); }
.q-mark {
  font-family: var(--serif);
  color: var(--accent);
  font-style: normal;
}
.hero-quote figcaption {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ===== SLIDE 7 — bimodal chart ===== */
.bimodal-chart { width: 100%; display: block; }
.bimodal-chart .axes line { stroke: var(--ink); stroke-width: 1; }
.bimodal-chart .axis-label { font-family: var(--sans); font-size: 11px; fill: var(--muted); letter-spacing: 0.04em; }
.bimodal-chart .tick-label { font-family: var(--sans); font-size: 10px; fill: var(--muted-2); }
.bimodal-chart .curve { fill: none; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.bimodal-chart .curve-efficiency { stroke: var(--warn); opacity: 0.85; }
.bimodal-chart .curve-detail { stroke: var(--accent); opacity: 0.9; }
.bimodal-chart .curve-label { font-family: var(--serif); font-size: 13px; font-style: italic; }
.bimodal-chart .curve-label-efficiency { fill: var(--warn); }
.bimodal-chart .curve-label-detail { fill: var(--accent-ink); }
.bimodal-chart .zone-label { font-family: var(--sans); font-size: 11px; fill: var(--accent-ink); letter-spacing: 0.04em; font-weight: 500; }

/* ===== SLIDE 8 — archetypes ===== */
.arch-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 32px;
}
.arch-row {
  display: grid;
  grid-template-columns: 260px 1fr 200px 90px;
  gap: 24px;
  align-items: center;
  padding: 16px 20px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--panel);
  transition: transform 300ms var(--ease);
}
.arch-row:hover { transform: translateX(4px); }
.arch-label { display: flex; flex-direction: column; gap: 4px; }
.arch-name {
  font-family: var(--serif);
  font-weight: 440;
  font-size: 16px;
  letter-spacing: -0.005em;
}
.arch-pattern {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.arch-desc {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.4;
}
.arch-bar {
  height: 10px;
  width: 100%;
  background: var(--rule);
  border-radius: 5px;
  overflow: hidden;
  display: flex;
}
.arch-bar.split .bar-fill:first-child { border-right: 2px solid var(--bg); }
.bar-fill { height: 100%; }
.fill-good { background: var(--accent); }
.fill-fail { background: var(--warn); }
.arch-verdict {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: right;
  font-weight: 500;
}
.arch-verdict.strong { color: var(--ink); }
.arch-best { background: #F2F7F8; border-color: var(--accent-soft); }
.arch-hardfail { background: #FBF2ED; border-color: var(--warn-soft); }

/* ===== SLIDE 10 — C2 compare ===== */
.c2-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin: 32px 0 24px;
  position: relative;
  align-items: start;
  justify-items: center;
}
.c2-col {
  position: relative;
  padding: 30px 0;
  max-width: 300px;
  width: 100%;
}
.c2-label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 12px;
  font-weight: 500;
}
.screen-wrap {
  position: relative;
  width: 280px;
  max-width: 100%;
  margin: 0 auto;
}
.screen-img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 18px 36px rgba(26, 26, 23, 0.14)) drop-shadow(0 4px 10px rgba(26, 26, 23, 0.06));
}
.annotation {
  position: absolute;
  z-index: 3;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  line-height: 1.3;
  letter-spacing: -0.005em;
  display: flex;
  align-items: center;
  gap: 4px;
  pointer-events: none;
}
.anno-text { white-space: nowrap; }
.anno-arrow { width: 150px; height: 30px; flex-shrink: 0; overflow: visible; }

/* C1 annotations: text sits outside the image on the left; arrow reaches across to a specific feature inside. */
.anno-c1-msg,
.anno-c1-send {
  right: calc(100% - 150px);
  color: var(--warn);
}
.anno-c1-msg  { top: 378px; }  /* points into the message textarea */
.anno-c1-send { top: 540px; }  /* points down to the Send button */

/* C2 annotations: arrow enters the image from the right; text sits outside on the right. */
.anno-c2-toggles,
.anno-c2-button {
  left: calc(100% - 150px);
  color: var(--accent-ink);
}
.anno-c2-toggles { top: 372px; }  /* points into the toggle chips */
.anno-c2-button  { top: 566px; }  /* points down to Use this reply */

.accent-tag {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(18px, 1.6vw, 24px);
  color: var(--accent-ink);
  text-align: center;
  margin: 24px 0 40px;
  letter-spacing: -0.005em;
}
.c2-takeaway {
  border-top: 1px solid var(--rule);
  padding-top: 28px;
  max-width: 70ch;
}
.c2-takeaway > p { font-size: 16px; color: var(--ink-2); margin: 0 0 8px; }

/* ===== SLIDE 11 — C3 diagram ===== */
.c3-diagram {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  gap: 20px;
  align-items: center;
  margin-bottom: 20px;
}
.c3-view {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 18px;
}
.c3-view-list { opacity: 0.72; }
.c3-view-label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.lead-row {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 13px;
}
.lead-row:last-child { border-bottom: 0; }
.lead-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg-warm);
}
.lead-text { display: flex; flex-direction: column; }
.lead-name { font-weight: 500; color: var(--ink); font-size: 13px; }
.lead-preview { color: var(--muted); font-size: 11px; }
.btn-send {
  padding: 6px 14px;
  font-size: 12px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
}
.btn-send.disabled {
  background: transparent;
  color: var(--muted-2);
  border-color: var(--muted-2);
  text-decoration: line-through;
  cursor: not-allowed;
}
.btn-send.live { box-shadow: 0 4px 12px -4px rgba(14, 126, 140, 0.5); }
.c3-arrow svg { width: 100%; height: auto; }
.detail-card {
  border: 1px solid var(--accent-soft);
  border-radius: 10px;
  padding: 14px;
  background: #F5FAFB;
}
.detail-hdr { font-weight: 500; font-size: 14px; margin-bottom: 6px; }
.detail-meta { font-size: 11px; color: var(--muted); letter-spacing: 0.04em; margin-bottom: 12px; }
.detail-msg { font-size: 13px; color: var(--ink-2); line-height: 1.5; margin-bottom: 14px; font-style: italic; }
.c3-caption {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--muted);
  text-align: center;
  margin: 0;
}

/* ===== SLIDE 12 — converge ===== */
.converge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin: 32px 0;
  position: relative;
}
.converge-grid::after {
  content: "";
  position: absolute;
  top: 10%;
  bottom: 10%;
  left: 50%;
  width: 1px;
  background: var(--rule);
}
.converge-title {
  font-family: var(--serif);
  font-weight: 440;
  font-size: 20px;
  margin: 0 0 12px;
  letter-spacing: -0.005em;
}
.converge-copy { font-size: 15px; color: var(--ink-2); line-height: 1.6; margin: 0; max-width: 46ch; }

.converge-visual {
  display: flex;
  justify-content: center;
  margin: 16px 0 24px;
}
.converge-visual svg { max-width: 480px; width: 100%; height: auto; }
.converge-visual .bubble-shape.pro { fill: var(--pro-bubble); }
.converge-visual .bubble-text {
  font-family: var(--sans);
  font-size: 10px;
  fill: #F5F3EB;
  letter-spacing: 0.02em;
}
.converge-visual .noticing {
  font-family: var(--serif);
  font-size: 13px;
  font-style: italic;
  fill: var(--ink);
}

.bottom-takeaway {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 16px 22px;
  font-size: 15px;
  color: var(--ink);
  max-width: 80ch;
  border-radius: 0 8px 8px 0;
  margin: 16px 0 0;
}

/* ===== SLIDE 14 — specimens ===== */
.specimen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 36px;
}
.specimen {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 28px 28px 24px;
  position: relative;
  transition: transform 300ms var(--ease), box-shadow 300ms var(--ease);
}
.specimen:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -16px rgba(0,0,0,0.14);
}
.specimen-num {
  font-family: var(--serif);
  font-size: 34px;
  font-weight: 300;
  font-style: italic;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
}
.specimen-title {
  font-family: var(--serif);
  font-weight: 440;
  font-size: 18px;
  margin: 0 0 14px;
  letter-spacing: -0.005em;
  line-height: 1.3;
}
.specimen-example {
  border-top: 1px solid var(--rule);
  padding-top: 14px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.55;
}
.specimen-example p { margin: 0 0 6px; font-family: var(--serif); font-style: italic; }
.specimen-example p:last-child { margin-bottom: 0; }
.spec-label {
  display: inline-block;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--sans);
  font-style: normal;
}
.spec-note {
  font-family: var(--sans) !important;
  font-style: normal !important;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px !important;
}
.specimen-example s { color: var(--muted-2); }

/* ===== SLIDE 15 — prompt diagram ===== */
.prompt-diagram { margin: 32px auto; max-width: 760px; }
.prompt-diagram svg { width: 100%; height: auto; }
.prompt-diagram .pd-title { font-family: var(--sans); font-size: 13px; font-weight: 500; fill: var(--ink); letter-spacing: 0.04em; }
.prompt-diagram .pd-existing { font-family: var(--sans); font-size: 12px; fill: var(--muted); }
.prompt-diagram .pd-new-title { font-family: var(--sans); font-size: 11px; fill: var(--accent-ink); font-weight: 500; letter-spacing: 0.02em; }
.prompt-diagram .pd-new-sub { font-family: var(--sans); font-size: 10px; fill: var(--accent-ink); opacity: 0.75; }
.prompt-diagram .pd-output { font-family: var(--serif); font-size: 14px; font-style: italic; fill: var(--ink); }
.deadline {
  text-align: center;
  font-size: 14px;
  color: var(--ink);
  margin: 24px 0 0;
  letter-spacing: 0.02em;
}

/* ===== SLIDE 16 — tensions / scales ===== */
.tensions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 56px;
  margin-top: 36px;
}
.tension {
  padding: 24px 0;
  border-top: 1px solid var(--rule);
}
.scale {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.scale-weight {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink);
  text-align: center;
  padding: 10px 14px;
  background: var(--bg-warm);
  border-radius: 8px;
  letter-spacing: -0.005em;
}
.scale-weight:nth-child(3) { background: var(--accent-soft); color: var(--accent-ink); }
.scale-beam {
  width: 24px;
  height: 1px;
  background: var(--muted-2);
  position: relative;
}
.scale-beam::before {
  content: "";
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--muted);
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
}
.tension-copy {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.55;
  max-width: 48ch;
}

/* ===== SLIDE 17 — NUX ===== */
.slide-quiet { background: #FBFAF4; }
.nux-journey {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin: 40px 0 32px;
  max-width: 800px;
}
.journey-step { flex: 1; }
.journey-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--muted-2);
  margin-bottom: 14px;
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--muted-2);
}
.journey-step.hl .journey-dot { background: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.journey-step.sensitive .journey-dot { background: var(--warn); box-shadow: 0 0 0 1px var(--warn); }
.journey-label {
  font-family: var(--serif);
  font-weight: 440;
  font-size: 16px;
  margin: 0 0 4px;
}
.journey-sub {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin: 0;
}
.journey-step.sensitive .journey-sub { color: var(--warn); }
.journey-line {
  flex: 0 0 40px;
  height: 1px;
  background: var(--rule);
  margin-top: 22px;
}

/* ===== SLIDE 18 — close ===== */
.slide-close { background: linear-gradient(180deg, var(--bg) 0%, #F3F0E6 100%); }
.close-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin: 40px 0;
}
.close-col {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 0 0 24px;
  overflow: hidden;
}
.close-hdr {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--rule);
}
.close-tab {
  width: 10px; height: 10px; border-radius: 2px;
}
.hdr-prompt .close-tab { background: var(--accent); }
.hdr-mbt .close-tab { background: #C9A47C; }
.hdr-measure .close-tab { background: var(--ink); }
.close-title {
  font-family: var(--serif);
  font-weight: 440;
  font-size: 18px;
  flex: 1;
}
.close-when {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.close-list {
  margin: 0;
  padding: 20px 24px 0;
  list-style: none;
}
.close-list li {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.5;
  padding: 8px 0;
  border-bottom: 1px dashed var(--rule);
  position: relative;
  padding-left: 16px;
}
.close-list li:last-child { border-bottom: 0; }
.close-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--muted-2);
}
.parallel-note {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  margin: 0 0 32px;
}
.close-sign {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.close-sign .dot { margin: 0 8px; color: var(--muted-2); }
.close-sign .quiet { color: var(--muted-2); }

/* ===== Chrome (nav) ===== */
.chrome {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 100;
  padding: 12px clamp(16px, 4vw, 40px) 16px;
  background: linear-gradient(180deg, rgba(250,250,247,0) 0%, rgba(250,250,247,0.92) 50%, rgba(250,250,247,0.98) 100%);
  backdrop-filter: blur(6px);
  pointer-events: none;
}
.progress {
  height: 2px;
  background: var(--rule);
  max-width: 100%;
  margin-bottom: 12px;
  border-radius: 2px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 6%;
  transition: width 500ms var(--ease);
}
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  pointer-events: auto;
}
.chev {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background: var(--panel);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 200ms var(--ease);
}
.chev:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chev:disabled { opacity: 0.4; cursor: not-allowed; }
.counter {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
  min-width: 60px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.counter .slash { color: var(--muted-2); margin: 0 4px; }
.counter #currentSlide { color: var(--ink); font-weight: 500; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .two-col, .method-grid, .refinements, .bubble-compare,
  .converge-grid, .tensions-grid, .specimen-grid, .close-cols,
  .c2-compare {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .converge-grid::after { display: none; }
  .c3-diagram { grid-template-columns: 1fr; }
  .c3-arrow { transform: rotate(90deg); margin: 0 auto; }
  .slide { padding: 6vh 20px 8vh; }
  .annotation { display: none; }
  .nux-journey { flex-direction: column; gap: 12px; }
  .journey-line { width: 1px; height: 20px; margin: 0 0 0 7px; }
  .arch-row { grid-template-columns: 1fr; gap: 8px; }
  .arch-verdict { text-align: left; }
  .hero-visual { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 15px; }
  .slide { min-height: auto; padding: 10vh 16px; }
  .chrome { padding: 8px 16px 12px; }
  .eyebrow { margin-bottom: 20px; }
  .bubbles-behind { display: none; }
}

/* ===== Motion preferences ===== */
@media (prefers-reduced-motion: reduce) {
  .slide { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}