/* =================================================================
   ATL Tech — AI Engineering for Programmers
   Slide deck stylesheet. Implements DESIGN.md tokens + 6 slide forms.
   ================================================================= */

:root {
  /* Palette */
  --paper-cream: #F5F0E6;
  --charcoal-ink: #1C1917;
  --smoke: #3F3F46;
  --mist-border: rgba(28, 25, 23, 0.10);
  --mist-strong: rgba(28, 25, 23, 0.20);
  --graph-grid: rgba(28, 25, 23, 0.05);
  --sand-surface: #EDE7D8;
  --industrial-orange: #E85D2C;
  --on-orange: #FFFFFF;

  /* Type stacks */
  --font-display: "Geist", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-mono: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Geometry */
  --margin-outer: clamp(40px, 4.2vw, 80px);
  --col-gutter: clamp(48px, 5vw, 96px);

  /* Type scale (1920 reference, fluid down to 1280) */
  --t-badge: clamp(11px, 0.72vw, 14px);
  --t-section-num: clamp(56px, 7.5vw, 96px);
  --t-display-num: clamp(72px, 9.2vw, 144px);
  --t-title: clamp(38px, 3.4vw, 64px);
  --t-subtitle: clamp(20px, 1.5vw, 28px);
  --t-body-lg: clamp(16px, 1.18vw, 22px);
  --t-body-sm: clamp(13px, 0.96vw, 18px);
  --t-caption: clamp(11px, 0.74vw, 14px);
  --t-rule-label: clamp(20px, 1.5vw, 28px);

  /* Motion */
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --duration-fade: 240ms;
}

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

html, body {
  height: 100%;
  background: var(--paper-cream);
  color: var(--charcoal-ink);
  font-family: var(--font-display);
  font-feature-settings: "ss01", "ss02", "tnum", "kern";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

/* =================================================================
   Deck container
   ================================================================= */

#deck {
  position: relative;
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  padding: var(--margin-outer);
  display: none;
  flex-direction: column;
  background: var(--paper-cream);
  color: var(--charcoal-ink);
}

.slide.active {
  display: flex;
  animation: fadeIn var(--duration-fade) var(--ease-out) both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* =================================================================
   Slide chrome — section badge, title, subtitle, footer
   ================================================================= */

.badge {
  font-family: var(--font-mono);
  font-size: var(--t-badge);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smoke);
  margin-bottom: clamp(20px, 2vw, 32px);
}

.badge .num {
  color: var(--industrial-orange);
  font-weight: 600;
  margin-right: 0.5ch;
}

.title {
  font-family: var(--font-display);
  font-size: var(--t-title);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.04;
  color: var(--charcoal-ink);
  max-width: 22ch;
}

.subtitle {
  font-family: var(--font-display);
  font-size: var(--t-subtitle);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--smoke);
  margin-top: clamp(8px, 0.8vw, 14px);
  max-width: 40ch;
}

.body-text {
  font-size: var(--t-body-lg);
  font-weight: 400;
  line-height: 1.45;
  color: var(--charcoal-ink);
  max-width: 38ch;
}

.body-text + .body-text {
  margin-top: clamp(10px, 1vw, 16px);
}

.body-text strong { font-weight: 600; }
.body-text em { font-style: normal; color: var(--industrial-orange); font-weight: 500; }

.footer {
  position: absolute;
  bottom: var(--margin-outer);
  right: var(--margin-outer);
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.04em;
  color: var(--smoke);
  text-transform: uppercase;
}

/* Spacer between header block and body */
.body {
  margin-top: clamp(40px, 4vw, 72px);
  flex: 1;
  min-height: 0;
}

/* =================================================================
   FORM A — Title Slab
   ================================================================= */

.form-a .title {
  font-size: clamp(56px, 5.6vw, 112px);
  max-width: 18ch;
  margin-top: auto;
}

.form-a .subtitle {
  margin-top: clamp(16px, 1.6vw, 24px);
  font-size: clamp(22px, 1.8vw, 32px);
  color: var(--charcoal-ink);
  font-weight: 500;
}

.form-a .credit {
  margin-top: auto;
  padding-top: clamp(40px, 4vw, 80px);
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.04em;
  color: var(--smoke);
  text-transform: uppercase;
  display: flex;
  gap: 1ch;
}

.form-a .credit .dot {
  color: var(--mist-strong);
}

.form-a .accent-bar {
  width: clamp(80px, 8vw, 128px);
  height: 4px;
  background: var(--industrial-orange);
  margin-bottom: clamp(20px, 2vw, 32px);
}

/* =================================================================
   FORM B — Two-Column Statement
   ================================================================= */

.form-b .body {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--col-gutter);
  align-items: start;
}

.form-b .body.flip {
  grid-template-columns: 7fr 5fr;
}

.form-b .col h3,
.form-c .col h3 {
  font-family: var(--font-mono);
  font-size: var(--t-badge);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 500;
  margin-bottom: clamp(12px, 1.2vw, 20px);
}

.form-b .col p,
.form-c .col p {
  font-size: var(--t-body-lg);
  line-height: 1.45;
  color: var(--charcoal-ink);
  max-width: 32ch;
}

.form-b .col ul,
.form-c .col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.form-b .col li,
.form-c .col li {
  font-size: var(--t-body-sm);
  line-height: 1.55;
  color: var(--charcoal-ink);
  padding: 14px 0;
  border-top: 1px solid var(--mist-border);
}

.form-b .col li:first-child,
.form-c .col li:first-child {
  border-top: none;
}

/* =================================================================
   FORM C — Compare Columns
   ================================================================= */

.form-c .body {
  display: grid;
  gap: var(--col-gutter);
  align-items: start;
}

.form-c.cols-2 .body { grid-template-columns: 1fr 1fr; }
.form-c.cols-3 .body { grid-template-columns: 1fr 1fr 1fr; }

.form-c .col-label {
  font-family: var(--font-mono);
  font-size: var(--t-badge);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--charcoal-ink);
  padding-bottom: clamp(12px, 1.2vw, 18px);
  border-bottom: 1px solid var(--mist-strong);
  margin-bottom: clamp(20px, 1.8vw, 28px);
}

.form-c .col-label .accent {
  color: var(--industrial-orange);
  margin-right: 0.5ch;
}

/* =================================================================
   FORM D — Diagram Frame (graph grid background)
   ================================================================= */

.form-d {
  background-image:
    linear-gradient(var(--graph-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--graph-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: var(--margin-outer) var(--margin-outer);
}

.form-d .diagram-stage {
  flex: 1;
  display: grid;
  place-items: center;
  margin-top: clamp(24px, 2vw, 40px);
  padding: clamp(20px, 2vw, 40px) 0;
}

.form-d svg {
  width: 100%;
  height: 100%;
  max-width: 1100px;
  max-height: 540px;
  display: block;
}

/* Diagram primitives */
.dgm-box {
  fill: var(--paper-cream);
  stroke: var(--charcoal-ink);
  stroke-width: 1.4;
}

.dgm-box-sand {
  fill: var(--sand-surface);
  stroke: var(--charcoal-ink);
  stroke-width: 1.4;
}

.dgm-box-accent {
  fill: var(--industrial-orange);
  stroke: var(--industrial-orange);
}

.dgm-line {
  stroke: var(--charcoal-ink);
  stroke-width: 1.4;
  fill: none;
}

.dgm-line-dashed {
  stroke: var(--charcoal-ink);
  stroke-width: 1.4;
  stroke-dasharray: 4 6;
  fill: none;
}

text.dgm-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  fill: var(--smoke);
  font-weight: 500;
}

text.dgm-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.005em;
  fill: var(--charcoal-ink);
}

text.dgm-data {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--smoke);
}

text.dgm-on-accent {
  fill: var(--on-orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

/* =================================================================
   FORM E — Manifesto Card
   ================================================================= */

.form-e .manifesto {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 1.6vw, 28px);
  max-width: 1100px;
}

.form-e .row {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: clamp(20px, 1.8vw, 32px);
  align-items: start;
}

.form-e .num-slab {
  width: clamp(48px, 4.2vw, 64px);
  height: clamp(28px, 2.4vw, 36px);
  background: var(--industrial-orange);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  font-weight: 600;
  color: var(--on-orange);
  letter-spacing: 0.06em;
  border-radius: 2px;
  margin-top: clamp(4px, 0.4vw, 6px);
}

.form-e .row-label {
  font-family: var(--font-display);
  font-size: var(--t-rule-label);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--charcoal-ink);
  line-height: 1.15;
}

.form-e .row-explainer {
  font-family: var(--font-display);
  font-size: var(--t-body-sm);
  color: var(--smoke);
  line-height: 1.45;
  margin-top: 4px;
  max-width: 60ch;
}

.form-e .closing-line {
  margin-top: clamp(40px, 4vw, 72px);
  font-family: var(--font-display);
  font-size: var(--t-subtitle);
  font-weight: 500;
  font-style: italic;
  color: var(--charcoal-ink);
  border-left: 4px solid var(--industrial-orange);
  padding-left: clamp(16px, 1.4vw, 24px);
  max-width: 60ch;
}

/* =================================================================
   FORM F — Demo Card (side-by-side: checklist | video)
   ================================================================= */

.form-f .demo-body {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--col-gutter);
  align-items: start;
}

.form-f .demo-left {
  background: var(--sand-surface);
  padding: clamp(24px, 2.2vw, 36px);
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 1.6vw, 24px);
  height: 100%;
}

.form-f .demo-right {
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 0.8vw, 12px);
}

.form-f .demo-caption {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--industrial-orange);
  font-weight: 600;
}

.form-f .demo-statement {
  font-size: clamp(26px, 2.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--charcoal-ink);
  max-width: 18ch;
}

.form-f .demo-checklist {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--mist-strong);
  margin-top: clamp(8px,0.8vw,14px);
}

.form-f .demo-row {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: clamp(10px, 1vw, 16px);
  align-items: baseline;
  padding: clamp(10px, 1vw, 14px) 0;
  border-bottom: 1px solid var(--mist-border);
}

.form-f .demo-row:last-child { border-bottom: 1px solid var(--mist-strong); }

.form-f .demo-step {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--industrial-orange);
}

.form-f .demo-text {
  font-size: var(--t-body-sm);
  font-weight: 500;
  color: var(--charcoal-ink);
  line-height: 1.4;
}

.form-f .demo-time {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  color: var(--smoke);
  letter-spacing: 0.04em;
}

.form-f .demo-video {
  width: 100%;
  background: var(--charcoal-ink);
  border: 1px solid var(--mist-strong);
  aspect-ratio: 16 / 10;
  object-fit: contain;
}

.form-f .demo-video-caption {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--smoke);
}

/* =================================================================
   Slide 2 — Credential card (Claude Partner Network)
   ================================================================= */

.credential-card {
  border: 1px solid var(--mist-strong);
  padding: clamp(20px, 2vw, 32px);
  background: var(--paper-cream);
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.2vw, 18px);
}

.credential-head {
  display: flex;
  align-items: center;
  gap: clamp(16px, 1.4vw, 22px);
}

.claude-mark {
  width: clamp(40px, 3.6vw, 56px);
  height: clamp(40px, 3.6vw, 56px);
  flex: 0 0 auto;
}

.credential-tag {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smoke);
}
.credential-tag .accent {
  color: var(--industrial-orange);
  font-weight: 600;
}

.credential-title {
  font-size: clamp(26px, 2.2vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--charcoal-ink);
}

.credential-blurb {
  font-size: var(--t-body-sm);
  color: var(--smoke);
  line-height: 1.45;
  max-width: 40ch;
}

/* =================================================================
   FORM CONTACT — Slide 19 (Stay in touch)
   ================================================================= */

.form-contact .contact-body {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--col-gutter);
  align-items: stretch;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 2.2vw, 36px);
  justify-content: space-between;
}

.contact-head { display: flex; flex-direction: column; gap: 6px; }

.contact-tag {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--industrial-orange);
  font-weight: 600;
}

.contact-name {
  font-size: clamp(36px, 3vw, 56px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--charcoal-ink);
  line-height: 1.05;
}

.contact-role {
  font-size: var(--t-body-lg);
  color: var(--smoke);
  line-height: 1.4;
}

.contact-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.contact-links li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(16px, 1.4vw, 24px);
  padding: clamp(14px, 1.4vw, 20px) 0;
  border-top: 1px solid var(--mist-border);
  align-items: baseline;
}

.contact-links li:first-child { border-top: 1px solid var(--mist-strong); }
.contact-links li:last-child { border-bottom: 1px solid var(--mist-strong); }

.contact-key {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 600;
}

.contact-val {
  font-family: var(--font-mono);
  font-size: var(--t-body-sm);
  color: var(--charcoal-ink);
  letter-spacing: 0.02em;
  font-weight: 500;
}

.contact-cta {
  font-size: var(--t-body-sm);
  color: var(--smoke);
  line-height: 1.5;
  max-width: 50ch;
}

.contact-qr-block {
  display: grid;
  place-items: center;
  height: 100%;
}

.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(12px, 1vw, 18px);
  padding: clamp(20px, 2vw, 32px);
  background: var(--sand-surface);
  border-left: 4px solid var(--industrial-orange);
}

.contact-qr img {
  width: clamp(220px, 22vw, 360px);
  height: clamp(220px, 22vw, 360px);
  display: block;
  background: var(--paper-cream);
  padding: clamp(8px, 0.8vw, 14px);
}

.contact-qr-caption {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  color: var(--smoke);
  text-transform: uppercase;
  font-weight: 600;
}

/* =================================================================
   Code blocks (Form B/C/16)
   ================================================================= */

.code-block {
  background: var(--sand-surface);
  padding: clamp(20px, 1.8vw, 32px);
  font-family: var(--font-mono);
  font-size: clamp(13px, 1vw, 16px);
  line-height: 1.55;
  color: var(--charcoal-ink);
  white-space: pre;
  overflow: auto;
  border: 1px solid var(--mist-border);
}

.code-caption {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.04em;
  color: var(--smoke);
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* Pull-out callout */
.callout {
  border-left: 4px solid var(--industrial-orange);
  padding-left: clamp(16px, 1.4vw, 24px);
  font-size: var(--t-rule-label);
  font-weight: 500;
  color: var(--charcoal-ink);
  line-height: 1.3;
  max-width: 32ch;
}

.callout em {
  font-style: normal;
  color: var(--industrial-orange);
}

/* Inline mono pill — for filenames, paths inline */
.mono { font-family: var(--font-mono); font-size: 0.92em; }

/* Slide 1 — Opening hero (Form A) — positioned absolutely on the right */
.opening-hero {
  position: absolute;
  right: clamp(40px, 4vw, 96px);
  top: 50%;
  transform: translateY(-50%);
  width: clamp(280px, 26vw, 460px);
  height: auto;
  pointer-events: none;
  z-index: 0;
}

/* Slide 3 / 15 column icons — small editorial vignettes above each col-label */
.col-icon {
  display: block;
  width: clamp(96px, 9vw, 140px);
  height: auto;
  margin-bottom: clamp(14px, 1.4vw, 22px);
  /* Background of the image is exact #F5F0E6, so it blends with the slide. */
}

/* Hero illustration — pinned to top-right corner of the slide so it sits
   beside the title block. Sized to clear the column-icon row in the body. */
.hero-illustration {
  position: absolute;
  top: clamp(36px, 3.4vw, 80px);
  right: clamp(40px, 4vw, 80px);
  width: clamp(180px, 18vw, 300px);
  height: auto;
  margin: 0;
  padding: 0;
  background: transparent;
  pointer-events: none;
  z-index: 0;
}
.hero-illustration img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
}
/* When a hero is pinned top-right, push the body grid below the hero so the
   right column's icon doesn't collide with the hero. */
.has-hero .body {
  flex: 1 1 auto;
  margin-top: clamp(160px, 14vw, 240px);
}

/* Glossary grid — slide 4 (Big Word Alert) */
.glossary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 2.2vw, 40px) clamp(28px, 3vw, 56px);
  align-items: start;
  margin-top: clamp(24px, 2vw, 36px);
}
.glossary-grid.cols-3 {
  grid-template-columns: 1fr 1fr 1fr;
}
.glossary-cell {
  border-top: 1px solid var(--mist-strong);
  padding-top: clamp(14px, 1.4vw, 22px);
}
.glossary-term {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--industrial-orange);
  font-weight: 600;
  margin-bottom: clamp(10px, 0.9vw, 14px);
}
.glossary-cell p {
  font-size: var(--t-body-sm);
  line-height: 1.5;
  color: var(--charcoal-ink);
  max-width: 56ch;
}
.glossary-cell p strong { font-weight: 600; }
.glossary-cell p em { font-style: normal; color: var(--industrial-orange); font-weight: 500; }

/* MCP info bar — slide 5 */
.form-d.has-info-bar .diagram-stage {
  flex: 0 1 auto;
  max-height: 56%;
}
.mcp-info-bar {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: clamp(20px, 1.8vw, 32px);
  margin-top: clamp(16px, 1.4vw, 24px);
  padding-top: clamp(16px, 1.4vw, 24px);
  border-top: 1px solid var(--mist-strong);
}
.mcp-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mcp-col .mcp-key {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smoke);
  font-weight: 600;
}
.mcp-col-accent .mcp-key {
  color: var(--industrial-orange);
}
.mcp-col .mcp-body {
  font-size: var(--t-body-sm);
  color: var(--charcoal-ink);
  line-height: 1.5;
}
.mcp-col .mcp-body .mono {
  background: var(--sand-surface);
  padding: 1px 6px;
  border-radius: 2px;
}
.mcp-col-accent {
  border-left: 3px solid var(--industrial-orange);
  padding-left: clamp(12px, 1.2vw, 18px);
}
.mcp-doc {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  color: var(--smoke);
  letter-spacing: 0.04em;
}

/* Metaphor list (slide 8 — contractor model) */
.metaphor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.metaphor-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: clamp(14px, 1.4vw, 24px);
  padding: clamp(11px, 1vw, 16px) 0;
  border-top: 1px solid var(--mist-border);
  align-items: baseline;
}
.metaphor-list li:first-child { border-top: 1px solid var(--mist-strong); }
.metaphor-list li:last-child { border-bottom: 1px solid var(--mist-strong); }
.metaphor-key {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--industrial-orange);
  font-weight: 600;
}
.metaphor-meta {
  font-size: var(--t-body-sm);
  color: var(--charcoal-ink);
  line-height: 1.45;
}
.metaphor-meta strong { font-weight: 600; }

/* Strong divider */
hr.divider {
  border: none;
  border-top: 1px solid var(--mist-strong);
  margin: clamp(20px, 1.8vw, 32px) 0;
}

/* =================================================================
   HUD — page counter, progress, hint
   ================================================================= */

.hud {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: clamp(44px, 4vh, 56px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--margin-outer);
  background: linear-gradient(to top, rgba(245, 240, 230, 0.96), rgba(245, 240, 230, 0));
  pointer-events: none;
  z-index: 10;
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.04em;
  color: var(--smoke);
  text-transform: uppercase;
}

.hud .counter .current { color: var(--charcoal-ink); font-weight: 600; }
.hud .hint { opacity: 0.7; }

.progress-track {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--mist-border);
  z-index: 11;
}

.progress-fill {
  height: 100%;
  background: var(--industrial-orange);
  width: 0;
  transition: width var(--duration-fade) var(--ease-out);
}

/* =================================================================
   Grid overview
   ================================================================= */

#grid-overlay {
  position: fixed;
  inset: 0;
  background: rgba(245, 240, 230, 0.98);
  backdrop-filter: blur(2px);
  z-index: 20;
  padding: clamp(40px, 4vw, 80px);
  overflow: auto;
  display: none;
}

#grid-overlay[data-open="true"] {
  display: block;
}

#grid-overlay .grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: clamp(16px, 1.6vw, 24px);
  max-width: 1600px;
  margin: 0 auto;
}

#grid-overlay .thumb {
  aspect-ratio: 16 / 9;
  background: var(--paper-cream);
  border: 1px solid var(--mist-border);
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(10px, 1vw, 16px);
  transition: border-color 160ms var(--ease-out), transform 160ms var(--ease-out);
}

#grid-overlay .thumb:hover {
  border-color: var(--industrial-orange);
  transform: translateY(-2px);
}

#grid-overlay .thumb-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--smoke);
  text-transform: uppercase;
}

#grid-overlay .thumb-num .accent { color: var(--industrial-orange); margin-right: 0.5ch; }

#grid-overlay .thumb-title {
  margin-top: 6px;
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--charcoal-ink);
}

#grid-overlay .thumb-form {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--smoke);
  text-transform: uppercase;
}

#grid-overlay .grid-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  max-width: 1600px;
  margin: 0 auto clamp(20px, 2vw, 32px) auto;
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--smoke);
}

#grid-overlay .grid-header strong { color: var(--charcoal-ink); }

/* =================================================================
   Print mode (PDF backup export)
   ================================================================= */

@media print {
  @page { size: 1920px 1080px; margin: 0; }
  html, body { overflow: visible; }
  .slide {
    display: flex !important;
    page-break-after: always;
    width: 1920px;
    height: 1080px;
    position: relative;
    inset: auto;
    animation: none;
  }
  .hud, .progress-track, #grid-overlay { display: none !important; }
}

/* =================================================================
   Below 1024px: tell user to view on a bigger display
   ================================================================= */

@media (max-width: 1023px) {
  body::after {
    content: "This deck is designed for 1024px+ displays. Open on a laptop or projector.";
    position: fixed;
    inset: 0;
    background: var(--paper-cream);
    color: var(--charcoal-ink);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 18px;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 32px;
    z-index: 100;
    line-height: 1.4;
    max-width: 28ch;
    margin: auto;
  }
}

/* Demo video placeholder (mp4 not bundled in hosted deck) */
.demo-video--placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px 24px;
  text-align: center;
  background: rgba(0,0,0,0.05);
  border: 1px dashed rgba(0,0,0,0.2);
  border-radius: 6px;
  min-height: 220px;
}
.demo-video-key {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.6;
}
.demo-video-note {
  font-size: 13px;
  line-height: 1.5;
  opacity: 0.75;
  max-width: 32ch;
}