:root {
  --ink: #050507;
  --carbon: #101010;
  --edge: #3d3a39;
  --signal: #00d992;
  --signal-soft: #2fd6a1;
  --snow: #f2f2f2;
  --paper: #b8b3b0;
  --slate: #8b949e;
  --side: clamp(30px, 6.2vw, 112px);
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--ink); color: var(--snow); }
body {
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-feature-settings: "calt", "rlig";
}
button { font: inherit; }
::selection { color: var(--ink); background: var(--signal); }

.mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.presentation-shell { position: relative; min-height: 100svh; background: var(--ink); isolation: isolate; }
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: translate3d(-520px, -520px, 0);
  background: radial-gradient(circle, rgba(0,217,146,.14) 0%, rgba(0,217,146,.06) 30%, rgba(0,217,146,.018) 56%, transparent 74%);
  mask-image: radial-gradient(circle, #000 0%, rgba(0,0,0,.92) 35%, rgba(0,0,0,.35) 62%, transparent 76%);
  -webkit-mask-image: radial-gradient(circle, #000 0%, rgba(0,0,0,.92) 35%, rgba(0,0,0,.35) 62%, transparent 76%);
  filter: blur(.15px);
  mix-blend-mode: screen;
  transition: transform 90ms linear, opacity .35s ease;
  will-change: transform, opacity;
}
.cursor-glow.is-tracking { opacity: .52; }
.deck {
  height: 100svh;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
}
.deck::-webkit-scrollbar { display: none; }

.brand {
  position: fixed;
  top: 28px;
  left: var(--side);
  z-index: 20;
  color: var(--slate);
  font-size: 11px;
  letter-spacing: .16em;
}
.brand::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  background: var(--signal);
  box-shadow: 0 0 12px rgba(0,217,146,.65);
}
.page-indicator {
  position: fixed;
  right: var(--side);
  top: 24px;
  z-index: 20;
  display: flex;
  align-items: baseline;
  gap: 7px;
  color: var(--slate);
  font-size: 11px;
}
.page-indicator strong { color: var(--snow); font-size: 18px; font-weight: 500; }
.rail {
  position: fixed;
  z-index: 20;
  right: 24px;
  top: 50%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translateY(-50%);
}
.rail button {
  width: 4px;
  height: 4px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--edge);
  cursor: pointer;
  transition: height .3s ease, background .3s ease, box-shadow .3s ease;
}
.rail button.active { height: 22px; border-radius: 2px; background: var(--signal); box-shadow: 0 0 8px rgba(0,217,146,.5); }

.slide {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 100svh;
  height: 100svh;
  padding: clamp(76px, 10vh, 116px) var(--side) clamp(58px, 8vh, 86px);
  overflow: hidden;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  isolation: isolate;
}
.slide::after {
  content: "";
  position: absolute;
  left: var(--side);
  right: var(--side);
  bottom: 30px;
  border-top: 1px solid rgba(0,217,146,.2);
  box-shadow: 0 -7px 24px rgba(0,217,146,.07), 0 -34px 96px rgba(0,217,146,.045);
  opacity: .58;
  z-index: -1;
}
.slide.is-active::after { animation: floor-glow 5.5s ease-in-out infinite; }
@keyframes floor-glow {
  50% {
    opacity: .92;
    box-shadow: 0 -9px 30px rgba(0,217,146,.11), 0 -42px 120px rgba(0,217,146,.07);
  }
}
.slide-meta {
  position: absolute;
  left: var(--side);
  top: clamp(68px, 9vh, 94px);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .1em;
}
.slide h1, .slide h2, .slide h3 { margin: 0; font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; }
.slide h1, .slide h2 {
  font-weight: 540;
  line-height: 1.02;
  letter-spacing: -.055em;
}
.slide h1 { font-size: clamp(46px, 6.55vw, 112px); }
.slide h2 { font-size: clamp(42px, 5.3vw, 88px); }
.slide h1 span, .slide h2 span { color: var(--signal); }
.heading-group { align-self: center; max-width: 1160px; }
.lead-copy {
  max-width: 760px;
  margin: clamp(18px, 2.7vh, 28px) 0 0;
  color: var(--paper);
  font-size: clamp(14px, 1.08vw, 17px);
  line-height: 1.78;
  letter-spacing: .01em;
}
.slide-note { margin: 0; color: var(--slate); font-size: clamp(13px, 1.2vw, 18px); }
.footer-code { margin: 0; color: var(--slate); font-size: 11px; letter-spacing: .08em; }

.chapter-slide { align-content: center; }
.chapter-kicker {
  position: absolute;
  top: clamp(78px, 10vh, 108px);
  left: var(--side);
  color: var(--signal);
  font-size: 12px;
  letter-spacing: .14em;
}
.chapter-number {
  position: absolute;
  right: var(--side);
  top: 50%;
  color: rgba(242,242,242,.035);
  font-size: clamp(180px, 28vw, 430px);
  font-weight: 650;
  line-height: .72;
  letter-spacing: -.12em;
  transform: translateY(-42%);
  opacity: 0;
  transition: opacity 1s ease, transform 1.2s cubic-bezier(.2,.75,.15,1);
  user-select: none;
  z-index: -1;
}
.chapter-slide.is-active .chapter-number { opacity: 1; transform: translateY(-50%); }
.chapter-copy { position: relative; max-width: 980px; }
.chapter-copy h3 {
  margin: 0;
  max-width: 980px;
  font-size: clamp(48px, 6.6vw, 108px);
  font-weight: 540;
  line-height: 1.04;
  letter-spacing: -.05em;
}
.chapter-copy p {
  max-width: 700px;
  margin: 30px 0 0;
  color: var(--paper);
  font-size: clamp(16px, 1.35vw, 21px);
  line-height: 1.7;
}
.chapter-map {
  position: absolute;
  left: var(--side);
  right: var(--side);
  bottom: clamp(70px, 9vh, 92px);
  display: flex;
  flex-wrap: wrap;
  gap: 18px 44px;
  padding-top: 20px;
  border-top: 1px solid var(--edge);
}
.chapter-map span { color: var(--slate); font-size: 12px; }
.chapter-map b { margin-right: 10px; color: var(--signal); font-size: 9px; font-weight: 400; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .7s cubic-bezier(.2,.75,.15,1); }
.is-active .reveal { opacity: 1; transform: translateY(0); }
.is-active .delay-1 { transition-delay: .12s; }
.is-active .delay-2 { transition-delay: .25s; }
.is-active .delay-3 { transition-delay: .42s; }

.hero { grid-template-rows: auto 1fr auto; align-content: stretch; gap: 0; }
.hero-copy { max-width: 1380px; margin-top: clamp(90px, 15vh, 140px); }
.hero h1 { font-size: clamp(46px, 6.9vw, 110px); }
.hero h1 span { display: inline-block; margin-left: .12em; white-space: nowrap; }
.hero-copy .lead-copy { max-width: 820px; color: var(--slate); }
.hero-line { width: 100%; align-self: end; margin-bottom: clamp(70px, 10vh, 100px); }
.hero .footer-code { padding-bottom: 4px; }

.stage-line {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  min-height: 72px;
}
.stage-track {
  position: absolute;
  top: 12px;
  left: 2px;
  right: 2px;
  border-top: 1px solid var(--signal);
  box-shadow: 0 0 8px rgba(0,217,146,.24);
}
.signal-packet {
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 5px var(--signal), 0 0 16px rgba(0,217,146,.8);
  animation: signal-travel 5.8s cubic-bezier(.42,0,.58,1) infinite;
}
.stage-node { position: relative; padding-top: 28px; color: var(--paper); font-size: clamp(12px, 1.05vw, 16px); }
.stage-node:not(:first-of-type) { text-align: center; }
.stage-node:last-child { text-align: right; }
.stage-node b { font-weight: 450; }
.stage-node small { display: block; margin-top: 5px; color: var(--slate); font-size: 10px; font-weight: 400; }
.stage-tick { position: absolute; top: 7px; left: 0; height: 11px; border-left: 1px solid var(--signal); }
.stage-node:not(:first-of-type) .stage-tick { left: 50%; }
.stage-node:last-child .stage-tick { left: auto; right: 0; }
@keyframes signal-travel { 0% { left: 0; opacity: .15; } 8% { opacity: 1; } 88% { opacity: 1; } 100% { left: calc(100% - 8px); opacity: .1; } }

.statement { grid-template-columns: minmax(0, 1.4fr) minmax(300px, .6fr); grid-template-rows: 1fr auto; gap: 40px 8vw; align-items: center; }
.statement h2 { max-width: 970px; }
.three-lines { display: grid; gap: 22px; align-self: center; }
.three-lines p { margin: 0; padding-bottom: 16px; border-bottom: 1px solid var(--edge); color: var(--paper); font-size: clamp(15px, 1.35vw, 20px); }
.three-lines i { margin-right: 20px; color: var(--signal); font-family: "SFMono-Regular", Consolas, monospace; font-size: 11px; font-style: normal; }
.statement .slide-note { grid-column: 1 / -1; }

.process { align-content: center; gap: 9vh; }
.process h2 { max-width: 1020px; }
.traditional-flow { position: relative; padding: 20px 0 90px; }
.return-loop { position: absolute; left: 8.5%; right: 8.5%; bottom: 0; height: 44px; border-right: 1px dashed var(--slate); border-bottom: 1px dashed var(--slate); border-left: 1px dashed var(--slate); color: var(--slate); text-align: center; }
.return-loop span { position: relative; top: 31px; padding: 0 18px; background: var(--ink); font-size: 11px; letter-spacing: .04em; }

.roots { align-content: center; gap: 9vh; }
.roots h2 { max-width: 1150px; }
.root-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.root-grid div { display: flex; min-height: 104px; padding: 22px 20px; align-items: end; gap: 16px; border-right: 1px solid var(--edge); }
.root-grid div:last-child { border-right: 0; }
.root-grid b { color: var(--signal); font-size: 10px; font-weight: 400; }
.root-grid span { font-size: clamp(17px, 1.5vw, 24px); }

.metrics { grid-template-columns: 1fr 1.15fr; grid-template-rows: 1fr auto; align-items: center; gap: 6vw; }
.metrics h2 { max-width: 720px; }
.metric-pair { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 4vw, 64px); }
.metric-pair strong { color: var(--signal); font-size: clamp(58px, 7vw, 116px); font-weight: 420; letter-spacing: -.07em; }
.metric-pair em { font-size: .35em; font-style: normal; }
.metric-pair p { margin: 10px 0 8px; color: var(--paper); font-size: 16px; }
.metric-pair small { color: var(--slate); font-size: 10px; }
.metrics .slide-note { grid-column: 1 / -1; }

.contract { grid-template-columns: minmax(0, 1.1fr) minmax(330px, .7fr); align-items: center; gap: 8vw; }
.contract-copy h2 { font-size: clamp(42px, 5vw, 82px); }
.contract-copy p { margin: 34px 0 0; color: var(--paper); font-size: clamp(14px, 1.3vw, 19px); }
.contract-copy p { max-width: 760px; line-height: 1.75; }
.terminal { position: relative; display: grid; gap: clamp(15px, 2.8vh, 28px); padding: clamp(28px, 4vw, 58px); border: 1px solid var(--edge); border-left: 2px solid var(--signal); background: var(--carbon); border-radius: 6px; }
.terminal code { color: var(--snow); font-family: "SFMono-Regular", Consolas, monospace; font-size: clamp(12px, 1.25vw, 18px); }
.cursor { width: 8px; height: 18px; background: var(--signal); box-shadow: 0 0 8px rgba(0,217,146,.7); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.ownership { align-content: center; gap: 10vh; }
.ownership h2 { max-width: 1100px; }
.ownership-strip { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--edge); }
.ownership-strip div { display: grid; padding: 22px 18px 0 0; gap: 14px; }
.ownership-strip b { color: var(--signal); font-size: 10px; font-weight: 400; }
.ownership-strip strong { font-size: clamp(20px, 2vw, 30px); font-weight: 500; }
.ownership-strip small { color: var(--slate); font-size: 12px; }

.control { align-content: center; gap: 8vh; }
.control h2 { max-width: 900px; }
.three-beat { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); padding: 24px 0 38px; }
.three-beat > div:not(.beat-line) { position: relative; z-index: 2; }
.three-beat > div:nth-child(2) { text-align: center; }
.three-beat > div:nth-child(3) { text-align: right; }
.three-beat strong { display: block; font-size: clamp(25px, 3.1vw, 52px); font-weight: 580; letter-spacing: -.04em; }
.three-beat small { display: block; margin-top: 13px; color: var(--paper); font-size: 13px; }
.beat-line { position: absolute; left: 12%; right: 12%; top: 42px; border-top: 1px solid var(--signal); z-index: 1; }
.control .footer-code { text-align: center; }

.role-slide { grid-template-columns: minmax(360px, .8fr) minmax(520px, 1.2fr); align-items: center; gap: 8vw; }
.role-slide h2 { font-size: clamp(40px, 4.7vw, 76px); }
.role-selector { display: grid; grid-template-columns: 150px 1fr; min-height: 390px; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.role-tabs { display: grid; border-right: 1px solid var(--edge); }
.role-tabs button { display: flex; align-items: center; gap: 14px; padding: 0 18px; border: 0; border-bottom: 1px solid var(--edge); color: var(--slate); background: transparent; text-align: left; cursor: pointer; }
.role-tabs button:last-child { border-bottom: 0; }
.role-tabs button span { width: 40px; font-size: 9px; }
.role-tabs button.active { color: var(--snow); box-shadow: inset 2px 0 var(--signal); background: var(--carbon); }
.role-detail { display: flex; flex-direction: column; justify-content: center; padding: clamp(28px, 4vw, 64px); }
.role-detail > span { color: var(--signal); font-size: 10px; }
.role-detail h3 { margin-top: 30px; font-size: clamp(28px, 3vw, 48px); font-weight: 500; }
.role-detail p { max-width: 560px; margin: 22px 0 46px; color: var(--paper); font-size: clamp(14px, 1.25vw, 18px); line-height: 1.7; }
.role-detail small { color: var(--slate); font-family: "SFMono-Regular", Consolas, monospace; font-size: 10px; }

.compare { align-content: center; gap: 9vh; }
.compare h2 { max-width: 1040px; }
.compare-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 5vw; }
.compare-row > div:not(.compare-arrow) { padding: 26px 0; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.compare-row small { color: var(--signal); font-size: 10px; }
.compare-row strong { display: block; margin: 28px 0 12px; font-size: clamp(22px, 2.8vw, 44px); font-weight: 500; }
.compare-row p { margin: 0; color: var(--slate); font-size: 13px; }
.compare-arrow { color: var(--signal); font-size: 28px; }

.split { align-content: center; gap: 8vh; }
.split h2 { max-width: 1100px; }
.split-proof { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.split-proof div { padding: clamp(26px, 4vw, 58px) 0; }
.split-proof div:first-child { padding-right: 5vw; border-right: 1px solid var(--edge); }
.split-proof div:last-child { padding-left: 5vw; }
.split-proof span { color: var(--signal); font-size: 10px; }
.split-proof strong { display: block; margin: 24px 0 16px; font-size: clamp(23px, 2.8vw, 44px); font-weight: 500; }
.split-proof p { margin: 0; color: var(--slate); font-size: 13px; }

.gates { align-content: center; gap: 8vh; }
.gates h2 { max-width: 1080px; }
.gate-line { padding-top: 20px; }
.gates .slide-note { text-align: center; }

.boundary { align-content: center; gap: 7vh; }
.boundary h2 { max-width: 950px; }
.boundary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8vw; }
.boundary-grid div { padding-top: 24px; border-top: 1px solid var(--edge); }
.boundary-grid small { color: var(--signal); font-size: 10px; }
.boundary-grid strong { display: block; margin: 25px 0 18px; font-size: clamp(22px, 2.4vw, 38px); font-weight: 500; }
.boundary-grid p { max-width: 590px; margin: 0; color: var(--slate); font-size: 13px; line-height: 1.7; }

.poc { align-content: center; gap: 10vh; }
.poc h2 { max-width: 1140px; }
.poc-road { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); padding-top: 34px; }
.poc-road div:not(.road-track) { position: relative; z-index: 2; display: grid; gap: 14px; }
.poc-road div:not(.road-track):not(:first-child) { text-align: center; }
.poc-road div:nth-child(6) { text-align: right !important; }
.poc-road b { color: var(--signal); font-size: 11px; font-weight: 400; }
.poc-road span { color: var(--paper); font-size: clamp(11px, 1vw, 15px); }
.road-track { position: absolute; left: 0; right: 0; top: 0; border-top: 1px solid var(--signal); }

.finale { align-content: center; gap: 5.5vh; }
.finale h2 { max-width: 1180px; }
.target-row { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.target-row div { padding: 22px 18px 20px 0; }
.target-row strong { display: block; color: var(--signal); font-size: clamp(26px, 3vw, 48px); font-weight: 450; letter-spacing: -.05em; }
.target-row small { display: block; margin-top: 8px; color: var(--slate); font-size: 11px; }
.ask-line { display: flex; flex-wrap: wrap; gap: 12px 34px; color: var(--paper); font-size: 12px; }
.ask-line span::before { content: "↳"; margin-right: 9px; color: var(--signal); }
.restart { justify-self: start; padding: 11px 15px; border: 1px solid var(--edge); border-radius: 6px; color: var(--signal-soft); background: var(--carbon); font-size: 10px; cursor: pointer; transition: border-color .2s ease, box-shadow .2s ease; }
.restart:hover, .restart:focus-visible { border-color: var(--signal); box-shadow: 0 0 12px rgba(0,217,146,.16); outline: 0; }

/* Document-aligned roadshow chapters */
.feasibility, .premises, .source-model, .artifacts, .buildspec, .knowledge,
.swimlane, .gate-detail, .acceptance, .evidence, .risk, .extension, .closing {
  align-content: center;
  gap: clamp(34px, 5.5vh, 62px);
}
.feasibility h2, .premises h2, .source-model h2, .artifacts h2, .buildspec h2,
.knowledge h2, .swimlane h2, .gate-detail h2, .acceptance h2, .evidence h2,
.risk h2, .extension h2, .closing h2 { font-size: clamp(38px, 4.45vw, 74px); }

.feasibility-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
}
.feasibility-matrix div { position: relative; min-height: 168px; padding: 24px 22px 22px 0; border-right: 1px solid var(--edge); }
.feasibility-matrix div:not(:first-child) { padding-left: 22px; }
.feasibility-matrix div:last-child { border-right: 0; }
.feasibility-matrix b { color: var(--signal); font-size: 10px; font-weight: 400; }
.feasibility-matrix strong { display: block; margin: 22px 0 10px; font-size: clamp(18px, 1.65vw, 27px); font-weight: 500; }
.feasibility-matrix em { position: absolute; top: 24px; right: 20px; color: var(--paper); font-size: 11px; font-style: normal; }
.feasibility-matrix p { margin: 0; color: var(--slate); font-size: 12px; line-height: 1.65; }

.premise-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--edge); }
.premise-grid div { min-height: 150px; padding: 22px 4vw 20px 0; border-right: 1px solid var(--edge); }
.premise-grid div:not(:first-child) { padding-left: 3vw; }
.premise-grid div:last-child { border-right: 0; }
.premise-grid b { color: var(--signal); font: 400 10px "SFMono-Regular", Consolas, monospace; }
.premise-grid strong { display: block; margin: 19px 0 10px; font-size: clamp(18px, 1.7vw, 28px); font-weight: 500; }
.premise-grid p { margin: 0; color: var(--slate); font-size: 12px; line-height: 1.65; }
.baseline-strip { display: flex; flex-wrap: wrap; gap: 12px 44px; padding-top: 17px; border-top: 1px solid rgba(61,58,57,.65); color: var(--slate); font-size: 11px; }
.baseline-strip b { margin-right: 8px; color: var(--paper); font-weight: 500; }

.source-merge { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--edge); }
.source-merge > div { min-height: 156px; padding: 24px 3vw 22px 0; border-right: 1px solid var(--edge); }
.source-merge > div:nth-child(2), .source-merge > div:nth-child(3) { padding-left: 3vw; }
.source-merge small, .source-merge > div > span { color: var(--signal); font-size: 10px; }
.source-merge strong { display: block; margin: 22px 0 12px; font-size: clamp(24px, 2.35vw, 38px); font-weight: 500; }
.source-merge p { margin: 0; color: var(--slate); font-size: 12px; line-height: 1.65; }
.source-merge .merge-output { grid-column: 1 / -1; display: grid; grid-template-columns: 130px 1fr 1.2fr; align-items: center; min-height: 92px; padding: 18px 0; border-top: 1px solid var(--signal); border-right: 0; box-shadow: 0 -12px 40px rgba(0,217,146,.04); }
.source-merge .merge-output strong { margin: 0; color: var(--signal); }

.artifacts { gap: clamp(28px, 4.5vh, 52px); }
.artifact-chain { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); padding-top: 18px; border-top: 1px solid var(--signal); }
.artifact-chain div { position: relative; min-height: 138px; padding: 20px 22px 0 0; border-right: 1px solid var(--edge); z-index: 1; }
.artifact-chain div:not(:first-child) { padding-left: 20px; }
.artifact-chain div:last-of-type { border-right: 0; }
.artifact-chain b { color: var(--signal); font-size: 9px; font-weight: 400; }
.artifact-chain strong { display: block; margin: 18px 0 10px; font-size: clamp(13px, 1.15vw, 18px); font-weight: 500; overflow-wrap: anywhere; }
.artifact-chain p { margin: 0; color: var(--slate); font-size: 10px; line-height: 1.55; }
.chain-pulse { position: absolute; top: -4px; left: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 18px var(--signal); animation: signal-travel 6s linear infinite; }

.spec-fields { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.spec-fields div { display: grid; grid-template-columns: 120px 1fr; align-items: center; min-height: 66px; border-bottom: 1px solid rgba(61,58,57,.7); }
.spec-fields div:nth-last-child(-n+2) { border-bottom: 0; }
.spec-fields div:nth-child(odd) { padding-right: 3vw; border-right: 1px solid var(--edge); }
.spec-fields div:nth-child(even) { padding-left: 3vw; }
.spec-fields code { color: var(--signal); font-size: 10px; }
.spec-fields span { color: var(--paper); font-size: 13px; }

.priority-flow { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); padding-top: 30px; }
.priority-flow > div { position: relative; z-index: 2; }
.priority-flow > div:not(:first-child) { text-align: center; }
.priority-flow > div:last-of-type { text-align: right; }
.priority-flow b { display: block; color: var(--signal); font-size: 9px; font-weight: 400; }
.priority-flow strong { display: block; margin-top: 14px; color: var(--paper); font-size: clamp(13px, 1.25vw, 18px); font-weight: 500; }
.priority-track { position: absolute; top: 7px; left: 0; right: 0; border-top: 1px solid var(--signal); }
.priority-track i { position: absolute; top: -4px; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 16px var(--signal); animation: signal-travel 5.2s ease-in-out infinite; }
.knowledge-note { display: flex; flex-wrap: wrap; gap: 12px 32px; padding-top: 18px; border-top: 1px solid var(--edge); color: var(--slate); font-size: 11px; }
.knowledge-note span::before { content: "·"; margin-right: 8px; color: var(--signal); }

.swimlane { gap: clamp(24px, 3.2vh, 38px); }
.swimlane .heading-group { display: grid; grid-template-columns: minmax(480px, 1.1fr) minmax(340px, .7fr); align-items: end; gap: 5vw; max-width: none; }
.swimlane .lead-copy { margin: 0; }
.lane-board { position: relative; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.lane { position: relative; display: grid; grid-template-columns: 120px repeat(5, minmax(88px, 1fr)); align-items: center; min-height: 74px; border-bottom: 1px solid rgba(61,58,57,.72); }
.lane:last-of-type { border-bottom: 0; }
.lane::before {
  content: "";
  position: absolute;
  left: 120px;
  right: 18px;
  top: 50%;
  height: 1px;
  z-index: 0;
  background-image:
    linear-gradient(90deg, rgba(0,217,146,.26), rgba(0,217,146,.26)),
    linear-gradient(90deg, transparent 0%, rgba(0,217,146,.12) 18%, var(--signal) 50%, rgba(0,217,146,.12) 82%, transparent 100%);
  background-position: 0 0, -180px 0;
  background-repeat: no-repeat;
  background-size: 100% 1px, 180px 1px;
  box-shadow: 0 0 8px rgba(0,217,146,.08);
  animation: lane-flow 4.8s linear infinite;
}
.lane:nth-of-type(even)::before { animation-direction: reverse; }
.lane:not(:last-of-type)::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 1px;
  height: 74px;
  z-index: 0;
  background: rgba(0,217,146,.26);
  box-shadow: 0 0 8px rgba(0,217,146,.06);
}
.lane:nth-of-type(odd):not(:last-of-type)::after { right: 18px; }
.lane:nth-of-type(even):not(:last-of-type)::after { left: 120px; }
.lane > b { position: relative; z-index: 2; color: var(--paper); font-size: 12px; font-weight: 500; }
.lane > span, .lane > i, .lane > em { justify-self: center; position: relative; padding: 8px 10px; color: var(--paper); background: var(--ink); font-size: 10px; font-style: normal; text-align: center; z-index: 2; }
.lane > span { border-bottom: 1px solid var(--edge); }
.lane > i { width: 36px; height: 28px; padding: 7px 0; border: 1px solid rgba(0,217,146,.75); border-radius: 3px; color: var(--signal); }
.lane > em { color: #c77f87; }
.lane .lane-focus { color: var(--signal); border-color: var(--signal); box-shadow: 0 8px 24px rgba(0,217,146,.08); }
@keyframes lane-flow {
  from { background-position: 0 0, -180px 0; }
  to { background-position: 0 0, calc(100% + 180px) 0; }
}

.gate-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.gate-grid div { min-height: 118px; padding: 18px 22px 18px 0; border-right: 1px solid var(--edge); border-bottom: 1px solid rgba(61,58,57,.72); }
.gate-grid div:nth-child(3n+2), .gate-grid div:nth-child(3n+3) { padding-left: 22px; }
.gate-grid div:nth-child(3n) { border-right: 0; }
.gate-grid div:nth-last-child(-n+3) { border-bottom: 0; }
.gate-grid b { color: var(--signal); font-size: 10px; font-weight: 400; }
.gate-grid strong { margin-left: 14px; font-size: 17px; font-weight: 500; }
.gate-grid p { margin: 17px 0 8px; color: var(--paper); font-size: 12px; }
.gate-grid small { color: #c77f87; font: 400 9px "SFMono-Regular", Consolas, monospace; }

.acceptance-stack { display: grid; gap: 0; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.acceptance-stack div { display: grid; grid-template-columns: 56px 190px 1fr 180px; align-items: center; min-height: 76px; border-bottom: 1px solid rgba(61,58,57,.72); }
.acceptance-stack div:last-child { border-bottom: 0; }
.acceptance-stack b { color: var(--signal); font: 400 10px "SFMono-Regular", Consolas, monospace; }
.acceptance-stack strong { font-size: clamp(18px, 1.7vw, 27px); font-weight: 500; }
.acceptance-stack p { margin: 0; color: var(--paper); font-size: 12px; }
.acceptance-stack span { justify-self: end; color: var(--slate); font-size: 11px; }
.scope-line { display: grid; grid-template-columns: auto 1fr auto auto 1fr; align-items: center; gap: 18px; padding-top: 17px; border-top: 1px solid rgba(61,58,57,.6); }
.scope-line span { color: var(--signal); font-size: 9px; }
.scope-line strong { color: var(--paper); font-size: 13px; font-weight: 500; }
.scope-line i { color: var(--signal); font-style: normal; }

.poc { gap: clamp(24px, 3.8vh, 44px); }
.poc h2 { font-size: clamp(38px, 4.45vw, 74px); }
.poc-road { padding-top: 26px; }
.poc-road div:not(.road-track) { display: block; padding: 0 14px; }
.poc-road div:not(.road-track):first-child { padding-left: 0; }
.poc-road div:not(.road-track):last-of-type { padding-right: 0; }
.poc-road strong { display: block; margin: 14px 0 9px; color: var(--paper); font-size: clamp(13px, 1.2vw, 18px); font-weight: 500; }
.poc-road p { margin: 0; color: var(--slate); font-size: 9px; line-height: 1.55; }
.road-track i { position: absolute; top: -4px; width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 16px var(--signal); animation: signal-travel 6.2s linear infinite; }
.parallel-track { margin: 0; padding-top: 14px; border-top: 1px solid rgba(61,58,57,.65); color: var(--slate); font-size: 11px; }
.parallel-track b { margin-right: 12px; color: var(--signal); font-weight: 400; }

.evidence { gap: clamp(30px, 4.8vh, 52px); }
.evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--edge); }
.evidence-grid span { padding-top: 16px; color: var(--slate); font-size: 11px; }
.evidence-grid b { display: block; margin-bottom: 8px; color: var(--paper); font: 500 10px "SFMono-Regular", Consolas, monospace; }

.risk-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.risk-grid div { min-height: 118px; padding: 18px 3vw 16px 0; border-right: 1px solid var(--edge); border-bottom: 1px solid rgba(61,58,57,.72); }
.risk-grid div:nth-child(even) { padding-left: 3vw; border-right: 0; }
.risk-grid div:nth-last-child(-n+2) { border-bottom: 0; }
.risk-grid b { color: var(--signal); font: 400 9px "SFMono-Regular", Consolas, monospace; }
.risk-grid strong { display: block; margin: 12px 0 8px; font-size: clamp(16px, 1.45vw, 23px); font-weight: 500; }
.risk-grid p { margin: 0; color: var(--slate); font-size: 11px; line-height: 1.6; }
.owner-line { display: flex; flex-wrap: wrap; gap: 10px 28px; padding-top: 14px; border-top: 1px solid rgba(61,58,57,.6); }
.owner-line span { color: var(--signal); font-size: 9px; }
.owner-line b { color: var(--paper); font-size: 11px; font-weight: 400; }

.extension-flow { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.extension-flow div { padding: 22px 4vw 22px 0; }
.extension-flow div:last-child { padding-left: 4vw; border-left: 1px solid var(--edge); }
.extension-flow small { color: var(--signal); font-size: 9px; }
.extension-flow strong { display: block; margin: 17px 0 9px; font-size: clamp(20px, 2vw, 32px); font-weight: 500; }
.extension-flow p { margin: 0; color: var(--slate); font-size: 11px; line-height: 1.6; }
.final-ask { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; color: var(--paper); font-size: 11px; }
.final-ask strong { color: var(--signal); font-size: 13px; font-weight: 500; }
.final-ask span::before { content: "↳"; margin-right: 8px; color: var(--signal); }

.closing { gap: clamp(28px, 4.4vh, 50px); }
.closing .heading-group { max-width: 1180px; }
.closing-summary { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.closing-summary div { min-height: 154px; padding: 22px 2.5vw 20px 0; border-right: 1px solid var(--edge); }
.closing-summary div:not(:first-child) { padding-left: 2.5vw; }
.closing-summary div:last-child { border-right: 0; }
.closing-summary b { color: var(--signal); font-size: 9px; font-weight: 400; }
.closing-summary strong { display: block; margin: 18px 0 10px; font-size: clamp(17px, 1.55vw, 25px); font-weight: 500; }
.closing-summary p { margin: 0; color: var(--slate); font-size: 11px; line-height: 1.6; }
.closing-line { display: grid; grid-template-columns: 1fr 1.3fr; align-items: center; gap: 4vw; padding-top: 15px; border-top: 1px solid rgba(61,58,57,.65); }
.closing-line span { color: var(--signal); font-size: 9px; }
.closing-line strong { color: var(--paper); font-size: clamp(13px, 1.15vw, 17px); font-weight: 500; text-align: right; }
.closing .restart { position: absolute; left: var(--side); bottom: clamp(58px, 7vh, 76px); }

@media (max-width: 900px) {
  :root { --side: 28px; }
  .rail { right: 9px; }
  .slide { padding-top: 82px; padding-bottom: 54px; }
  .statement, .metrics, .contract, .role-slide { grid-template-columns: 1fr; align-content: center; gap: 6vh; }
  .statement { grid-template-rows: auto auto auto; }
  .statement .slide-note, .metrics .slide-note { grid-column: auto; }
  .three-lines { gap: 12px; }
  .metric-pair { max-width: 680px; }
  .terminal { max-width: 680px; }
  .role-selector { min-height: 320px; }
  .feasibility-matrix { grid-template-columns: 1fr 1fr; }
  .feasibility-matrix div:nth-child(2) { border-right: 0; }
  .feasibility-matrix div:nth-child(-n+2) { border-bottom: 1px solid var(--edge); }
  .swimlane .heading-group { grid-template-columns: 1fr; gap: 14px; }
  .lane { grid-template-columns: 90px repeat(5, minmax(72px, 1fr)); }
  .lane::before { left: 90px; }
  .lane:nth-of-type(even):not(:last-of-type)::after { left: 90px; }
}

@media (max-width: 620px) {
  .brand { display: none; }
  .slide h1 { font-size: clamp(38px, 12vw, 64px); }
  .slide h2, .contract-copy h2, .role-slide h2 { font-size: clamp(34px, 10vw, 58px); }
  .stage-node { font-size: 10px; }
  .root-grid { grid-template-columns: 1fr 1fr; }
  .root-grid div:nth-child(2) { border-right: 0; }
  .root-grid div:nth-child(-n+2) { border-bottom: 1px solid var(--edge); }
  .ownership-strip { grid-template-columns: repeat(5, minmax(70px, 1fr)); overflow-x: auto; }
  .ownership-strip div { min-width: 82px; }
  .ownership-strip small { font-size: 9px; }
  .three-beat strong { font-size: clamp(16px, 5vw, 30px); }
  .role-selector { grid-template-columns: 92px 1fr; }
  .role-tabs button { padding: 0 10px; }
  .role-tabs button span { display: none; }
  .compare-row { gap: 14px; }
  .split-proof strong { font-size: 20px; }
  .boundary-grid { gap: 28px; }
  .poc-road span { writing-mode: vertical-rl; max-height: 100px; }
  .target-row { grid-template-columns: repeat(5, minmax(58px, 1fr)); }
  .target-row div { padding-right: 6px; }
  .target-row small { font-size: 8px; }
  .chapter-number { font-size: 52vw; }
  .chapter-copy h3 { font-size: clamp(40px, 12vw, 68px); }
  .chapter-map { gap: 12px 20px; }
  .premise-grid, .source-merge { grid-template-columns: 1fr; }
  .premise-grid div, .source-merge > div { min-height: auto; padding: 14px 0; border-right: 0; border-bottom: 1px solid var(--edge); }
  .premise-grid div:not(:first-child), .source-merge > div:nth-child(2), .source-merge > div:nth-child(3) { padding-left: 0; }
  .source-merge .merge-output { grid-template-columns: 1fr; gap: 8px; }
  .artifact-chain { grid-template-columns: repeat(3, 1fr); }
  .artifact-chain div { min-height: 110px; }
  .spec-fields, .gate-grid, .risk-grid { grid-template-columns: 1fr; }
  .spec-fields div, .spec-fields div:nth-child(odd), .spec-fields div:nth-child(even), .gate-grid div, .gate-grid div:nth-child(3n+2), .gate-grid div:nth-child(3n+3), .risk-grid div, .risk-grid div:nth-child(even) { padding-left: 0; padding-right: 0; border-right: 0; border-bottom: 1px solid var(--edge); }
  .lane-board { overflow-x: auto; }
  .lane { min-width: 760px; }
  .acceptance-stack div { grid-template-columns: 36px 120px 1fr; }
  .acceptance-stack span { display: none; }
  .scope-line { grid-template-columns: 1fr 1fr; }
  .scope-line i { display: none; }
  .poc-road p { display: none; }
  .evidence-grid { grid-template-columns: 1fr 1fr; }
  .extension-flow { grid-template-columns: 1fr; }
  .extension-flow div:last-child { padding-left: 0; border-left: 0; border-top: 1px solid var(--edge); }
  .closing-summary { grid-template-columns: 1fr 1fr; }
  .closing-summary div:nth-child(2) { border-right: 0; }
  .closing-summary div:nth-child(-n+2) { border-bottom: 1px solid var(--edge); }
  .closing-line { grid-template-columns: 1fr; }
  .closing-line strong { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  .deck { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .signal-packet, .cursor, .chain-pulse, .priority-track i, .road-track i, .slide.is-active::after, .lane::before { animation: none; }
  .cursor-glow { display: none; }
}

@media (hover: none), (pointer: coarse) {
  .cursor-glow { display: none; }
}