:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #16231e;
  background: #dfe2dc;
  --ink: #16231e;
  --forest: #10241e;
  --forest-soft: #193c31;
  --paper: #f4f3ee;
  --paper-bright: #fbfaf6;
  --muted: #647068;
  --line: #c8cdc7;
  --coral: #ff735c;
  --mint: #87d3b7;
}

* { box-sizing: border-box; }
html { height: 100%; }
body { height: 100%; margin: 0; min-width: 280px; overflow: hidden; background: #dfe2dc; }
button, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }
svg { display: block; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  transform: translateY(-180%);
  background: var(--paper-bright);
  color: var(--ink);
  padding: .7rem 1rem;
  font-size: .82rem;
  font-weight: 750;
  text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

.recipient-shell { height: 100svh; overflow: hidden; }
.viewer-bar {
  position: relative;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(14rem, 1.25fr) minmax(10rem, 1fr);
  align-items: center;
  min-height: 64px;
  border-bottom: 1px solid #d2d5d0;
  background: rgba(248, 247, 242, .96);
  padding: .65rem clamp(.75rem, 2vw, 1.75rem);
  backdrop-filter: blur(18px);
}

.microvault-mark {
  display: inline-flex;
  width: max-content;
  align-items: center;
  gap: .65rem;
  color: var(--ink);
  font-size: .83rem;
  font-weight: 760;
  text-decoration: none;
}
.microvault-mark svg {
  width: 29px;
  height: 29px;
  border-radius: 6px;
  background: var(--forest);
  padding: 6px;
  fill: none;
  stroke: white;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.delivery-identity { min-width: 0; text-align: center; }
.delivery-identity span,
.delivery-identity strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.delivery-identity span { color: #738078; font-size: .63rem; font-weight: 780; letter-spacing: .13em; text-transform: uppercase; }
.delivery-identity strong { margin-top: .14rem; font-size: .78rem; }

.viewer-actions { display: flex; justify-content: flex-end; gap: .45rem; }
.viewer-button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  border: 1px solid #c9cec8;
  background: transparent;
  padding: .55rem .7rem;
  font-size: .72rem;
  font-weight: 720;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, color .18s ease, transform .18s ease;
}
.viewer-button:hover { border-color: #8b978f; background: #fff; transform: translateY(-1px); }
.viewer-button svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.exit-icon { display: none; }
body.presentation-mode .enter-icon { display: none; }
body.presentation-mode .exit-icon { display: block; }

.reading-progress { position: fixed; left: 0; right: 0; top: 63px; z-index: 55; height: 2px; pointer-events: none; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--coral); transition: width .08s linear; }

main { position: relative; height: calc(100svh - 64px); margin: 0 auto; max-width: 1680px; overflow: hidden; background: var(--paper); box-shadow: 0 26px 90px rgba(18, 32, 26, .16); }
.report { height: 100%; overflow: hidden; }
.slide-track {
  display: flex;
  width: 100%;
  height: 100%;
  transform: translate3d(0, 0, 0);
  transition: transform .68s cubic-bezier(.22, 1, .36, 1);
  will-change: transform;
}
.slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: rgba(22, 35, 30, .3) transparent;
  scrollbar-width: thin;
}
.cover {
  position: relative;
  display: grid;
  min-height: 100%;
  grid-template-columns: minmax(0, .8fr) minmax(28rem, 1.2fr);
  grid-template-rows: 1fr auto;
  overflow: hidden;
  background: var(--forest);
  color: white;
  padding: clamp(2rem, 5vw, 5.5rem) clamp(1.25rem, 6vw, 6.5rem) clamp(1.25rem, 3vw, 2.25rem);
}
.cover-grid {
  position: absolute;
  inset: 0;
  opacity: .16;
  background-image: linear-gradient(rgba(255,255,255,.17) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.17) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(90deg, transparent 5%, black 55%, black 100%);
}
.cover::after {
  content: "";
  position: absolute;
  right: -7%;
  top: -13%;
  width: min(32vw, 31rem);
  aspect-ratio: 1;
  transform: rotate(17deg);
  background: var(--coral);
}
.cover-copy { position: relative; z-index: 2; align-self: center; max-width: 42rem; padding-block: 2rem; }
.cover-brand { display: flex; align-items: center; gap: .7rem; margin: 0 0 clamp(3rem, 7vw, 7rem); font-size: .78rem; font-weight: 780; letter-spacing: .03em; }
.northstar-symbol { display: inline-grid; width: 30px; height: 30px; place-items: center; border: 1px solid currentColor; font-size: .72rem; font-weight: 850; }
.northstar-symbol.inverted { background: var(--paper); color: var(--forest); }
.eyebrow { margin: 0 0 .9rem; color: #537067; font-size: .68rem; font-weight: 820; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow.light { color: var(--mint); }
.cover h1 { max-width: 7.2ch; margin: 0; font-size: clamp(4rem, 9.6vw, 9.6rem); font-weight: 660; letter-spacing: -.065em; line-height: .82; }
.cover-summary { max-width: 36ch; margin: 2rem 0 0; color: rgba(255,255,255,.68); font-size: clamp(1rem, 1.55vw, 1.38rem); line-height: 1.48; }

.cover-visual { position: relative; z-index: 1; align-self: center; min-width: 0; }
.cover-visual svg { width: min(54vw, 47rem); margin-left: auto; overflow: visible; }
.orbit { fill: none; stroke: rgba(255,255,255,.16); stroke-width: 1; }
.orbit-2 { stroke-dasharray: 5 7; }
.orbit-3 { stroke: rgba(135,211,183,.35); }
.signal-path { fill: none; stroke: var(--mint); stroke-linecap: round; stroke-width: 5; filter: drop-shadow(0 7px 18px rgba(135,211,183,.2)); }
.signal-points circle { fill: var(--forest); stroke: var(--mint); stroke-width: 4; }
.signal-points .signal-end { fill: var(--coral); stroke: #fff; }
.axis-line { stroke: rgba(255,255,255,.28); }
.axis-label { fill: rgba(255,255,255,.45); font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.target-annotation { position: absolute; right: 5%; top: 23%; border-left: 1px solid rgba(255,255,255,.45); padding-left: 1rem; }
.target-annotation span, .target-annotation strong { display: block; }
.target-annotation span { color: rgba(255,255,255,.62); font-size: .62rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.target-annotation strong { margin-top: .2rem; font-size: clamp(1.7rem, 3vw, 3rem); }

.cover-meta {
  position: relative;
  z-index: 3;
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  border-top: 1px solid rgba(255,255,255,.22);
  padding-top: 1.2rem;
}
.cover-meta > div { min-width: 0; padding-right: 1rem; }
.cover-meta span, .cover-meta strong { display: block; }
.cover-meta span { color: rgba(255,255,255,.48); font-size: .59rem; font-weight: 760; letter-spacing: .11em; text-transform: uppercase; }
.cover-meta strong { margin-top: .28rem; overflow: hidden; font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
.reveal { opacity: 0; transform: translateY(18px); }
body.is-ready .reveal { opacity: 1; transform: translateY(0); transition: opacity .72s cubic-bezier(.22,1,.36,1), transform .72s cubic-bezier(.22,1,.36,1); }
body.is-ready .reveal-2 { transition-delay: .13s; }
body.is-ready .reveal-3 { transition-delay: .26s; }
.signal-path { stroke-dasharray: 900; stroke-dashoffset: 900; }
body.is-ready .signal-path { stroke-dashoffset: 0; transition: stroke-dashoffset 1.35s .35s cubic-bezier(.22,1,.36,1); }

.chapter { position: relative; padding: clamp(2.2rem, 3.6vw, 3.6rem) clamp(1.25rem, 7vw, 7.5rem) 4.75rem; }
.chapter-index { position: absolute; right: clamp(1.25rem, 7vw, 7.5rem); top: clamp(2.2rem, 3.6vw, 3.6rem); color: #a4aca6; font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.chapter-intro { max-width: 57rem; }
.chapter-intro h2,
.constraint h2,
.decision h2 { margin: 0; font-size: clamp(2.8rem, 6.4vw, 6.7rem); font-weight: 650; letter-spacing: -.06em; line-height: .88; }
.chapter-copy { display: grid; max-width: 76rem; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 8vw, 9rem); margin: clamp(1.8rem, 3vw, 2.75rem) 0 0 auto; }
.chapter-copy p { margin: 0; color: #4f5c54; font-size: clamp(.98rem, 1.4vw, 1.16rem); line-height: 1.72; }
.chapter-copy .lead { color: var(--ink); font-size: clamp(1.35rem, 2.5vw, 2.35rem); font-weight: 540; letter-spacing: -.035em; line-height: 1.28; }
.chapter-copy .fictional-note { align-self: end; color: #7d877f; font-size: .72rem; line-height: 1.5; }

.signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: clamp(2.2rem, 3.5vw, 3rem); border-block: 1px solid var(--line); }
.signal-strip article { min-width: 0; padding: clamp(1.1rem, 1.8vw, 1.7rem) clamp(.75rem, 2vw, 1.5rem); border-right: 1px solid var(--line); }
.signal-strip article:last-child { border-right: 0; }
.signal-strip span, .signal-strip strong, .signal-strip small { display: block; }
.signal-strip span { min-height: 2.2em; color: var(--muted); font-size: .7rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.signal-strip strong { margin-top: 1.2rem; font-size: clamp(2rem, 4.4vw, 4.8rem); font-weight: 650; letter-spacing: -.06em; line-height: .9; }
.signal-strip small { margin-top: .7rem; color: #6f7b73; font-size: .68rem; }

.momentum { background: var(--paper-bright); }
.wide-intro { max-width: 69rem; }
.performance-figure { display: grid; grid-template-columns: minmax(13rem, .35fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); margin: clamp(1.6rem, 2.7vw, 2.5rem) 0 0; }
.performance-figure figcaption span, .performance-figure figcaption strong { display: block; }
.performance-figure figcaption span { color: var(--muted); font-size: .7rem; font-weight: 760; letter-spacing: .1em; text-transform: uppercase; }
.performance-figure figcaption strong { max-width: 15ch; margin-top: .8rem; font-size: clamp(1.2rem, 2vw, 1.85rem); line-height: 1.25; }
.performance-chart { display: grid; min-height: clamp(17rem, 29vw, 24rem); grid-template-columns: 2.5rem 1fr; }
.chart-scale { display: flex; flex-direction: column; justify-content: space-between; padding: 0 .6rem 2rem 0; color: #929b95; font-size: .63rem; text-align: right; }
.bar-field { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1rem, 3vw, 3.2rem); align-items: stretch; border-bottom: 1px solid var(--ink); }
.grid-lines { position: absolute; inset: 0 0 2rem; background-image: linear-gradient(to bottom, var(--line) 1px, transparent 1px); background-size: 100% 20%; }
.bar-column { position: relative; z-index: 1; min-height: 100%; padding-bottom: 2rem; }
.bar { position: absolute; right: 0; bottom: 2rem; left: 0; display: block; height: var(--bar-height); min-height: 1px; background: var(--forest-soft); transform-origin: bottom; transition: transform .3s ease, background .3s ease; }
.bar-column:hover .bar { transform: scaleX(.92); background: #245c4b; }
.bar-column:nth-child(4) .bar { background: var(--coral); }
.bar-value { position: absolute; bottom: calc(2rem + var(--bar-height) + .65rem); left: 0; font-size: clamp(1rem, 2vw, 1.55rem); font-weight: 720; letter-spacing: -.03em; }
.bar-column small { position: absolute; right: 0; bottom: 0; left: 0; padding-top: .75rem; color: var(--muted); font-size: .65rem; font-weight: 780; letter-spacing: .13em; }
.momentum-note { display: grid; max-width: 60rem; grid-template-columns: auto 1fr; align-items: start; gap: clamp(1.5rem, 4vw, 4rem); margin: clamp(1.5rem, 2.5vw, 2rem) 0 0 auto; border-top: 1px solid var(--line); padding-top: 1.2rem; }
.note-number { color: var(--coral); font-size: clamp(4rem, 9vw, 9rem); font-weight: 650; letter-spacing: -.08em; line-height: .8; }
.momentum-note p { max-width: 33ch; margin: 0; font-size: clamp(1.25rem, 2.5vw, 2.3rem); letter-spacing: -.035em; line-height: 1.25; }

.constraint { display: grid; grid-template-columns: minmax(0, .8fr) minmax(28rem, 1.2fr); gap: clamp(3rem, 7vw, 8rem); align-items: center; background: var(--forest); color: white; padding: clamp(3rem, 6vw, 6rem) clamp(1.25rem, 7vw, 7.5rem) 6.5rem; }
.constraint-copy h2 { max-width: 9ch; }
.constraint-copy h2 span { display: block; color: var(--coral); font-size: 1.65em; line-height: .72; }
.constraint-copy > p:last-child { max-width: 39ch; margin: 2rem 0 0; color: rgba(255,255,255,.6); font-size: 1rem; line-height: 1.65; }
.funnel { display: grid; gap: .75rem; align-content: end; }
.funnel-stage { display: grid; grid-template-columns: 1fr auto; align-items: center; min-height: 4.4rem; border-top: 1px solid rgba(255,255,255,.25); padding: .8rem 1rem; }
.funnel-stage span { color: rgba(255,255,255,.62); font-size: .72rem; font-weight: 760; letter-spacing: .09em; text-transform: uppercase; }
.funnel-stage strong { font-size: clamp(1.7rem, 3vw, 3.1rem); font-weight: 650; letter-spacing: -.05em; }
.stage-1 { width: 100%; background: rgba(255,255,255,.06); }
.stage-2 { width: 78%; margin-left: auto; background: rgba(135,211,183,.1); }
.stage-3 { width: 55%; margin-left: auto; background: rgba(255,115,92,.16); }
.stage-4 { width: 35%; margin-left: auto; border-top-color: var(--coral); background: var(--coral); color: var(--forest); }
.stage-4 span { color: var(--forest); }

.scenario-section { background: #e5e7e1; }
.wide-intro > p:last-child { max-width: 46ch; margin: 1.6rem 0 0; color: var(--muted); line-height: 1.6; }
.scenario-layout { display: grid; grid-template-columns: minmax(12rem, .35fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 7rem); margin-top: clamp(2.5rem, 4.5vw, 4.5rem); }
.scenario-tabs { display: grid; align-content: start; border-top: 1px solid #a9b1ab; }
.scenario-tabs button { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border: 0; border-bottom: 1px solid #a9b1ab; background: transparent; padding: 1.25rem 0; color: #68736c; font-weight: 700; text-align: left; cursor: pointer; transition: color .2s ease, padding .2s ease; }
.scenario-tabs button small { color: #879089; font-size: .65rem; font-weight: 600; }
.scenario-tabs button[aria-selected="true"] { padding-left: 1rem; color: var(--ink); box-shadow: inset 3px 0 0 var(--coral); }
.scenario-tabs button:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
.scenario-panel { --runway: 79%; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid #a9b1ab; background: var(--paper-bright); }
.scenario-output { padding: clamp(1.2rem, 2.6vw, 2.4rem); border-right: 1px solid #d2d6d1; }
.scenario-output:nth-child(3) { border-right: 0; }
.scenario-output span, .scenario-output strong { display: block; }
.scenario-output span { min-height: 2.3em; color: var(--muted); font-size: .68rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.scenario-output strong { margin-top: 1rem; font-size: clamp(1.55rem, 3vw, 3rem); font-weight: 650; letter-spacing: -.05em; }
.runway-visual { grid-column: 1 / -1; height: 8px; background: #d5d9d4; }
.runway-visual span { display: block; width: var(--runway); height: 100%; background: var(--coral); transition: width .48s cubic-bezier(.22,1,.36,1); }
.scenario-note { grid-column: 1 / -1; min-height: 5.8rem; margin: 0; border-top: 1px solid #d2d6d1; padding: clamp(1.2rem, 2.6vw, 2.4rem); font-size: clamp(1rem, 1.6vw, 1.35rem); line-height: 1.55; }

.decision { display: grid; grid-template-columns: minmax(0, .9fr) minmax(26rem, 1.1fr); grid-template-rows: 1fr auto; gap: clamp(3rem, 8vw, 9rem); align-items: center; background: var(--coral); color: var(--forest); padding: clamp(3rem, 6vw, 6rem) clamp(1.25rem, 7vw, 7.5rem) 5.5rem; }
.decision-main h2 { max-width: 9ch; }
.decision-main > p:not(.eyebrow) { max-width: 42ch; margin: 2rem 0 0; line-height: 1.65; }
.decision-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 2rem; min-width: min(100%, 20rem); margin-top: 2.3rem; border: 1px solid var(--forest); background: var(--forest); color: white; padding: 1rem 1.15rem; font-size: .78rem; font-weight: 760; cursor: pointer; transition: transform .2s ease, background .2s ease; }
.decision-button:hover { transform: translateY(-2px); background: #25493d; }
.decision-list { border-top: 1px solid rgba(16,36,30,.4); }
.decision-list > div { display: grid; grid-template-columns: 2rem 1fr auto; gap: 1rem; align-items: start; border-bottom: 1px solid rgba(16,36,30,.4); padding: 1.4rem 0; }
.decision-list span, .decision-list small { font-size: .65rem; font-weight: 780; letter-spacing: .1em; }
.decision-list p { margin: 0; line-height: 1.45; }
.decision-list p strong { display: block; margin-bottom: .3rem; }

.report-footer { display: grid; grid-column: 1 / -1; grid-template-columns: 1fr 1.5fr 1fr; align-items: center; gap: 1rem; margin: 0 calc(clamp(1.25rem, 7vw, 7.5rem) * -1) -5.5rem; background: var(--forest); color: rgba(255,255,255,.65); padding: 1.15rem clamp(1.25rem, 7vw, 7.5rem); font-size: .68rem; }
.report-footer > div { display: flex; align-items: center; gap: .75rem; color: white; }
.report-footer p { margin: 0; text-align: center; }
.report-footer > span { text-align: right; }

.observe-reveal { opacity: .35; transform: translateY(26px); transition: opacity .62s cubic-bezier(.22,1,.36,1), transform .62s cubic-bezier(.22,1,.36,1); }
.observe-reveal.is-visible { opacity: 1; transform: translateY(0); }

.slide-controls {
  position: absolute;
  right: clamp(.85rem, 2.4vw, 2rem);
  bottom: clamp(.85rem, 2.4vw, 1.5rem);
  z-index: 45;
  display: grid;
  grid-template-columns: 2.7rem auto 2.7rem;
  align-items: center;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  background: rgba(16,36,30,.94);
  color: white;
  box-shadow: 0 14px 36px rgba(8,24,18,.24);
  backdrop-filter: blur(14px);
}
.slide-controls button { display: grid; width: 2.7rem; height: 2.7rem; place-items: center; border: 0; background: transparent; color: inherit; cursor: pointer; transition: background .18s ease, opacity .18s ease; }
.slide-controls button:hover:not(:disabled) { background: rgba(255,255,255,.11); }
.slide-controls button:disabled { opacity: .28; cursor: default; }
.slide-controls svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.slide-position { display: flex; min-width: 4.7rem; align-items: baseline; justify-content: center; gap: .35rem; border-inline: 1px solid rgba(255,255,255,.13); font-size: .66rem; letter-spacing: .08em; }
.slide-position strong { font-size: .78rem; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; }

.toast { position: fixed; right: 1rem; bottom: 1rem; z-index: 95; max-width: min(22rem, calc(100vw - 2rem)); background: var(--forest); color: white; padding: .85rem 1rem; font-size: .76rem; line-height: 1.4; opacity: 0; transform: translateY(1rem); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
.toast.is-visible { opacity: 1; transform: translateY(0); }

body.presentation-mode { background: var(--forest); }
body.presentation-mode main { max-width: none; box-shadow: none; }
body.presentation-mode .viewer-bar { background: rgba(16,36,30,.97); color: white; border-bottom-color: rgba(255,255,255,.16); }
body.presentation-mode .microvault-mark { color: white; }
body.presentation-mode .delivery-identity span { color: var(--mint); }
body.presentation-mode .viewer-button { border-color: rgba(255,255,255,.23); color: white; }
body.presentation-mode .viewer-button:hover { background: rgba(255,255,255,.08); }

button:focus-visible, a:focus-visible, textarea:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }

@media (max-width: 960px) {
  .viewer-bar { grid-template-columns: 1fr auto; }
  .delivery-identity { display: none; }
  .cover { grid-template-columns: minmax(0, .8fr) minmax(21rem, 1.2fr); }
  .cover-meta { grid-template-columns: repeat(3, 1fr); }
  .chapter-copy { gap: 3rem; }
  .constraint, .decision { grid-template-columns: 1fr; }
  .constraint-copy h2, .decision-main h2 { max-width: 11ch; }
  .funnel { margin-left: auto; width: min(100%, 40rem); }
}

@media (max-width: 680px) {
  .viewer-bar { min-height: 58px; padding: .55rem .65rem; }
  .microvault-mark span, .action-label { display: none; }
  .viewer-actions { gap: .3rem; }
  .viewer-button { min-width: 36px; min-height: 36px; padding: .5rem; }
  .reading-progress { top: 57px; }
  main { height: calc(100svh - 58px); }

  .cover {
    min-height: 100%;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(14rem, 1fr) auto;
    padding: 1.4rem 1rem 1rem;
  }
  .cover::after { right: -22%; top: 25%; width: 62vw; }
  .cover-grid { background-size: 42px 42px; }
  .cover-copy { align-self: start; padding: 0; }
  .cover-brand { margin-bottom: 2.5rem; font-size: .7rem; }
  .cover h1 { font-size: clamp(3.9rem, 20vw, 6rem); line-height: .83; }
  .cover-summary { max-width: 29ch; margin-top: 1.2rem; font-size: .94rem; }
  .cover-visual { min-height: 16rem; margin-top: .7rem; }
  .cover-visual svg { position: absolute; right: -13%; bottom: -15%; width: 114%; }
  .target-annotation { right: 2%; top: 17%; }
  .cover-meta { grid-template-columns: 1fr 1fr; gap: .85rem; padding-top: .9rem; }
  .cover-meta > div:nth-child(2),
  .cover-meta > div:nth-child(3) { display: none; }
  .cover-meta strong { font-size: .64rem; }
  .chapter { padding: 2rem 1rem 5.5rem; }
  .chapter-index { top: 2.1rem; }
  .chapter-intro h2, .constraint h2, .decision h2 { font-size: clamp(2.8rem, 14vw, 4.7rem); }
  .chapter-copy { grid-template-columns: 1fr; gap: 2rem; margin-top: 2.8rem; }
  .signal-strip { grid-template-columns: 1fr 1fr; margin-top: 3.5rem; }
  .signal-strip article:nth-child(2) { border-right: 0; }
  .signal-strip article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }

  .performance-figure { grid-template-columns: 1fr; margin-top: 3rem; }
  .performance-figure figcaption strong { max-width: none; }
  .performance-chart { min-height: 17rem; }
  .momentum-note { grid-template-columns: 1fr; }
  .note-number { font-size: 6rem; }

  .constraint { padding: 2.3rem 1rem 5.5rem; }
  .constraint-copy h2 span { margin-bottom: .45rem; }
  .funnel { margin-top: 1rem; }
  .stage-2 { width: 85%; }
  .stage-3 { width: 68%; }
  .stage-4 { width: 50%; }

  .scenario-layout { grid-template-columns: 1fr; margin-top: 3rem; }
  .scenario-tabs { grid-template-columns: repeat(3, 1fr); }
  .scenario-tabs button { display: block; padding: .9rem .35rem; text-align: center; }
  .scenario-tabs button small { display: none; }
  .scenario-tabs button[aria-selected="true"] { padding-left: .35rem; box-shadow: inset 0 -3px 0 var(--coral); }
  .scenario-panel { grid-template-columns: 1fr; }
  .scenario-output { border-right: 0; border-bottom: 1px solid #d2d6d1; }
  .scenario-output span { min-height: auto; }
  .runway-visual, .scenario-note { grid-column: auto; }

  .decision { padding: 2.3rem 1rem 5.5rem; }
  .decision-list > div { grid-template-columns: 1.6rem 1fr; }
  .decision-list small { grid-column: 2; }

  .report-footer { grid-template-columns: 1fr; margin: 0 -1rem -5.5rem; text-align: left; }
  .report-footer p { text-align: left; }
  .report-footer > span { text-align: left; }
  .slide-controls { right: .7rem; bottom: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
  .reveal, .observe-reveal { opacity: 1; transform: none; }
  .signal-path { stroke-dashoffset: 0; }
  .slide-track { transition-duration: .01ms; }
}