:root {
  color-scheme: light;
  --ink: oklch(20% 0.018 248);
  --muted: oklch(45% 0.018 248);
  --quiet: oklch(62% 0.016 248);
  --paper: oklch(98% 0.004 95);
  --panel: oklch(94% 0.007 95);
  --line: oklch(82% 0.012 248);
  --accent: oklch(45% 0.12 248);
  --accent-dim: oklch(82% 0.04 248);
  --fg: var(--ink);
  --fg-2: var(--muted);
  --mute: var(--quiet);
  --flag: oklch(62% 0.14 70);
  --green: oklch(52% 0.12 158);
  --red: oklch(56% 0.14 28);
  --max: 1280px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --sans: Avenir Next, Avenir, "Helvetica Neue", sans-serif;
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  --mono: "Cascadia Mono", "SFMono-Regular", ui-monospace, monospace;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  font-family: var(--sans);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); color: var(--ink); }
body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
}

a { color: inherit; }
img, svg { display: block; }

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: 12px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid color-mix(in oklch, var(--line), transparent 18%);
  background: color-mix(in oklch, var(--paper) 91%, transparent);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.brand__btq {
  height: 22px;
  width: auto;
}

.legal__listing {
  margin-bottom: 10px;
  color: var(--ink);
  font-weight: 600;
}

.nav { display: flex; gap: 6px; color: var(--muted); font-size: 13px; }
.nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  text-decoration: none;
  transition: color 180ms var(--ease);
}
.nav a:hover { color: var(--ink); }

/* Hamburger toggle: hidden on desktop, revealed in the mobile breakpoint */
.nav-toggle {
  display: none;
  appearance: none;
  -webkit-appearance: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .22s var(--ease), opacity .22s var(--ease), background .1s linear;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; left: 0; top: -7px; }
.nav-toggle__bars::after { position: absolute; left: 0; top: 7px; }
.topbar.is-open .nav-toggle__bars { background: transparent; }
.topbar.is-open .nav-toggle__bars::before { transform: translateY(7px) rotate(45deg); }
.topbar.is-open .nav-toggle__bars::after { transform: translateY(-7px) rotate(-45deg); }

/* Scrollspy active state (set by app.js) */
.nav a.is-current { color: var(--accent); }
.nav a.is-current::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.topbar a:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, .95fr);
  align-items: center;
  gap: clamp(40px, 7vw, 104px);
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 128px clamp(18px, 4vw, 32px) 88px;
}

.hero__copy { max-width: 760px; }

.eyebrow,
.kicker,
.panel-label {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1, h2 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: 0;
  text-wrap: balance;
}

h1 {
  max-width: 900px;
  margin-bottom: 24px;
  font-size: clamp(3.25rem, 6vw, 5.5rem);
  line-height: .95;
}

h2 {
  margin-bottom: 22px;
  font-size: 4rem;
  line-height: 1;
}

h3 {
  margin-bottom: 14px;
  font-size: 2rem;
  line-height: 1.1;
}

.lede,
.chapter__intro p,
.finale p {
  color: var(--muted);
  font-size: 1.5rem;
  line-height: 1.42;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 16px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  font-weight: 780;
  text-decoration: none;
  transition: transform 180ms var(--ease), background 180ms var(--ease);
}

.button:hover { transform: translateY(-1px); }
.button--quiet { background: transparent; color: var(--ink); }

.panel,
.claim-card {
  border: 1px solid color-mix(in oklch, var(--line), var(--ink) 6%);
  background: color-mix(in oklch, var(--paper), white 42%);
}

.panel {
  padding: clamp(26px, 3.2vw, 44px);
  opacity: .86;
  transform: translateY(10px);
  transition: opacity 650ms var(--ease), transform 650ms var(--ease);
}

.panel.is-visible {
  opacity: 1;
  transform: none;
}

.hero__graphic h2 {
  font-family: var(--serif);
  font-size: 2.25rem;
  line-height: 1.08;
}

.accent-word {
  color: var(--accent);
}

.chart {
  width: 100%;
  max-width: 680px;
  aspect-ratio: 1.55 / 1;
  margin: 14px auto 0;
}

.chart--hero { margin-top: 22px; }
.chart svg { width: 100%; height: 100%; overflow: visible; }

.fadeable {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}

.fadeable.is-in {
  opacity: 1;
  transform: none;
}

.chapter {
  padding: clamp(72px, 9vw, 128px) clamp(18px, 4vw, 32px);
}

.chapter--tint {
  background: color-mix(in oklch, var(--panel), var(--paper) 28%);
}

.chapter--compact {
  padding-block: clamp(60px, 8vw, 96px);
}

.chapter__intro,
.chapter__body,
.finale,
.legal {
  width: min(100%, var(--max));
  margin-inline: auto;
}

.chapter__intro {
  display: block;
  max-width: 860px;
  margin-inline: auto;
  margin-bottom: clamp(40px, 6vw, 80px);
}

.chapter__intro .kicker {
  margin-bottom: 24px;
}

.chapter__intro h2 {
  margin-bottom: 20px;
}

.chapter__intro p:not(.kicker) {
  max-width: 700px;
}

.story-block {
  display: grid;
  grid-template-columns: minmax(420px, 1.02fr) minmax(0, .98fr);
  gap: clamp(36px, 6vw, 88px);
  align-items: start;
  margin-bottom: clamp(64px, 8vw, 112px);
}

.story-block .panel {
  padding: clamp(22px, 2.4vw, 32px);
}

.story-block--reverse .story-block__visual { order: 2; }
.story-block--reverse .story-block__steps { order: 1; }

.sticky {
  position: sticky;
  top: 92px;
  align-self: start;
}

.story-block__steps {
  display: grid;
  gap: 0;
  padding-block: 0;
}

.step {
  min-height: 176px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(18px, 2.4vw, 30px) 0;
  border: 0;
  border-top: 1px solid color-mix(in oklch, var(--line), transparent 10%);
  background: transparent;
  opacity: .7;
  transform: translateY(8px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease), border-color 420ms var(--ease);
}

.step:last-child {
  border-bottom: 1px solid color-mix(in oklch, var(--line), transparent 10%);
}

.step.is-active {
  opacity: 1;
  transform: none;
  border-color: color-mix(in oklch, var(--accent), var(--line) 40%);
}

.step p,
.claim-card p,
.source-note,
.legal {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.claim-card {
  padding: clamp(24px, 4vw, 40px);
  margin-bottom: clamp(64px, 8vw, 112px);
  opacity: .86;
  transform: translateY(12px);
  transition: opacity 650ms var(--ease), transform 650ms var(--ease);
}

.milestone-band {
  margin: clamp(24px, 5vw, 56px) 0 clamp(64px, 8vw, 112px);
  padding-block: clamp(24px, 4vw, 40px);
  border-top: 1px solid color-mix(in oklch, var(--line), transparent 8%);
  border-bottom: 1px solid color-mix(in oklch, var(--line), transparent 8%);
  opacity: .9;
}

.milestone-band h3 {
  max-width: 820px;
  margin-bottom: 12px;
}

.milestone-band p {
  max-width: 980px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.claim-card.is-visible {
  opacity: 1;
  transform: none;
}

.claim-card--wide {
  margin-bottom: 0;
  padding-block: clamp(32px, 5vw, 56px);
}

.grid-four,
.roadmap {
  display: grid;
  gap: 1px;
  background: color-mix(in oklch, var(--line), transparent 10%);
  border: 1px solid color-mix(in oklch, var(--line), transparent 10%);
}

.grid-four div,
.roadmap div {
  background: color-mix(in oklch, var(--paper), white 36%);
  padding: 18px;
}

/* Compounding-cadence timeline. Milestones sit proportionally on a real time
   axis, so the 4-year gap (2019 to 2023) collapsing into annual steps reads
   straight off the spacing. Dots grow left to right, 2026 is the emphasized
   "now" anchor, and labels stagger above/below to stay legible where the
   recent years cluster. */
.cadence {
  position: relative;
  list-style: none;
  margin: clamp(28px, 4vw, 44px) clamp(56px, 9%, 120px) 6px;
  padding: 0;
  height: 138px;
}

/* --cad-progress (0% at 2019, 100% at 2026) drives both the line fill and the
   traveling circle from one value, so they stay locked together. Registered so
   it can be transitioned. */
@property --cad-progress {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 100%;
}

/* axis: bright behind the traveler, dim ahead of it */
.cadence::before {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 2px;
  transform: translateY(-50%);
  background: linear-gradient(
    to right,
    var(--accent) 0 var(--cad-progress),
    color-mix(in oklch, var(--accent), transparent 82%) var(--cad-progress));
}

/* the traveling "now" circle; at rest it sits coincident with the 2026 anchor */
.cadence::after {
  content: "";
  position: absolute;
  top: 50%;
  left: var(--cad-progress);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent);
  box-shadow:
    0 0 0 4px var(--paper),
    0 0 0 7px color-mix(in oklch, var(--accent), transparent 78%);
  z-index: 2;
}

.cadence-node {
  position: absolute;
  top: 0;
  left: calc(var(--p) * 1%);
  transform: translateX(-50%);
  height: 100%;
  width: clamp(96px, 12vw, 146px);
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  justify-items: center;
}

.cadence-dot {
  grid-row: 2;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--paper);
}

.cadence-node:nth-child(1) .cadence-dot { width: 7px; height: 7px; }
.cadence-node:nth-child(3) .cadence-dot { width: 10px; height: 10px; }
.cadence-node:nth-child(4) .cadence-dot { width: 12px; height: 12px; }

.cadence-content {
  grid-row: 3;
  align-self: start;
  margin-top: 13px;
  text-align: center;
}

.cadence-node:nth-child(even) .cadence-content {
  grid-row: 1;
  align-self: end;
  margin-top: 0;
  margin-bottom: 13px;
}

.cadence-year {
  display: block;
  font: 780 clamp(16px, 1.8vw, 20px) / 1 var(--sans);
  letter-spacing: .01em;
  color: var(--ink);
}

.cadence-label {
  display: block;
  margin-top: 4px;
  font: 600 12px / 1.3 var(--sans);
  color: var(--muted);
}

.cadence-node.is-now .cadence-dot {
  width: 16px;
  height: 16px;
  box-shadow:
    0 0 0 4px var(--paper),
    0 0 0 7px color-mix(in oklch, var(--accent), transparent 78%);
}

.cadence-node.is-now .cadence-year { color: var(--accent); }
.cadence-node.is-now .cadence-label { color: var(--ink); }

/* --- Scroll-triggered travel (app.js adds .is-armed on load, .is-playing on
   scroll-into-view; skipped entirely under reduced motion). --- */

/* Armed: snap the strip to its dim "pre-arrival" state, circle at 2019. */
.cadence.is-armed { --cad-progress: 0%; }

.cadence.is-armed .cadence-dot {
  background: color-mix(in oklch, var(--accent), transparent 72%);
  box-shadow: 0 0 0 4px var(--paper);
  transform: scale(.6);
}

.cadence.is-armed .cadence-year { color: var(--quiet); }
.cadence.is-armed .cadence-label { opacity: .4; }

/* Playing: travel the circle 2019 -> 2026 and let each milestone light as the
   circle reaches it. The line/circle move over 2s linear; each node's delay is
   its own position (--p) on that same 2s timeline, so they arrive in sync. */
.cadence.is-armed.is-playing {
  --cad-progress: 100%;
  transition: --cad-progress 2000ms linear;
}

.cadence.is-armed.is-playing .cadence-dot {
  background: var(--accent);
  transform: none;
  transition: background .3s ease, transform .35s var(--ease), box-shadow .3s ease;
  transition-delay: calc(var(--p) * 20ms);
}

.cadence.is-armed.is-playing .cadence-node.is-now .cadence-dot {
  box-shadow:
    0 0 0 4px var(--paper),
    0 0 0 7px color-mix(in oklch, var(--accent), transparent 78%);
}

.cadence.is-armed.is-playing .cadence-year {
  color: var(--ink);
  transition: color .3s ease;
  transition-delay: calc(var(--p) * 20ms);
}

.cadence.is-armed.is-playing .cadence-node.is-now .cadence-year { color: var(--accent); }

.cadence.is-armed.is-playing .cadence-label {
  opacity: 1;
  transition: opacity .3s ease;
  transition-delay: calc(var(--p) * 20ms);
}

.grid-four {
  grid-template-columns: repeat(4, 1fr);
  margin-top: 24px;
}

.grid-four b {
  display: block;
  margin-bottom: 10px;
  font-size: 15px;
}

.grid-four span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.42;
}

code {
  color: var(--ink);
  font-family: "Cascadia Mono", "SFMono-Regular", ui-monospace, monospace;
  font-size: .92em;
}

.roadmap {
  grid-template-columns: repeat(5, 1fr);
  opacity: .88;
  transform: translateY(12px);
  transition: opacity 650ms var(--ease), transform 650ms var(--ease);
}

.roadmap.is-visible {
  opacity: 1;
  transform: none;
}

.roadmap div {
  min-height: 220px;
  padding: 24px;
}

.roadmap strong {
  display: block;
  margin-bottom: 28px;
  color: var(--accent);
  font-size: 22px;
}

.roadmap p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.finale {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: clamp(32px, 6vw, 78px);
  align-items: end;
  padding: clamp(88px, 12vw, 160px) clamp(18px, 4vw, 32px);
}

.finale h2 {
  max-width: 850px;
}

.finale-card h3 {
  font-size: 1.25rem;
  line-height: 1.3;
}

.focus-list {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-md);
}

.focus-list li {
  display: grid;
  gap: 3px;
  padding-left: var(--space-md);
  border-left: 2px solid var(--accent);
}

.focus-list strong {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
}

.focus-list span {
  font-size: 1rem;
  line-height: 1.35;
  color: var(--ink);
}

.legal {
  padding: 28px clamp(18px, 4vw, 32px) 40px;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

@media (max-width: 920px) {
  /* Nav collapses into a hamburger-triggered dropdown panel anchored under
     the fixed header. Hidden until app.js sets .topbar.is-open. */
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 6px clamp(18px, 4vw, 48px) 14px;
    background: var(--paper);
    border-bottom: 1px solid color-mix(in oklch, var(--line), transparent 8%);
    box-shadow: 0 22px 44px -28px color-mix(in oklch, var(--ink), transparent 45%);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  }
  .topbar.is-open .nav {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }
  .nav a {
    min-height: 52px;
    padding: 14px 4px;
    font-size: 16px;
    border-top: 1px solid color-mix(in oklch, var(--line), transparent 35%);
  }
  .nav a:first-child { border-top: 0; }
  .nav a.is-current::after { display: none; }
  .hero,
  .chapter__intro,
  .story-block,
  .finale {
    grid-template-columns: 1fr;
  }

  .story-block--reverse .story-block__visual,
  .story-block--reverse .story-block__steps {
    order: initial;
  }

  .sticky {
    position: relative;
    top: auto;
  }

  .story-block__steps {
    padding-block: 24px;
  }

  .step {
    min-height: auto;
    padding-block: 28px;
  }

  h1 { font-size: 4.25rem; }
  h2 { font-size: 3rem; }
  h3 { font-size: 1.625rem; }
  .lede,
  .chapter__intro p,
  .finale p { font-size: 1.25rem; }
  .hero__graphic h2 { font-size: 1.875rem; }

  .grid-four,
  .roadmap {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .hero { padding-top: 96px; }
  h1 { font-size: 3rem; }
  h2 { font-size: 2.125rem; }
  h3 { font-size: 1.375rem; }
  .lede,
  .chapter__intro p,
  .finale p { font-size: 1.125rem; }
  .hero__graphic h2 { font-size: 1.5rem; }
  .panel,
  .claim-card {
    padding: 22px;
  }

  .chart {
    aspect-ratio: 1.45 / 1;
  }

  .grid-four,
  .roadmap {
    grid-template-columns: 1fr;
  }

  /* Cadence collapses to a vertical rail: dots on the line, year + label to
     the right. Proportional spacing does not survive a phone width, so the
     accelerating story carries through the top-to-bottom reading order. */
  .cadence {
    height: auto;
    margin: 26px 0 4px;
    padding-left: 30px;
  }
  .cadence::before {
    inset: 4px auto 4px 7px;
    width: 2px;
    height: auto;
    transform: none;
    background: linear-gradient(
      to bottom,
      var(--accent) 0 var(--cad-progress),
      color-mix(in oklch, var(--accent), transparent 82%) var(--cad-progress));
  }
  /* On phones the circle does not travel; reset it to a static end-of-rail
     arrow and let the line draw down with sequential light-up instead. */
  .cadence::after {
    left: 7px;
    top: auto;
    bottom: -3px;
    width: 0;
    height: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 9px solid var(--accent);
  }
  .cadence-node,
  .cadence-node:nth-child(even) {
    position: relative;
    left: auto;
    transform: none;
    width: auto;
    height: auto;
    display: block;
    padding: 11px 0;
  }
  .cadence-content,
  .cadence-node:nth-child(even) .cadence-content {
    grid-row: auto;
    margin: 0;
    text-align: left;
  }
  .cadence-dot {
    position: absolute;
    left: -23px;
    top: 15px;
    transform: translateX(-50%);
  }
  /* keep the rail centering while the armed state applies its scale */
  .cadence.is-armed .cadence-dot { transform: translateX(-50%) scale(.6); }
  .cadence.is-armed.is-playing .cadence-dot { transform: translateX(-50%); }
  .cadence-year { display: inline; }
  .cadence-label { display: inline; margin: 0 0 0 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .fadeable,
  .panel,
  .claim-card,
  .roadmap,
  .step {
    opacity: 1;
    transform: none;
  }
}