:root {
  --ink: #101b33;
  --ink-soft: #1b2a47;
  --paper: #f7f8fa;
  --paper-warm: #f1f0e9;
  --white: #ffffff;
  --blue: #2563eb;
  --blue-bright: #3b82f6;
  --blue-pale: #e8f0ff;
  --orange: #f97316;
  --orange-bright: #ff8a3d;
  --orange-pale: #fff0e5;
  --green: #22c55e;
  --muted: #64748b;
  --line: #d8dee8;
  --line-dark: rgba(255, 255, 255, 0.14);
  /* Avenir Next carries Vietnamese glyphs reliably on macOS; Futura does not. */
  --display: "Avenir Next", "Avenir", "Helvetica Neue", sans-serif;
  --body: "Avenir Next", "Helvetica Neue", sans-serif;
  --mono: "SFMono-Regular", "SF Mono", Menlo, monospace;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow: 0 20px 60px rgba(16, 27, 51, 0.12);
  --max-width: 1240px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  background: var(--orange);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button,
a {
  touch-action: manipulation;
}

button {
  color: inherit;
}

svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 180ms ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1500;
  height: 3px;
  background: transparent;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--orange);
  transform-origin: left;
}

.section-shell {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  padding: 0 max(24px, calc((100vw - var(--max-width)) / 2));
  border-bottom: 1px solid rgba(16, 27, 51, 0.09);
  background: rgba(247, 248, 250, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.wordmark-dot {
  color: var(--orange);
}

.wordmark-mark {
  display: grid;
  grid-template-columns: repeat(3, 6px);
  align-items: end;
  gap: 3px;
  width: 24px;
  height: 24px;
  padding: 3px;
  border-radius: 6px;
  background: var(--ink);
}

.wordmark-mark i {
  display: block;
  border-radius: 1px;
  background: var(--orange);
}

.wordmark-mark i:nth-child(1) {
  height: 7px;
}

.wordmark-mark i:nth-child(2) {
  height: 12px;
}

.wordmark-mark i:nth-child(3) {
  height: 18px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 13px;
  border-radius: 10px;
  color: #40506a;
  font-size: 14px;
  font-weight: 650;
  transition: color 180ms ease-out, background 180ms ease-out;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--blue-pale);
  color: var(--blue);
}

.site-nav .nav-cta {
  margin-left: 8px;
  padding-inline: 18px;
  background: var(--ink);
  color: var(--white);
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta.is-active {
  background: var(--orange);
  color: var(--ink);
}

.menu-toggle {
  display: none;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.menu-toggle:hover {
  background: var(--blue-pale);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(420px, 0.85fr);
  align-items: center;
  gap: 54px;
  min-height: 100dvh;
  padding-top: calc(var(--header-height) + 64px);
  padding-bottom: 88px;
}

.hero::before {
  position: absolute;
  z-index: -1;
  inset: 0 48% 0 calc(50% - 50vw);
  content: "";
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(to bottom, transparent 5%, #000 20%, #000 80%, transparent);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.eyebrow span + span {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  color: var(--muted);
}

.hero-kicker {
  margin: 0 0 8px;
  color: #3f4d63;
  font-weight: 650;
}

.hero h1,
.chapter-heading h2,
.closing h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.hero h1 {
  max-width: 820px;
  font-size: clamp(54px, 5.6vw, 88px);
}

.hero h1 em {
  color: var(--blue);
  font-style: normal;
}

.hero-intro {
  max-width: 680px;
  margin: 28px 0 0;
  color: #4d5b70;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 750;
  cursor: pointer;
  transition: transform 180ms ease-out, background 180ms ease-out, border-color 180ms ease-out;
}

.button:hover {
  transform: translateY(-2px);
}

.button svg {
  width: 20px;
  height: 20px;
}

.button-primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 0 12px 30px rgba(249, 115, 22, 0.2);
}

.button-primary:hover {
  background: var(--orange-bright);
}

.button-ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.66);
  color: var(--ink);
}

.button-ghost:hover {
  border-color: var(--blue);
  background: var(--white);
}

.hero-system {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 560px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 42px;
  background:
    radial-gradient(circle at 50% 46%, rgba(59, 130, 246, 0.35), transparent 24%),
    linear-gradient(145deg, #182747, #0b1428 70%);
  color: var(--white);
  box-shadow: 0 36px 90px rgba(16, 27, 51, 0.28);
}

.hero-system::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.26;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
}

.system-label {
  position: absolute;
  z-index: 2;
  top: 28px;
  left: 30px;
  color: rgba(255, 255, 255, 0.54);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.system-core {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 210px;
  min-height: 74px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(12px);
  transform: translate(-50%, -50%) rotate(-4deg);
}

.system-core span {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.system-core strong {
  color: var(--orange);
  font-size: 28px;
}

.system-cycle {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.system-cycle > path {
  fill: none;
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 2;
  marker-end: url("#system-arrow");
}

.system-cycle marker path {
  fill: var(--orange);
}

.system-node {
  position: absolute;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 118px;
  padding: 13px 15px;
  border-radius: 13px;
  background: var(--white);
  color: var(--ink);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.22);
}

.system-node span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
}

.system-node strong {
  font-size: 13px;
}

.node-a {
  top: 19%;
  right: 8%;
  transform: rotate(5deg);
}

.node-b {
  bottom: 12%;
  left: 14%;
  transform: rotate(-4deg);
}

.node-c {
  top: 38%;
  left: 3%;
  transform: rotate(-7deg);
}

.chapter {
  position: relative;
  overflow: hidden;
  padding: 128px 0;
}

.chapter-light {
  background: var(--paper);
}

.chapter-dark {
  background: var(--ink);
  color: var(--white);
}

.chapter-dark::before {
  position: absolute;
  top: 0;
  right: -12%;
  width: 62%;
  height: 750px;
  content: "";
  background: radial-gradient(circle, rgba(37, 99, 235, 0.35), transparent 65%);
  pointer-events: none;
}

.chapter-blue {
  background: var(--blue);
  color: var(--white);
}

.chapter-orange {
  background: var(--orange);
  color: var(--ink);
}

.chapter-heading {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 100px minmax(0, 820px);
  gap: 30px;
  margin-bottom: 78px;
}

.chapter-number {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.chapter-heading h2 {
  font-size: clamp(44px, 4.7vw, 66px);
}

.chapter-heading > div > p:last-child {
  max-width: 720px;
  margin: 24px 0 0;
  color: #526077;
  font-size: 18px;
}

.chapter-dark .chapter-heading > div > p:last-child,
.chapter-blue .chapter-heading > div > p:last-child {
  color: rgba(255, 255, 255, 0.86);
}

.chapter-orange .chapter-heading > div > p:last-child {
  color: rgba(16, 27, 51, 0.88);
}

.section-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.chapter-dark .section-label {
  color: var(--orange-bright);
}

.chapter-blue .section-label {
  color: var(--white);
}

.chapter-orange .section-label {
  color: var(--ink);
}

.business-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 70px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow);
}

.business-flow article {
  min-height: 260px;
  padding: 30px 27px;
  border-left: 1px solid var(--line);
}

.business-flow article:first-child {
  border-left: 0;
}

.business-flow article > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.business-flow svg {
  width: 34px;
  height: 34px;
  margin: 31px 0 18px;
  color: var(--blue);
}

.business-flow h3,
.concept-card h3,
.identity-card h3,
.hypothesis-head h3,
.values-intro h3,
.role-card h3,
.evolution-copy h3,
.working-agreement h3,
.learning-map-head h3,
.library-intro h3,
.glossary-intro h3,
.mission-summary h3 {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.business-flow h3 {
  font-size: 21px;
}

.business-flow p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.b2b-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 22px;
  margin-bottom: 72px;
}

.enterprise-map {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 70px;
  margin-bottom: 72px;
  padding: 34px 0 0;
  border-top: 1px solid var(--line);
}

.enterprise-map-intro h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(32px, 3.8vw, 50px);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.enterprise-map-intro > p:last-child {
  margin-top: 20px;
  color: var(--muted);
}

.enterprise-map-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 28px;
}

.enterprise-map-list article {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  padding: 0 0 24px;
  border-bottom: 1px solid var(--line);
}

.enterprise-map-list article:nth-child(n + 3) {
  padding-top: 24px;
  border-bottom: 0;
}

.enterprise-map-list article > span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
}

.enterprise-map-list h4 {
  margin: 0;
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: -0.03em;
}

.enterprise-map-list p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.concept-card {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-warm);
}

.concept-card-accent {
  border-color: var(--blue);
  background: var(--blue-pale);
}

.concept-tag,
.status-pill,
.media-type {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.concept-card-accent .concept-tag {
  background: var(--blue);
}

.concept-card h3 {
  max-width: 540px;
  margin-top: 28px;
  font-size: 30px;
}

.concept-card p {
  color: #596579;
}

.mini-flow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.mini-flow i {
  position: relative;
  flex: 1;
  height: 1px;
  background: var(--blue);
}

.mini-flow i::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--blue);
  border-right: 1px solid var(--blue);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.big-idea {
  margin: 0;
  padding: 62px clamp(28px, 6vw, 88px);
  border-left: 6px solid var(--orange);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background: var(--ink);
  color: var(--white);
}

.big-idea span {
  color: var(--orange-bright);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.big-idea p {
  max-width: 940px;
  margin: 18px 0 0;
  font-family: var(--display);
  font-size: clamp(27px, 3.3vw, 48px);
  letter-spacing: -0.045em;
  line-height: 1.14;
}

.big-idea strong {
  color: var(--orange-bright);
  font-weight: 750;
}

.identity-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 78px;
}

.identity-card {
  min-height: 420px;
  padding: clamp(30px, 4vw, 54px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
}

.identity-card-orange {
  background: var(--orange);
  color: var(--ink);
}

.identity-card-wide {
  grid-column: 1 / -1;
  min-height: auto;
}

.objectives-block {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  gap: 70px;
  margin: 0 0 112px;
  padding-top: 34px;
  border-top: 1px solid var(--line-dark);
}

.objectives-intro h3 {
  font-size: clamp(34px, 4vw, 52px);
}

.objectives-intro > p:last-child {
  color: rgba(255, 255, 255, 0.62);
}

.objective-list article {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line-dark);
}

.objective-list article:first-child {
  padding-top: 0;
  border-top: 0;
}

.objective-list article:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.objective-list > article > span {
  color: var(--orange-bright);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.objective-list h4 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(22px, 2.2vw, 30px);
  letter-spacing: -0.03em;
}

.objective-list p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.card-index {
  color: var(--orange-bright);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.identity-card-orange .card-index {
  color: #6e2b05;
}

.identity-card h3 {
  max-width: 630px;
  margin-top: 70px;
  font-size: clamp(34px, 4vw, 55px);
}

.identity-card p {
  max-width: 570px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.68);
}

.identity-card-orange p {
  color: rgba(16, 27, 51, 0.76);
}

.positioning-line {
  display: grid;
  grid-template-columns: auto 1fr 40px auto 1.3fr;
  align-items: center;
  gap: 18px;
  margin-top: 36px;
}

.positioning-line span {
  color: rgba(255, 255, 255, 0.56);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
}

.positioning-line strong {
  font-family: var(--display);
  font-size: clamp(22px, 3vw, 38px);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.positioning-line strong:last-child {
  color: var(--orange-bright);
}

.positioning-line svg {
  width: 28px;
  height: 28px;
}

.operating-hypothesis {
  position: relative;
  z-index: 1;
  margin-bottom: 112px;
  padding: clamp(28px, 5vw, 62px);
  border-radius: var(--radius-lg);
  background: var(--white);
  color: var(--ink);
}

.hypothesis-head {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.status-pill {
  background: var(--orange-pale);
  color: #8e3b0c;
}

.hypothesis-head h3 {
  margin-top: 18px;
  font-size: clamp(30px, 3vw, 44px);
}

.hypothesis-head > p {
  align-self: end;
  margin: 0;
  color: var(--muted);
}

.service-loop {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 40px 0 0;
  list-style: none;
}

.service-loop li {
  padding: 0 24px;
  border-left: 1px solid var(--line);
}

.service-loop li:first-child {
  padding-left: 0;
  border-left: 0;
}

.service-loop span {
  display: block;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
}

.service-loop strong {
  display: block;
  margin-top: 28px;
  font-family: var(--display);
  font-size: 25px;
  letter-spacing: -0.035em;
}

.service-loop p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.values-block {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  gap: 70px;
}

.values-intro h3 {
  font-size: clamp(34px, 4vw, 52px);
}

.values-intro > p:last-child {
  color: rgba(255, 255, 255, 0.62);
}

.value-list article {
  display: grid;
  grid-template-columns: 150px 1fr 1fr;
  align-items: baseline;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid var(--line-dark);
}

.value-list article:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.value-list span {
  color: var(--orange-bright);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.value-list h4 {
  margin: 0;
  font-family: var(--display);
  font-size: 24px;
  letter-spacing: -0.03em;
}

.value-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 14px;
}

.role-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px minmax(0, 1fr);
  align-items: stretch;
  margin-bottom: 80px;
}

.role-card {
  min-height: 520px;
  padding: clamp(30px, 4vw, 48px);
  border-radius: var(--radius-lg);
  color: var(--ink);
}

.role-founder {
  background: var(--white);
}

.role-hien {
  background: var(--orange);
}

.role-topline {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(16, 27, 51, 0.18);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.role-card h3 {
  margin-top: 65px;
  font-size: clamp(38px, 4vw, 56px);
}

.role-purpose {
  max-width: 440px;
  min-height: 58px;
  margin: 18px 0 30px;
  color: #46546a;
  font-size: 17px;
}

.role-hien .role-purpose {
  color: rgba(16, 27, 51, 0.74);
}

.role-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.role-card li {
  position: relative;
  padding: 12px 0 12px 24px;
  border-top: 1px solid rgba(16, 27, 51, 0.14);
}

.role-card li::before {
  position: absolute;
  top: 22px;
  left: 2px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  content: "";
}

.role-hien li::before {
  background: var(--ink);
}

.handoff {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.74);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.handoff i {
  display: block;
  width: 1px;
  height: 44px;
  background: rgba(255, 255, 255, 0.34);
}

.role-evolution {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  margin-bottom: 80px;
  padding: clamp(30px, 5vw, 62px);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius-lg);
  background: rgba(11, 35, 91, 0.28);
}

.status-pill-light {
  background: rgba(255, 255, 255, 0.16);
  color: var(--white);
}

.evolution-copy h3 {
  margin-top: 22px;
  font-size: clamp(34px, 4vw, 50px);
}

.evolution-copy p {
  color: rgba(255, 255, 255, 0.72);
}

.stage-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 6px;
  border-radius: 12px;
  background: rgba(9, 28, 73, 0.36);
}

.stage-tabs button {
  min-height: 46px;
  padding: 8px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 180ms ease-out, color 180ms ease-out;
}

.stage-tabs button:hover,
.stage-tabs button[aria-selected="true"] {
  background: var(--white);
  color: var(--blue);
}

.stage-panels {
  margin-top: 15px;
}

.stage-panel {
  min-height: 244px;
  padding: 34px;
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--ink);
}

.stage-panel[hidden] {
  display: none;
}

.stage-panel > span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
}

.stage-panel h4 {
  margin: 42px 0 12px;
  font-family: var(--display);
  font-size: 31px;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.stage-panel p {
  margin: 0;
  color: var(--muted);
}

.working-agreement {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 70px;
  padding-top: 65px;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
}

.working-agreement h3 {
  font-size: clamp(36px, 4vw, 54px);
}

.working-agreement > div > p:last-child {
  color: rgba(255, 255, 255, 0.7);
}

.working-agreement ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.working-agreement li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.working-agreement li:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.working-agreement li span {
  color: var(--orange-bright);
  font-family: var(--mono);
  font-size: 11px;
}

.working-agreement li p {
  margin: 0;
}

.ninety-days {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 90px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.ninety-days article {
  min-height: 280px;
  padding: 28px 25px;
  border-left: 1px solid var(--line);
}

.ninety-days article:first-child {
  border-left: 0;
}

.ninety-days span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
}

.ninety-days h3 {
  margin: 88px 0 10px;
  font-family: var(--display);
  font-size: 34px;
  letter-spacing: -0.04em;
}

.ninety-days p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.learning-map {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 70px;
  margin-bottom: 105px;
  padding: clamp(30px, 5vw, 62px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--white);
}

.learning-map-head h3 {
  font-size: clamp(36px, 4vw, 54px);
}

.learning-map ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.learning-map li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 22px;
  padding: 25px 0;
  border-top: 1px solid var(--line-dark);
}

.learning-map li:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.learning-map .year {
  color: var(--orange-bright);
  font-family: var(--display);
  font-size: 34px;
}

.learning-map strong {
  font-family: var(--display);
  font-size: 21px;
  letter-spacing: -0.025em;
}

.learning-map li p {
  margin: 7px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.library {
  display: grid;
  grid-template-columns: 0.67fr 1.33fr;
  gap: 70px;
  margin-bottom: 110px;
}

.library-intro h3,
.glossary-intro h3 {
  font-size: clamp(36px, 4vw, 52px);
}

.library-cards {
  display: grid;
  gap: 14px;
}

.library-cards article {
  position: relative;
  padding: 30px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
  transition: transform 180ms ease-out, border-color 180ms ease-out, box-shadow 180ms ease-out;
}

.library-cards article:hover {
  z-index: 2;
  border-color: var(--blue);
  box-shadow: var(--shadow);
  transform: translateX(-8px);
}

.media-type {
  background: var(--blue-pale);
  color: var(--blue);
}

.library-cards h4 {
  margin: 22px 0 8px;
  font-family: var(--display);
  font-size: 27px;
  letter-spacing: -0.035em;
}

.library-cards p {
  margin: 0;
  color: var(--muted);
}

.library-cards small {
  display: block;
  margin-top: 18px;
  color: #3b4a62;
  font-weight: 700;
}

.library-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.library-note strong {
  color: var(--ink);
}

.glossary {
  display: grid;
  grid-template-columns: 0.67fr 1.33fr;
  gap: 70px;
}

.glossary-list {
  border-top: 1px solid var(--ink);
}

.glossary-list article {
  border-bottom: 1px solid var(--line);
}

.glossary-list button {
  display: grid;
  grid-template-columns: 52px 1fr 44px;
  align-items: center;
  width: 100%;
  min-height: 72px;
  padding: 11px 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.glossary-list button:hover strong {
  color: var(--blue);
}

.glossary-list button span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.glossary-list button strong {
  font-family: var(--display);
  font-size: 22px;
  transition: color 180ms ease-out;
}

.glossary-list button svg {
  width: 22px;
  height: 22px;
  margin: auto;
  transition: transform 180ms ease-out;
}

.glossary-list button[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.glossary-list article > p {
  max-width: 640px;
  margin: -4px 44px 22px 52px;
  color: var(--muted);
}

.glossary-list article > p[hidden] {
  display: none;
}

.mission-board {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 18px;
  margin-bottom: 35px;
}

.mission-summary,
.checklist {
  border: 1px solid rgba(16, 27, 51, 0.18);
  border-radius: var(--radius-lg);
  background: var(--paper);
}

.mission-summary {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
  padding: clamp(30px, 4vw, 48px);
}

.status-pill-dark {
  background: var(--ink);
  color: var(--white);
}

.mission-summary h3 {
  margin-top: 56px;
  font-size: clamp(38px, 4vw, 54px);
}

.mission-summary > p {
  color: #536177;
}

.mission-progress {
  margin-top: 62px;
}

.mission-progress > div:first-child {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
}

.mission-progress strong {
  font-family: var(--display);
  font-size: 38px;
}

.mission-progress span {
  color: var(--muted);
  font-size: 13px;
}

.mission-progress-track {
  height: 9px;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 99px;
  background: #dfe4ec;
}

.mission-progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--blue);
  transition: width 240ms ease-out;
}

.reset-progress {
  min-height: 44px;
  margin-top: 24px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}

.reset-progress:hover {
  color: var(--blue);
}

.checklist {
  padding: 15px 34px;
}

.checklist label {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 17px;
  align-items: start;
  min-height: 96px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  cursor: pointer;
}

.checklist label:first-child {
  border-top: 0;
}

.checklist input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

.custom-check {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  margin-top: 2px;
  border: 1.5px solid #a7b1c0;
  border-radius: 8px;
  background: var(--white);
  transition: background 180ms ease-out, border-color 180ms ease-out, transform 180ms ease-out;
}

.custom-check svg {
  width: 18px;
  height: 18px;
  color: var(--white);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}

.checklist input:focus-visible + .custom-check {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

.checklist input:checked + .custom-check {
  border-color: var(--blue);
  background: var(--blue);
  transform: scale(1.03);
}

.checklist input:checked + .custom-check svg {
  opacity: 1;
  transform: scale(1);
}

.checklist input:checked ~ span:last-child strong {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
}

.checklist label > span:last-child {
  display: flex;
  flex-direction: column;
}

.checklist strong {
  font-family: var(--display);
  font-size: 19px;
  letter-spacing: -0.025em;
}

.checklist small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 14px;
}

.closing {
  padding: 70px 0 10px;
  border-top: 1px solid rgba(16, 27, 51, 0.25);
}

.closing h2 {
  max-width: 1000px;
  font-size: clamp(48px, 7vw, 94px);
}

.button-dark {
  margin-top: 42px;
  background: var(--ink);
  color: var(--white);
}

.button-dark:hover {
  background: #26395c;
}

.site-footer {
  padding: 44px 0;
  background: var(--ink);
  color: var(--white);
}

.site-footer .section-shell {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
}

.wordmark-footer .wordmark-mark {
  background: var(--white);
}

.site-footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-align: center;
}

.site-footer .section-shell > a:last-child {
  justify-self: end;
  min-height: 44px;
  padding: 10px 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease-out, transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.js .reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: 1fr 440px;
    gap: 35px;
  }

  .hero h1 {
    font-size: clamp(52px, 6.2vw, 76px);
  }

  .values-block,
  .objectives-block,
  .working-agreement,
  .learning-map,
  .library,
  .glossary {
    grid-template-columns: 1fr 1.4fr;
    gap: 42px;
  }

  .value-list article {
    grid-template-columns: 120px 0.8fr 1.2fr;
  }
}

/* Short laptop/browser windows need a calmer type scale so headings do not
   consume the whole viewport or look clipped when the user first lands. */
@media (min-width: 901px) and (max-height: 620px) {
  .hero {
    gap: 36px;
    padding-top: calc(var(--header-height) + 38px);
    padding-bottom: 130px;
  }

  .hero h1 {
    font-size: clamp(52px, 5vw, 76px);
  }

  .hero-intro {
    margin-top: 20px;
    font-size: 17px;
    line-height: 1.5;
  }

  .hero-system {
    max-width: 480px;
  }

  .chapter {
    padding: 96px 0;
  }

  .chapter-heading h2 {
    font-size: clamp(42px, 4.1vw, 60px);
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 68px;
  }

  .section-shell {
    width: min(calc(100% - 32px), var(--max-width));
  }

  .site-header {
    min-height: var(--header-height);
    padding-inline: 16px;
  }

  .menu-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 5px;
    padding: 16px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 18px 40px rgba(16, 27, 51, 0.12);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 180ms ease-out, transform 180ms ease-out;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    min-height: 48px;
    padding-inline: 16px;
  }

  .site-nav .nav-cta {
    margin: 5px 0 0;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 50px;
    padding-top: calc(var(--header-height) + 70px);
    padding-bottom: 88px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-system {
    width: min(100%, 560px);
    justify-self: center;
  }

  .business-flow,
  .service-loop,
  .ninety-days {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .business-flow article:nth-child(3),
  .business-flow article:nth-child(1),
  .service-loop li:nth-child(3),
  .service-loop li:nth-child(1),
  .ninety-days article:nth-child(3),
  .ninety-days article:nth-child(1) {
    border-left: 0;
  }

  .business-flow article:nth-child(n + 3),
  .service-loop li:nth-child(n + 3),
  .ninety-days article:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .service-loop li {
    padding: 24px;
  }

  .service-loop li:first-child {
    padding: 24px;
  }

  .values-block,
  .working-agreement,
  .learning-map,
  .library,
  .glossary {
    grid-template-columns: 1fr;
  }

  .values-intro,
  .working-agreement > div,
  .learning-map-head,
  .library-intro,
  .glossary-intro {
    max-width: 700px;
  }

  .role-stage {
    grid-template-columns: 1fr;
  }

  .handoff {
    flex-direction: row;
    min-height: 86px;
  }

  .handoff i {
    width: 44px;
    height: 1px;
  }

  .role-evolution {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .mission-board {
    grid-template-columns: 1fr;
  }

  .mission-summary {
    position: static;
  }
}

@media (max-width: 680px) {
  .section-shell {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .hero {
    padding-bottom: 80px;
  }

  .hero h1 {
    font-size: clamp(44px, 14vw, 68px);
  }

  .hero-intro {
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-system {
    border-radius: 26px;
  }

  .system-core {
    left: 58%;
    width: 186px;
    min-height: 64px;
    padding: 14px;
  }

  .system-core span {
    font-size: 10px;
    white-space: nowrap;
  }

  .system-core strong {
    font-size: 22px;
  }

  .system-node {
    min-width: 92px;
    padding: 10px 12px;
  }

  .system-node strong {
    font-size: 11px;
  }

  .chapter {
    padding: 88px 0;
  }

  .chapter-heading {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 50px;
  }

  .chapter-heading h2 {
    font-size: clamp(39px, 11vw, 56px);
  }

  .chapter-heading > div > p:last-child {
    font-size: 16px;
  }

  .business-flow,
  .service-loop,
  .ninety-days {
    grid-template-columns: 1fr;
  }

  .business-flow article,
  .business-flow article:first-child,
  .business-flow article:nth-child(3),
  .business-flow article:nth-child(1),
  .service-loop li,
  .service-loop li:first-child,
  .service-loop li:nth-child(3),
  .service-loop li:nth-child(1),
  .ninety-days article,
  .ninety-days article:nth-child(3),
  .ninety-days article:nth-child(1) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .business-flow article:first-child,
  .service-loop li:first-child,
  .ninety-days article:first-child {
    border-top: 0;
  }

  .business-flow article {
    min-height: auto;
  }

  .b2b-grid,
  .identity-grid,
  .enterprise-map {
    grid-template-columns: 1fr;
  }

  .enterprise-map-list {
    grid-template-columns: 1fr;
  }

  .enterprise-map-list article,
  .enterprise-map-list article:nth-child(n + 3) {
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
  }

  .enterprise-map-list article:first-child {
    padding-top: 0;
  }

  .identity-card-wide {
    grid-column: auto;
  }

  .identity-card {
    min-height: 360px;
  }

  .positioning-line {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .positioning-line svg {
    transform: rotate(90deg);
  }

  .hypothesis-head {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .objectives-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .value-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .role-card {
    min-height: auto;
  }

  .role-purpose {
    min-height: auto;
  }

  .stage-tabs {
    grid-template-columns: 1fr;
  }

  .working-agreement {
    padding-top: 48px;
  }

  .ninety-days article {
    min-height: auto;
  }

  .ninety-days h3 {
    margin-top: 45px;
  }

  .learning-map li {
    grid-template-columns: 52px 1fr;
  }

  .library-cards article:hover {
    transform: translateY(-4px);
  }

  .glossary-list article > p {
    margin-right: 0;
  }

  .checklist {
    padding: 8px 20px;
  }

  .checklist label {
    min-height: 112px;
  }

  .site-footer .section-shell {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .site-footer p {
    text-align: left;
  }

  .site-footer .section-shell > a:last-child {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}