chapter.css

:root {
  --ink: #1d201c;
  --ink-soft: #292d27;
  --paper: #f3f0e8;
  --paper-2: #e9e5da;
  --muted: #676b63;
  --line: rgba(29, 32, 28, 0.16);
  --light-line: rgba(255, 255, 255, 0.13);
  --accent: #dfff59;
  --accent-dark: #6c8308;
  --wrap: min(1200px, calc(100vw - 56px));
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}
button,
input {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}
.skip-link:focus {
  transform: none;
}

.wrap {
  width: var(--wrap);
  margin-inline: auto;
}

.nav-shell {
  position: absolute;
  z-index: 20;
  top: 0;
  width: 100%;
  color: var(--paper);
}

.nav-shell.scrolled {
  position: fixed;
  color: var(--ink);
  background: rgba(243, 240, 232, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  animation: nav-in 240ms ease both;
}

.nav {
  height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.brand {
  width: max-content;
  color: inherit;
  font-size: 1.08rem;
  font-weight: 850;
  letter-spacing: -0.06em;
  text-decoration: none;
}
.brand span {
  color: var(--accent);
}
.scrolled .brand span {
  color: var(--accent-dark);
}

.nav-links {
  display: flex;
  gap: 34px;
}
.nav-links a,
.nav-cta {
  position: relative;
  color: inherit;
  font:
    650 0.69rem/1 ui-monospace,
    "SFMono-Regular",
    Consolas,
    monospace;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}
.nav-links a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform 180ms ease;
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-cta {
  justify-self: end;
}
.nav-cta span {
  display: inline-block;
  transition: transform 180ms ease;
}
.nav-cta:hover span {
  transform: translate(3px, -3px);
}

.hero {
  position: relative;
  width: 100%;
  min-height: 820px;
  padding: 0 max(28px, calc((100vw - 1200px) / 2));
  color: var(--paper);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--ink);
  background-size: 42px 42px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  top: 50px;
  right: -270px;
  border: 1px solid rgba(223, 255, 89, 0.15);
  border-radius: 50%;
  box-shadow:
    0 0 0 110px rgba(223, 255, 89, 0.018),
    0 0 0 220px rgba(223, 255, 89, 0.012);
}

.chapter-stamp {
  position: absolute;
  top: 126px;
  right: max(28px, calc((100vw - 1200px) / 2));
  display: flex;
  gap: 36px;
  color: #8f948a;
  font:
    600 0.62rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-grid {
  min-height: 750px;
  display: grid;
  grid-template-columns: 1.38fr 0.62fr;
  gap: clamp(60px, 8vw, 130px);
  align-items: center;
  padding-top: 96px;
}

.kicker,
.eyebrow,
.section-index {
  font:
    650 0.65rem/1.4 ui-monospace,
    "SFMono-Regular",
    Consolas,
    monospace;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: #a6aaa1;
}
.kicker span {
  width: 7px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(223, 255, 89, 0.1);
}

.hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(4.25rem, 7vw, 7.25rem);
  font-weight: 680;
  line-height: 0.89;
  letter-spacing: -0.077em;
}
.hero h1 em {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.hero-intro {
  max-width: 625px;
  margin: 34px 0 0;
  color: #aeb2a9;
  font-size: clamp(1rem, 1.4vw, 1.17rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 38px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 0 18px;
  border: 0;
  border-radius: 2px;
  font-size: 0.73rem;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}
.button:hover {
  transform: translateY(-2px);
}
.button-primary {
  color: var(--ink);
  background: var(--accent);
}
.button-primary:hover {
  box-shadow: 0 9px 28px rgba(223, 255, 89, 0.12);
}
.button-dark {
  margin-top: 28px;
  color: var(--paper);
  background: var(--ink);
}
.button-dark:disabled {
  opacity: 0.48;
  cursor: wait;
}

.text-link {
  color: #c6c9c1;
  font:
    600 0.7rem/1 ui-monospace,
    monospace;
  text-decoration: none;
}
.text-link span {
  color: var(--accent);
}

.hero-console {
  position: relative;
  width: 100%;
  max-width: 360px;
  justify-self: end;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(22, 24, 21, 0.78);
  box-shadow: 0 35px 80px rgba(0, 0, 0, 0.24);
}
.hero-console::before {
  content: "";
  position: absolute;
  inset: 10px -10px -10px 10px;
  z-index: -1;
  border: 1px solid rgba(223, 255, 89, 0.18);
}
.console-bar {
  height: 42px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 13px;
  border-bottom: 1px solid var(--light-line);
  color: #70756c;
  font:
    600 0.55rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.console-bar > span:last-child {
  justify-self: end;
}
.console-dots {
  display: flex;
  gap: 5px;
}
.console-dots i {
  width: 5px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #52574e;
}
.console-dots i:first-child {
  background: var(--accent);
}

.console-visual {
  position: relative;
  height: 320px;
  display: grid;
  place-content: center;
  text-align: center;
  overflow: hidden;
}
.console-visual strong {
  position: relative;
  z-index: 2;
  color: var(--accent);
  font-size: 5.7rem;
  font-weight: 550;
  line-height: 0.85;
  letter-spacing: -0.09em;
}
.console-visual strong span {
  font-size: 2rem;
  vertical-align: top;
}
.console-visual p {
  position: relative;
  z-index: 2;
  margin: 14px 0 0;
  color: #9ba096;
  font-size: 0.68rem;
  line-height: 1.45;
  text-transform: uppercase;
}
.radar-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.ring-one {
  width: 245px;
  height: 245px;
}
.ring-two {
  width: 175px;
  height: 175px;
  border-style: dashed;
}
.ring-three {
  width: 92px;
  height: 92px;
}
.radar-axis {
  position: absolute;
  background: rgba(255, 255, 255, 0.07);
}
.axis-x {
  left: 38px;
  right: 38px;
  top: 50%;
  height: 1px;
}
.axis-y {
  top: 38px;
  bottom: 38px;
  left: 50%;
  width: 1px;
}
.radar-node {
  position: absolute;
  width: 7px;
  aspect-ratio: 1;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(223, 255, 89, 0.6);
}
.node-one {
  top: 82px;
  left: 91px;
}
.node-two {
  top: 111px;
  right: 72px;
}
.node-three {
  bottom: 64px;
  left: 153px;
}

.console-data {
  margin: 0;
  border-top: 1px solid var(--light-line);
}
.console-data div {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  padding: 13px 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font:
    600 0.59rem/1.3 ui-monospace,
    monospace;
  text-transform: uppercase;
}
.console-data div:last-child {
  border: 0;
}
.console-data dt {
  color: #656a62;
}
.console-data dd {
  margin: 0;
  color: #b5b9b0;
}
.signal {
  display: inline-block;
  width: 5px;
  aspect-ratio: 1;
  margin-right: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-foot {
  height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: #81867d;
  font:
    600 0.62rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.hero-foot strong {
  color: #d9dcd4;
}
.hero-foot p:last-child span {
  color: var(--accent);
}

.signal-strip {
  overflow: hidden;
  color: var(--ink);
  background: var(--accent);
}
.signal-track {
  width: max-content;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 26px;
  padding-left: 26px;
  font:
    750 0.68rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  animation: marquee 28s linear infinite;
}
.signal-track i {
  font-style: normal;
  font-size: 0.55rem;
}

.section {
  padding-block: 130px;
  border-bottom: 1px solid var(--line);
}
.section-index {
  color: #8a8e85;
}
.eyebrow {
  margin: 0 0 20px;
  color: var(--accent-dark);
}
.section h2 {
  margin: 0;
  font-size: clamp(3.2rem, 5.9vw, 6.4rem);
  font-weight: 650;
  line-height: 0.94;
  letter-spacing: -0.07em;
}
.large-copy {
  font-size: clamp(1.25rem, 2.25vw, 2rem);
  line-height: 1.45;
  letter-spacing: -0.025em;
}

.intro {
  display: grid;
  grid-template-columns: 0.23fr 1.1fr 0.52fr;
  gap: clamp(28px, 5vw, 80px);
  align-items: start;
}
.intro-main .large-copy {
  max-width: 820px;
  margin: 44px 0 0;
}
.intro-aside {
  padding-top: 42px;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.75;
}
.intro-aside p {
  margin: 0 0 25px;
}

.work-heading {
  display: grid;
  grid-template-columns: 0.23fr 1.1fr 0.52fr;
  gap: clamp(28px, 5vw, 80px);
  align-items: end;
  margin-bottom: 68px;
}
.work-note {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}
.case-list {
  border-top: 1px solid var(--line);
}
.case-card {
  display: grid;
  grid-template-columns: 0.17fr 1.08fr 0.65fr;
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  min-height: 420px;
  padding-block: 54px;
  border-bottom: 1px solid var(--line);
}
.case-number {
  align-self: start;
  color: #8b8f86;
  font:
    600 0.67rem/1 ui-monospace,
    monospace;
}
.case-type {
  margin: 0 0 20px;
  color: var(--accent-dark);
  font:
    650 0.64rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.case-content h3 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(2rem, 3.5vw, 3.75rem);
  font-weight: 620;
  line-height: 1;
  letter-spacing: -0.055em;
}
.case-content > p:not(.case-type) {
  max-width: 660px;
  margin: 25px 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.pill-list li {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: #65695f;
  font-size: 0.65rem;
}

.case-diagram {
  position: relative;
  min-height: 260px;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(29, 32, 28, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 32, 28, 0.04) 1px, transparent 1px),
    var(--paper-2);
  background-size: 22px 22px;
  overflow: hidden;
}
.diagram-status {
  position: absolute;
  right: 14px;
  bottom: 12px;
  left: 14px;
  color: #797d74;
  font:
    600 0.54rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.intent-node {
  position: absolute;
  z-index: 2;
  top: calc(50% - 19px);
  left: calc(50% - 19px);
  width: 38px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font:
    750 0.58rem/1 ui-monospace,
    monospace;
}
.diagram-label {
  position: absolute;
  z-index: 2;
  top: 17px;
  left: 17px;
  color: var(--accent-dark);
  font:
    650 0.55rem/1 ui-monospace,
    monospace;
  text-transform: uppercase;
}

.document-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.doc {
  width: 80px;
  height: 110px;
  padding: 13px 10px;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.doc i {
  display: block;
  height: 5px;
  margin-bottom: 9px;
  background: #a9aca4;
}
.doc i:nth-child(2) {
  width: 68%;
  background: var(--accent-dark);
}
.doc i:nth-child(4) {
  width: 76%;
}
.split-mark {
  font-size: 1.2rem;
}
.doc-parts {
  display: grid;
  gap: 5px;
}
.doc-parts i {
  width: 58px;
  height: 28px;
  border: 1px solid var(--ink);
  background: var(--accent);
}
.doc-parts i:nth-child(2) {
  transform: translateX(9px);
  background: var(--paper);
}

.event-diagram,
.agent-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.event-line {
  display: flex;
  align-items: center;
  width: 250px;
}
.event-line::before {
  content: "";
  position: absolute;
  width: 250px;
  height: 1px;
  background: var(--ink);
}
.event-line i {
  position: relative;
  width: 11px;
  aspect-ratio: 1;
  margin-right: 49px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--accent);
}
.event-line i:last-child {
  margin: 0;
}
.event-bars {
  height: 70px;
  display: flex;
  align-items: end;
  gap: 7px;
  margin-top: 24px;
}
.event-bars i {
  width: 34px;
  height: 20%;
  border: 1px solid rgba(29, 32, 28, 0.4);
  background: rgba(29, 32, 28, 0.08);
}
.event-bars i:nth-child(2) {
  height: 42%;
}
.event-bars i:nth-child(3) {
  height: 30%;
}
.event-bars i:nth-child(4) {
  height: 68%;
  background: var(--accent);
}
.event-bars i:nth-child(5) {
  height: 48%;
}
.event-bars i:nth-child(6) {
  height: 90%;
  background: var(--ink);
}

.impact-band {
  color: var(--paper);
  background: var(--ink);
}
.impact-grid {
  min-height: 245px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
}
.impact-item {
  min-height: 120px;
  display: flex;
  align-items: flex-end;
  gap: 16px;
  padding: 20px 28px;
  border-right: 1px solid var(--light-line);
}
.impact-item:first-child {
  padding-left: 0;
}
.impact-item:last-child {
  border: 0;
}
.impact-item strong {
  color: var(--accent);
  font-size: clamp(2.8rem, 3.5vw, 4rem);
  font-weight: 540;
  line-height: 0.8;
  letter-spacing: -0.07em;
}
.impact-item strong span {
  font-size: 0.5em;
  vertical-align: top;
}
.impact-item > span {
  color: #8c9187;
  font-size: 0.67rem;
  line-height: 1.5;
}

.lab {
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  gap: clamp(60px, 9vw, 140px);
  align-items: center;
}
.lab-copy h2 {
  margin-top: 0;
}
.lab-copy .section-index {
  margin-bottom: 48px;
}
.lab-copy .large-copy {
  margin: 36px 0 18px;
}
.lab-copy > p:last-of-type {
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.7;
}
.queue-lab {
  border: 1px solid var(--ink);
  background: var(--paper-2);
  box-shadow: 12px 12px 0 rgba(29, 32, 28, 0.08);
}
.lab-topbar {
  height: 42px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 15px;
  color: var(--paper);
  background: var(--ink);
  font:
    600 0.58rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lab-topbar span:first-child::before {
  content: "";
  display: inline-block;
  width: 6px;
  aspect-ratio: 1;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.queue-stage {
  position: relative;
  height: 330px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  align-items: center;
  padding: 38px;
  overflow: hidden;
}
.queue-connectors {
  position: absolute;
  z-index: 1;
  top: 50%;
  right: 12%;
  left: 12%;
  border-top: 1px dashed rgba(29, 32, 28, 0.4);
}
.queue-node {
  position: relative;
  z-index: 2;
  height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--paper);
  transition:
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}
.queue-node span {
  position: absolute;
  top: 8px;
  left: 9px;
  color: #92968d;
  font:
    600 0.5rem/1 ui-monospace,
    monospace;
}
.queue-node strong {
  font-size: 0.77rem;
}
.queue-node small {
  color: #858981;
  font:
    600 0.52rem/1 ui-monospace,
    monospace;
  text-transform: uppercase;
}
.queue-node.active {
  border-color: var(--ink);
  background: var(--accent);
}
.queue-node.failed {
  color: var(--paper);
  background: #9d4938;
}
.queue-node.failed small,
.queue-node.failed span {
  color: #f3c4ba;
}
.job-token {
  position: absolute;
  z-index: 4;
  top: calc(50% - 17px);
  left: 6.7%;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 2px solid var(--paper-2);
  border-radius: 50%;
  color: var(--accent);
  background: var(--ink);
  font:
    700 0.5rem/1 ui-monospace,
    monospace;
  opacity: 0;
  transform: translateX(0);
  transition:
    transform 520ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity 160ms ease;
}
.job-token span {
  display: none;
}
.job-token.visible {
  opacity: 1;
}
.job-token.at-intake {
  transform: translateX(0);
}
.job-token.at-queue {
  transform: translateX(172px);
}
.job-token.at-worker {
  transform: translateX(344px);
}
.job-token.at-store {
  transform: translateX(516px);
}
.lab-log {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 0.7fr;
  border-top: 1px solid var(--line);
}
.lab-log div {
  min-height: 70px;
  display: grid;
  align-content: center;
  gap: 7px;
  padding: 0 16px;
  border-right: 1px solid var(--line);
}
.lab-log div:last-child {
  border: 0;
}
.lab-log span {
  color: #8a8e85;
  font:
    600 0.5rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lab-log strong {
  font-size: 0.7rem;
}

.side-heading,
.experience-heading {
  display: grid;
  grid-template-columns: 0.23fr 1.65fr;
  gap: clamp(28px, 5vw, 80px);
  margin-bottom: 58px;
}
.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-left: calc(16.5% + 28px);
}
.project-card {
  min-height: 410px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--paper-2);
}
.project-card.inverse {
  color: var(--paper);
  background: var(--ink);
}
.project-top,
.project-foot {
  display: flex;
  justify-content: space-between;
  color: #858981;
  font:
    600 0.55rem/1.3 ui-monospace,
    monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.project-card h3 {
  max-width: 400px;
  margin: 85px 0 20px;
  font-size: clamp(2rem, 3.4vw, 3.4rem);
  font-weight: 620;
  line-height: 0.95;
  letter-spacing: -0.06em;
}
.project-card > p {
  max-width: 470px;
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.68;
}
.project-card.inverse > p {
  color: #9ea39a;
}
.project-award {
  align-self: flex-start;
  margin: -6px 0 18px;
  padding: 6px 10px;
  border: 1px solid var(--accent-dark);
  border-radius: 999px;
  color: var(--accent-dark);
  font:
    600 0.6rem/1.3 ui-monospace,
    monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.inverse .project-award {
  border-color: var(--accent);
  color: var(--accent);
}
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 22px 0;
  font:
    600 0.62rem/1.3 ui-monospace,
    monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.project-links a {
  color: var(--accent-dark);
  text-decoration: none;
  border-bottom: 1px solid currentcolor;
}
.project-links a:hover,
.project-links a:focus-visible {
  color: inherit;
}
.inverse .project-links a {
  color: var(--accent);
}
.project-foot {
  margin-top: auto;
  padding-top: 25px;
  border-top: 1px solid var(--line);
}
.inverse .project-foot {
  border-color: var(--light-line);
}
.project-foot span:last-child {
  color: var(--accent-dark);
}
.inverse .project-foot span:last-child {
  color: var(--accent);
}

.principles {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  gap: clamp(50px, 9vw, 150px);
}
.principles-heading .section-index {
  margin-bottom: 52px;
}
.principle-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.principle-list li {
  position: relative;
  display: grid;
  grid-template-columns: 55px 0.75fr 1fr;
  gap: 20px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.principle-list li > span {
  color: #8a8e85;
  font:
    600 0.6rem/1.4 ui-monospace,
    monospace;
}
.principle-list h3 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}
.principle-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.65;
}

.timeline {
  margin-left: calc(16.5% + 28px);
  border-top: 1px solid var(--line);
}
.timeline-row {
  position: relative;
  display: grid;
  grid-template-columns: 0.45fr 0.85fr 1fr;
  gap: 30px;
  padding: 36px 20px 36px 0;
  border-bottom: 1px solid var(--line);
}
.timeline-date {
  color: #7e8279;
  font:
    600 0.62rem/1.5 ui-monospace,
    monospace;
  text-transform: uppercase;
}
.timeline-row h3 {
  margin: 0 0 7px;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}
.timeline-row div p {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.7rem;
  font-weight: 650;
}
.timeline-row > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.65;
}
.timeline-dot {
  position: absolute;
  top: -4px;
  left: -3px;
  width: 7px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent-dark);
}
.timeline-row.education .timeline-dot {
  background: var(--ink);
}

.stack {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  gap: clamp(50px, 9vw, 150px);
}
.stack-heading .section-index {
  margin-bottom: 52px;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.stack-grid div {
  min-height: 230px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stack-grid div:last-child {
  grid-column: span 2;
  min-height: 180px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}
.stack-grid h3 {
  margin: 0 0 32px;
  color: var(--accent-dark);
  font:
    650 0.62rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.stack-grid div:last-child h3 {
  grid-column: span 2;
  margin-bottom: 10px;
}
.stack-grid p {
  margin: 0 0 9px;
  color: #555950;
  font-size: 0.8rem;
}

.contact {
  padding-block: 140px 110px;
  color: var(--paper);
  background: var(--ink);
}
.contact-inner {
  display: grid;
  grid-template-columns: 0.23fr 1.25fr 0.4fr;
  gap: clamp(28px, 5vw, 80px);
  align-items: end;
}
.contact .section-index {
  align-self: start;
  color: #6e736a;
}
.contact .eyebrow {
  color: var(--accent);
}
.contact h2 {
  margin: 0;
  font-size: clamp(4rem, 8vw, 8.3rem);
  font-weight: 600;
  line-height: 0.86;
  letter-spacing: -0.08em;
}
.contact-email {
  display: inline-block;
  margin-top: 48px;
  color: #b8bcb3;
  font:
    600 0.76rem/1 ui-monospace,
    monospace;
  text-decoration: none;
}
.contact-email span {
  color: var(--accent);
}
.contact-links {
  display: grid;
  gap: 0;
}
.contact-links a {
  display: flex;
  justify-content: space-between;
  padding: 17px 0;
  border-bottom: 1px solid var(--light-line);
  color: #b8bcb3;
  font-size: 0.72rem;
  font-weight: 650;
  text-decoration: none;
}
.contact-links a:hover {
  color: var(--accent);
}

.footer {
  color: #858a81;
  background: var(--ink);
}
.footer .wrap {
  min-height: 85px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--light-line);
  font:
    600 0.57rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.footer a {
  text-decoration: none;
}
.footer a:hover {
  color: var(--paper);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

@keyframes nav-in {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: none;
  }
}
@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}

@media (max-width: 1050px) {
  .hero-grid {
    grid-template-columns: 1fr 0.48fr;
    gap: 40px;
  }
  .hero-console {
    max-width: 310px;
  }
  .console-visual {
    height: 270px;
  }
  .ring-one {
    width: 215px;
    height: 215px;
  }
  .job-token.at-queue {
    transform: translateX(145px);
  }
  .job-token.at-worker {
    transform: translateX(290px);
  }
  .job-token.at-store {
    transform: translateX(435px);
  }
  .impact-item {
    padding-inline: 16px;
  }
}

@media (max-width: 850px) {
  .hero {
    min-height: auto;
  }
  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    padding: 180px 0 90px;
  }
  .hero-console {
    max-width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .console-bar {
    grid-column: span 2;
  }
  .console-data {
    border-top: 0;
    border-left: 1px solid var(--light-line);
  }
  .hero-foot {
    margin-top: 0;
  }
  .chapter-stamp {
    top: 112px;
  }
  .intro,
  .work-heading {
    grid-template-columns: 0.23fr 1fr;
  }
  .intro-aside,
  .work-note {
    grid-column: 2;
    padding-top: 0;
  }
  .case-card {
    grid-template-columns: 45px 1fr;
  }
  .case-diagram {
    grid-column: 2;
  }
  .impact-grid {
    grid-template-columns: repeat(2, 1fr);
    padding-block: 32px;
  }
  .impact-item:nth-child(2) {
    border-right: 0;
  }
  .lab {
    grid-template-columns: 1fr;
  }
  .queue-lab {
    width: 100%;
  }
  .project-grid,
  .timeline {
    margin-left: 0;
  }
  .principles,
  .stack {
    grid-template-columns: 1fr;
  }
  .contact-inner {
    grid-template-columns: 0.18fr 1fr;
  }
  .contact-links {
    grid-column: 2;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-top: 30px;
  }
}

@media (max-width: 640px) {
  :root {
    --wrap: calc(100vw - 28px);
  }
  .nav {
    height: 70px;
    grid-template-columns: 1fr auto;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding-inline: 14px;
  }
  .chapter-stamp {
    top: 98px;
    right: 14px;
    left: 14px;
    justify-content: space-between;
    gap: 10px;
  }
  .hero-grid {
    padding-top: 155px;
  }
  .hero h1 {
    font-size: clamp(3.5rem, 17vw, 5rem);
  }
  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }
  .hero-console {
    display: block;
  }
  .console-bar {
    grid-column: auto;
  }
  .console-data {
    border-top: 1px solid var(--light-line);
    border-left: 0;
  }
  .hero-foot p:last-child {
    display: none;
  }
  .section {
    padding-block: 88px;
  }
  .section h2 {
    font-size: clamp(3rem, 14vw, 4.7rem);
  }
  .intro,
  .work-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .intro-aside,
  .work-note {
    grid-column: auto;
  }
  .intro-main .large-copy {
    margin-top: 30px;
  }
  .case-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .case-diagram {
    grid-column: auto;
  }
  .case-content h3 {
    font-size: 2.45rem;
  }
  .impact-grid {
    grid-template-columns: 1fr 1fr;
  }
  .impact-item {
    min-height: 145px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
    border-bottom: 1px solid var(--light-line);
  }
  .impact-item:nth-child(3),
  .impact-item:nth-child(4) {
    border-bottom: 0;
  }
  .queue-stage {
    height: 420px;
    grid-template-columns: 1fr;
    grid-template-rows: repeat(4, 1fr);
    padding: 22px 38px;
    gap: 14px;
  }
  .queue-connectors {
    top: 10%;
    bottom: 10%;
    left: 50%;
    right: auto;
    border-top: 0;
    border-left: 1px dashed rgba(29, 32, 28, 0.4);
  }
  .queue-node {
    height: 75px;
  }
  .job-token {
    top: 11.5%;
    left: calc(50% - 17px);
  }
  .job-token.at-intake {
    transform: translateY(0);
  }
  .job-token.at-queue {
    transform: translateY(89px);
  }
  .job-token.at-worker {
    transform: translateY(178px);
  }
  .job-token.at-store {
    transform: translateY(267px);
  }
  .lab-log {
    grid-template-columns: 1fr 1fr;
  }
  .lab-log div:first-child {
    grid-column: span 2;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .project-grid {
    grid-template-columns: 1fr;
  }
  .project-card {
    min-height: 360px;
  }
  .side-heading,
  .experience-heading {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .principle-list li {
    grid-template-columns: 35px 1fr;
  }
  .principle-list p {
    grid-column: 2;
  }
  .timeline-row {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-left: 16px;
  }
  .stack-grid {
    grid-template-columns: 1fr;
  }
  .stack-grid div:last-child {
    grid-column: auto;
    display: block;
  }
  .stack-grid div:last-child h3 {
    grid-column: auto;
    margin-bottom: 32px;
  }
  .contact {
    padding-block: 100px 70px;
  }
  .contact-inner {
    grid-template-columns: 1fr;
  }
  .contact h2 {
    font-size: clamp(4rem, 19vw, 6.4rem);
  }
  .contact-links {
    grid-column: auto;
    grid-template-columns: 1fr;
    gap: 0;
  }
  .footer .wrap {
    padding-block: 28px;
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Chapter content after the opening keeps a quieter, more editorial rhythm. */
#chapter-content .intro.section {
  position: relative;
  grid-template-columns: 150px minmax(0, 1.12fr) minmax(220px, 0.62fr);
  gap: clamp(22px, 3vw, 44px);
  align-items: start;
  margin-block: 30px 100px;
  padding: clamp(38px, 6vw, 76px);
  border: 0;
  border-radius: 4px;
  color: var(--paper);
  background:
    radial-gradient(
      ellipse at 90% 0%,
      rgba(223, 255, 89, 0.1),
      transparent 36%
    ),
    var(--ink);
}

#chapter-content .intro .section-index {
  color: var(--accent);
}

#chapter-content .intro .eyebrow {
  color: var(--accent);
}

#chapter-content .intro h2 {
  max-width: 760px;
  font-size: clamp(2.8rem, 5.2vw, 5.5rem);
  line-height: 0.98;
}

#chapter-content .intro-main .large-copy {
  max-width: 700px;
  margin-top: 30px;
  color: #bdc2b8;
  font-size: clamp(1.12rem, 1.65vw, 1.5rem);
}

#chapter-content .intro-aside {
  padding: 42px 0 0;
  color: #aeb3a9;
  font-size: 0.86rem;
}

#chapter-content .work.section {
  padding-top: 30px;
  border-bottom: 0;
}

#chapter-content .work-heading {
  grid-template-columns: 0.2fr 1.2fr 0.5fr;
  margin-bottom: 42px;
}

#chapter-content .work-heading h2,
#chapter-content .side-heading h2,
#chapter-content .experience-heading h2,
#chapter-content .stack-heading h2 {
  max-width: 760px;
  font-size: clamp(2.8rem, 5vw, 5.3rem);
  line-height: 0.98;
}

#chapter-content .case-list {
  display: grid;
  gap: 14px;
  border: 0;
}

#chapter-content .case-card {
  position: relative;
  grid-template-columns: 42px minmax(0, 1.12fr) minmax(270px, 0.78fr);
  gap: clamp(22px, 3vw, 44px);
  min-height: 0;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.42);
  transition:
    border-color 200ms ease,
    transform 200ms ease,
    background-color 200ms ease;
}

#chapter-content .case-card:hover {
  transform: translateY(-3px);
  border-color: rgba(108, 131, 8, 0.42);
  background: #faf9f4;
}

#chapter-content .case-number {
  padding-top: 3px;
  color: var(--accent-dark);
}

#chapter-content .case-content h3 {
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.02;
}

#chapter-content .case-content > p:not(.case-type) {
  font-size: 0.88rem;
}

#chapter-content .case-diagram {
  min-height: 230px;
  border-radius: 3px;
}

#chapter-content .impact-band {
  margin-block: 22px 96px;
}

#chapter-content .impact-grid {
  min-height: 205px;
}

#chapter-content .impact-item {
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 18px;
  padding: 26px;
}

#chapter-content .impact-item strong {
  font-size: clamp(2.8rem, 3.5vw, 4.2rem);
}

#chapter-content .impact-item > span {
  max-width: 180px;
  color: #b4b9ae;
  font-size: 0.72rem;
}

#chapter-content .lab.section {
  gap: clamp(36px, 6vw, 86px);
  margin-bottom: 36px;
  padding: clamp(34px, 6vw, 72px);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper-2);
}

#chapter-content .lab-copy .section-index,
#chapter-content .principles-heading .section-index,
#chapter-content .stack-heading .section-index {
  margin-bottom: 32px;
}

#chapter-content .lab-copy h2 {
  font-size: clamp(2.65rem, 4.4vw, 4.5rem);
  line-height: 0.98;
}

#chapter-content .lab .queue-lab {
  box-shadow: 0 18px 55px rgba(29, 32, 28, 0.1);
}

#chapter-content .side-projects.section,
#chapter-content .experience.section,
#chapter-content .stack.section {
  padding-block: 92px;
  border-bottom: 1px solid var(--line);
}

#chapter-content .project-grid,
#chapter-content .timeline {
  margin-left: calc(17% + 24px);
}

#chapter-content .project-grid {
  gap: 14px;
}

#chapter-content .project-card {
  min-height: 360px;
  border-radius: 4px;
}

#chapter-content .project-card h3 {
  margin-top: 62px;
  font-size: clamp(1.9rem, 3vw, 3rem);
}

#chapter-content .principles.section {
  grid-template-columns: 0.48fr 1fr;
  gap: clamp(36px, 6vw, 90px);
  padding-block: 100px;
  border-bottom: 1px solid var(--line);
}

#chapter-content .principles-heading h2 {
  font-size: clamp(2.8rem, 4.5vw, 4.7rem);
  line-height: 0.98;
}

#chapter-content .principle-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  border: 0;
}

#chapter-content .principle-list li {
  display: flex;
  min-height: 245px;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.42);
}

#chapter-content .principle-list h3 {
  margin-top: auto;
  font-size: 1.25rem;
}

#chapter-content .timeline {
  border-top-color: rgba(29, 32, 28, 0.22);
}

#chapter-content .timeline-row {
  grid-template-columns: 0.55fr 0.85fr 1fr;
  gap: 24px;
  padding-block: 30px;
}

#chapter-content .timeline-row h3 {
  font-size: 1.2rem;
}

#chapter-content .stack-grid {
  gap: 10px;
  border: 0;
}

#chapter-content .stack-grid div,
#chapter-content .stack-grid div:last-child {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.42);
}

#chapter-content .stack-grid div:last-child {
  grid-column: auto;
  display: block;
}

#chapter-content .stack-grid div:last-child h3 {
  margin-bottom: 32px;
}

#chapter-content .contact {
  margin-top: 30px;
}

@media (max-width: 850px) {
  #chapter-content .intro.section {
    grid-template-columns: 1fr 1.7fr;
    gap: 24px;
    margin-bottom: 64px;
  }

  #chapter-content .intro-aside {
    grid-column: 2;
    padding-top: 0;
  }

  #chapter-content .case-card {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  #chapter-content .case-diagram {
    grid-column: 2;
  }

  #chapter-content .lab.section {
    padding: 38px;
  }

  #chapter-content .principles.section {
    grid-template-columns: 1fr;
  }

  #chapter-content .principle-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  #chapter-content .side-projects.section,
  #chapter-content .experience.section,
  #chapter-content .stack.section {
    padding-block: 70px;
  }
}

@media (max-width: 640px) {
  #chapter-content .intro.section {
    grid-template-columns: 1fr;
    gap: 22px;
    margin-block: 16px 58px;
    padding: 30px 24px;
  }

  #chapter-content .intro-aside {
    grid-column: auto;
  }

  #chapter-content .work.section {
    padding-top: 20px;
  }

  #chapter-content .work-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  #chapter-content .work-note {
    grid-column: auto;
  }

  #chapter-content .case-card {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  #chapter-content .case-diagram {
    grid-column: auto;
  }

  #chapter-content .impact-band {
    margin-bottom: 58px;
  }

  #chapter-content .impact-grid {
    min-height: 0;
  }

  #chapter-content .impact-item {
    min-height: 135px;
    padding: 16px;
  }

  #chapter-content .lab.section {
    width: var(--wrap);
    gap: 28px;
    padding: 28px 20px;
  }

  #chapter-content .principles.section {
    padding-block: 68px;
  }

  #chapter-content .principle-list {
    grid-template-columns: 1fr;
  }

  #chapter-content .principle-list li {
    min-height: 185px;
  }

  #chapter-content .project-grid,
  #chapter-content .timeline {
    margin-left: 0;
  }

  #chapter-content .stack-grid div,
  #chapter-content .stack-grid div:last-child {
    min-height: 0;
    padding: 20px;
  }
}