:root {
  color-scheme: light;
  --ink: #122c43;
  --muted: #526475;
  --paper: #fff;
  --blue: #174fd6;
  --rule: #d3dce3;
  --wash: #f1f5f9;
  --orange: #ae3c19;
  --body: clamp(18px, 1.7vw, 28px);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--body);
  line-height: 1.4;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.19em;
}
a:hover {
  color: var(--blue);
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 1px solid var(--rule);
  background: white;
  border-radius: 4px;
  padding: 0.5em 0.8em;
}
button:hover {
  background: var(--wash);
}
button:disabled {
  opacity: 0.35;
  cursor: default;
}
button[aria-pressed="true"] {
  background: var(--ink);
  color: white;
  border-color: var(--ink);
}
:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}
.skip {
  position: fixed;
  left: 20px;
  top: -100px;
  background: white;
  padding: 12px;
  z-index: 20;
}
.skip:focus {
  top: 10px;
}
.masthead {
  height: 80px;
  padding: 0 4.3vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
  gap: 20px;
  font-size: 14px;
}
.brand {
  text-decoration: none;
  font-weight: 750;
  font-size: 17px;
  white-space: nowrap;
}
.brand span {
  font-size: 13px;
  margin-left: 22px;
  font-weight: 400;
  color: var(--muted);
}
.tools {
  display: flex;
  gap: 8px;
}
.tools button {
  font-size: 13px;
}
.slide {
  max-width: 1600px;
  margin: auto;
  padding: 3.6vh 5.4vw 2.6vh;
  min-height: calc(100svh - 148px);
  display: flex;
  flex-direction: column;
}
.slide[hidden] {
  display: none;
}
.eyebrow,
.label {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}
.eyebrow {
  color: var(--muted);
  margin: 0 0 1.3vh;
}
.label {
  display: block;
  color: var(--muted);
}
h1 {
  font-size: clamp(32px, 3.9vw, 64px);
  line-height: 1.09;
  letter-spacing: -0.045em;
  margin: 0 0 3.5vh;
  font-weight: 650;
}
h2 {
  font-size: 1.15em;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0.6em 0;
}
p {
  margin: 0 0 1em;
}
.small,
.slide-foot {
  font-size: clamp(14px, 1.02vw, 17px);
  line-height: 1.5;
  color: var(--muted);
}
.slide-foot {
  margin: 2.6vh 0 0;
  padding-top: 1.6vh;
  border-top: 1px solid var(--rule);
}
.definition-layout {
  display: grid;
  grid-template-columns: 1.24fr 1fr;
  gap: 6vw;
  flex: 1;
  align-items: start;
}
.definitions {
  margin: 0;
}
.definitions > div {
  display: grid;
  grid-template-columns: 155px 1fr;
  gap: 24px;
  border-top: 1px solid var(--rule);
  padding: 1.9vh 0;
}
.definitions dt {
  font-weight: 650;
}
.definitions dd {
  margin: 0;
  font-size: 0.86em;
}
.example {
  border-left: 3px solid var(--blue);
  padding: 2vh 0 0 2.4vw;
}
.example h2 {
  font-family: Georgia, serif;
  font-weight: 400;
  font-size: clamp(29px, 3vw, 47px);
  line-height: 1.2;
  margin: 0.6em 0;
}
.example > p {
  font-size: 0.85em;
}
.example > p.small {
  font-size: 16px;
  margin-top: 2em;
  max-width: 32ch;
}
.landscape {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85em;
}
.landscape th,
.landscape td {
  text-align: left;
  vertical-align: middle;
  padding: 1.7vh 1.3vw;
  border-bottom: 1px solid var(--rule);
}
.landscape thead th {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
  padding-top: 0;
}
.landscape tbody th {
  font-weight: 550;
  width: 30%;
}
.landscape th:first-child {
  padding-left: 0;
}
.landscape td:last-child {
  color: var(--muted);
}
.takeaway {
  display: grid;
  grid-template-columns: 27% 1fr;
  gap: 2vw;
  background: var(--wash);
  padding: 1.8vh 1.8vw;
  margin-top: 2.3vh;
  align-items: center;
}
.takeaway p {
  margin: 0;
  font-size: 0.95em;
}
.takeaway .label {
  color: var(--blue);
}
blockquote {
  font-family: Georgia, serif;
  font-size: clamp(29px, 3.2vw, 50px);
  line-height: 1.22;
  margin: 0 0 2.5vh;
  color: var(--ink);
}
blockquote cite {
  display: block;
  font-family: Inter, Arial, sans-serif;
  font-style: normal;
  font-size: 14px;
  color: var(--muted);
  margin-top: 1em;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.3vh 0 1.8vh;
  gap: 2vw;
}
.metrics > div {
  display: flex;
  flex-direction: column;
}
.metrics strong {
  font-size: clamp(40px, 4.5vw, 70px);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.2;
}
.metrics span {
  font-size: 17px;
  color: var(--muted);
}
.split-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5vw;
  margin-top: 2.8vh;
  font-size: 0.8em;
}
.split-summary p {
  margin: 0;
}
.split-summary strong {
  display: block;
  margin-bottom: 0.3em;
  font-weight: 600;
}
.intro {
  font-size: 0.9em;
  color: var(--muted);
  margin: -1vh 0 2.5vh;
  max-width: 80ch;
}
.demo-slide {
  background: var(--ink);
  color: white;
  max-width: none;
}
.demo-slide .eyebrow,
.demo-slide .intro,
.demo-slide .slide-foot {
  color: #c5d2df;
}
.demo-slide a:hover {
  color: #8fc6ff;
}
.demo-slide .slide-foot {
  border-color: #486175;
}
.demo-steps {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3vh 5vw;
  padding: 0;
  margin: 0;
}
.demo-steps li {
  display: flex;
  gap: 20px;
  border-top: 1px solid #486175;
  padding-top: 1.5vh;
}
.step-number {
  font-family: Georgia, serif;
  color: #93b9ff;
  font-size: 42px;
  line-height: 1.25;
}
.demo-steps h2 {
  margin: 0.2em 0 0.45em;
  font-size: 1.05em;
}
.demo-steps p {
  color: #c5d2df;
  font-size: 0.8em;
  max-width: 36ch;
}
.demo-steps code {
  display: block;
  color: #fff;
  font-size: clamp(13px, 1.06vw, 17px);
  line-height: 1.65;
  overflow-wrap: anywhere;
  max-width: 49ch;
  background: #203d55;
  border-left: 2px solid #93b9ff;
  padding: 12px 14px;
}
.feedback-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 5vw;
  flex: 1;
  align-items: start;
}
.feedback-example {
  padding: 2.3vh 2vw;
  background: var(--wash);
  border-top: 3px solid var(--blue);
}
.feedback-example h2 {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: clamp(15px, 1.5vw, 24px);
  overflow-wrap: anywhere;
  margin: 1em 0;
}
.feedback-example dl {
  margin: 0;
}
.feedback-example dl > div {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
  padding: 1.2vh 0;
  border-top: 1px solid var(--rule);
  font-size: 0.8em;
}
.feedback-example dt {
  color: var(--muted);
  font-size: 0.9em;
}
.feedback-example dd {
  margin: 0;
}
.feedback-example > .small {
  margin: 1.8vh 0 0;
  font-size: 14px;
}
.feedback-purpose {
  padding-top: 1vh;
  font-size: 0.86em;
}
.feedback-purpose .large {
  font-family: Georgia, serif;
  font-size: clamp(27px, 2.8vw, 44px);
  line-height: 1.18;
}
.feedback-purpose .small {
  margin-top: 2em;
}
.feedback-purpose code {
  font-size: 0.95em;
}
.group-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.4vw;
  margin: 1vh 0 2.5vh;
}
.group-options article {
  border-top: 3px solid var(--rule);
  padding-top: 2vh;
}
.group-options h2 {
  font-size: 1.1em;
  margin: 0.65em 0;
}
.group-options p {
  font-size: 0.83em;
}
.group-options .label {
  font-size: 12px;
}
.group-options .tradeoff {
  font-size: 0.72em;
  color: var(--muted);
  margin-bottom: 0;
}
.group-options .proposed {
  border-color: var(--blue);
}
.group-options .proposed .label {
  color: var(--blue);
}
.pilot {
  padding: 1.6vh 1.8vw;
  background: var(--wash);
  font-size: 0.9em;
}
.pilot strong {
  font-weight: 600;
}
.pilot p {
  font-size: 0.85em;
  color: var(--muted);
  margin: 0.5em 0 0;
}
.controls {
  min-height: 68px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 4.3vw;
  gap: 16px;
  background: white;
  font-size: 14px;
}
.footer-label span {
  color: var(--muted);
  margin-left: 16px;
}
.controls nav {
  display: flex;
  align-items: center;
  gap: 10px;
}
.controls nav > button {
  font-size: 20px;
  line-height: 1;
  padding: 7px 12px;
}
.controls #slide-links {
  display: flex;
  gap: 5px;
}
.controls #slide-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 35px;
  height: 35px;
  text-decoration: none;
  font-size: 13px;
  border-radius: 50%;
}
.controls a[aria-current="true"] {
  background: var(--ink);
  color: white;
}
.position {
  font-family: monospace;
  color: var(--muted);
  min-width: 70px;
  text-align: right;
}
.notes-panel {
  position: fixed;
  z-index: 5;
  right: 20px;
  top: 90px;
  bottom: 80px;
  width: min(470px, calc(100% - 40px));
  background: white;
  box-shadow: 0 8px 60px #122c4340;
  border: 1px solid var(--rule);
  padding: 24px;
  overflow: auto;
  font-size: 17px;
  line-height: 1.6;
}
.notes-heading,
.dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.notes-heading h2 {
  font-size: 20px;
}
.notes-heading button,
.dialog-heading button {
  font-size: 14px;
}
.notes-panel .small {
  font-size: 14px;
}
dialog {
  width: min(800px, calc(100% - 32px));
  max-height: 85svh;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 28px 36px;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
}
dialog::backdrop {
  background: #122c4380;
}
dialog h2 {
  font-size: 27px;
}
dialog h3 {
  font-size: 18px;
  margin: 1.5em 0 0.4em;
}
dialog ul {
  padding-left: 1.2em;
}
dialog li {
  margin: 0.45em 0;
}
.noscript {
  padding: 20px;
}
.overview .slide {
  min-height: initial;
  padding-bottom: 55px;
  border-bottom: 1px solid var(--rule);
  padding-top: 45px;
}
.overview .controls {
  position: sticky;
  bottom: 0;
}
.overview .slide + .slide {
  margin-top: 0;
}
.overview h1 {
  scroll-margin-top: 20px;
}
@media (min-width: 1600px) {
  .slide {
    padding-left: 85px;
    padding-right: 85px;
  }
  .demo-slide {
    padding-left: max(85px, calc((100vw - 1430px) / 2));
    padding-right: max(85px, calc((100vw - 1430px) / 2));
  }
}
@media (max-width: 900px) {
  body {
    padding-bottom: 68px;
  }
  .masthead {
    height: auto;
    min-height: 70px;
    padding: 14px 5vw;
    flex-wrap: wrap;
    gap: 12px;
  }
  .brand span {
    margin-left: 12px;
  }
  .tools {
    gap: 5px;
  }
  .tools button {
    font-size: 12px;
    padding: 0.5em 0.65em;
  }
  .slide {
    padding: 28px 6vw;
    min-height: calc(100svh - 140px);
  }
  h1 {
    margin-bottom: 26px;
    letter-spacing: -0.03em;
  }
  .definition-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .definitions > div {
    grid-template-columns: 130px 1fr;
    padding: 13px 0;
  }
  .definitions dd {
    font-size: 18px;
  }
  .example {
    padding: 0 0 0 20px;
  }
  .example h2 {
    font-size: 30px;
  }
  .example > p {
    font-size: 18px;
  }
  .example > p.small {
    margin-top: 1em;
  }
  .landscape {
    font-size: 17px;
  }
  .landscape th,
  .landscape td {
    padding: 14px 10px;
  }
  .landscape thead th {
    font-size: 12px;
  }
  .landscape tbody th {
    width: 29%;
  }
  .takeaway {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 20px;
  }
  .takeaway p {
    font-size: 19px;
  }
  .metrics {
    padding: 20px 0;
    gap: 16px;
  }
  .metrics span {
    font-size: 14px;
  }
  .split-summary {
    font-size: 18px;
    gap: 24px;
  }
  .demo-steps {
    gap: 24px;
  }
  .demo-steps code {
    font-size: 13px;
  }
  .demo-steps p {
    font-size: 17px;
  }
  .demo-steps li {
    gap: 12px;
  }
  .feedback-layout {
    gap: 25px;
  }
  .feedback-example {
    padding: 20px;
  }
  .feedback-example dl > div {
    grid-template-columns: 1fr;
    gap: 6px;
    font-size: 18px;
  }
  .feedback-purpose {
    font-size: 19px;
  }
  .group-options {
    gap: 20px;
  }
  .group-options p {
    font-size: 17px;
  }
  .group-options .tradeoff {
    font-size: 15px;
  }
  .group-options h2 {
    font-size: 22px;
  }
  .group-options .label {
    font-size: 12px;
  }
  .pilot {
    padding: 20px;
    font-size: 19px;
  }
  .footer-label {
    display: none;
  }
  .controls {
    padding: 10px 5vw;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 4;
  }
  .slide-foot {
    margin-top: 25px;
    padding-top: 15px;
    font-size: 14px;
  }
  .label,
  .eyebrow {
    font-size: 12px;
  }
}
@media (max-width: 600px) {
  .tools #fullscreen {
    display: none;
  }
  .brand span {
    font-size: 12px;
  }
  .tools {
    width: 100%;
  }
  .slide {
    min-height: calc(100svh - 185px);
  }
  .definitions > div {
    grid-template-columns: 110px 1fr;
    gap: 16px;
  }
  .definitions dt {
    font-size: 18px;
  }
  .definitions dd {
    font-size: 17px;
  }
  .example h2 br {
    display: none;
  }
  .landscape {
    font-size: 14px;
  }
  .landscape th,
  .landscape td {
    padding: 12px 7px;
  }
  .landscape thead th {
    font-size: 12px;
  }
  .landscape th:first-child {
    width: 28%;
  }
  .landscape td:last-child {
    width: 30%;
  }
  .landscape a {
    overflow-wrap: anywhere;
  }
  .metrics {
    grid-template-columns: 1fr 1fr;
    row-gap: 18px;
  }
  .metrics strong {
    font-size: 48px;
  }
  .split-summary,
  .demo-steps,
  .feedback-layout,
  .group-options {
    grid-template-columns: 1fr;
  }
  .demo-steps h2 {
    font-size: 23px;
  }
  .demo-steps code {
    font-size: 14px;
    max-width: none;
  }
  .group-options {
    gap: 20px;
  }
  .group-options h2 {
    margin: 0.5em 0;
  }
  .group-options p {
    margin-bottom: 0.7em;
  }
  .group-options .label {
    font-size: 13px;
  }
  .controls #slide-links {
    gap: 1px;
  }
  .controls #slide-links a {
    width: 29px;
    height: 31px;
  }
  .controls nav {
    gap: 5px;
  }
  .position {
    font-size: 12px;
    min-width: 54px;
  }
  .controls nav > button {
    padding: 7px 10px;
  }
  .notes-panel {
    top: 130px;
  }
  dialog {
    padding: 20px;
  }
  dialog h2 {
    font-size: 23px;
  }
  .feedback-example dl > div {
    grid-template-columns: 85px 1fr;
  }
  .feedback-purpose .small {
    margin-top: 1em;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
@media print {
  @page {
    size: landscape;
    margin: 8mm;
  }
  .masthead,
  .controls,
  .notes-panel,
  dialog,
  .skip,
  .noscript {
    display: none !important;
  }
  body {
    font-size: 16px;
    color: #122c43;
  }
  .slide,
  .slide[hidden] {
    display: flex !important;
    break-after: page;
    min-height: 180mm;
    padding: 7mm 10mm;
    max-width: none;
    margin: 0 !important;
    background: white !important;
    color: #122c43 !important;
    border: 0 !important;
  }
  .slide:last-child {
    break-after: auto;
  }
  h1 {
    font-size: 32px;
    margin-bottom: 18px;
  }
  .eyebrow {
    font-size: 11px;
  }
  .label {
    font-size: 11px;
  }
  .slide-foot {
    font-size: 11px;
    margin-top: 18px;
  }
  .definition-layout {
    grid-template-columns: 1.2fr 1fr;
    gap: 35px;
  }
  .example h2 {
    font-size: 30px;
  }
  .definitions > div {
    padding: 12px 0;
  }
  .definitions dd {
    font-size: 16px;
  }
  .landscape {
    font-size: 16px;
  }
  .landscape th,
  .landscape td {
    padding: 12px;
  }
  .takeaway {
    padding: 15px;
    margin-top: 15px;
  }
  .metrics strong {
    font-size: 45px;
  }
  .metrics span {
    font-size: 13px;
  }
  blockquote {
    font-size: 32px;
  }
  .split-summary {
    font-size: 16px;
  }
  .demo-steps {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }
  .demo-steps p,
  .demo-slide .intro,
  .demo-slide .eyebrow,
  .demo-slide .slide-foot {
    color: #526475;
  }
  .demo-steps code {
    background: #f1f5f9;
    color: #122c43;
    font-size: 12px;
  }
  .step-number {
    color: #174fd6;
  }
  .feedback-layout {
    grid-template-columns: 1fr 1fr;
  }
  .feedback-example dl > div {
    font-size: 16px;
  }
  .feedback-purpose .large {
    font-size: 30px;
  }
  .feedback-purpose {
    font-size: 17px;
  }
  .group-options {
    grid-template-columns: repeat(3, 1fr);
  }
  .group-options p {
    font-size: 16px;
  }
  .group-options .tradeoff {
    font-size: 13px;
  }
  .pilot {
    font-size: 17px;
  }
  a {
    color: inherit;
    text-decoration: underline;
  }
}
@media screen and (max-height: 700px) and (min-width: 901px) {
  body {
    font-size: 18px;
  }
  .masthead {
    height: 52px;
  }
  .controls {
    min-height: 48px;
    padding-top: 5px;
    padding-bottom: 5px;
  }
  .slide {
    min-height: calc(100svh - 100px);
    padding-top: 16px;
    padding-bottom: 14px;
  }
  .eyebrow {
    font-size: 12px;
    margin-bottom: 8px;
  }
  h1 {
    font-size: 36px;
    margin-bottom: 18px;
  }
  .definitions > div {
    padding: 9px 0;
    grid-template-columns: 130px 1fr;
    gap: 18px;
  }
  .definitions dd {
    font-size: 16px;
  }
  .example {
    padding-top: 5px;
  }
  .example h2 {
    font-size: 29px;
    margin: 0.5em 0;
  }
  .example > p {
    font-size: 16px;
  }
  .example > p.small {
    font-size: 14px;
    margin-top: 1em;
  }
  .slide-foot {
    font-size: 12px;
    margin-top: 16px;
    padding-top: 10px;
  }
  .landscape {
    font-size: 16px;
  }
  .landscape th,
  .landscape td {
    padding-top: 9px;
    padding-bottom: 9px;
  }
  .landscape thead th {
    font-size: 12px;
  }
  .takeaway {
    padding: 12px 18px;
    margin-top: 14px;
  }
  .takeaway .label {
    font-size: 12px;
  }
  .takeaway p {
    font-size: 17px;
  }
  blockquote {
    font-size: 32px;
    margin-bottom: 16px;
  }
  blockquote cite {
    font-size: 12px;
    margin-top: 10px;
  }
  .metrics {
    padding: 8px 0 12px;
  }
  .metrics strong {
    font-size: 44px;
  }
  .metrics span {
    font-size: 14px;
  }
  .split-summary {
    font-size: 16px;
    margin-top: 18px;
  }
  .intro {
    font-size: 16px;
    margin: 0 0 16px;
  }
  .demo-steps {
    gap: 16px 4vw;
  }
  .demo-steps li {
    padding-top: 10px;
    gap: 14px;
  }
  .demo-steps h2 {
    font-size: 20px;
    margin: 0 0 7px;
  }
  .demo-steps p {
    font-size: 15px;
    margin-bottom: 10px;
  }
  .demo-steps code {
    font-size: 12px;
    padding: 8px 10px;
  }
  .step-number {
    font-size: 32px;
  }
  .feedback-example {
    padding: 16px 20px;
  }
  .feedback-example h2 {
    font-size: 18px;
  }
  .feedback-example dl > div {
    font-size: 15px;
    padding: 8px 0;
  }
  .feedback-example .label {
    font-size: 11px;
  }
  .feedback-purpose {
    font-size: 17px;
  }
  .feedback-purpose .large {
    font-size: 30px;
  }
  .feedback-purpose .small {
    font-size: 13px;
    margin-top: 16px;
  }
  .group-options {
    margin-top: 0;
    gap: 24px;
  }
  .group-options article {
    padding-top: 12px;
  }
  .group-options h2 {
    font-size: 23px;
  }
  .group-options p {
    font-size: 16px;
  }
  .group-options .tradeoff {
    font-size: 14px;
  }
  .pilot {
    font-size: 18px;
    padding: 12px 18px;
  }
  .pilot p {
    font-size: 15px;
  }
  .notes-panel {
    top: 62px;
    bottom: 58px;
  }
}