:root {
  --paper: #f7f6f3;
  --paper-raised: #efece5;
  --ink: #111112;
  --hair: #d5d3cd;
  --muted: #77746c;
  --signal: #b3401f;
  --sans: "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;
  --page-x: clamp(20px, 5vw, 72px);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.02;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.shell {
  min-height: 100svh;
  padding: 30px var(--page-x) 0;
}

.header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ink);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.brand-logo {
  display: block;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  object-fit: contain;
  background: #fff;
}

.tagline {
  margin-right: auto;
}

nav {
  display: flex;
  gap: 18px;
}

.label {
  color: var(--muted);
  font: 500 10px/1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.numeric {
  font-variant-numeric: tabular-nums;
}

.text-link {
  position: relative;
  padding-bottom: 4px;
}

.text-link::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 300ms var(--ease);
}

.text-link:hover::after {
  transform: scaleX(1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.45fr);
  gap: clamp(36px, 8vw, 120px);
  align-items: end;
  min-height: min(690px, 78svh);
  padding: clamp(86px, 14vh, 160px) 0 clamp(68px, 10vh, 110px);
}

.eyebrow {
  margin-bottom: 22px;
  color: var(--signal);
}

h1 {
  max-width: 980px;
  font-size: clamp(58px, 8.7vw, 142px);
  letter-spacing: -0.065em;
}

h1 i,
.status h2 i {
  font-family: var(--serif);
  font-weight: 400;
}

.hero-aside {
  padding-bottom: 10px;
}

.lede {
  max-width: 430px;
  color: #343432;
  font-size: clamp(18px, 2vw, 26px);
  letter-spacing: -0.028em;
  line-height: 1.25;
}

.button {
  display: inline-flex;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
  min-width: 218px;
  margin-top: 34px;
  padding: 14px 17px;
  border: 1px solid var(--ink);
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition:
    background 280ms var(--ease),
    color 280ms var(--ease);
}

.button:hover {
  background: var(--ink);
  color: var(--paper);
}

.rule {
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  animation: draw 1s var(--ease) 150ms forwards;
}

@keyframes draw {
  to {
    transform: scaleX(1);
  }
}

.index-preview {
  padding-bottom: clamp(100px, 13vw, 190px);
}

.index-head,
.index-row {
  display: grid;
  grid-template-columns: 44px 72px minmax(0, 1fr) 100px;
  gap: 18px;
  align-items: center;
}

.index-head {
  grid-template-columns: 1fr auto;
  padding: 18px 0;
  border-bottom: 1px solid var(--hair);
}

.index-row {
  min-height: 114px;
  border-bottom: 1px solid var(--hair);
}

.rank {
  align-self: start;
  padding-top: 32px;
}

.mark {
  position: relative;
  width: 62px;
  height: 62px;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--paper-raised);
}

.mark-circle::after {
  position: absolute;
  inset: 17px;
  border-radius: 50%;
  background: var(--ink);
  content: "";
}

.mark-lines::before,
.mark-lines::after {
  position: absolute;
  left: 15px;
  height: 5px;
  background: var(--ink);
  content: "";
}

.mark-lines::before {
  top: 22px;
  width: 34px;
}

.mark-lines::after {
  top: 35px;
  width: 22px;
}

.mark-triangle::after {
  position: absolute;
  top: 15px;
  left: 14px;
  border-right: 17px solid transparent;
  border-bottom: 32px solid var(--ink);
  border-left: 17px solid transparent;
  content: "";
}

.item-copy h2 {
  font-size: clamp(19px, 2.2vw, 31px);
}

.item-copy p {
  margin-top: 9px;
}

.metric {
  text-align: right;
}

.metric span {
  display: block;
  margin-bottom: 9px;
}

.metric strong {
  font-size: 26px;
  font-weight: 500;
}

.method,
.principles {
  display: grid;
  grid-template-columns: minmax(230px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(50px, 9vw, 150px);
  padding: clamp(90px, 12vw, 170px) 0;
  border-top: 1px solid var(--ink);
}

.section-intro .label {
  display: block;
  margin-bottom: 24px;
  color: var(--signal);
}

.section-intro h2 {
  max-width: 540px;
  font-size: clamp(43px, 5vw, 78px);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 45px minmax(160px, 0.65fr) minmax(220px, 1fr);
  gap: 22px;
  padding: 30px 0;
  border-bottom: 1px solid var(--hair);
}

.steps li:first-child {
  padding-top: 0;
}

.steps h3 {
  font-size: 22px;
}

.steps p,
.principle p {
  color: var(--muted);
  line-height: 1.55;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--hair);
  border-left: 1px solid var(--hair);
}

.principle {
  min-height: 180px;
  padding: 28px;
  border-right: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.principle .label {
  color: var(--signal);
}

.principle p {
  max-width: 310px;
  margin-top: 36px;
  font-size: 18px;
}

.status {
  display: grid;
  grid-template-columns: 0.45fr 1.15fr 0.65fr;
  gap: 40px;
  align-items: end;
  padding: clamp(90px, 13vw, 180px) 0;
  border-top: 1px solid var(--ink);
}

.status > .label {
  align-self: start;
}

.status h2 {
  font-size: clamp(48px, 6.6vw, 100px);
}

.status > p:last-child {
  color: var(--muted);
  font-size: 18px;
}

footer {
  display: grid;
  grid-template-columns: 0.35fr 1fr auto;
  gap: 28px;
  align-items: start;
  padding: 22px 0 28px;
  border-top: 1px solid var(--hair);
}

.disclaimer {
  max-width: 760px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 750ms var(--ease),
    transform 750ms var(--ease);
}

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

.delay-1 {
  transition-delay: 100ms;
}

.delay-2 {
  transition-delay: 180ms;
}

.delay-3 {
  transition-delay: 260ms;
}

@media (max-width: 900px) {
  .hero,
  .method,
  .principles,
  .status {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 54px;
    min-height: auto;
  }

  .hero-aside {
    max-width: 600px;
  }

  .method,
  .principles {
    gap: 70px;
  }

  .status {
    align-items: start;
  }
}

@media (max-width: 650px) {
  .shell {
    padding-top: 22px;
  }

  .tagline {
    display: none;
  }

  .header {
    justify-content: space-between;
  }

  nav {
    gap: 13px;
  }

  .hero {
    padding: 90px 0 70px;
  }

  h1 {
    font-size: clamp(52px, 15vw, 76px);
  }

  .index-head,
  .index-row {
    grid-template-columns: 32px 52px minmax(0, 1fr);
    gap: 11px;
  }

  .index-head {
    grid-template-columns: 1fr auto;
  }

  .index-row {
    min-height: 98px;
  }

  .mark {
    width: 48px;
    height: 48px;
  }

  .mark-circle::after {
    inset: 13px;
  }

  .mark-lines::before,
  .mark-lines::after {
    left: 11px;
  }

  .mark-lines::before {
    top: 17px;
    width: 27px;
  }

  .mark-lines::after {
    top: 28px;
    width: 18px;
  }

  .mark-triangle::after {
    top: 11px;
    left: 10px;
    border-right-width: 13px;
    border-bottom-width: 26px;
    border-left-width: 13px;
  }

  .metric {
    display: none;
  }

  .rank {
    padding-top: 24px;
  }

  .item-copy h2 {
    font-size: 19px;
  }

  .steps li {
    grid-template-columns: 35px 1fr;
  }

  .steps p {
    grid-column: 2;
  }

  .principle-grid {
    grid-template-columns: 1fr;
  }

  .principle {
    min-height: 155px;
  }

  footer {
    grid-template-columns: 1fr auto;
  }

  .disclaimer {
    grid-row: 2;
    grid-column: 1 / -1;
  }
}

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

  .rule,
  .reveal {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
}