:root {
  --paper: #f1efe8;
  --paper-soft: #e8e5dd;
  --white: #faf9f5;
  --ink: #11120f;
  --muted: #65655e;
  --line: rgba(17, 18, 15, 0.18);
  --blue: #3157ff;
  --blue-soft: #dce3ff;
  --header-height: 74px;
  --page-x: clamp(24px, 5vw, 84px);
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: var(--header-height);
  padding: 0 var(--page-x);
  border-bottom: 1px solid transparent;
  transition: background-color 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(241, 239, 232, 0.84);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.035em;
}

.brand__mark {
  width: 26px;
  height: auto;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand__mark circle {
  fill: currentColor;
  stroke: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  color: #41413c;
  font-size: 13px;
}

.site-nav a,
.header-dev,
.site-footer > a {
  position: relative;
}

.site-nav a::after,
.header-dev::after,
.site-footer > a::after {
  position: absolute;
  right: 0;
  bottom: -5px;
  left: 0;
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.header-dev:hover::after,
.site-footer > a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-dev {
  justify-self: end;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.hero {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100svh;
  padding: calc(var(--header-height) + 44px) var(--page-x) 36px;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 0;
  right: -12vw;
  width: 56vw;
  height: 56vw;
  max-width: 860px;
  max-height: 860px;
  content: "";
  border-radius: 50%;
  background: radial-gradient(circle, rgba(49, 87, 255, 0.13) 0%, rgba(49, 87, 255, 0.035) 48%, transparent 70%);
  pointer-events: none;
}

.hero__meta,
.handoff__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.signal {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.signal i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(49, 87, 255, 0.1);
}

.hero__copy {
  align-self: center;
  padding: clamp(54px, 8vh, 112px) 0 48px;
}

.hero h1 {
  max-width: 1500px;
  font-size: clamp(76px, 12.2vw, 186px);
  font-weight: 560;
  line-height: 0.82;
  letter-spacing: -0.085em;
}

.hero__concept {
  margin-top: clamp(30px, 4vw, 56px);
  font-size: clamp(27px, 3.2vw, 52px);
  font-weight: 450;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

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

.hero__body {
  max-width: 630px;
  margin-top: 18px;
  color: #4f504a;
  font-size: clamp(17px, 1.5vw, 22px);
  line-height: 1.45;
  letter-spacing: -0.02em;
}

.hero__footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.hero__footer > p {
  justify-self: end;
  max-width: 430px;
  color: #40413c;
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: -0.012em;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-width: 184px;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 560;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

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

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

.button--dark:hover {
  background: var(--blue);
}

.button--line {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.16);
}

.button--line:hover {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.42);
}

.concept {
  display: grid;
  grid-template-columns: minmax(150px, 0.68fr) minmax(420px, 1.65fr) minmax(210px, 0.7fr);
  gap: clamp(28px, 5vw, 88px);
  min-height: 650px;
  padding: clamp(100px, 12vw, 172px) var(--page-x);
  border-top: 1px solid var(--line);
}

.concept--light {
  background: var(--white);
}

.concept--paper {
  background: var(--paper-soft);
}

.concept__index,
.interface__label {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.concept__copy {
  align-self: start;
}

.concept h2,
.interface h2 {
  max-width: 900px;
  font-size: clamp(40px, 5.1vw, 76px);
  font-weight: 520;
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.concept__copy > p,
.interface__copy > p {
  max-width: 650px;
  margin-top: clamp(32px, 4vw, 54px);
  color: #4c4d47;
  font-size: clamp(17px, 1.45vw, 21px);
  line-height: 1.55;
  letter-spacing: -0.02em;
}

.decision-signature {
  align-self: end;
  display: grid;
  border-top: 1px solid var(--line);
}

.decision-signature span {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.decision-signature span::before {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin: 0 12px 1px 1px;
  content: "";
  border: 1px solid currentColor;
  border-radius: 50%;
}

.concept__aside {
  align-self: end;
  max-width: 300px;
  padding-top: 22px;
  border-top: 2px solid var(--blue);
  color: #2f302b;
  font-size: clamp(18px, 1.6vw, 23px);
  line-height: 1.35;
  letter-spacing: -0.028em;
}

.handoff {
  position: relative;
  overflow: hidden;
  padding: clamp(100px, 11vw, 166px) var(--page-x) clamp(84px, 9vw, 136px);
  color: var(--white);
  background: var(--ink);
}

.handoff::after {
  position: absolute;
  right: -11vw;
  bottom: -20vw;
  width: 55vw;
  height: 55vw;
  content: "";
  border: 1px solid rgba(220, 227, 255, 0.14);
  border-radius: 50%;
  box-shadow: 0 0 0 8vw rgba(220, 227, 255, 0.025), 0 0 0 16vw rgba(220, 227, 255, 0.018);
  pointer-events: none;
}

.handoff__top {
  position: relative;
  z-index: 1;
  padding-bottom: 27px;
  color: rgba(250, 249, 245, 0.52);
  border-bottom: 1px solid rgba(250, 249, 245, 0.18);
}

.handoff__copy {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(260px, 0.75fr);
  gap: clamp(40px, 8vw, 150px);
  align-items: end;
  padding: clamp(72px, 8vw, 118px) 0 clamp(72px, 9vw, 124px);
}

.handoff h2 {
  max-width: 1020px;
  font-size: clamp(45px, 6.9vw, 108px);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.07em;
}

.handoff__copy p {
  max-width: 390px;
  padding-bottom: 8px;
  color: rgba(250, 249, 245, 0.7);
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.55;
  letter-spacing: -0.02em;
}

.handoff__steps {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(250, 249, 245, 0.25);
}

.handoff__steps li {
  position: relative;
  min-height: 130px;
  padding: 22px 30px 26px 0;
  border-right: 1px solid rgba(250, 249, 245, 0.18);
}

.handoff__steps li + li {
  padding-left: 30px;
}

.handoff__steps li:last-child {
  border-right: 0;
}

.handoff__steps li::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  content: "";
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(49, 87, 255, 0.18);
}

.handoff__steps li + li::before {
  left: 30px;
}

.handoff__steps span {
  display: block;
  color: rgba(250, 249, 245, 0.38);
  font-family: var(--mono);
  font-size: 10px;
}

.handoff__steps strong {
  display: block;
  margin-top: 36px;
  font-size: clamp(18px, 2vw, 28px);
  font-weight: 480;
  letter-spacing: -0.035em;
}

.handoff__ambition {
  position: relative;
  z-index: 1;
  margin-top: clamp(60px, 8vw, 110px);
  color: rgba(250, 249, 245, 0.5);
  font-size: clamp(20px, 2.4vw, 36px);
  letter-spacing: -0.035em;
}

.handoff__ambition strong {
  color: var(--white);
  font-weight: 500;
}

.interface {
  display: grid;
  grid-template-columns: minmax(150px, 0.68fr) minmax(420px, 1.65fr) minmax(210px, 0.7fr);
  gap: clamp(28px, 5vw, 88px);
  align-items: start;
  padding: clamp(100px, 12vw, 170px) var(--page-x);
  border-bottom: 1px solid var(--line);
  background: var(--blue-soft);
}

.interface__copy .button {
  margin-top: 38px;
}

.interface__status {
  align-self: end;
  padding-top: 22px;
  border-top: 1px solid rgba(17, 18, 15, 0.3);
}

.interface__status .signal {
  color: #575a68;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.interface__status strong {
  display: block;
  margin-top: 24px;
  font-size: 15px;
  font-weight: 520;
  line-height: 1.45;
  letter-spacing: -0.015em;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1.4fr auto auto;
  gap: 28px;
  align-items: center;
  padding: 34px var(--page-x) 38px;
  color: #484943;
  background: var(--paper);
  font-size: 11px;
}

.brand--footer {
  color: var(--ink);
  font-size: 16px;
}

.brand--footer::after {
  display: none;
}

.site-footer small {
  color: #74746d;
  font-size: 10px;
}

.motion-ready .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms cubic-bezier(0.16, 1, 0.3, 1), transform 620ms cubic-bezier(0.16, 1, 0.3, 1);
}

.motion-ready .reveal--delay-1 {
  transition-delay: 70ms;
}

.motion-ready .reveal--delay-2 {
  transition-delay: 140ms;
}

.motion-ready .reveal--delay-3 {
  transition-delay: 210ms;
}

.motion-ready .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 5px;
}

@media (max-width: 940px) {
  .concept,
  .interface {
    grid-template-columns: 140px minmax(0, 1fr);
  }

  .decision-signature,
  .concept__aside,
  .interface__status {
    grid-column: 2;
    max-width: 100%;
    margin-top: 36px;
  }

  .decision-signature {
    grid-template-columns: repeat(4, 1fr);
  }

  .decision-signature span {
    border-right: 1px solid var(--line);
  }

  .decision-signature span:last-child {
    border-right: 0;
  }

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

  .handoff__copy p {
    max-width: 600px;
  }

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

  .site-footer p {
    grid-column: 1;
    grid-row: 2;
  }

  .site-footer small {
    grid-column: 2;
    grid-row: 2;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 64px;
    --page-x: 20px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    min-height: 100svh;
    padding-top: calc(var(--header-height) + 28px);
    padding-bottom: 22px;
  }

  .hero::before {
    top: 8vh;
    right: -36vw;
    width: 108vw;
    height: 108vw;
  }

  .hero__copy {
    padding: 54px 0 42px;
  }

  .hero h1 {
    font-size: clamp(64px, 21vw, 108px);
    line-height: 0.87;
  }

  .hero__concept {
    max-width: 310px;
    font-size: 30px;
    line-height: 1.02;
  }

  .hero__body {
    max-width: 390px;
    font-size: 16px;
  }

  .hero__footer {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .hero__footer > p {
    justify-self: start;
    font-size: 13px;
  }

  .hero__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .button {
    min-width: 0;
    min-height: 46px;
    gap: 10px;
    padding: 0 14px;
    font-size: 11px;
  }

  .concept,
  .interface {
    grid-template-columns: 1fr;
    gap: 38px;
    min-height: 0;
    padding-top: 82px;
    padding-bottom: 82px;
  }

  .concept h2,
  .interface h2 {
    font-size: clamp(39px, 12vw, 55px);
    line-height: 1;
  }

  .concept__copy > p,
  .interface__copy > p {
    margin-top: 28px;
    font-size: 16px;
  }

  .decision-signature,
  .concept__aside,
  .interface__status {
    grid-column: 1;
    margin-top: 6px;
  }

  .decision-signature {
    grid-template-columns: 1fr 1fr;
  }

  .decision-signature span:nth-child(2) {
    border-right: 0;
  }

  .concept__aside {
    font-size: 19px;
  }

  .handoff {
    padding-top: 82px;
    padding-bottom: 82px;
  }

  .handoff__top span:last-child {
    display: none;
  }

  .handoff__copy {
    gap: 30px;
    padding: 58px 0 64px;
  }

  .handoff h2 {
    font-size: clamp(43px, 13vw, 62px);
    line-height: 0.96;
  }

  .handoff__copy p {
    font-size: 16px;
  }

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

  .handoff__steps li,
  .handoff__steps li + li {
    min-height: 95px;
    padding: 20px 0 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(250, 249, 245, 0.18);
  }

  .handoff__steps li::before,
  .handoff__steps li + li::before {
    top: -4px;
    left: 0;
  }

  .handoff__steps strong {
    margin-top: 20px;
    font-size: 21px;
  }

  .handoff__ambition {
    margin-top: 62px;
    font-size: 22px;
  }

  .interface__copy .button {
    width: 100%;
    margin-top: 30px;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
    gap: 18px;
    padding-top: 28px;
    padding-bottom: 30px;
  }

  .site-footer p {
    grid-column: 1 / -1;
    grid-row: auto;
    max-width: 300px;
    line-height: 1.5;
  }

  .site-footer small {
    grid-column: 1 / -1;
    grid-row: auto;
  }
}

@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;
  }

  .motion-ready .reveal {
    opacity: 1;
    transform: none;
  }
}