:root {
  --ink: #17181d;
  --ink-soft: #555860;
  --paper: #f3f4f0;
  --paper-deep: #e7e8e3;
  --coral: #ff684d;
  --blue: #6c9ad3;
  --yellow: #e6c74b;
  --line: rgba(23, 24, 29, 0.18);
  --line-dark: rgba(243, 244, 240, 0.2);
  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "DM Mono", "SFMono-Regular", Consolas, monospace;
  --shell: min(1280px, calc(100vw - 96px));
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

button {
  font: inherit;
}

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

.site-header {
  position: absolute;
  z-index: 20;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: var(--shell);
  height: 92px;
  margin-inline: auto;
  color: var(--paper);
}

.page-progress {
  position: fixed;
  z-index: 30;
  inset: 0 0 auto;
  height: 2px;
  pointer-events: none;
}

.page-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 600 20px/1 var(--display);
  letter-spacing: -0.04em;
}

.wordmark-mark,
.mini-mark {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  width: 20px;
  height: 20px;
}

.wordmark-mark span,
.mini-mark span {
  display: block;
  width: 5px;
  border-radius: 2px 2px 0 0;
  background: var(--coral);
}

.wordmark-mark span:nth-child(1),
.mini-mark span:nth-child(1) { height: 8px; opacity: 0.66; }
.wordmark-mark span:nth-child(2),
.mini-mark span:nth-child(2) { height: 14px; }
.wordmark-mark span:nth-child(3),
.mini-mark span:nth-child(3) { height: 20px; opacity: 0.8; }

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-left: 100px;
  font-size: 12px;
  letter-spacing: 0.01em;
}

.desktop-nav a,
.header-signin {
  opacity: 0.82;
  transition: opacity 180ms ease;
}

.desktop-nav a:hover,
.header-signin:hover {
  opacity: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 22px;
}

.language-control {
  display: inline-flex;
  align-items: center;
}

.language-select {
  min-width: 48px;
  padding: 8px 2px;
  color: var(--paper);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(243, 244, 240, 0.45);
  border-radius: 0;
  font: 500 10px/1 var(--mono);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.language-select:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

.language-select option {
  color: var(--ink);
  background: var(--paper);
}

.header-signin {
  font-size: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 0;
  font: 500 13px/1 var(--body);
  transition: transform 200ms ease, background 200ms ease, color 200ms ease;
}

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

.button svg,
.text-link svg,
.proof-arrow,
.proof-reveal svg,
.conversation-footer svg {
  width: 16px;
  height: 16px;
  stroke-width: 1.7;
  transition: transform 200ms ease;
}

.button:hover svg,
.text-link:hover svg,
.proof-item:hover .proof-arrow,
.proof-item[aria-expanded="true"] .proof-arrow {
  transform: translate(3px, -3px);
}

.button-small {
  min-height: 42px;
  padding-inline: 17px;
  font-size: 12px;
}

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

.button-light:hover {
  background: #fff;
}

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

.button-coral:hover {
  background: #ff7b62;
}

.menu-toggle,
.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  display: flex;
  align-items: stretch;
  min-height: 100svh;
  overflow: hidden;
  color: var(--paper);
  background: var(--ink);
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  background: url("assets/study-hero.jpg") center 58% / cover no-repeat;
  transform: translate3d(0, var(--hero-shift, 0px), 0) scale(var(--hero-scale, 1.04));
  will-change: transform;
  animation: hero-image-in 1.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.hero-shade {
  background: rgba(15, 18, 20, 0.57);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 680px) 1fr;
  align-items: center;
  min-height: 100svh;
  padding-top: 70px;
}

.hero-copy {
  max-width: 650px;
  padding-bottom: 30px;
}

.eyebrow,
.mono-label,
.section-kicker,
.session-status,
.session-topbar,
.session-bottom,
.hero-note,
.scroll-cue,
.human-foot,
.final-meta,
.footer-note {
  font: 500 10px/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-eyebrow {
  display: flex;
  justify-content: space-between;
  width: min(100%, 510px);
  margin: 0 0 38px;
  color: rgba(243, 244, 240, 0.72);
  animation: reveal-up 800ms 180ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.06em;
}

h1 {
  max-width: 660px;
  margin-bottom: 27px;
  font-size: clamp(56px, 7.2vw, 108px);
  line-height: 0.95;
  animation: reveal-up 800ms 260ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 0.98;
}

h2 em,
h1 em {
  color: var(--coral);
  font-style: normal;
}

.hero-lede {
  max-width: 500px;
  margin-bottom: 35px;
  color: rgba(243, 244, 240, 0.82);
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.5;
  animation: reveal-up 800ms 350ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  animation: reveal-up 800ms 440ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding-bottom: 5px;
  border-bottom: 1px solid currentColor;
  font-size: 13px;
  transition: color 180ms ease;
}

.text-link:hover {
  color: var(--coral);
}

.text-link-light {
  color: var(--paper);
}

.hero-aside {
  align-self: end;
  justify-self: end;
  max-width: 180px;
  padding-bottom: 100px;
  animation: reveal-up 800ms 520ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.hero-note {
  margin: 0;
  color: rgba(243, 244, 240, 0.67);
  line-height: 1.7;
}

.hero-foot {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 34px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(243, 244, 240, 0.68);
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-transform: none;
  letter-spacing: 0;
}

.scroll-line {
  display: inline-block;
  width: 42px;
  height: 1px;
  background: var(--coral);
}

.section-light,
.section-coral,
.section-dark {
  position: relative;
}

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

.section-dark {
  color: var(--paper);
  background: var(--ink);
}

.section-coral {
  color: var(--ink);
  background: var(--coral);
}

.section-coral h2 em {
  color: var(--ink);
}

.proof {
  min-height: 920px;
  padding-block: 150px 170px;
}

.section-kicker {
  display: flex;
  gap: 24px;
  color: var(--ink-soft);
}

.section-kicker-dark {
  color: rgba(243, 244, 240, 0.56);
}

.section-kicker-coral {
  color: rgba(23, 24, 29, 0.64);
}

.proof-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
  align-items: end;
  gap: 70px;
  margin-top: 102px;
  padding-bottom: 100px;
  border-bottom: 1px solid var(--line);
}

.proof-intro h2 {
  margin-bottom: 0;
}

.proof-intro p {
  max-width: 250px;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 15px;
}

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

.proof-item {
  position: relative;
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) minmax(210px, 280px) 26px;
  align-items: center;
  gap: 20px;
  width: 100%;
  min-height: 136px;
  padding: 24px 0;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.proof-item:last-child {
  border-bottom: 0;
}

.proof-index,
.step-marker,
.conversation-label {
  font: 500 10px/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.proof-index {
  align-self: start;
  padding-top: 5px;
  color: var(--ink-soft);
}

.proof-copy {
  display: grid;
  gap: 10px;
}

.proof-copy strong {
  font: 500 clamp(20px, 2.2vw, 28px)/1.15 var(--display);
  letter-spacing: -0.04em;
}

.proof-copy > span {
  max-width: 430px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.proof-reveal {
  display: grid;
  gap: 7px;
  justify-items: start;
  color: var(--ink-soft);
  font-size: 12px;
  opacity: 0;
  transform: translateX(14px);
  transition: opacity 240ms ease, transform 240ms ease;
}

.proof-reveal .mono-label {
  color: var(--coral);
  font-size: 9px;
}

.proof-reveal svg {
  width: 14px;
  height: 14px;
  color: var(--coral);
}

.proof-item:hover .proof-reveal,
.proof-item:focus-visible .proof-reveal,
.proof-item[aria-expanded="true"] .proof-reveal {
  opacity: 1;
  transform: translateX(0);
}

.proof-item:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 6px;
}

.proof-arrow {
  justify-self: end;
  color: var(--coral);
}

.workflow {
  min-height: 1700px;
  padding-block: 150px;
  overflow: clip;
}

.workflow-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 300px);
  grid-template-areas: "kicker copy" "title copy";
  gap: 0 70px;
  align-items: end;
}

.workflow-intro .section-kicker { grid-area: kicker; }
.workflow-intro h2 { grid-area: title; margin: 92px 0 0; }
.workflow-intro p { grid-area: copy; align-self: end; margin: 0 0 10px; color: rgba(243, 244, 240, 0.65); font-size: 15px; }

.workflow-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: 90px;
  align-items: start;
  margin-top: 140px;
}

.workflow-steps {
  display: grid;
  gap: 0;
}

.workflow-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 24px;
  min-height: 270px;
  padding: 2px 0 62px;
  border-top: 1px solid var(--line-dark);
  color: rgba(243, 244, 240, 0.48);
  transition: color 250ms ease;
}

.workflow-step.is-active,
.workflow-step:hover {
  color: var(--paper);
}

.workflow-step h3 {
  margin: -5px 0 14px;
  font-size: 30px;
  line-height: 1;
}

.workflow-step p {
  max-width: 270px;
  margin: 0;
  color: inherit;
  font-size: 13px;
  line-height: 1.7;
}

.step-marker {
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: inherit;
}

.step-dot {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  transition: background 250ms ease, transform 250ms ease;
}

.workflow-step.is-active .step-dot {
  background: var(--coral);
  transform: scale(1.4);
}

.workflow-visual-wrap {
  min-height: 1240px;
}

.workflow-visual {
  position: sticky;
  top: 13vh;
}

.session-window {
  min-height: 540px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.15);
}

.session-topbar,
.session-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 0 22px;
  color: rgba(23, 24, 29, 0.56);
  background: var(--paper-deep);
}

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

.mini-mark {
  width: 13px;
  height: 13px;
  gap: 1px;
}

.mini-mark span { width: 3px; }
.mini-mark span:nth-child(1) { height: 5px; }
.mini-mark span:nth-child(2) { height: 9px; }
.mini-mark span:nth-child(3) { height: 13px; }

.session-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #54a276;
  animation: status-pulse 2.4s ease-in-out infinite;
}

.session-content {
  position: relative;
  min-height: 447px;
  padding: 54px clamp(25px, 5vw, 70px);
  overflow: hidden;
}

.session-view {
  position: absolute;
  inset: 54px clamp(25px, 5vw, 70px);
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 350ms ease, transform 350ms ease;
}

.session-view.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.session-view-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 42px;
  color: rgba(23, 24, 29, 0.5);
  font: 500 10px/1.3 var(--mono);
  text-transform: uppercase;
}

.session-view-head .mono-label {
  color: var(--ink);
}

.file-stack {
  border-top: 1px solid var(--line);
}

.file-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.file-row > span:last-child {
  color: rgba(23, 24, 29, 0.48);
  font: 10px/1 var(--mono);
}

.file-type {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 22px;
  color: var(--paper);
  font: 500 9px/1 var(--mono);
}

.file-type-red { background: var(--coral); }
.file-type-blue { background: var(--blue); }
.file-type-yellow { color: var(--ink); background: var(--yellow); }

.session-tip,
.review-note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: auto;
  padding-top: 42px;
  color: var(--coral);
  font-size: 12px;
}

.session-tip svg,
.review-note svg {
  width: 14px;
  height: 14px;
}

.question-bubble,
.answer-block {
  max-width: 440px;
  padding: 17px 20px;
  font-size: 16px;
  line-height: 1.45;
}

.question-bubble {
  align-self: flex-end;
  color: var(--paper);
  background: var(--ink);
}

.answer-block {
  margin-top: 20px;
  border-left: 2px solid var(--coral);
  background: var(--paper-deep);
}

.answer-label,
.source-line {
  display: flex;
  align-items: center;
  gap: 6px;
  font: 500 9px/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.answer-label { color: var(--coral); }

.answer-block p {
  margin: 11px 0 15px;
  font-size: 14px;
}

.source-line {
  color: rgba(23, 24, 29, 0.52);
  font-size: 9px;
  letter-spacing: 0;
  text-transform: none;
}

.source-line svg {
  width: 13px;
  height: 13px;
}

.practice-prompt {
  max-width: 420px;
  margin: 0 0 42px;
  font: 500 clamp(24px, 2.7vw, 36px)/1.1 var(--display);
  letter-spacing: -0.05em;
}

.practice-input {
  display: flex;
  align-items: center;
  min-height: 58px;
  padding: 0 17px;
  color: rgba(23, 24, 29, 0.4);
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
}

.input-cursor {
  width: 1px;
  height: 17px;
  margin-left: 3px;
  background: var(--coral);
  animation: cursor-blink 1s step-end infinite;
}

.practice-foot {
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  color: rgba(23, 24, 29, 0.48);
  font: 10px/1 var(--mono);
}

.review-grid {
  display: grid;
  grid-template-columns: 0.65fr 1fr;
  gap: 42px;
  align-items: center;
  padding-bottom: 38px;
  border-bottom: 1px solid var(--line);
}

.review-score {
  display: grid;
  gap: 6px;
}

.review-score span {
  font: 500 clamp(68px, 8vw, 110px)/0.85 var(--display);
  letter-spacing: -0.08em;
}

.review-score small {
  color: var(--ink-soft);
  font: 10px/1 var(--mono);
  text-transform: uppercase;
}

.review-list {
  display: grid;
  gap: 16px;
  color: rgba(23, 24, 29, 0.72);
  font-size: 12px;
}

.review-list span {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.review-list svg {
  width: 13px;
  height: 13px;
}

.review-done { color: var(--coral); }

.session-bottom {
  min-height: 42px;
  font-size: 9px;
  letter-spacing: 0.03em;
  text-transform: none;
}

.session-progress {
  display: inline-flex;
  width: 44%;
  height: 2px;
  background: rgba(23, 24, 29, 0.14);
}

.session-progress span {
  width: 38%;
  background: var(--coral);
}

.visual-caption {
  display: block;
  max-width: 310px;
  margin: 21px 0 0 auto;
  color: rgba(243, 244, 240, 0.48);
  font-size: 12px;
  line-height: 1.6;
}

.stuck {
  min-height: 900px;
  padding-block: 150px 180px;
}

.stuck-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 110px;
  align-items: center;
  margin-top: 120px;
}

.stuck-copy h2 {
  font-size: clamp(45px, 5.2vw, 76px);
}

.stuck-copy p {
  max-width: 340px;
  margin: 0 0 32px;
  color: var(--ink-soft);
  font-size: 15px;
}

.conversation {
  min-height: 462px;
  padding: 25px 28px 23px;
  background: #e6e7e2;
  border: 1px solid rgba(23, 24, 29, 0.14);
}

.conversation-head,
.conversation-footer {
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(23, 24, 29, 0.56);
  font: 500 10px/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.conversation-time {
  margin-left: auto;
  color: rgba(23, 24, 29, 0.4);
}

.conversation-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  max-width: 470px;
  padding: 41px 0 35px;
  border-bottom: 1px solid var(--line);
}

.conversation-row p {
  margin: -4px 0 0;
  font: 500 20px/1.25 var(--display);
  letter-spacing: -0.04em;
}

.conversation-ai p {
  font-size: 18px;
}

.conversation-label {
  color: var(--coral);
}

.conversation-user .conversation-label {
  color: rgba(23, 24, 29, 0.48);
}

.conversation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.conversation-actions button {
  min-height: 33px;
  padding: 0 12px;
  color: var(--ink);
  background: transparent;
  border: 1px solid rgba(23, 24, 29, 0.35);
  border-radius: 0;
  font-size: 11px;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease;
}

.conversation-actions button:hover,
.conversation-actions button:focus-visible {
  background: var(--paper);
  border-color: var(--ink);
  outline: none;
}

.conversation-footer {
  justify-content: space-between;
  margin-top: 21px;
  font-size: 9px;
  letter-spacing: 0;
  text-transform: none;
}

.conversation-footer svg {
  color: var(--coral);
}

.human {
  min-height: 830px;
  padding-block: 145px 36px;
}

.human-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 320px);
  gap: 80px;
  align-items: end;
  margin-top: 170px;
}

.human-layout h2 {
  margin: 0;
  font-size: clamp(70px, 11vw, 160px);
  line-height: 0.84;
}

.human-copy {
  padding-bottom: 8px;
}

.human-copy > p:first-child {
  max-width: 290px;
  margin-bottom: 63px;
  font-size: 17px;
  line-height: 1.55;
}

.human-callout {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid rgba(23, 24, 29, 0.42);
  font: 500 15px/1.35 var(--display);
  letter-spacing: -0.02em;
}

.human-callout strong {
  font-weight: 600;
}

.human-foot {
  display: flex;
  justify-content: space-between;
  margin-top: 170px;
  padding-top: 18px;
  border-top: 1px solid rgba(23, 24, 29, 0.42);
  color: rgba(23, 24, 29, 0.65);
}

.final-cta {
  min-height: 770px;
  padding-block: 135px;
}

.final-cta-shell {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.final-cta h2 {
  margin: 110px 0 30px;
  font-size: clamp(56px, 9.3vw, 130px);
  line-height: 0.9;
}

.final-cta-copy {
  max-width: 330px;
  margin-bottom: 34px;
  color: rgba(243, 244, 240, 0.66);
  font-size: 15px;
}

.final-meta {
  display: flex;
  gap: 31px;
  margin-top: auto;
  padding-top: 130px;
  color: rgba(243, 244, 240, 0.48);
}

.site-footer {
  color: var(--paper);
  background: var(--ink);
  border-top: 1px solid var(--line-dark);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  min-height: 115px;
}

.wordmark-dark {
  color: var(--paper);
}

.footer-note:nth-child(2) {
  justify-self: center;
  color: rgba(243, 244, 240, 0.5);
  text-transform: none;
  letter-spacing: 0;
}

.footer-note:last-child {
  justify-self: end;
  color: rgba(243, 244, 240, 0.5);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

@keyframes hero-image-in {
  from { transform: scale(1.13); }
  to { transform: scale(1.04); }
}

@keyframes reveal-up {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes cursor-blink {
  0%, 46% { opacity: 1; }
  47%, 100% { opacity: 0; }
}

@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(84, 162, 118, 0.2); }
  50% { box-shadow: 0 0 0 4px rgba(84, 162, 118, 0); }
}

@media (max-width: 900px) {
  :root { --shell: min(100% - 48px, 720px); }
  .site-header { height: 76px; }
  .desktop-nav,
  .header-signin { display: none; }
  .header-actions { gap: 12px; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; padding: 0; color: var(--paper); background: transparent; border: 1px solid rgba(243, 244, 240, 0.36); }
  .menu-toggle svg { width: 18px; height: 18px; }
  .mobile-nav { position: fixed; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: 22px; padding: 80px 24px 24px; color: var(--paper); background: var(--ink); opacity: 0; pointer-events: none; transform: translateY(-8px); transition: opacity 220ms ease, transform 220ms ease; }
  .mobile-nav a { width: fit-content; padding-bottom: 6px; border-bottom: 1px solid rgba(243, 244, 240, 0.32); font: 500 30px/1.1 var(--display); letter-spacing: -0.05em; }
  .site-header.nav-open .mobile-nav { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .site-header.nav-open .menu-toggle { position: relative; z-index: 2; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-aside { display: none; }
  .hero-foot { bottom: 24px; }
  .proof,
  .workflow,
  .stuck,
  .human,
  .final-cta { padding-block: 100px 110px; }
  .proof { min-height: 0; }
  .proof-intro { grid-template-columns: minmax(0, 1fr) 220px; gap: 35px; margin-top: 70px; padding-bottom: 70px; }
  .proof-item { grid-template-columns: 45px minmax(0, 1fr) 24px; }
  .proof-reveal { display: none; }
  .workflow { min-height: 0; }
  .workflow-intro { grid-template-columns: minmax(0, 1fr) 200px; gap: 0 40px; }
  .workflow-layout { grid-template-columns: minmax(170px, 0.7fr) minmax(0, 1.3fr); gap: 40px; margin-top: 90px; }
  .workflow-visual-wrap { min-height: 1060px; }
  .session-window { min-height: 470px; }
  .session-content { min-height: 377px; }
  .stuck-layout { grid-template-columns: minmax(0, 0.82fr) minmax(300px, 1.18fr); gap: 45px; margin-top: 80px; }
  .human-layout { margin-top: 100px; }
  .human-layout h2 { font-size: clamp(66px, 13vw, 120px); }
  .human-foot { margin-top: 100px; }
  .final-cta h2 { margin-top: 85px; }
}

@media (max-width: 620px) {
  :root { --shell: calc(100% - 36px); }
  .site-header { height: 70px; }
  .wordmark { font-size: 18px; }
  .header-actions .button { display: none; }
  .hero-grid { padding-top: 70px; }
  .hero-image { background-position: 59% center; }
  .hero-shade { background: rgba(15, 18, 20, 0.67); }
  .hero-eyebrow { margin-bottom: 28px; }
  h1 { max-width: 100%; font-size: clamp(44px, 12.5vw, 62px); }
  .hero-lede { max-width: 330px; font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-foot { font-size: 9px; }
  .hero-foot .eyebrow { display: none; }
  .proof,
  .workflow,
  .stuck,
  .human,
  .final-cta { padding-block: 82px 90px; }
  .proof-intro { display: block; margin-top: 58px; padding-bottom: 54px; }
  .proof-intro h2 { margin-bottom: 28px; font-size: clamp(47px, 14vw, 68px); }
  .proof-intro p { margin-bottom: 0; }
  .proof-item { grid-template-columns: 35px minmax(0, 1fr) 18px; min-height: 145px; gap: 10px; }
  .proof-copy strong { font-size: 21px; }
  .proof-copy > span { max-width: 280px; font-size: 12px; }
  .workflow-intro { display: block; }
  .workflow-intro h2 { margin-top: 58px; font-size: clamp(47px, 14vw, 68px); }
  .workflow-intro p { max-width: 250px; margin-top: 28px; }
  .workflow-layout { display: block; margin-top: 70px; }
  .workflow-steps { margin-bottom: 30px; }
  .workflow-step { min-height: auto; padding: 2px 0 30px; }
  .workflow-step:not(.is-active) { color: rgba(243, 244, 240, 0.42); }
  .workflow-step h3 { font-size: 26px; }
  .workflow-step p { max-width: 300px; }
  .workflow-visual-wrap { min-height: auto; }
  .workflow-visual { position: relative; top: auto; }
  .session-window { min-height: 495px; }
  .session-content { min-height: 402px; }
  .session-view { inset: 42px 22px; }
  .session-view-head { margin-bottom: 28px; }
  .file-row { grid-template-columns: 40px minmax(0, 1fr); gap: 10px; font-size: 11px; }
  .file-row > span:last-child { display: none; }
  .question-bubble,
  .answer-block { font-size: 14px; }
  .practice-prompt { font-size: 28px; }
  .review-grid { gap: 22px; }
  .review-score span { font-size: 74px; }
  .visual-caption { margin-left: 0; }
  .stuck-layout { display: block; margin-top: 68px; }
  .stuck-copy h2 { font-size: clamp(47px, 14vw, 68px); }
  .stuck-copy p { max-width: 300px; }
  .conversation { min-height: 430px; margin-top: 60px; padding: 20px 17px; }
  .conversation-row { grid-template-columns: 1fr; gap: 13px; padding-block: 31px 28px; }
  .conversation-row p { margin: 0; font-size: 19px; }
  .conversation-ai p { font-size: 17px; }
  .human { min-height: 700px; }
  .human-layout { display: block; margin-top: 90px; }
  .human-layout h2 { margin-bottom: 70px; font-size: clamp(70px, 21vw, 120px); }
  .human-copy > p:first-child { max-width: 275px; margin-bottom: 52px; }
  .human-foot { flex-direction: column; gap: 14px; margin-top: 90px; }
  .final-cta { min-height: 690px; }
  .final-cta h2 { margin-top: 80px; font-size: clamp(56px, 17vw, 91px); }
  .final-meta { flex-wrap: wrap; gap: 14px 24px; padding-top: 90px; }
  .footer-inner { grid-template-columns: 1fr; gap: 17px; align-items: start; padding-block: 30px; }
  .footer-note:nth-child(2),
  .footer-note:last-child { justify-self: start; }
}

@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; }
  .hero-image { transform: none !important; }
}