/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 · slop: pass (58/58) · contrast: pass (40–41)
 * macrostructure: Photographic opening → Feature Stack body · H6 full-bleed hero · F2 sticky visual chapters
 * genre: consumer utility · theme: studied-DNA (source: https://opalapp.com/ + ScreenMute photography) · anchor: black pause bars
 * display: General Sans · body: SF Pro system · axes: light / geometric-grotesk / cool-neutral
 * enrichment: E8 existing project photography + tier-A product motion, no fake device chrome · nav: N10 scroll-morph · footer: Ft6 letter-close
 * audience: deliberate iPhone users · use: apply for private beta · tone: premium austere · context: user-provided
 * story: 2001→2026 tension · lost choice · before/pause/after feeling · founder · free promise · trust · beta
 * motion: sticky chapter progression + functional five-second ring + functional pause-mark settle; reduced-motion fallback
 * knob delta: emotional photo chapters + standalone product state replace the earlier typographic Feature Stack
 * honest: pass (46) · chrome: pass (47) · tokens: pass (48) · mobile: pass (34, 49–57) · icons: pass (30)
 */

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

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-block-start: calc(var(--nav-height) + var(--space-xl));
  background: var(--color-paper-2);
}

body {
  min-inline-size: 20rem;
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-inline-size: 100%;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

p,
h1,
h2,
h3,
figure,
ol,
ul {
  margin: 0;
}

h1,
h2,
h3 {
  min-inline-size: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-style: normal;
  text-wrap: balance;
}

h1,
h2 {
  font-size: var(--text-display-s);
  font-weight: 600;
  letter-spacing: -0.052em;
  line-height: 0.98;
}

h3 {
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.shell {
  inline-size: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: max(var(--page-gutter), env(safe-area-inset-left));
}

.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  border: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-modal);
  min-block-size: var(--control-height);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-control);
  background: var(--color-paper);
  color: var(--color-ink);
  white-space: nowrap;
  transform: translateY(-180%);
}

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

/* N10 · one DOM, one curve, one restrained morph. */
.premium-nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-sticky-nav);
  min-block-size: var(--nav-height);
  padding-block: 0;
  padding-inline: var(--page-gutter);
  border-block-end: var(--rule-hair) solid color-mix(in oklch, var(--color-panel-ink) 20%, transparent);
  background-color: color-mix(in oklch, var(--color-ink) 62%, transparent);
  color: var(--color-panel-ink);
  backdrop-filter: saturate(1.2) blur(14px);
  transition:
    background-color var(--dur-mid) var(--ease-out),
    border-color var(--dur-mid) var(--ease-out),
    backdrop-filter var(--dur-mid) var(--ease-out);
}

.premium-nav__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  inline-size: 100%;
  max-inline-size: var(--shell);
  min-block-size: var(--nav-height);
  margin-inline: auto;
  padding-inline: 0;
  border: var(--rule-hair) solid transparent;
  border-radius: 0;
  background-color: transparent;
  box-shadow: none;
  backdrop-filter: blur(0);
  transform: translateY(0);
  transition:
    border-color var(--dur-mid) var(--ease-out),
    border-radius var(--dur-mid) var(--ease-out),
    background-color var(--dur-mid) var(--ease-out),
    box-shadow var(--dur-mid) var(--ease-out),
    backdrop-filter var(--dur-mid) var(--ease-out),
    transform var(--dur-mid) var(--ease-out);
}

.premium-nav.is-floating {
  border-color: transparent;
  background-color: transparent;
  backdrop-filter: blur(0);
}

.premium-nav.is-floating .premium-nav__inner {
  max-inline-size: var(--nav-floating-width);
  padding-inline: var(--space-md);
  border-color: color-mix(in oklch, var(--color-panel-ink) 18%, transparent);
  border-radius: var(--radius-round);
  background-color: color-mix(in oklch, var(--color-ink) 88%, transparent);
  box-shadow: var(--shadow-nav);
  backdrop-filter: saturate(1.15) blur(18px);
  transform: translateY(var(--space-sm));
}

.premium-nav.is-on-light {
  color: var(--color-ink);
}

.premium-nav.is-on-light.is-floating .premium-nav__inner {
  border-color: color-mix(in oklch, var(--color-rule) 72%, transparent);
  background-color: color-mix(in oklch, var(--color-paper) 90%, transparent);
  box-shadow: 0 10px 34px color-mix(in oklch, var(--color-ink) 12%, transparent);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  min-block-size: var(--control-height);
  justify-self: start;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  letter-spacing: -0.022em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark__icon {
  inline-size: 1.12rem;
  block-size: 1.75rem;
  border-radius: 0;
  filter: invert(1);
}

.premium-nav.is-on-light .wordmark__icon {
  filter: none;
}

.premium-nav__links {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: 0;
  list-style: none;
}

.premium-nav__links a,
.nav-cta {
  display: inline-flex;
  align-items: center;
  min-block-size: var(--control-height);
  border-radius: var(--radius-round);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.premium-nav__links a {
  padding-inline: var(--space-xs);
  color: color-mix(in oklch, var(--color-panel-ink) 76%, var(--color-panel));
}

.nav-cta {
  justify-self: end;
  padding-inline: var(--space-md);
  background: var(--color-paper);
  color: var(--color-ink);
  transition:
    background-color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
}

.premium-nav.is-on-light .premium-nav__links a {
  color: var(--color-muted);
}

.premium-nav.is-on-light .nav-cta {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.era-story {
  position: relative;
  background: var(--color-ink);
  color: var(--color-panel-ink);
}

.era-stage {
  display: none;
}

.era-step {
  position: relative;
  min-block-size: 86svh;
  background: var(--color-ink);
  color: var(--color-panel-ink);
}

.era-step__mobile-media {
  position: relative;
  block-size: clamp(22rem, 61svh, 36rem);
  overflow: hidden;
  background: var(--color-panel-2);
}

.era-step__mobile-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, color-mix(in oklch, var(--color-ink) 72%, transparent), transparent 58%);
  pointer-events: none;
}

.era-step__mobile-media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
}

.era-step[data-era-step="connected"] .era-step__mobile-media img {
  object-position: 50% 42%;
}

.era-step[data-era-step="screen-time"] .era-step__mobile-media img {
  object-position: 54% 44%;
}

.era-step__copy {
  display: grid;
  gap: var(--space-lg);
  padding-block: var(--space-xl) var(--space-3xl);
}

.era-step__copy h1,
.era-step__copy h2 {
  max-inline-size: 14ch;
  color: var(--color-panel-ink);
}

.era-step__copy > p:last-child {
  max-inline-size: 34ch;
  color: color-mix(in oklch, var(--color-panel-ink) 76%, var(--color-panel));
  font-size: var(--text-md);
  line-height: 1.45;
}

.era-year {
  color: var(--color-panel-ink);
  font-family: var(--font-display);
  font-size: var(--text-year);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.76;
}

.scroll-cue {
  display: none;
}

.problem-statement {
  background: var(--color-paper);
  color: var(--color-ink);
}

.problem-statement__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.problem-statement h2 {
  max-inline-size: 16ch;
  font-size: clamp(2.8rem, 7.2vw, 6.2rem);
}

.problem-statement__copy {
  display: grid;
  gap: var(--space-lg);
  max-inline-size: 40rem;
  color: var(--color-neutral);
  font-size: var(--text-md);
  line-height: 1.55;
}

.problem-statement__line {
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.06;
}

/* A plain-language product definition for people, search engines, and answer engines. */
.product-answer {
  border-block: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
}

.product-answer__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl);
}

.product-answer__heading {
  display: grid;
  align-content: start;
  gap: var(--space-lg);
}

.product-answer__eyebrow {
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-answer__heading h2 {
  max-inline-size: 14ch;
}

.product-answer__copy {
  display: grid;
  gap: var(--space-xl);
}

.product-answer__summary {
  max-inline-size: 56ch;
  color: var(--color-ink-2);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.55;
}

.product-answer__facts {
  display: grid;
  padding: 0;
  border-block-start: var(--rule-hair) solid var(--color-rule);
  list-style: none;
}

.product-answer__facts li {
  display: grid;
  gap: var(--space-xs);
  padding-block: var(--space-lg);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.product-answer__facts strong {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
}

.product-answer__facts span,
.product-answer__evidence {
  color: var(--color-muted);
}

.product-answer__evidence {
  max-inline-size: 65ch;
  font-size: var(--text-sm);
}

.product-answer__evidence a {
  display: inline-flex;
  align-items: center;
  min-block-size: 44px;
}

.product-answer__links {
  display: grid;
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.product-answer__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-block-size: 3.5rem;
  border-block-end: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
}

.product-answer__links span {
  transition: transform var(--dur-short) var(--ease-out);
}

.experience-stack {
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.experience-stack__inner {
  display: grid;
  gap: var(--space-4xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.experience-stack__head {
  display: grid;
  gap: var(--space-2xl);
}

.experience-stack__head h2 {
  max-inline-size: 14ch;
  font-size: clamp(2.75rem, 6vw, 5.25rem);
}

.experience-stack__intro {
  display: grid;
  align-content: end;
  gap: var(--space-lg);
  max-inline-size: 38rem;
}

.experience-stack__intro > p {
  color: var(--color-muted);
  font-size: var(--text-md);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  min-block-size: var(--control-height);
  inline-size: fit-content;
  font-weight: 600;
  color: var(--color-accent-deep);
  text-decoration: underline;
  white-space: nowrap;
}

.text-link span {
  transition: transform var(--dur-short) var(--ease-out);
}

.experience-chapters {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.experience-chapter {
  display: grid;
  gap: var(--space-2xl);
  padding-block: var(--space-4xl);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.experience-chapter__copy {
  display: grid;
  align-content: start;
  gap: var(--space-lg);
}

.experience-phase {
  color: var(--color-neutral);
  font-size: var(--text-sm);
  font-weight: 600;
}

.experience-chapter__copy h3 {
  max-inline-size: 13ch;
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: -0.042em;
  line-height: 1.02;
}

.experience-chapter__copy > p:last-child {
  max-inline-size: 45ch;
  color: var(--color-muted);
  font-size: var(--text-md);
}

.experience-visual {
  min-inline-size: 0;
  margin: 0;
}

.experience-visual--photo {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.experience-visual--photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, color-mix(in oklch, var(--color-ink) 78%, transparent), transparent 44%);
  pointer-events: none;
}

.experience-visual--photo img {
  inline-size: 100%;
  block-size: min(77svh, 43rem);
  min-block-size: 31rem;
  object-fit: cover;
  filter: grayscale(1) contrast(1.04);
}

.experience-chapter--before .experience-visual img {
  object-position: 50% 46%;
}

.experience-chapter--after .experience-visual img {
  object-position: 50% 54%;
}

.experience-visual--photo figcaption {
  position: absolute;
  z-index: var(--z-raised);
  inset-block-end: var(--space-lg);
  inset-inline: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-lg);
  color: var(--color-panel-ink);
  font-size: var(--text-sm);
  font-weight: 600;
}

.experience-visual--product {
  display: grid;
  gap: var(--space-sm);
}

.experience-visual--product > figcaption {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.pause-field {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: var(--space-xl);
  min-block-size: min(77svh, 43rem);
  padding: var(--space-lg);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-panel-ink);
}

.pause-field__topline,
.pause-field__brand,
.pause-ladder {
  display: flex;
  align-items: center;
}

.pause-field__topline {
  justify-content: space-between;
  gap: var(--space-lg);
  padding-block-end: var(--space-lg);
  border-block-end: var(--rule-hair) solid color-mix(in oklch, var(--color-panel-ink) 18%, transparent);
  color: color-mix(in oklch, var(--color-panel-ink) 62%, var(--color-panel));
  font-size: var(--text-sm);
}

.pause-field__brand {
  gap: var(--space-sm);
  color: var(--color-panel-ink);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
}

.pause-field__brand img {
  inline-size: 0.75rem;
  block-size: 1.2rem;
  filter: invert(1);
}

.pause-field__body {
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-lg);
  text-align: center;
}

.pause-signal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  block-size: 2.5rem;
}

.pause-signal span {
  inline-size: 0.65rem;
  block-size: 2.25rem;
  border-radius: var(--radius-round);
  background: var(--color-panel-ink);
  transform: translateX(0) scaleY(1);
  transform-origin: center;
}

.pause-field.is-running .pause-signal span:first-child {
  animation: pause-signal-left 1s var(--ease-in-out) 5 alternate;
}

.pause-field.is-running .pause-signal span:last-child {
  animation: pause-signal-right 1s var(--ease-in-out) 5 alternate;
}

.pause-field.is-complete .pause-signal span {
  opacity: 0.5;
  transform: translateX(0) scaleY(0.72);
  transition:
    opacity var(--dur-mid) var(--ease-out),
    transform var(--dur-mid) var(--ease-out);
}

.pause-field__copy {
  display: grid;
  gap: var(--space-sm);
}

.pause-field__copy h3 {
  max-inline-size: 14ch;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.04;
}

.pause-field__copy p,
.demo-note {
  max-inline-size: 31ch;
  color: color-mix(in oklch, var(--color-panel-ink) 72%, var(--color-panel));
}

.pause-demo {
  display: grid;
  justify-items: center;
  gap: var(--space-md);
}

.pause-demo__dial {
  position: relative;
  display: grid;
  place-items: center;
  inline-size: 7.5rem;
  block-size: 7.5rem;
}

.pause-demo__dial svg {
  inline-size: 100%;
  block-size: 100%;
  transform: rotate(-90deg);
}

.pause-demo__dial path {
  fill: none;
  stroke-width: 2;
}

.pause-demo__track {
  stroke: color-mix(in oklch, var(--color-panel-ink) 20%, transparent);
}

.pause-demo__progress {
  stroke: var(--color-panel-ink);
  stroke-dasharray: 100;
  stroke-dashoffset: calc(100 - var(--progress));
  transition: stroke-dashoffset var(--dur-short) var(--ease-out);
}

.pause-demo__dial span {
  position: absolute;
  max-inline-size: 5.5rem;
  overflow: hidden;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pause-ladder {
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid color-mix(in oklch, var(--color-panel-ink) 18%, transparent);
  color: color-mix(in oklch, var(--color-panel-ink) 42%, var(--color-panel));
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.pause-ladder span[data-state="current"] {
  color: var(--color-panel-ink);
  font-weight: 600;
}

.experience-payoff {
  display: grid;
  gap: var(--space-xl);
  padding: var(--space-2xl) var(--space-xl);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-panel-ink);
}

.experience-payoff h3 {
  max-inline-size: 16ch;
  font-size: clamp(2rem, 5vw, 4.2rem);
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.experience-payoff p {
  max-inline-size: 45ch;
  color: color-mix(in oklch, var(--color-panel-ink) 72%, var(--color-panel));
  font-size: var(--text-md);
}

.button,
.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: var(--control-height);
  padding-inline: var(--space-lg);
  border: var(--rule-hair) solid var(--color-accent);
  border-radius: var(--radius-round);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
}

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

.button:active,
.copy-button:active,
.nav-cta:active {
  transform: translateY(1px);
}

.premium-nav__links a:active,
.text-link:active,
.foot-letter__meta a:active,
.faq-list summary:active {
  color: var(--color-muted);
}

.button:disabled,
.copy-button:disabled,
.nav-cta[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.button[data-state="loading"],
.button[aria-busy="true"] {
  cursor: wait;
}

.button[data-state="ready"] {
  border-color: var(--color-success);
}

.button[data-state="error"] {
  border-color: var(--color-error);
}

.free-foundation {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
  color: var(--color-ink);
}

.free-foundation__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.free-foundation__intro {
  display: grid;
  gap: var(--space-lg);
}

.free-foundation__intro h2 {
  max-inline-size: 15ch;
}

.free-foundation__intro > p {
  max-inline-size: 56ch;
  color: var(--color-muted);
  font-size: var(--text-md);
}

.offer-ledger {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.offer-row {
  display: grid;
  gap: var(--space-xl);
  padding-block: var(--space-2xl);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.offer-row__label {
  display: grid;
  align-content: start;
  gap: var(--space-sm);
}

.offer-row__label > p {
  color: var(--color-accent-deep);
  font-size: var(--text-sm);
  font-weight: 600;
}

.offer-row__label h3 {
  max-inline-size: 17ch;
}

.offer-row__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: 0;
  list-style: none;
}

.offer-row__facts li {
  position: relative;
  padding: var(--space-md) 0 var(--space-md) var(--space-lg);
  border-block-end: var(--rule-hair) solid var(--color-rule-2);
  color: var(--color-neutral);
}

.offer-row__facts li::before {
  content: "✓";
  position: absolute;
  inset-inline-start: 0;
  color: var(--color-accent-deep);
  font-weight: 700;
}

.offer-row__future-copy {
  display: grid;
  gap: var(--space-lg);
  max-inline-size: 44rem;
  color: var(--color-neutral);
  font-size: var(--text-md);
}

.offer-status {
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-muted);
  font-size: var(--text-base);
  font-weight: 500;
}

.founder-note {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.founder-note__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.founder-note h2 {
  max-inline-size: 14ch;
}

.founder-note__copy {
  display: grid;
  gap: var(--space-xl);
  max-inline-size: 44rem;
  color: var(--color-muted);
  font-size: var(--text-md);
}

.founder-note__promise {
  padding-block: var(--space-xl);
  border-block: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.15;
  text-wrap: balance;
}

.founder-note__signoff {
  color: var(--color-ink);
  font-weight: 600;
}

.privacy-quiet {
  border-block-end: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
  color: var(--color-ink);
}

.privacy-quiet__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.privacy-quiet h2 {
  max-inline-size: 16ch;
}

.privacy-quiet__copy {
  display: grid;
  gap: var(--space-xl);
  max-inline-size: 42rem;
  color: var(--color-muted);
  font-size: var(--text-md);
}

.privacy-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: 0;
  border-block-start: var(--rule-hair) solid var(--color-rule);
  list-style: none;
}

.privacy-facts li {
  padding-block: var(--space-md);
  border-block-end: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
}

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

.faq {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.faq__head {
  display: grid;
  gap: var(--space-md);
}

.faq__head h2 {
  max-inline-size: 10ch;
}

.faq__head p {
  color: var(--color-muted);
  font-size: var(--text-md);
}

.faq-list {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.faq-list details {
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.faq-list summary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-lg);
  min-block-size: 4.5rem;
  padding-block: var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  display: grid;
  place-items: center;
  inline-size: var(--control-height);
  block-size: var(--control-height);
  font-size: var(--text-lg);
  font-weight: 400;
  transform: rotate(0);
  transition: transform var(--dur-short) var(--ease-out);
}

.faq-list details[open] summary::after {
  transform: rotate(45deg);
}

.faq-list details p {
  max-inline-size: 48rem;
  padding-block-end: var(--space-xl);
  color: var(--color-muted);
  font-size: var(--text-md);
}

.beta-band {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.beta-band__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) var(--space-5xl);
}

.beta-copy {
  display: grid;
  align-content: start;
  gap: var(--space-lg);
}

.beta-copy h2 {
  max-inline-size: 11ch;
}

.beta-copy > p {
  max-inline-size: 36rem;
  color: var(--color-muted);
  font-size: var(--text-md);
}

.beta-copy__note {
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  font-size: var(--text-base) !important;
}

.application-form {
  display: grid;
  gap: var(--space-lg);
  align-self: start;
}

.field {
  display: grid;
  gap: var(--space-xs);
}

.field label {
  font-size: var(--text-sm);
  font-weight: 600;
}

.field input,
.field select,
.field textarea {
  inline-size: 100%;
  min-block-size: var(--control-height);
  padding: var(--space-sm) calc(var(--space-lg) + var(--space-sm)) var(--space-sm) var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-control);
  outline: 2px solid transparent;
  outline-offset: 1px;
  background: var(--color-paper-raised);
  color: var(--color-ink);
  transition: background-color var(--dur-short) var(--ease-out);
}

.field textarea {
  min-block-size: 7rem;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--color-muted);
  opacity: 1;
}

.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  border-color: var(--color-accent);
  outline-color: var(--color-focus);
}

.field input:disabled,
.field select:disabled,
.field textarea:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.field input[aria-invalid="true"],
.field select[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: var(--color-error);
  background: var(--color-error-soft);
}

.field input[data-state="success"],
.field select[data-state="success"],
.field textarea[data-state="success"] {
  border-color: var(--color-success);
  background: var(--color-success-soft);
}

.field__helper {
  min-block-size: 1lh;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.field__helper[data-state="error"] {
  color: var(--color-error);
  font-weight: 500;
}

.form-consent {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: var(--space-sm);
  min-block-size: var(--control-height);
  color: var(--color-neutral);
  cursor: pointer;
}

.form-consent input {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  margin-block-start: var(--space-2xs);
  accent-color: var(--color-accent);
}

.form-consent input[aria-invalid="true"] + span {
  color: var(--color-error);
  text-decoration: underline;
}

.form-consent input:disabled + span {
  color: var(--color-muted);
  cursor: not-allowed;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.form-actions .button,
.form-actions .copy-button {
  inline-size: 100%;
}

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

.copy-button[hidden] {
  display: none;
}

.form-status {
  min-block-size: 1.6em;
  color: var(--color-muted);
}

.form-status[data-state="error"] {
  color: var(--color-error);
}

.form-status[data-state="success"] {
  color: var(--color-success);
}

.foot-letter {
  background: var(--color-paper);
  color: var(--color-ink);
}

.foot-letter__inner {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-4xl) max(var(--space-2xl), env(safe-area-inset-bottom));
}

.foot-letter__close {
  max-inline-size: 16ch;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1;
}

.foot-letter__close span {
  display: inline-block;
  margin-block-start: var(--space-md);
  font-size: 0.45em;
  letter-spacing: -0.025em;
}

.foot-letter__meta {
  display: grid;
  gap: var(--space-lg);
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-muted);
}

.foot-letter__meta nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.foot-letter__meta a {
  display: inline-flex;
  align-items: center;
  min-block-size: var(--control-height);
  color: var(--color-ink);
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .premium-nav__links a:hover {
    color: var(--color-panel-ink);
  }

  .nav-cta:hover {
    background: var(--color-paper-2);
    transform: translateY(-1px);
  }

  .premium-nav.is-on-light .premium-nav__links a:hover {
    color: var(--color-ink);
  }

  .premium-nav.is-on-light .nav-cta:hover {
    background: var(--color-accent-deep);
  }

  .text-link:hover span {
    transform: translateX(var(--space-2xs));
  }

  .product-answer__links a:hover span {
    transform: translateX(var(--space-2xs));
  }

  .button:hover {
    background: var(--color-accent-deep);
    border-color: var(--color-accent-deep);
    transform: translateY(-1px);
  }

  .button--light:hover {
    background: var(--color-paper-2);
    border-color: var(--color-panel-ink);
  }

  .copy-button:hover {
    background: var(--color-paper-2);
    color: var(--color-ink);
  }

  .field input:hover,
  .field select:hover,
  .field textarea:hover {
    background: var(--color-paper-2);
  }
}

@media (min-width: 40rem) {
  .premium-nav__inner {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  }

  .premium-nav__links {
    display: flex;
  }

  .era-stage {
    position: sticky;
    inset-block-start: 0;
    display: block;
    block-size: 100dvh;
    overflow: hidden;
    background: var(--color-panel);
  }

  .era-stage__image {
    position: absolute;
    inset: 0;
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
    object-position: center 42%;
    filter: grayscale(1) contrast(1.06);
  }

  .era-stage__image--connected {
    opacity: 1;
    transform: none;
    transition: opacity var(--dur-long) var(--ease-out);
  }

  .era-stage__image--screen-time {
    opacity: 0;
    transform: none;
    transition: opacity calc(var(--dur-long) * 0.75) var(--ease-in);
  }

  .era-story[data-era="screen-time"].is-screen-ready .era-stage__image--connected {
    opacity: 0;
    transform: none;
    transition-timing-function: var(--ease-in);
  }

  .era-story[data-era="screen-time"].is-screen-ready .era-stage__image--screen-time {
    opacity: 1;
    transform: none;
    transition-duration: var(--dur-long);
    transition-timing-function: var(--ease-out);
  }

  @supports (animation-timeline: --era-transition) {
    .era-story {
      timeline-scope: --era-transition;
    }

    .era-step[data-era-step="screen-time"] {
      view-timeline-name: --era-transition;
      view-timeline-axis: block;
    }

    .era-story.is-screen-ready .era-stage__image--connected,
    .era-story.is-screen-ready .era-stage__image--screen-time {
      animation-duration: auto;
      animation-timing-function: var(--ease-in-out);
      animation-fill-mode: both;
      animation-timeline: --era-transition;
      animation-range: entry 0% entry 65%;
      transition: none;
    }

    .era-story.is-screen-ready .era-stage__image--connected {
      animation-name: era-connected-out;
    }

    .era-story.is-screen-ready .era-stage__image--screen-time {
      animation-name: era-screen-time-in;
    }
  }

  .era-stage__shade {
    position: absolute;
    inset: 0;
    background:
      linear-gradient(to top, color-mix(in oklch, var(--color-ink) 88%, transparent), transparent 58%),
      linear-gradient(to right, color-mix(in oklch, var(--color-ink) 36%, transparent), transparent 48%);
    pointer-events: none;
  }

  .scroll-cue {
    position: absolute;
    inset-block-end: var(--space-lg);
    inset-inline-end: var(--page-gutter);
    display: inline-flex;
    gap: var(--space-xs);
    color: color-mix(in oklch, var(--color-panel-ink) 72%, var(--color-panel));
    font-size: var(--text-sm);
  }

  .era-steps {
    position: relative;
    z-index: var(--z-raised);
    margin-block-start: -100dvh;
  }

  .era-step {
    display: flex;
    align-items: flex-end;
    min-block-size: 100dvh;
    background: transparent;
  }

  .era-step__mobile-media {
    display: none;
  }

  .era-step__copy {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: end;
    column-gap: var(--space-2xl);
    padding-block: var(--space-4xl) var(--space-3xl);
  }

  .era-step__copy h1,
  .era-step__copy h2 {
    max-inline-size: 16ch;
    font-size: clamp(3rem, 5.2vw, 4.75rem);
  }

  .era-year {
    grid-column: 1 / -1;
  }

  .era-step__copy > p:last-child {
    justify-self: end;
    padding-block-end: var(--space-xs);
  }

  .problem-statement__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    column-gap: var(--space-3xl);
  }

  .problem-statement h2 {
    grid-row: span 2;
  }

  .problem-statement__copy {
    align-self: end;
    justify-self: end;
  }

  .problem-statement__line {
    grid-column: 1 / -1;
  }

  .product-answer__inner {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    column-gap: var(--space-4xl);
  }

  .product-answer__copy {
    justify-self: end;
    inline-size: min(100%, 42rem);
  }

  .experience-stack__head {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: end;
    column-gap: var(--space-3xl);
  }

  .pause-field {
    padding: var(--space-2xl);
  }

  .experience-payoff {
    padding: var(--space-3xl);
  }

  .privacy-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .privacy-facts li:nth-child(odd) {
    border-inline-end: var(--rule-hair) solid var(--color-rule);
    padding-inline-end: var(--space-md);
  }

  .privacy-facts li:nth-child(even) {
    padding-inline-start: var(--space-md);
  }

  .offer-row__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-xl);
  }

  .faq {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    column-gap: var(--space-3xl);
  }

  .form-actions .button,
  .form-actions .copy-button {
    inline-size: auto;
  }

  .foot-letter__meta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 60rem) {
  .free-foundation__inner,
  .founder-note__inner,
  .privacy-quiet__inner,
  .beta-band__inner {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    column-gap: var(--space-4xl);
  }

  .experience-chapter {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    align-items: start;
    column-gap: var(--space-4xl);
    min-block-size: 92svh;
    padding-block: var(--space-4xl);
  }

  .experience-chapter__copy {
    position: sticky;
    inset-block-start: calc(var(--nav-height) + var(--space-4xl));
    align-self: start;
  }

  .experience-visual {
    position: sticky;
    inset-block-start: calc(var(--nav-height) + var(--space-2xl));
    align-self: start;
    inline-size: min(100%, 42rem);
    justify-self: end;
  }

  .experience-payoff {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: end;
    column-gap: var(--space-4xl);
  }

  .experience-payoff p {
    justify-self: end;
  }

  .privacy-quiet__copy,
  .founder-note__copy,
  .application-form {
    justify-self: end;
    inline-size: min(100%, 38rem);
  }

  .offer-ledger {
    align-self: start;
  }

  .offer-row {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
    column-gap: var(--space-2xl);
  }
}

@media (min-width: 90rem) {
  .era-step__copy {
    padding-block-end: var(--space-4xl);
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.00001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.00001s !important;
  }

  .era-stage__image {
    animation: none !important;
    transform: none !important;
  }

  .experience-visual,
  .pause-signal span {
    animation: none !important;
    transform: none !important;
  }
}

@keyframes pause-signal-left {
  to {
    opacity: 0.62;
    transform: translateX(var(--space-3xs)) scaleY(0.82);
  }
}

@keyframes pause-signal-right {
  to {
    opacity: 0.62;
    transform: translateX(calc(var(--space-3xs) * -1)) scaleY(0.82);
  }
}

@keyframes era-connected-out {
  0%,
  15% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

@keyframes era-screen-time-in {
  0%,
  15% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}