:root {
  --paper: #f6f4f0;
  --paper-light: #fcfbf9;
  --paper-deep: #f0ece7;
  --ink: #1a1817;
  --secondary: #5c5957;
  --tertiary: #85807a;
  --graphite: #7a7975;
  --lavender: #b8b4ad;
  --warm: #dbd1c4;
  --rule: rgba(26, 24, 23, 0.13);
  --glass: rgba(255, 255, 255, 0.5);
  --serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 74% 7%, rgba(255, 255, 255, .98), transparent 34rem),
    radial-gradient(circle at 7% 30%, rgba(219, 209, 196, .25), transparent 40rem),
    linear-gradient(135deg, var(--paper-light) 0%, var(--paper) 50%, var(--paper-deep) 100%);
  font: 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; }
a { color: inherit; }
.wrap { width: min(calc(100% - 80px), 1240px); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 20; transform: translateY(-160%); padding: 10px 14px; border-radius: 999px; color: #fff; background: var(--ink); transition: transform .18s ease; }
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 5px; }

.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 92px; border-bottom: 1px solid var(--rule); }
.wordmark { color: inherit; font: 500 26px/1 var(--serif); letter-spacing: -.02em; text-decoration: none; }
.header-mark { display: inline-flex; }
.header-mark img { display: block; width: 52px; height: 52px; }
h1, h2, h3, p { text-wrap: pretty; }

.signal-section { padding: 82px 0 64px; }
.signal-hero { min-height: 0; }
.signal-heading { display: grid; grid-template-columns: 1.3fr .7fr; gap: clamp(60px, 10vw, 140px); align-items: end; }
.hero-install { display: flex; align-items: center; justify-self: end; gap: 18px; padding-bottom: 7px; }
.hero-app-cta { display: inline-flex; align-items: center; gap: 14px; min-height: 74px; padding: 12px 17px 12px 12px; border: 1px solid rgba(255,255,255,.88); border-radius: 20px; color: inherit; background: rgba(255,255,255,.42); box-shadow: 0 14px 38px rgba(43,37,33,.055); text-decoration: none; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.hero-app-cta[aria-disabled="true"] { cursor: default; }
.hero-app-cta img { width: 48px; height: 48px; border-radius: 12px; box-shadow: 0 8px 22px rgba(43, 37, 33, .12); }
.hero-app-cta strong, .hero-app-cta small { display: block; }
.hero-app-cta strong { font-size: 13px; font-weight: 600; }
.hero-app-cta small { margin-top: 2px; color: var(--tertiary); font-size: 11px; }
.hero-app-cta:not([aria-disabled="true"]):hover strong { text-decoration: underline; text-underline-offset: 4px; }
.app-store-qr { display: none; width: 70px; height: 70px; padding: 5px; border: 1px solid var(--rule); border-radius: 10px; background: #fff; }
.signal-message h1, .meaning-intro h2, .loop-layout h2, .final-section h2 { margin: 0; font: 400 clamp(50px, 6.3vw, 86px)/.97 var(--serif); letter-spacing: -.045em; }
.signal-message h1 { max-width: 12ch; }
.signal-message > p { max-width: 39rem; margin: 28px 0 0; color: var(--secondary); font-size: 18px; }
.chart-stage { margin-top: 58px; }
.chart-wrap { min-width: 0; }
#signal-chart { display: block; width: 100%; height: 390px; }
.chart-key { display: flex; justify-content: flex-end; gap: 24px; margin-top: 20px; color: var(--tertiary); font-size: 12px; }
.chart-key span { display: inline-flex; align-items: center; gap: 8px; }
.chart-key i { display: inline-block; }
.chart-key .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--graphite); }
.chart-key .line { width: 22px; border-top: 3px solid var(--ink); }

.meaning-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(64px, 12vw, 170px); align-items: center; padding-block: 118px; border-top: 1px solid var(--rule); }
.meaning-intro > p:last-child { max-width: 31rem; margin: 30px 0 0; color: var(--secondary); font-size: 18px; }
.meaning-surface { margin: 0; padding: clamp(34px, 5vw, 62px); border: 1px solid rgba(255, 255, 255, .85); border-radius: 36px; background: var(--glass); box-shadow: 0 20px 60px rgba(45, 38, 32, .06); backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px); }
.meaning-surface p { margin: 0; font: 400 clamp(30px, 3.6vw, 48px)/1.16 var(--serif); letter-spacing: -.025em; }
.meaning-surface footer { margin-top: 44px; padding-top: 19px; border-top: 1px solid var(--rule); color: var(--tertiary); font-size: 13px; }

.loop-section { padding: 158px 0; color: var(--paper-light); background: var(--ink); }
.loop-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(70px, 14vw, 190px); align-items: start; }
.loop-steps { margin: 0; padding: 0; list-style: none; }
.loop-steps li { display: grid; grid-template-columns: 48px 1fr; gap: 24px; align-items: baseline; padding: 27px 0; border-top: 1px solid rgba(246, 244, 240, .17); }
.loop-steps li:last-child { border-bottom: 1px solid rgba(246, 244, 240, .17); }
.loop-steps span { color: rgba(246, 244, 240, .42); font-size: 12px; }
.loop-steps p { margin: 0; font: 400 clamp(30px, 3.7vw, 49px)/1.08 var(--serif); letter-spacing: -.025em; }

.final-section { display: flex; flex-direction: column; align-items: center; padding-block: 150px 135px; border-top: 1px solid var(--rule); text-align: center; }
.final-copy { margin: 30px 0 0; color: var(--secondary); font-size: 18px; }
.final-status { margin: 35px 0 0; padding-bottom: 7px; border-bottom: 1px solid var(--ink); color: inherit; font-size: 14px; font-weight: 600; text-decoration: none; }
.privacy-line { max-width: 34rem; margin: 30px 0 0; color: var(--tertiary); font-size: 12px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; min-height: 100px; border-top: 1px solid var(--rule); color: var(--tertiary); font-size: 12px; }
.site-footer .wordmark { color: var(--ink); }
.footer-links { display: flex; align-items: center; gap: 22px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

.legal-header { min-height: 92px; }
.legal-home { color: var(--tertiary); font-size: 13px; text-decoration: none; }
.legal-home:hover { color: var(--ink); }
.legal-main { padding: 90px 0 132px; }
.legal-title { max-width: 780px; }
.legal-title h1 { margin: 0; font: 400 clamp(54px, 7vw, 88px)/.98 var(--serif); letter-spacing: -.045em; }
.legal-title p { max-width: 650px; margin: 26px 0 0; color: var(--secondary); font-size: 18px; }
.legal-layout { display: grid; grid-template-columns: 190px minmax(0, 760px); gap: clamp(52px, 9vw, 130px); align-items: start; margin-top: 92px; }
.legal-meta { position: sticky; top: 32px; margin: 0; color: var(--tertiary); font-size: 12px; line-height: 1.6; }
.legal-document { min-width: 0; }
.legal-document section { padding: 0 0 44px; }
.legal-document section + section { padding-top: 44px; border-top: 1px solid var(--rule); }
.legal-document h2 { margin: 0 0 18px; font: 400 31px/1.15 var(--serif); letter-spacing: -.025em; }
.legal-document h3 { margin: 28px 0 10px; font: 600 16px/1.4 var(--sans); }
.legal-document p { margin: 0 0 17px; color: var(--secondary); }
.legal-document ul { margin: 0 0 18px; padding-left: 1.2em; color: var(--secondary); }
.legal-document li { margin-bottom: 10px; padding-left: .25em; }
.legal-document a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 4px; }
.legal-document strong { color: var(--ink); font-weight: 600; }
.legal-document section > :last-child { margin-bottom: 0; }

@media (max-width: 900px) {
  .wrap { width: min(calc(100% - 48px), 1240px); }
  .site-header { min-height: 76px; }
  .header-mark img { width: 46px; height: 46px; }
  .signal-heading, .meaning-section, .loop-layout { grid-template-columns: 1fr; }
  .signal-heading { gap: 34px; }
  .hero-install { justify-self: start; padding-bottom: 0; }
  .meaning-section { gap: 68px; }
  .loop-layout { gap: 72px; }
  .legal-main { padding-top: 72px; }
  .legal-layout { grid-template-columns: 1fr; gap: 34px; margin-top: 68px; }
  .legal-meta { position: static; }
}

@media (min-width: 901px) {
  .app-store-qr:not([hidden]) { display: block; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap { width: min(calc(100% - 36px), 1240px); }
  .signal-section { padding-block: 82px 56px; }
  .signal-message h1, .meaning-intro h2, .loop-layout h2, .final-section h2 { font-size: clamp(43px, 13vw, 59px); }
  .signal-message > p { margin-top: 24px; font-size: 16px; }
  .chart-stage { margin-top: 54px; }
  #signal-chart { height: 315px; }
  .meaning-section { padding-block: 86px; }
  .meaning-surface { border-radius: 29px; }
  .loop-section { padding-block: 106px; }
  .loop-steps li { grid-template-columns: 38px 1fr; gap: 13px; }
  .final-section { padding-block: 110px 96px; }
  .site-footer { flex-wrap: wrap; gap: 14px 24px; min-height: 108px; padding-block: 24px; }
  .site-footer .wordmark { flex-basis: 100%; }
  .legal-main { padding: 60px 0 92px; }
  .legal-title p { font-size: 16px; }
  .legal-layout { margin-top: 54px; }
  .legal-document section { padding-bottom: 36px; }
  .legal-document section + section { padding-top: 36px; }
  .legal-document h2 { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}