:root {
  --paper: var(--chalk-board);
  --ink: var(--chalk-ink);
  --muted: var(--chalk-muted);
  --line: var(--chalk-line);
  --accent: var(--chalk-accent);
  --font: var(--chalk-font);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
a:hover {
  text-decoration-thickness: 2px;
}
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
.wrap {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 48px;
}
.skip-link {
  position: absolute;
  left: 24px;
  top: -100px;
  background: var(--accent);
  color: var(--paper);
  padding: 16px;
  z-index: 3;
}
.skip-link:focus {
  top: 16px;
}
.wordmark {
  font-size: 38px;
  letter-spacing: -0.08em;
  font-weight: 800;
  text-decoration: none;
  line-height: 1;
}
.wordmark span {
  color: var(--accent);
}
.site-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
  padding-block: 28px;
}
.site-header .wordmark {
  justify-self: start;
}
.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  color: var(--muted);
}
.primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}
.primary-nav a:hover {
  color: var(--ink);
}
.nav-download {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 13px 20px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--paper);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}
.nav-download:hover {
  background: var(--ink);
}
.hero {
  padding-top: 110px;
  padding-bottom: 120px;
  text-align: center;
}
.hero-copy {
  max-width: 1000px;
  margin-inline: auto;
}
.hero h1 {
  font-size: clamp(44px, 5.6vw, 72px);
  text-wrap: balance;
  line-height: 1.04;
  letter-spacing: -0.055em;
  font-weight: 650;
  margin: 0 0 28px;
}
.subline {
  font-size: 18px;
  line-height: 1.55;
  max-width: 610px;
  margin: 0 auto 32px;
  color: var(--muted);
}
.download {
  display: flex;
  align-items: center;
  gap: 20px;
}
.hero .download {
  justify-content: center;
}
.store-badge {
  display: inline-block;
  flex-shrink: 0;
}
.store-badge img {
  width: 180px;
  height: 60px;
}
.qr {
  display: block;
  padding: 5px;
  background: #fff;
  border-radius: 5px;
}
.qr img {
  width: 70px;
  height: 70px;
}
.section-heading {
  margin-bottom: 48px;
}
h2 {
  font-size: clamp(32px, 3.6vw, 46px);
  font-weight: 550;
  letter-spacing: -0.045em;
  line-height: 1.1;
  margin: 0;
}
h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.035em;
  margin: 14px 0 12px;
}
.how {
  padding-block: 72px 90px;
  border-top: 1px solid var(--line);
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 42px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.step-copy {
  min-height: 172px;
}
.step-number {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
  padding-bottom: 6px;
}
.step-copy p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
  max-width: 290px;
}
.steps img {
  width: 100%;
  max-width: 280px;
  margin: 26px auto 0;
}
.adapts {
  padding-block: 80px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
}
.adapts h2 {
  max-width: 350px;
}
.adapts dl {
  margin: 0;
}
.adapts dl > div {
  padding: 23px 0;
  border-bottom: 1px solid var(--line);
}
.adapts dl > div:first-child {
  padding-top: 0;
}
.adapts dt {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.025em;
}
.adapts dd {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  max-width: 490px;
}
.faq {
  padding-block: 90px;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
}
.questions {
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 550;
  line-height: 1.5;
  padding: 22px 28px 22px 0;
  position: relative;
}
summary::-webkit-details-marker {
  display: none;
}
summary:after {
  content: "+";
  position: absolute;
  right: 0;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.2;
}
details[open] summary:after {
  content: "−";
}
details p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 24px;
  max-width: 535px;
}
.closing {
  text-align: center;
  padding-block: 55px 80px;
}
.closing > p {
  font-size: 42px;
  letter-spacing: -0.04em;
  margin: 0 0 24px;
  font-weight: 550;
}
footer {
  border-top: 1px solid var(--line);
  padding-block: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 35px;
  align-items: start;
}
footer .wordmark {
  font-size: 32px;
}
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 24px;
  font-size: 13px;
}
footer nav a:last-child {
  flex-basis: 100%;
}
footer .store-badge img {
  width: 120px;
  height: 40px;
}
footer .download {
  gap: 12px;
}
footer .qr img {
  width: 62px;
  height: 62px;
}
@media (max-width: 850px) {
  .wrap {
    padding-inline: 28px;
  }
  .adapts,
  .faq {
    gap: 35px;
  }
  .steps {
    gap: 24px;
  }
  .step-copy {
    min-height: 205px;
  }
  footer {
    grid-template-columns: 1fr 1fr;
  }
  footer > .download {
    grid-column: 2;
  }
}
@media (max-width: 600px) {
  .wrap {
    padding-inline: 24px;
  }
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 28px 16px;
    padding-block: 24px;
  }
  .site-header .wordmark {
    font-size: 32px;
  }
  .primary-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: center;
    gap: 32px;
    font-size: 13px;
  }
  .nav-download {
    padding: 12px 16px;
    font-size: 13px;
  }
  .hero {
    padding-top: 64px;
    padding-bottom: 80px;
  }
  .hero h1 {
    font-size: 44px;
    line-height: 1.06;
    margin-bottom: 22px;
  }
  .subline {
    font-size: 16px;
    line-height: 1.65;
    margin-bottom: 24px;
  }
  .section-heading {
    margin-bottom: 34px;
  }
  h2 {
    font-size: 34px;
  }
  .how {
    padding-block: 54px;
  }
  .steps {
    display: block;
  }
  .steps li + li {
    margin-top: 54px;
  }
  .step-copy {
    min-height: 0;
  }
  .step-copy p {
    max-width: 100%;
  }
  h3 {
    font-size: 23px;
  }
  .steps img {
    max-width: 300px;
    margin-top: 24px;
  }
  .adapts,
  .faq {
    display: block;
    padding-block: 54px;
  }
  .adapts .section-heading,
  .faq .section-heading {
    margin-bottom: 32px;
  }
  .adapts dl > div {
    padding-block: 22px;
  }
  .adapts dt {
    font-size: 20px;
  }
  .closing {
    padding-block: 26px 54px;
  }
  .closing > p {
    font-size: 34px;
    line-height: 1.12;
    max-width: 280px;
    margin-inline: auto;
  }
  footer {
    display: flex;
    flex-direction: column;
    gap: 30px;
    padding-block: 32px;
  }
  footer nav {
    gap: 20px;
  }
  footer .download {
    gap: 20px;
  }
  footer .store-badge img {
    width: 150px;
    height: 50px;
  }
  footer .qr img {
    width: 66px;
    height: 66px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}