:root {
  color-scheme: light;
  --primary: #1677FF;
  --primary-dark: #174EA6;
  --primary-soft: #EAF2FF;
  --background: #F6F8FB;
  --surface: #FFFFFF;
  --border: #D8E0EA;
  --text-primary: #162033;
  --text-secondary: #5B667A;
}
* { box-sizing: border-box; }
html { background: var(--background); }
body {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.5rem 1rem;
  color: var(--text-primary);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}
h1, h2, h3 { line-height: 1.2; letter-spacing: -.025em; }
h1 { font-size: 2.5rem; }
h2 { margin-top: 2rem; font-size: 1.8rem; }
h3 { font-size: 1.15rem; }
a { color: var(--primary-dark); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: .15em; }
a:focus-visible { outline: 3px solid var(--primary-dark); outline-offset: 5px; border-radius: 3px; }
img { display: block; max-width: 100%; height: auto; }
.product-page { max-width: 76rem; padding: 0 1.25rem; background: var(--background); }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.4rem 0; }
.brand { display: flex; align-items: center; gap: .65rem; font-weight: 750; color: var(--text-primary); text-decoration: none; }
.brand img { border-radius: .65rem; }
.skip-link { position: absolute; top: -10rem; padding: .5rem; background: var(--surface); z-index: 1; }
.skip-link:focus { top: .5rem; }
.feature { display: grid; gap: 2rem; align-items: center; padding: 3.5rem 0; border-bottom: 1px solid var(--border); }
.hero { padding-top: 2.5rem; }
.hero h1 { margin: .6rem 0 1.4rem; font-size: clamp(2.7rem, 7vw, 4.8rem); letter-spacing: -.055em; }
.hero .lead { font-size: clamp(1.4rem, 3vw, 2rem); line-height: 1.35; color: var(--text-primary); }
.product-page p { max-width: 42rem; color: var(--text-secondary); }
.product-page .eyebrow { color: var(--primary-dark); font-size: .8rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 .75rem; }
.product-page h2 { margin: 0 0 1.25rem; font-size: clamp(2rem, 4vw, 2.8rem); }
.product-page .availability { margin-top: 1.5rem; font-size: .9rem; color: var(--primary-dark); font-weight: 650; }
.button { display: inline-flex; gap: 1.5rem; margin-top: .5rem; padding: .8rem 1.15rem; border-radius: .7rem; background: var(--primary-dark); color: var(--surface); font-weight: 650; text-decoration: none; }
.preview { display: grid; place-items: center; padding: 1.5rem; border-radius: 1.75rem; background: var(--primary-soft); }
.screenshot { width: min(100%, 15rem); border-radius: 1.5rem; box-shadow: 0 12px 24px #16203318; }
.checklist { padding-left: 1.75rem; }
.checklist li { padding: .6rem 0 .6rem .4rem; border-bottom: 1px solid var(--border); }
.checklist li::marker { color: var(--primary-dark); font-weight: 750; }
.tags { display: flex; flex-wrap: wrap; gap: .65rem; list-style: none; padding: 0; margin: 1.5rem 0 0; }
.tags li { padding: .5rem .9rem; background: var(--surface); border: 1px solid var(--border); border-radius: .6rem; }
.guide-examples { padding-left: 1.25rem; }
.guide-examples li { margin: 1rem 0; }
.text-section { padding: 3.5rem 0; border-bottom: 1px solid var(--border); }
.access-grid { display: grid; gap: 1rem; margin-top: 2rem; }
.access-card { padding: 1.5rem; border-radius: 1rem; border: 1px solid var(--border); background: var(--surface); }
.access-card h3 { font-size: 1.5rem; margin: 0; }
.access-card ul { padding-left: 1.2rem; }
.access-card li { margin: .4rem 0; }
.full-access { border-top: 4px solid var(--primary); }
.boundary p { margin-bottom: 0; }
.faq > div { padding: .75rem 0; }
.faq h3 { margin-bottom: .5rem; }
.faq p { margin-top: 0; }
.site-footer { padding: 2.5rem 0; }
.product-page .footer-brand { color: var(--text-primary); font-weight: 750; }
.site-footer ul { list-style: none; display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; padding: 0; margin: 1.5rem 0; }
.site-footer > a { font-size: .9rem; }
@media (min-width: 48rem) {
  .product-page { padding: 0 3rem; }
  .feature { grid-template-columns: 1.2fr 1fr; gap: 4rem; padding: 4.5rem 0; }
  .hero { min-height: 42rem; }
  .feature:nth-child(even) > .preview { grid-column: 1; grid-row: 1; }
  .feature:nth-child(even) > div:first-child { grid-column: 2; }
  .preview { padding: 2.5rem; }
  .access-grid { grid-template-columns: 1fr 1fr; }
}