:root {
  color-scheme: light;
  --page: #bdbdbd;
  --paper: #f1f2ec;
  --ink: #111111;
  --blue: #0d47a1;
  --cyan: #29b6f6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: linear-gradient(135deg, #d7d7d7, var(--page) 60%, #a9c8d7); font-family: Arial, Helvetica, sans-serif; line-height: 1.65; }
a { color: var(--blue); text-underline-offset: 4px; text-decoration-thickness: 1.5px; }
a:hover { text-decoration-thickness: 3px; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; border-radius: 2px; }
.page-width, .header-inner { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 2; padding: 10px 16px; color: #000; background: var(--paper); }
.skip-link:focus { top: 12px; }
.site-header { background: #000; }
.header-inner { min-height: 104px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: block; width: 224px; max-width: 52%; }
.brand img { display: block; width: 100%; height: auto; }
.header-link { color: var(--cyan); font-size: 15px; text-decoration: none; border-bottom: 1px solid var(--cyan); }
.site-header a:focus-visible { outline-color: var(--cyan); }
.hero { display: grid; grid-template-columns: 1.35fr 1fr; gap: 64px; align-items: start; padding-block: 70px 76px; }
.identity, .section-label, .small-label { margin: 0 0 20px; color: var(--blue); font-size: 14px; font-weight: 700; }
h1, h2, p { margin-top: 0; }
h1 { max-width: 15ch; margin-bottom: 26px; font-size: clamp(40px, 4.5vw, 62px); line-height: 1.07; letter-spacing: -0.035em; text-wrap: balance; }
.lede { max-width: 52ch; margin-bottom: 28px; font-size: 18px; line-height: 1.65; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 24px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 11px 19px; border: 2px solid var(--blue); border-radius: 6px; font-weight: 700; line-height: 1.4; text-align: center; text-decoration: none; }
.primary { color: var(--cyan); background: #000; }
.button:hover { border-color: #000; color: #fff; }
.text-link { display: inline-block; padding-block: 8px; font-size: 15px; font-weight: 700; }
.example { padding: 30px 32px 24px; color: var(--paper); background: #000; border: 2px solid var(--blue); border-radius: 18px; }
.example .small-label { margin-bottom: 14px; color: var(--cyan); }
.example h2 { margin-bottom: 18px; font-size: 28px; line-height: 1.2; font-weight: 700; }
.example > p { font-size: 16px; }
.example-record { margin: 24px 0 18px; }
.example-record > div { display: grid; grid-template-columns: 100px 1fr; gap: 16px; padding-block: 13px; border-top: 1px solid #424242; font-size: 14px; line-height: 1.5; }
dt { font-weight: 700; }
dd { margin: 0; }
.example-record dt { color: var(--cyan); }
.example .example-note { margin-bottom: 0; color: #c7c7c7; font-size: 13px; }
.reading-surface { background: var(--paper); border-block: 1px solid #9e9e9e; }
.reading-section { padding-block: 44px; border-bottom: 1px solid #cccfc5; }
.reading-section:last-child { border: 0; padding-bottom: 56px; }
.reading-section.intro { padding-top: 54px; }
.section-label { margin-bottom: 10px; }
h2 { margin-bottom: 20px; font-size: clamp(26px, 3vw, 34px); line-height: 1.2; letter-spacing: -0.02em; text-wrap: balance; }
.prose { max-width: 78ch; font-size: 17px; }
.prose p:last-child { margin-bottom: 0; }
.founder-note { max-width: 78ch; margin: 30px 0 0; padding: 2px 0 2px 22px; border-left: 3px solid var(--blue); }
.founder-note blockquote { margin: 0 0 10px; font-size: 18px; line-height: 1.65; }
.founder-note blockquote p { margin: 0; }
.founder-note figcaption { color: #4f4f4f; font-size: 14px; }
.use-cases { display: grid; grid-template-columns: 1fr 1fr; column-gap: 56px; row-gap: 24px; margin: 28px 0 20px; }
.use-cases dt { margin-bottom: 4px; font-size: 17px; }
.use-cases dd { max-width: 46ch; font-size: 16px; }
.quiet-note { max-width: 80ch; margin-bottom: 0; color: #4f4f4f; font-size: 14px; }
.structure-summary { display: flex; flex-wrap: wrap; gap: 6px 12px; margin-block: 24px 26px; color: var(--blue); font-size: clamp(18px, 2.2vw, 25px); font-weight: 700; line-height: 1.4; }
.structure-summary span { font-weight: 400; }
.definitions { margin-block: 0 20px; }
.definitions > div { display: grid; grid-template-columns: 150px 1fr; gap: 24px; max-width: 80ch; padding-block: 13px; border-top: 1px solid #cccfc5; }
.experience { display: grid; grid-template-columns: 1.6fr 1fr; gap: 64px; align-items: center; padding-block: 64px; }
.experience h2 { max-width: 24ch; }
.experience p { max-width: 65ch; }
.experience p:last-child { margin-bottom: 0; }
.experience-links { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.site-footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px 32px; padding-block: 22px 36px; border-top: 1px solid #8b8b8b; font-size: 13px; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 10px 24px; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-block: 44px 48px; }
  h1 { max-width: 19ch; font-size: clamp(40px, 7vw, 58px); }
  .hero-copy { max-width: 720px; }
  .example { max-width: 620px; }
  .experience { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 560px) {
  .page-width, .header-inner { width: calc(100% - 36px); }
  .header-inner { min-height: 86px; gap: 18px; }
  .brand { width: 180px; }
  .header-link { max-width: 96px; font-size: 13px; line-height: 1.45; }
  .hero { padding-block: 34px 40px; }
  .identity { max-width: 27ch; font-size: 13px; margin-bottom: 18px; }
  h1 { font-size: clamp(38px, 9.5vw, 52px); }
  .lede { font-size: 17px; }
  .actions { align-items: flex-start; flex-direction: column; gap: 8px; }
  .example { padding: 24px 22px; }
  .example h2 { font-size: 26px; }
  .example-record > div { grid-template-columns: 1fr; gap: 4px; }
  .reading-section, .reading-section.intro { padding-block: 34px; }
  .use-cases { grid-template-columns: 1fr; gap: 22px; }
  .prose { font-size: 16px; }
  .definitions > div { grid-template-columns: 1fr; gap: 4px; }
  .experience { padding-block: 40px; }
  .site-footer { padding-bottom: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}