:root {
  color-scheme: light dark;
  --paper: #f3eddf;
  --paper-raised: #fbf7ed;
  --ink: #282118;
  --soft: #665b4c;
  --line: #cfc2aa;
  --accent: #9f3e2a;
  --accent-soft: #f0d3c6;
  --night: #17140f;
  --night-raised: #211d16;
  --night-ink: #eee5d3;
  --night-soft: #b9ad97;
  --night-line: #504635;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, #fff9 0 6rem, transparent 19rem),
    linear-gradient(135deg, var(--paper), #e9dfca);
}

a { color: var(--accent); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: .13em; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.skip-link {
  position: fixed;
  inset: .75rem auto auto .75rem;
  z-index: 2;
  padding: .65rem .9rem;
  color: var(--paper-raised);
  background: var(--accent);
  transform: translateY(-180%);
}
.skip-link:focus { transform: none; }

main {
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 7vw, 7rem) 0 3rem;
}

.hero {
  max-width: 58rem;
  padding-bottom: clamp(3rem, 8vw, 7rem);
}

.eyebrow {
  margin: 0 0 .8rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .77rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2 { text-wrap: balance; }

h1 {
  max-width: 9ch;
  margin: 0;
  font-size: clamp(4rem, 13vw, 9rem);
  font-weight: 500;
  letter-spacing: -.055em;
  line-height: .82;
}

h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 500;
  letter-spacing: -.035em;
  line-height: 1;
}

p, li { font-size: clamp(1rem, 1.5vw, 1.16rem); line-height: 1.65; }

.lead {
  max-width: 42rem;
  margin: 2rem 0 1rem;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  line-height: 1.35;
}

.boundary {
  max-width: 45rem;
  padding: 1rem 1.2rem;
  border-left: .28rem solid var(--accent);
  background: var(--accent-soft);
}

section {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--line);
}

.path {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: path;
}

.path li {
  min-height: 13rem;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: #fff5;
  counter-increment: path;
}

.path li::before {
  content: "0" counter(path);
  display: block;
  margin-bottom: 2.4rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .78rem;
}

.path strong, .path span { display: block; }
.path span { margin-top: .55rem; color: var(--soft); font-size: .98rem; line-height: 1.5; }

.run {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem 3rem;
  align-items: end;
}

.run > div p:last-child { max-width: 40rem; }

pre {
  overflow-x: auto;
  margin: 0;
  padding: 1.3rem;
  border: 1px solid var(--line);
  border-radius: .8rem;
  background: var(--night);
  color: var(--night-ink);
  font-size: .93rem;
  line-height: 1.5;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: .7rem 1.5rem;
}

.contracts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
  max-width: 58rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.contracts a {
  display: block;
  min-height: 100%;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: .75rem;
  background: #fff5;
}

.limits ul { max-width: 52rem; padding-left: 1.3rem; }
.limits li + li { margin-top: .7rem; }

footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  color: var(--soft);
}

footer p { margin: 0; font-size: .95rem; }

@media (max-width: 58rem) {
  .path { grid-template-columns: 1fr 1fr; }
  .run, footer { grid-template-columns: 1fr; }
}

@media (max-width: 36rem) {
  main { width: min(100% - 1.2rem, 72rem); }
  .path, .contracts { grid-template-columns: 1fr; }
  .path li { min-height: 0; }
  .path li::before { margin-bottom: 1.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}

@media (prefers-color-scheme: dark) {
  html { background: var(--night); }
  body {
    color: var(--night-ink);
    background:
      radial-gradient(circle at 12% 8%, #ffffff0b 0 6rem, transparent 19rem),
      linear-gradient(135deg, var(--night), #100e0a);
  }
  a, .eyebrow, .path li::before { color: #ee967b; }
  a:focus-visible { outline-color: #ee967b; }
  .boundary { background: #a8442f22; border-left-color: #ee967b; }
  section, footer, .path li, pre, .contracts a { border-color: var(--night-line); }
  .path li, .contracts a { background: #ffffff08; }
  .path span, footer { color: var(--night-soft); }
}