:root {
  color-scheme: light dark;
  --paper: #fafaf8;
  --ink: #191918;
  --muted: #666660;
  --line: #d8d8d2;
  --accent: #2457d6;
  --accent-soft: #e9efff;
  --code: #f0f0ec;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171716;
    --ink: #f2f2ed;
    --muted: #aaa9a1;
    --line: #3b3b37;
    --accent: #8aabff;
    --accent-soft: #202d50;
    --code: #252523;
  }
}

* { box-sizing: border-box; }

html { font-size: 18px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover { text-decoration-thickness: 0.14em; }

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.site-header,
main,
.site-footer {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.4rem 1rem;
  border-bottom: 1px solid var(--line);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

.wordmark {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.82rem;
}

nav a { color: var(--muted); }

nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
}

main { padding-block: clamp(3rem, 8vw, 6rem); }

.eyebrow,
.meta,
.site-footer,
.button,
.note {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.15;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 14ch;
  margin: 0;
  font-size: clamp(2.6rem, 9vw, 5.7rem);
  font-weight: 600;
}

.document h1 {
  max-width: 18ch;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
}

h2 {
  margin: 2.8rem 0 0.7rem;
  font-size: 1.55rem;
}

h3 {
  margin: 2rem 0 0.5rem;
  font-size: 1.1rem;
}

p, ul, ol { max-width: 42rem; }

.lede {
  max-width: 35rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.22rem;
}

.promise {
  margin: clamp(3rem, 8vw, 6rem) 0;
  padding: 1.4rem 0;
  border-block: 1px solid var(--line);
  font-size: clamp(1.25rem, 4vw, 1.8rem);
}

.promise p { margin: 0.35rem 0; }

.button {
  display: inline-block;
  margin-top: 1.2rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.45rem;
  background: var(--accent);
  color: var(--paper);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.button:hover { filter: brightness(1.08); }

.meta {
  margin-top: 1.1rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.note {
  margin: 2rem 0;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-size: 0.92rem;
}

code {
  padding: 0.08em 0.28em;
  border-radius: 0.25em;
  background: var(--code);
  font-size: 0.9em;
}

li + li { margin-top: 0.45rem; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.2rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
}

.site-footer p { margin: 0; }

@media (max-width: 36rem) {
  .site-header,
  .site-footer { align-items: flex-start; flex-direction: column; }
  main { padding-block: 3.2rem; }
}

@media print {
  .site-header nav { display: none; }
  body { background: white; color: black; }
  main { padding-block: 2rem; }
}