:root {
  color-scheme: light dark;
  --paper: #f8f6f1;
  --surface: #fffefa;
  --ink: #242321;
  --muted: #6f6b66;
  --line: #dedad3;
  --coral: #ff766c;
  --coral-soft: #ffe0dc;
  --sage: #e7f1ea;
  --sage-strong: #38734d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

header, main, footer { width: min(760px, calc(100% - 40px)); margin-inline: auto; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0 18px;
}

.brand { display: flex; align-items: center; gap: 12px; font-weight: 760; font-size: 1.12rem; }
.mark { width: 34px; height: 34px; border-radius: 11px; background: var(--ink); color: var(--surface); display: grid; place-items: center; }
nav { display: flex; gap: 18px; }
a { color: var(--ink); text-underline-offset: 4px; }

main { padding: 44px 0 70px; }
.eyebrow { color: var(--sage-strong); font-size: .82rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 680px; margin: 8px 0 14px; font-size: clamp(2.2rem, 8vw, 4.8rem); line-height: .98; letter-spacing: -.045em; }
.lead { max-width: 650px; margin: 0 0 36px; color: var(--muted); font-size: 1.17rem; }

.callout, section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(22px, 5vw, 34px);
  margin: 16px 0;
}
.callout { background: var(--sage); }
h2 { margin: 0 0 8px; font-size: 1.25rem; }
p { margin: 0; }
p + p { margin-top: 12px; }
ul { margin-bottom: 0; padding-left: 20px; }
.token { background: var(--coral-soft); color: #7d211b; padding: 2px 6px; border-radius: 6px; font-weight: 700; }

footer { border-top: 1px solid var(--line); color: var(--muted); padding: 26px 0 46px; font-size: .9rem; }

@media (prefers-color-scheme: dark) {
  :root { --paper: #141513; --surface: #1d1f1c; --ink: #f5f2ec; --muted: #aaa69f; --line: #3c3d39; --sage: #1b3324; --sage-strong: #8bc49b; }
  .mark { background: var(--coral); color: #242321; }
  .token { color: #ffdcd8; background: #5b2925; }
}