:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --ink: #16191d;
  --muted: #5d636b;
  --line: #e2e0d8;
  --accent: #0f8a62;
  --accent-soft: #e2f4ec;
  --code-bg: #f0eee7;
  --warn: #9a5b00;
  --warn-soft: #fbefdc;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111418;
    --surface: #171b20;
    --ink: #e8eaec;
    --muted: #9aa2ab;
    --line: #262c33;
    --accent: #45d0a0;
    --accent-soft: #143428;
    --code-bg: #1c2127;
    --warn: #f0b45a;
    --warn-soft: #34270f;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111418;
  --surface: #171b20;
  --ink: #e8eaec;
  --muted: #9aa2ab;
  --line: #262c33;
  --accent: #45d0a0;
  --accent-soft: #143428;
  --code-bg: #1c2127;
  --warn: #f0b45a;
  --warn-soft: #34270f;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 "Instrument Sans", system-ui, sans-serif;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
}

section { padding: 40px 0; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: 0; }

.hero { padding: 72px 0 48px; }
.eyebrow { color: var(--accent); font: 500 13px/1 "JetBrains Mono", monospace; letter-spacing: 0.02em; margin: 0 0 16px; }
h1 { font-size: clamp(48px, 10vw, 80px); line-height: 1; letter-spacing: -0.04em; margin: 0 0 12px; }
.lede { font-size: 22px; color: var(--muted); margin: 0 0 24px; }
h2 { font-size: 24px; letter-spacing: -0.02em; margin: 0 0 20px; }
h3 { font-size: 18px; margin: 0; }

a { color: var(--accent); }
.links { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 28px; }
.links a { font-weight: 600; text-decoration: none; }
.links a:hover { text-decoration: underline; }

code, pre { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px; }
:not(pre) > code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0;
  line-height: 1.5;
}
pre.diagram { margin-bottom: 24px; }
pre.text { background: var(--surface); white-space: pre-wrap; }

.points { padding-left: 20px; }
.points li { margin-bottom: 10px; }
.note { color: var(--muted); font-size: 14px; }

.toc { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.toc a {
  font: 500 13px/1 "JetBrains Mono", monospace;
  text-decoration: none;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}
.toc a:hover { border-color: var(--accent); }

.component {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  scroll-margin-top: 16px;
}
.component header { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.component > p { color: var(--muted); margin: 6px 0 16px; }

.tag { font: 500 12px/1 "JetBrains Mono", monospace; padding: 5px 8px; border-radius: 999px; }
.tag.anyone { background: var(--accent-soft); color: var(--accent); }
.tag.code { background: var(--warn-soft); color: var(--warn); }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pair > * { min-width: 0; }
figure { margin: 0; }
figcaption { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 6px; }

.roadmap { padding-left: 22px; }
.roadmap li { margin-bottom: 8px; }
.roadmap li.done { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--accent); }

footer { max-width: 880px; margin: 0 auto; padding: 32px 16px 48px; color: var(--muted); font-size: 14px; }

@media (max-width: 680px) {
  .pair { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 32px; }
}
.pair pre { white-space: pre-wrap; word-break: break-word; }