:root {
  --bg: #ffffff; --fg: #1b1f24; --muted: #59636e; --border: #d1d9e0;
  --accent: #4f46e5; --accent-fg: #ffffff; --soft: #eef2ff; --danger: #b42318;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #15191f; --fg: #e6edf3; --muted: #9198a1; --border: #3d444d;
    --accent: #818cf8; --accent-fg: #0d1117; --soft: #232946; --danger: #ff8a7a; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 18px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}
.top { max-width: 760px; margin: 0 auto; padding: 20px 16px 0; display: flex; justify-content: space-between; align-items: center; }
.top nav a { color: var(--fg); font-weight: 600; text-decoration: none; padding: 8px 4px; }
.top nav a:hover { color: var(--accent); }
.brand { font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; display: inline-flex; gap: 10px; align-items: center; }
.brand::before { content: ""; width: 26px; height: 26px; background: url(/icon.svg) center / contain no-repeat; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 22px; margin: 40px 0 12px; }
.eyebrow { color: var(--accent); font-weight: 600; margin: 0 0 6px; font-size: 16px; }
.meta, .help { color: var(--muted); }
.meta { margin: 0; }
.help { font-size: 16px; }
.lede { font-size: 21px; color: var(--muted); }
.play { margin-top: 24px; background: var(--soft); border-radius: 16px; padding: 20px 22px; }
.play p { margin: 0 0 8px; }
.play .help { margin: 10px 0 0; }
button {
  font: inherit; cursor: pointer; border-radius: 12px; padding: 10px 18px;
  border: 1px solid var(--border); background: var(--bg); color: var(--fg);
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); font-weight: 600; }
button.big { font-size: 20px; padding: 14px 26px; }
button:disabled { opacity: 0.7; cursor: progress; }
button:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.error { color: var(--danger); }
.done { font-weight: 600; margin: 0; }
.steps { padding: 0; margin: 0; list-style: none; counter-reset: step; display: grid; gap: 12px; }
.steps li { counter-increment: step; border: 1px solid var(--border); border-radius: 14px; padding: 14px 18px 14px 64px; position: relative; }
.steps li::before {
  content: counter(step); position: absolute; left: 16px; top: 14px; width: 32px; height: 32px; border-radius: 50%;
  background: var(--soft); color: var(--accent); font-weight: 700; display: grid; place-items: center; font-size: 16px;
}
.steps h3 { margin: 0; font-size: 18px; }
.steps p { margin: 4px 0 0; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, monospace; }
.source { margin-top: 32px; }
.source summary { cursor: pointer; font-weight: 600; }
pre { overflow-x: auto; background: var(--soft); border-radius: 12px; padding: 14px; font-size: 14px; line-height: 1.5; }
a { color: var(--accent); }
.eyebrow a { text-decoration: none; }
a.button {
  display: inline-block; background: var(--accent); color: var(--accent-fg); font-weight: 600;
  text-decoration: none; border-radius: 12px; padding: 12px 22px;
}
.search { display: flex; gap: 8px; margin-top: 20px; }
.search input {
  flex: 1; min-width: 0; font: inherit; padding: 10px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg); color: var(--fg);
}
.search input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.site h2 { color: var(--muted); font-size: 18px; margin: 32px 0 10px; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.cards a { display: block; height: 100%; border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; color: var(--fg); text-decoration: none; }
.cards a:hover { border-color: var(--accent); }
.cards h3 { margin: 0; font-size: 18px; }
.empty { color: var(--muted); margin-top: 28px; }
.plain { list-style: none; padding: 0; display: grid; gap: 12px; }
.plain form { display: inline; }
.review { border: 1px solid var(--border); border-radius: 14px; padding: 14px 18px; }
.review h3 { margin: 0; }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }
.foot { max-width: 760px; margin: 48px auto 0; padding: 0 16px 32px; color: var(--muted); font-size: 15px; }
.foot a { color: var(--muted); }
.prose ul { padding-left: 22px; }
.prose li { margin: 8px 0; }