:root {
  --bg: #fbfaf6;
  --ink: #1a1a1a;
  --muted: #666;
  --rule: #d8d4c7;
  --accent: #8a3a2a;
  --accent-soft: #f3e9e1;
  --code-bg: #f4f1e8;
  --max: 38rem;
  --ok: #3b6b3b;
  --warn: #8a5a12;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181715;
    --ink: #ece8de;
    --muted: #9a958a;
    --rule: #3a3530;
    --accent: #d28a72;
    --accent-soft: #2a2520;
    --code-bg: #221f1a;
    --ok: #7fb878;
    --warn: #e0b56a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--max); margin: 4rem auto; padding: 0 1.4rem 4rem; }
h1 { font-size: 1.9rem; font-weight: 700; line-height: 1.15; margin: 0 0 .3rem; letter-spacing: -.01em; }
h2 { font-size: 1.25rem; font-weight: 700; margin: 2.6rem 0 .8rem; letter-spacing: -.005em; }
h3 { font-size: 1.05rem; font-weight: 600; margin: 1.6rem 0 .5rem; }
.meta { color: var(--muted); font-size: .9rem; margin-bottom: 2rem; }
.crumb { color: var(--muted); font-size: .9rem; margin: 0 0 .6rem; }
.crumb a { color: var(--accent); text-decoration: none; }
p { margin: 0 0 1rem; }
blockquote {
  margin: 1.6rem 0;
  padding: .9rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-style: italic;
  border-radius: 0 4px 4px 0;
}
blockquote p { margin: 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.4rem 0; }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 3px; font-size: .92em; }
.twocol { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.4rem 0; }
@media (max-width: 540px) { .twocol { grid-template-columns: 1fr; } }
.col {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem 1.1rem;
  min-width: 0;
}
.col h3 { margin-top: 0; }
.col.wrong h3::before { content: "✗ "; color: var(--accent); }
.col.right h3::before { content: "✓ "; color: var(--ok); }
.callout {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem 1.1rem;
  margin: 1.4rem 0;
}
.callout.warn { border-left: 3px solid var(--warn); }
.callout.safe { border-left: 3px solid var(--ok); }
ol.steps { padding-left: 1.4rem; }
ol.steps li { margin-bottom: .7rem; }
ul, ol { padding-left: 1.4rem; margin: 0 0 1rem; }
li { margin-bottom: .4rem; }
label { display: block; font-weight: 600; margin: 1rem 0 .35rem; }
textarea, input[type="text"] {
  width: 100%;
  font: inherit;
  padding: .55rem .65rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--bg);
  color: var(--ink);
}
.choices { display: flex; flex-direction: column; gap: .45rem; margin: .4rem 0 1rem; }
.choices label { font-weight: 400; margin: 0; display: flex; gap: .5rem; align-items: flex-start; }
button {
  margin-top: 1rem;
  margin-right: .6rem;
  font: inherit;
  padding: .55rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
#status { font-size: .88rem; color: var(--accent); margin-left: .4rem; }
.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 3rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: .92rem;
}
.pager a { color: var(--accent); text-decoration: none; }
.pager .next { text-align: right; }
.empty { flex: 1; }
.footer-note {
  color: var(--muted);
  font-size: .85rem;
  margin-top: 2.4rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--rule);
}