:root {
  --fg: #1f2933;
  --muted: #5f6c7b;
  --bg: #ffffff;
  --accent: #0b5cad;
  --border: #d9e0e7;
  --code-bg: #f3f5f8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e9ee;
    --muted: #9aa5b1;
    --bg: #14181d;
    --accent: #6cb2ff;
    --border: #2b333c;
    --code-bg: #1e242b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

header.site {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
}

header.site .inner {
  max-width: 52rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
}

header.site .brand { font-weight: 700; color: var(--fg); text-decoration: none; }
header.site nav a { margin-right: 1rem; }

a { color: var(--accent); }

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

h1 { font-size: 2rem; margin-bottom: 0.25rem; }
h2 { margin-top: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
h3 { margin-top: 1.5rem; }

.subtitle { color: var(--muted); margin-top: 0; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  border-radius: 4px;
}
code { padding: 0.1rem 0.3rem; font-size: 0.92em; }
pre { padding: 0.75rem 1rem; overflow-x: auto; }
pre code { padding: 0; background: none; }

.task {
  border-left: 4px solid var(--accent);
  background: var(--code-bg);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
}
.task strong.label { color: var(--accent); }

.hint { color: var(--muted); font-style: italic; }

footer.site {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1rem;
  text-align: center;
}
footer.site p { max-width: 52rem; margin: 0.25rem auto; }

/* part2.html */
.state { border: 1px solid var(--border); border-radius: 6px; padding: 0.5rem 1rem; margin: 1rem 0; }
.county { margin: 0.5rem 0; padding-left: 0.75rem; border-left: 3px solid var(--border); }
.county h2 { border: none; margin: 0; font-size: 1.1rem; }