:root { --max: 820px; --pad: 1rem; }
* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif; margin: 0; line-height: 1.65; color: #111; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 3rem var(--pad); }
.lead { font-size: 1.1rem; color: #333; }
.muted { color: #555; }
hr { border: 0; border-top: 1px solid #eee; margin: 2rem 0; }
button.choice {
  display: block;
  width: 100%;
  text-align: left;
  font-size: 1rem;
  margin: 0.5rem 0;
  padding: 0.7rem 0.9rem;
  border: 1px solid #bbb;
  border-radius: 8px;
  background: #f3f3f3;
  cursor: pointer;
}
button.choice:hover { background: #e9e9e9; }
nav a { margin-right: 0.75rem; }
code { background: #f6f6f6; padding: 0.1rem 0.25rem; border-radius: 4px; }