:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  margin: 0;
  padding: 0 16px;
  line-height: 1.5;
  max-width: 880px;
  margin: 0 auto;
}
header { padding: 16px 0; border-bottom: 1px solid #8884; }
header h1 { margin: 0 0 4px; font-size: 1.4rem; }
nav a { margin-right: 12px; }
main { padding: 16px 0; }
h2 { font-size: 1.1rem; margin-top: 24px; }
form { display: flex; flex-direction: column; gap: 10px; max-width: 320px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; }
input { padding: 8px; border: 1px solid #8886; border-radius: 6px; }
button { padding: 9px 14px; border: 0; border-radius: 6px; cursor: pointer; }
code { background: #8882; padding: 1px 5px; border-radius: 4px; }
footer { margin: 32px 0 16px; padding-top: 12px; border-top: 1px solid #8884; font-size: 0.85rem; color: #8889; }
ul { padding-left: 20px; }