:root { --bg: #ffffff; --fg: #1d1d1f; --muted: #5f6368; --rule: #dadce0; --link: #1a56b8; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181b; --fg: #e8eaed; --muted: #a0a4a8; --rule: #3c4043; --link: #8ab4f8; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main, header, footer { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
header { padding-top: 2rem; }
header p { color: var(--muted); margin-top: 0; }
h1 { font-size: 1.9rem; line-height: 1.2; margin-bottom: .25rem; }
h2 { font-size: 1.3rem; margin-top: 2.2rem; border-top: 1px solid var(--rule); padding-top: 1.2rem; }
h3 { font-size: 1.05rem; margin-top: 1.4rem; }
a { color: var(--link); }
nav ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; }
code { font-size: .92em; }
.lang { color: var(--muted); font-size: .9rem; }
footer { color: var(--muted); font-size: .9rem; padding-top: 2rem; padding-bottom: 3rem; }
input, textarea, button { font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--rule); border-radius: 4px; padding: .45rem .6rem; }
input[type="text"], input[type="email"], textarea { width: 100%; }
input:focus, textarea:focus, button:focus { outline: 2px solid var(--link); outline-offset: 1px; }
button { cursor: pointer; border-color: var(--link); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }