:root {
  --bg: #fafaf7; --fg: #1d1d1f; --muted: #5f6368; --accent: #1db954; --card: #ffffff; --border: #e3e3df;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121212; --fg: #ececec; --muted: #a0a0a0; --accent: #1ed760; --card: #1c1c1c; --border: #2c2c2c; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; justify-content: space-between; align-items: center; padding-top: 20px; padding-bottom: 8px; }
header a { color: var(--fg); text-decoration: none; font-weight: 700; }
header a.switch { font-weight: 500; color: var(--muted); border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 12px; font-size: 14px; }
main { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 8px 24px 24px; }
h1 { font-size: 1.7rem; line-height: 1.25; margin: 20px 0 4px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; padding-top: 8px; border-top: 1px solid var(--border); }
p, li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.3rem; }
li + li { margin-top: 4px; }
code { background: var(--border); border-radius: 4px; padding: 1px 5px; font-size: 0.92em; }
a { color: var(--accent); }
.meta { color: var(--muted); margin-top: 0; }
footer { color: var(--muted); font-size: 14px; padding-top: 16px; padding-bottom: 32px; }
footer a { color: var(--muted); }
nav.cards { display: grid; gap: 12px; margin: 16px 0; }
nav.cards a { display: block; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px;
  text-decoration: none; color: var(--fg); font-weight: 600; }
@media (max-width: 480px) { main { padding: 4px 16px 16px; border-radius: 0; border-left: 0; border-right: 0; }
  header, footer { padding-left: 16px; padding-right: 16px; } h1 { font-size: 1.45rem; } }