:root {
  --bg: #f7f6f2; --fg: #1d2420; --muted: #5d6862; --card: #ffffff; --line: #dfe3dc;
  --accent: #2a7a4b; --accent-fg: #ffffff; --code: #eef1ec;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141815; --fg: #e8ece8; --muted: #a3ada6; --card: #1c221e; --line: #2e3631;
          --accent: #5cc08a; --accent-fg: #0f1a13; --code: #242b26; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; gap: 16px; align-items: center; margin-bottom: 8px; }
header img { width: 64px; height: 64px; flex: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0; }
h2 { font-size: 1.3rem; margin: 2.2em 0 .5em; }
h3 { font-size: 1.05rem; margin: 1.6em 0 .3em; }
p, li { max-width: 68ch; }
a { color: var(--accent); }
.lead { color: var(--muted); font-size: 1.1rem; margin-top: 4px; }
.langs { font-size: .95rem; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin: 20px 0; }
.buttons { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.button { display: inline-block; padding: 10px 18px; border-radius: 8px; text-decoration: none; font-weight: 600;
          border: 1px solid var(--accent); }
.button.primary { background: var(--accent); color: var(--accent-fg); }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: .92em; overflow-wrap: anywhere; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.hint { color: var(--muted); font-size: .95rem; margin-top: -8px; }