:root {
  color-scheme: light dark;
  --paper: #ffffff;
  --text: #24292f;
  --muted: #59636e;
  --line: #d1d9e0;
  --code: #f3f5f7;
  --link: #0969da;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  background: var(--paper);
  color: var(--text);
}

body { margin: 0; }
main { max-width: 760px; margin: 0 auto; padding: 48px 24px 64px; }
h1, h2 { line-height: 1.25; letter-spacing: -0.025em; }
h1 { font-size: 2.15rem; margin: 0 0 20px; }
h2 { font-size: 1.3rem; margin: 40px 0 18px; padding-bottom: 10px;
     border-bottom: 1px solid var(--line); }
p, ol, ul { margin: 0 0 18px; }
ol, ul { padding-left: 26px; }
li { padding-left: 4px; margin-bottom: 16px; }
li > p:last-child { margin-bottom: 0; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }
code { font: 0.87em/1.6 ui-monospace, SFMono-Regular, Consolas, monospace;
       background: var(--code); padding: 2px 5px; border-radius: 4px;
       overflow-wrap: anywhere; }
pre { background: var(--code); border: 1px solid var(--line); border-radius: 6px;
      padding: 16px 20px; white-space: pre-wrap; overflow-wrap: anywhere; }
pre code { padding: 0; background: none; user-select: all; }
blockquote { margin: 12px 0 22px; padding: 2px 0 2px 18px;
             border-left: 3px solid var(--line); color: var(--muted); }
blockquote p:last-child { margin-bottom: 0; }
footer { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line);
         font-size: 0.85rem; }

@media (max-width: 520px) {
  :root { font-size: 16px; }
  main { padding: 28px 20px 44px; }
  h1 { font-size: 1.85rem; }
  pre { padding: 14px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1117;
    --text: #e6edf3;
    --muted: #a0aab5;
    --line: #3d444d;
    --code: #161b22;
    --link: #79b8ff;
  }
}