:root {
  color-scheme: light dark;
  --canvas: #f9f9f9;
  --ink: #202020;
  --ink-soft: #525252;
  --line: #d8d8d8;
  --link: #644a40;
  --code: #efefef;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--canvas);
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 43rem; margin: 0 auto; padding: 5rem 1.5rem 2rem; }
h1 { margin: 0 0 1rem; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 2rem; line-height: 1.2; font-weight: 600; letter-spacing: -0.06em; }
h2 { margin: 0 0 1rem; font-size: 1.125rem; line-height: 1.5; font-weight: 650; letter-spacing: -0.02em; }
p { margin: 0 0 1rem; font-size: 1rem; line-height: 1.75; color: var(--ink-soft); }
p:last-child { margin-bottom: 0; }
.intro { font-size: 1.125rem; line-height: 1.65; }
nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.75rem; margin: 1.25rem 0 1.75rem; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 5px; border-radius: 2px; }
nav a, footer a { display: inline-flex; align-items: center; gap: 0.4rem; min-height: 44px; font-size: 1rem; }
section { border-top: 1px solid var(--line); padding: 1.75rem 0; }
code { background: var(--code); border-radius: 4px; padding: 0.12rem 0.3rem; font-size: 0.9em; }
footer { border-top: 1px solid var(--line); padding-top: 1rem; }
::selection { background: #ffdfb5; color: #202020; }

@media (max-width: 480px) {
  main { padding-top: 2.5rem; }
}

@media (prefers-color-scheme: dark) {
  :root { --canvas: #111111; --ink: #eeeeee; --ink-soft: #b4b4b4; --line: #35312c; --link: #ffe0c2; --code: #222222; }
}