html { color-scheme: light dark; }
body { font-family: system-ui, sans-serif; line-height: 1.65; max-width: 52rem;
  margin: auto; padding: 1.25rem; overflow-wrap: anywhere; }
nav { display: flex; flex-wrap: wrap; gap: .5rem 1rem; }
a { color: light-dark(#145943, #98dbc2); text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid currentColor; outline-offset: 4px; }
section { margin-block: 2.5rem; scroll-margin-block-start: 1rem; }
h1, h2 { line-height: 1.3; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid light-dark(#bbb, #555); padding: .4rem .6rem;
  text-align: left; vertical-align: top; }
li { margin-block: .6rem; }