:root {
  color-scheme: light dark;
  --page: #f5f6f4;
  --panel: #fff;
  --text: #1b241f;
  --muted: #485a50;
  --line: #d3dcd6;
  --link: #1c634d;
  --active: #e8f1ec;
  font: 1rem / 1.75 system-ui, -apple-system, "PingFang TC", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --page: #141b17; --panel: #1c2721; --text: #f0f6f2; --muted: #becfc4;
    --line: #3e5146; --link: #99e2bd; --active: #284136; }
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--text); }
a { color: var(--link); text-underline-offset: .2em; overflow-wrap: anywhere; }
a:focus-visible { outline: .18rem solid var(--link); outline-offset: .2rem; border-radius: .18rem; }
.wrap { width: min(calc(100% - 2rem), 53rem); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: var(--panel); }
.site-header .wrap { padding-block: .65rem; }
.brand { display: inline-block; padding-block: .35rem; font-weight: 700; }
main { padding-block: clamp(1.4rem, 4vw, 2.8rem); }
h1, h2 { line-height: 1.35; overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(1.65rem, 4vw, 2.5rem); }
h2 { font-size: 1.22rem; margin: 1.65rem 0 .4rem; }
p, ol { margin-block: .65rem; }
ol { padding-inline-start: 1.6em; }
li + li { margin-top: .5rem; }
.lede, footer { color: var(--muted); }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); margin-top: 1.35rem; }
.card { border: 1px solid var(--line); border-radius: 1.05rem; background: var(--panel);
  padding: clamp(1.05rem, 4vw, 1.65rem); min-width: 0; }
.card h2:first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
.card-links, .app-nav { display: flex; flex-wrap: wrap; gap: .4rem .65rem; }
.card-links { margin-top: .85rem; }
.card-links a, .app-nav a { display: inline-block; padding: .45rem .75rem; border-radius: .55rem; }
.card-links a { border: 1px solid var(--line); }
.app-nav { margin: .9rem 0 1.15rem; }
.app-nav a[aria-current="page"] { background: var(--active); color: var(--text); font-weight: 650; text-decoration: none; }
.contact { display: inline-block; margin-block: .3rem; font-weight: 650; }
footer { border-top: 1px solid var(--line); padding-block: .8rem 1.6rem; font-size: .94rem; }