:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #0a0e16;
  --muted: #475569;
  --accent: #5a3fd6;
  --rule: #e2e8f0;
  --card: #f6f7fb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0e16;
    --text: #f8fafc;
    --muted: #94a3b8;
    --accent: #a590ff;
    --rule: #2a2f3a;
    --card: #0d1320;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1rem 4rem;
}

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .5rem; }
h2 { font-size: 1.25rem; margin: 2.25rem 0 .5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); }
p, ul { margin: .75rem 0; }
li { margin: .4rem 0; }
.lead { color: var(--muted); font-size: 1.1rem; }
.meta { color: var(--muted); font-size: .9rem; }

a { color: var(--accent); text-underline-offset: .15em; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--card); padding: .5rem .75rem; }

.brand { display: flex; align-items: center; gap: .75rem; margin-bottom: 2rem; font-weight: 600; }
.brand img { width: 40px; height: 40px; border-radius: 9px; }
.brand a { color: inherit; text-decoration: none; }

footer { margin-top: 3rem; color: var(--muted); font-size: .9rem; }