:root { color-scheme: light dark; }
body {
  margin: 0;
  font: 1rem/1.5 system-ui, sans-serif;
  background: #f4f5f7;
  color: #1c1e21;
}
main {
  max-width: 30rem;
  margin: 0 auto;
  padding: 3rem 1rem;
  text-align: center;
}
img { max-width: 100%; height: auto; border-radius: .75rem; }
h1 { font-size: 1.5rem; margin: 1rem 0 .25rem; }
p { margin: 0 0 1.5rem; color: #5b616b; }
nav a {
  display: block;
  margin: .75rem 0;
  padding: .9rem 1rem;
  border-radius: .75rem;
  background: #fff;
  border: 1px solid #d5d9df;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}
nav a:hover, nav a:focus-visible { border-color: #1c1e21; }
@media (prefers-color-scheme: dark) {
  body { background: #15171a; color: #eceef1; }
  p { color: #a2a9b4; }
  nav a { background: #1f2226; border-color: #363b42; }
  nav a:hover, nav a:focus-visible { border-color: #eceef1; }
}