:root { color-scheme: light dark; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.lang-switch {
  max-width: 720px;
  margin: 1rem auto 0;
  padding: 0 1.25rem;
  text-align: right;
  font-size: 1.1rem;
  opacity: .5;
}

.lang-switch a { text-decoration: none; }
.lang-switch a:hover { opacity: 1; }

main {
  max-width: 720px;
  margin: 10vh auto 0;
  padding: 0 1.25rem 3rem;
}

.card {
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(127,127,127,.25);
  border-radius: 12px;
}

h1 { margin-top: 0; font-size: 1.8rem; }