:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
}
body {
  margin: 0;
  min-height: 100svh;
  display: grid;
  place-items: center;
  background: light-dark(#f8fafc, #111827);
  color: light-dark(#172033, #f1f5f9);
}
main {
  width: min(23rem, calc(100vw - 5rem));
  padding: 2rem;
  border: 1px solid light-dark(#e2e8f0, #374151);
  border-radius: 1rem;
  background: light-dark(white, #1f2937);
}
.brand {
  font-weight: 700;
  letter-spacing: 0.06em;
}
h1 {
  font-size: 1.6rem;
}
p {
  line-height: 1.7;
}
button {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #94a3b8;
  border-radius: 0.5rem;
  font: inherit;
  cursor: pointer;
}
button:disabled {
  opacity: 0.65;
  cursor: wait;
}
a {
  color: light-dark(#4338ca, #a5b4fc);
}
#message {
  color: light-dark(#b91c1c, #fca5a5);
  min-height: 1.7em;
}