:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  background: #faf9f5;
  color: #1c1917;
}
body {
  margin: 0;
}
main {
  max-width: 30rem;
  margin: 10vh auto;
  padding: 1.5rem;
}
.brand {
  color: #2d5a3d;
  font-size: 1.4rem;
  font-weight: 700;
}
h1 {
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  line-height: 1.2;
}
p {
  font-size: 1rem;
  line-height: 1.65;
}
a {
  display: inline-block;
  background: #0f766e;
  color: white;
  border-radius: 0.75rem;
  padding: 0.875rem 1.25rem;
  font-weight: 600;
  text-decoration: none;
}
a[hidden] {
  display: none;
}
a:focus-visible {
  outline: 3px solid #0f766e;
  outline-offset: 4px;
}
.hint {
  color: #57534e;
}
@media (prefers-color-scheme: dark) {
  :root {
    background: #0a1118;
    color: #f1f5f9;
  }
  .brand {
    color: #a7c7a2;
  }
  .hint {
    color: #b7c4cf;
  }
}