:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #243038;
  background: #f4f7f6;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  background:
    radial-gradient(circle at 50% 25%, rgba(38, 123, 104, 0.08), transparent 36rem),
    #f4f7f6;
}

main {
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
}

.card {
  width: min(100%, 32rem);
  padding: 4rem 2rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(36, 48, 56, 0.08);
  border-radius: 1.25rem;
  box-shadow: 0 1rem 3rem rgba(31, 56, 50, 0.08);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 650;
  letter-spacing: 0.08em;
}

p {
  margin: 1rem 0 0;
  color: #6b777d;
  font-size: 1rem;
  letter-spacing: 0.12em;
}

footer {
  padding: 1.25rem;
  text-align: center;
  font-size: 0.875rem;
}

footer a {
  color: #66747a;
  text-decoration: none;
}

footer a:hover,
footer a:focus-visible {
  color: #1f735f;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}