:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #243447;
  background: #f3f7fb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(640px, calc(100% - 32px));
  margin: auto;
  padding: 48px 28px;
  text-align: center;
  background: #fff;
  border: 1px solid #e1eaf2;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(28, 55, 80, .08);
}

h1 {
  color: #285b85;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
}

p {
  line-height: 1.9;
}

footer {
  padding: 20px 12px;
  text-align: center;
  color: #718096;
  font-size: .85rem;
}