:root {
  color: #1f2937;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f4f6;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 420px);
  padding: 40px 24px;
  text-align: center;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 12px 32px rgb(31 41 55 / 12%);
}

h1 {
  margin: 0 0 28px;
  font-size: clamp(1.75rem, 8vw, 2.5rem);
}

button {
  padding: 12px 24px;
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  background: #2563eb;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

button:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 3px;
}

#message {
  min-height: 1.5em;
  margin: 24px 0 0;
  color: #047857;
  font-weight: 700;
}