:root {
  color-scheme: light;
  --navy: #0f2a4a;
  --navy-solid: #142c4c;
  --navy-solid-hover: #1f3f68;
  --bg: #f4f6f8;
  --card: #ffffff;
  --border: #dfe4ea;
  --text: #1a2433;
  --text-muted: #5b6675;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 48px 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(15, 42, 74, 0.06);
}

h1 {
  color: var(--navy);
  font-size: 1.4rem;
  margin: 0 0 16px;
}

#status {
  color: var(--text-muted);
  margin-bottom: 20px;
}

button {
  background: var(--navy-solid);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: var(--navy-solid-hover);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 24px;
}