:root {
  color-scheme: dark;
  --bg: #0f1115;
  --card: #181b22;
  --text: #eef0f4;
  --muted: #9aa3b2;
  --accent: #4ade80;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

main {
  max-width: 28rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

.lead,
.muted {
  color: var(--muted);
}

section {
  background: var(--card);
  border-radius: 1rem;
  padding: 1.25rem;
  margin-top: 1.25rem;
}

h2 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

.button {
  display: block;
  width: 100%;
  box-sizing: border-box;
  margin: 0.75rem 0;
  padding: 0.9rem 1rem;
  border: 0;
  border-radius: 0.75rem;
  background: var(--accent);
  color: #06140b;
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  outline: 1px solid #333a47;
}

.button.disabled {
  opacity: 0.4;
  pointer-events: none;
}

code {
  display: block;
  word-break: break-all;
  color: var(--muted);
}