:root {
  --fg: #1a1a1a;
  --muted: #6b7280;
  --accent: #0f766e;
  --bg: #fafaf9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

main.pay {
  max-width: 26rem;
  margin: 12vh auto 0;
  padding: 1.5rem;
  text-align: center;
}

main.pay h1 { font-size: 1.6rem; font-weight: 600; margin-bottom: 0.5rem; }

.description { color: var(--muted); margin: 0.25rem 0 1.5rem; }

.amount { font-size: 2.6rem; font-weight: 700; margin: 0.5rem 0 2rem; }

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

.confirmed { font-size: 1.2rem; color: var(--accent); }

button.pay-now, a.button {
  display: inline-block;
  appearance: none;
  border: none;
  background: var(--accent);
  color: white;
  font-size: 1.15rem;
  font-weight: 600;
  padding: 0.9rem 3rem;
  border-radius: 0.6rem;
  cursor: pointer;
  text-decoration: none;
}

button.pay-now:active, a.button:active { filter: brightness(0.9); }