* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #111111;
}

a {
  color: #111111;
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 560px);
  border: 1px solid #e5e5e5;
  border-radius: 16px;
  padding: 32px;
  background: #ffffff;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #666666;
}

h1 {
  margin: 0 0 12px;
  font-size: 32px;
  font-weight: 600;
}

p {
  margin: 0 0 16px;
  line-height: 1.5;
}

.amount {
  font-size: 28px;
  font-weight: 600;
}

.checkout-box {
  min-height: 320px;
  border: 1px solid #ededed;
  border-radius: 12px;
  padding: 16px;
  background: #fafafa;
}

.status {
  margin-bottom: 16px;
}

.message {
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  background: #f7f7f7;
}

.muted {
  color: #666666;
}

.hidden {
  display: none;
}