body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 24px;
  background: #f7f7f8;
  color: #222;
}

.wrap {
  max-width: 520px;
  margin: 0 auto;
}

.card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
}

h1 {
  margin-top: 0;
  font-size: 24px;
}

p {
  line-height: 1.6;
}

.hidden {
  display: none;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 16px;
  cursor: pointer;
  background: #06c755;
  color: #fff;
}

.muted {
  color: #666;
  font-size: 14px;
  margin-top: 12px;
  word-break: break-word;
}

.ng {
  color: #b42318;
}

.center {
  text-align: center;
}