body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
}

.container {
  max-width: 420px;
  margin: 40px auto;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  text-align: center;
}

h1 {
  font-size: 22px;
  margin: 0 0 18px;
}

.label {
  display: block;
  text-align: left;
  font-size: 13px;
  margin: 10px 0 6px;
  color: #333;
}

input {
  width: 100%;
  margin: 0 0 8px;
  padding: 10px;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  cursor: pointer;
}

.qrBox {
  margin-top: 18px;
  display: flex;
  justify-content: center;
}

.hint {
  margin-top: 12px;
  font-size: 12px;
  color: #666;
}