* {
  box-sizing: border-box;
}

.guide {
  border: 1px solid #ff0000;
}

/* 
fc5135
1c1a30
4e203c */
body {
  background-color: #b3b4b3;
}

h1 {
  margin-top: 20px;
  color: #fc5135;
}

.qrcode {
  width: 200px;
}

.mt-10 {
  margin-top: 10px;
}

.card {
  margin: 20px auto;
  text-align: center;
  color: #eee;
  width: 340px;
  height: 680px;
  background-color: #000;
}