body {
  background-color: #1E1E1E;
}

#logo {
  width: 100px;
  height: 100px;
  margin: 0 0 0 auto;
  display: block;
}

div {
  width: 30%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

input {
  height: 30px;
  margin: 10px 0;
  padding: 0 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
}

button {
  margin-top: 20px;
}

.qr {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  display: block;
}