body {
  font-family: Arial, sans-serif;
  max-width: 100%;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 30px;
}

.hidden {
  display: none;
}

#scanner {
  display: flex;
  flex-direction: column;
  align-content: center;
  justify-content: center;
  align-items: center;
}

#reader {
  width: 500px;
  height: 500px;
  position: relative;
  z-index: 1;
  justify-content: center;
  align-items: center;
}

#result-text {
  color: black;
  font-size: 16px;
}