body {
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 20px;
}

.video-container {
  position: relative;
  display: inline-block;
}

video {
  width: 100%;
  max-width: 400px;
  border: 2px solid #333;
  border-radius: 10px;
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  max-width: 400px;
  border-radius: 10px;
}

#scanner-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(0, 255, 0, 0.7);
  animation: scan 2s infinite;
}

@keyframes scan {
  0% { top: 0; }
  50% { top: calc(100% - 3px); }
  100% { top: 0; }
}

#resultado-container {
  margin-top: 20px;
}

#resultado {
  font-size: 1.2em;
  font-weight: bold;
  color: green;
}

#codigo-img {
  max-width: 200px;
  margin-top: 10px;
  border: 2px solid #333;
  border-radius: 5px;
}

button {
  margin: 10px 5px;
  padding: 10px 20px;
  font-size: 1em;
}