.iot-container {
  max-width: 800px;
  margin: 60px auto;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-family: Arial, sans-serif;
}

#drop-area {
  border: 2px dashed #007cba;
  padding: 40px;
  text-align: center;
  color: #555;
  cursor: pointer;
  background: #f9f9f9;
  position: relative;
}

#drop-area input[type="file"] {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

#iot-results img {
  max-width: 150px;
  margin: 10px;
}