.container {
  width: 800px;
  height: 500px;
  display: flex;
  padding: 15px;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

.input-section, .settings-section, .qrcode-section {
  flex: 1;
  padding: 15px;
  box-sizing: border-box;
}

.file-upload {
  margin-top: 15px;
  margin-bottom: 15px;
}

.file-name {
  margin-top: 5px;
  font-size: 12px;
  color: #666;
}

.input-section {
  border-right: 1px solid #eee;
}

.settings-section {
  border-right: 1px solid #eee;
}

textarea {
  width: 100%;
  height: 200px;
  padding: 10px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
  resize: none;
}

button {
  margin-top: 10px;
  padding: 8px 16px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

button:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
}

.setting-item {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

input[type="number"] {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
}

#qrcode-container {
  width: 100%;
  height: 250px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px dashed #ccc;
  margin-bottom: 15px;
}

h3 {
  margin-top: 0;
  color: #333;
}